RE: (forte-users) Class compatibility
Pascal,
Basically the way to work with objects as parameters is to ensure that
sending and receiving parties have the same knowledge of the underlying
classes of these objects.
o Partitions in one application, generated at distribution time always are
"in sync" with one another as they use the same class definitions specified
through the supplier plan relationships of the main project
o Applications distributed independently that exchanging objects only
understand the common set of class definitions.
For example, a Forte Conductor engine object is built using the standard
Forte Framework classes. Its API specifies things like "DataValue" objects.
Sending it a TextData is fine, sending it MyOwnTextData is not - the other
application has no clue what that (sub)class is supposed to be as it did not
know at the time it was built.
This is also true in cases where applications use libraries and these are
given objects of (sub)classes it knows nothing about.
All of these generate serialisation errors of some sort since the flattened
object that is sent across the wire cannot be reconstructed at the receiving
end by lack of a blueprint (class definition) on how to create such an
object.
Theo de Klerk
Architecture & Application Integration
Professional Services
Compaq Computer Corp. - the Netherlands
PGP Fingerprint: 5A70 DD56 F3BA FE04 9DCA 1ACE 8581 0A2F F057 FA6E
Theo,
I understand all of that. Of course we make sure that all components use the
same blueprints for all classes. However, in case we managed to get these
blueprints out of sync, we don't want the application to simply crash. We
want to trap this exception and print a message that says: "There seems to
be a compatability problem between components. Please make sure the latest
version of all application components have been installed."
Of course we can trap all exceptions (GenericException) and ignore all of
them after displaying them, but that seems like a blunt-axe-approach. I'm
looking for the scalpel.
Pascal Rottier
Origin Nederland (BAS/West End User Computing)
Tel. +31 (0)10-2661223
Fax. +31 (0)10-2661199
E-mail: Pascal.Rottiernl.origin-it.com
++++++++++++++++++++++++++++
Philip Morris (Afd. MIS)
Tel. +31 (0)164-295149
Fax. +31 (0)164-294444
E-mail: Rottier.Pascalpmintl.ch
-----Original Message-----
From: Klerk, Theo de [mailto:Theo.de.Klerkcompaq.com]
Sent: Wednesday, October 18, 2000 5:15 PM
To: Rottier, Pascal; 'Forte Users'
Subject: RE: (forte-users) Class compatibility
Pascal,
Basically the way to work with objects as parameters is to ensure that
sending and receiving parties have the same knowledge of the underlying
classes of these objects.
o Partitions in one application, generated at distribution time always are
"in sync" with one another as they use the same class definitions specified
through the supplier plan relationships of the main project
o Applications distributed independently that exchanging objects only
understand the common set of class definitions.
For example, a Forte Conductor engine object is built using the standard
Forte Framework classes. Its API specifies things like "DataValue" objects.
Sending it a TextData is fine, sending it MyOwnTextData is not - the other
application has no clue what that (sub)class is supposed to be as it did not
know at the time it was built.
This is also true in cases where applications use libraries and these are
given objects of (sub)classes it knows nothing about.
All of these generate serialisation errors of some sort since the flattened
object that is sent across the wire cannot be reconstructed at the receiving
end by lack of a blueprint (class definition) on how to create such an
object.
Theo de Klerk
Architecture & Application Integration
Professional Services
Compaq Computer Corp. - the Netherlands
PGP Fingerprint: 5A70 DD56 F3BA FE04 9DCA 1ACE 8581 0A2F F057 FA6E
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Similar Messages
-
RE: (forte-users) Help on 'The class has been voided andcannot be insta
PB Solved.
The symtom was that my 'windows' plan that I distrubute call
the StartMethod of a class defined higher in the hierarchy,
and I had to specify that plan as direct supplier plan of my
new project for the 'voided' not to happen.
cheers
j-p
-----Message d'origine-----
De: Jean-Paul Gabrielli [mailto:Jean-Paul.Gabriellisema.fr]
Date: mercredi 5 juillet 2000 12:08
À: Klerk, Theo de
Objet: RE: (forte-users) Help on 'The class has been voided and cannot
be instanciated' plz
the issue is as follows:
I distribute a plan A
I want to rename the plan,
and create a plan B that has A as supplier.
Distributing B wor'ks
Running it fails with that issue.
Actually I recreated supplierplans in B as they were defined in A,
and the problem disappeared.
thansk for your time
j-paul
-----Message d'origine-----
De: Klerk, Theo de [mailto:Theo.de.Klerkcompaq.com]
Date: mardi 4 juillet 2000 22:31
À: 'Jean-Paul.Gabriellisema.fr'
Objet: RE: (forte-users) Help on 'The class has been voided and cannot
be instanciated' plz
Jean-Paul,
It would help if you have a bit more description around thesituation when
this error happens.
Could it be you have two service objects that refer to each other
while the
partition is still starting up? (SO's are not supposed to talk to
each other
during partition startup).
Or was the partition up and running?
Has the service object been in existence and used before itbecame voided?
Is the partition compiled or interpreted?
Theo de Klerk
Architecture & Application Integration
Professional Services
Compaq Computer Corp. - the Netherlands
PGP Fingerprint: 5A70 DD56 F3BA FE04 9DCA 1ACE 8581 0A2F F057 FA6E
-----Original Message-----
From: Jean-Paul Gabrielli [mailto:Jean-Paul.Gabriellisema.fr]
Sent: Tuesday, 04 July, 2000 18:17
To: Forte-Users
Subject: (forte-users) Help on 'The class has been voided and
cannot be
instanciated' plz
Hi,
Here's the stack I get:
SYSTEM ERROR: Failed to create service object
BOS.MyServicesMgrSO.
Class: qqsp_ResourceException
Error Time: Tue Jul 4 18:05:07
Exception occurred (locally) on partition "BC_cl0_Part3",
(partitionId =
AF3B67A0-3335-11D4-BE9D-963C5A7FAA77:0x224, taskId =
[AF3B67A0-3335-11D4-BE9D-963C5A7FAA77:0x224.6]) in application
"BC_cl0", pid 10328 on node MyServerin environment
CentralEnv.
SYSTEM ERROR: The class MyServericesMgr has been voided and cannot
be
instantiated in this partition.
Class: qqsp_UsageException with ReasonCode: SP_ER_INVALIDSTATE
Error #: [201, 14]
Detected at: qqlo_VoidedClassException at 1
Error Time: Tue Jul 4 18:05:07
Exception occurred (locally) on partition
"BC_cl0_Part3",
(partitionId =
AF3B67A0-3335-11D4-BE9D-963C5A7FAA77:0x224, taskId
=
[AF3B67A0-3335-11D4-BE9D-963C5A7FAA77:0x224.6]) in
application
"BC_cl0", pid 10328 on node MyServer in
environment
CentralEnv.
aud Tue Jul 4 18:05:07 : Shutting down partition due to
failure of this
partition.
aud Tue Jul 4 18:05:07 : Shutting down partition as requested.
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forte-users-requestlists.xpedior.comHi Sylvain
Try using window.smallIconImage =
ImageData(<TitleBarIcon>.ImageValue) ;
This should work.
Jairaj Rampershad
System Concultant
--- Sylvain_Porée <Sylvain.Poreesophia.sema.fr>
wrote:
Hi Forte Gurus,
I have tried to set an icon using this statement :
window.SmallIconImage =
aIconFile.<TitleBarIcon>.imagevalue;
where <TitleBarIcon> is a PictureGraphic in my
window workshop.
I have tried 16*16 16 colours as well as many other
arrangements. It does
not work. I use windows NT.
Any ideas ?
Thanks
Sylvain
PS : For info (forte help):
SmallIconImage
Data Type ImageData
Source Class Window
Settable? Yes
The SmallIconImage attribute (ImageData) provides
the small icon to be used
when the window is iconized, for example, in the
task bar. The image size
for a small icon should be 16 by 16 pixels. Although
the image will be
scaled if you provide one of a different size, for
best results, we
recommend that you create your icons in the same
size in which they will be
displayed.
Windows 95/NT only
This feature is available on Windows 95/NT only. On
other platforms, the
attribute is ignored.
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forte-users-requestlists.xpedior.com -
Re: (forte-users) C++ version compatibility question. Fortev30L2 on D
Dirk:
I ran into a similar problem. I added an other flag to my fcompile script and
it seems to be working fine, your mileage may vary. The flag was
-cflags "-oldcxx only"
Dwayne Kryger
"Haben, Dirk" <[email protected]> on 08/25/99 02:09:16 AM
To: "'Soapbox Forte Users'" <[email protected]>
cc: (bcc: Dwayne Kryger/SEH)
Subject: (forte-users) C++ version compatibility question. Forte v30L2 on
Digital Unix 4 d and C++ version ???
G'day Folxs
Just installed Forte as a Simple Server on a Digital UNIX (v4.0d) box (being
a VMSbot it was much easier than I thought). We want to use it to interface
with an existing web client. The Forte part is to provide us a scalable
access path to Oracle DBs on the VMS machine; already running Forte.
I'm having trouble finding media that contains C++ v5.4.-006 for the Unix
box. Does anyone know of/has used higher versions of C++ without too much
drama? How about v5.7 or even v6.1? We will be using extensive C++
interfacing to existing web pages!
NB: The current web system client is compiled using EGCS 2.91.66.
TIA,
/[:-)irK
Dirk Haben, Perth WA
For the archives, go to: http://lists.sageit.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: [email protected]Dirk:
I ran into a similar problem. I added an other flag to my fcompile script and
it seems to be working fine, your mileage may vary. The flag was
-cflags "-oldcxx only"
Dwayne Kryger
"Haben, Dirk" <[email protected]> on 08/25/99 02:09:16 AM
To: "'Soapbox Forte Users'" <[email protected]>
cc: (bcc: Dwayne Kryger/SEH)
Subject: (forte-users) C++ version compatibility question. Forte v30L2 on
Digital Unix 4 d and C++ version ???
G'day Folxs
Just installed Forte as a Simple Server on a Digital UNIX (v4.0d) box (being
a VMSbot it was much easier than I thought). We want to use it to interface
with an existing web client. The Forte part is to provide us a scalable
access path to Oracle DBs on the VMS machine; already running Forte.
I'm having trouble finding media that contains C++ v5.4.-006 for the Unix
box. Does anyone know of/has used higher versions of C++ without too much
drama? How about v5.7 or even v6.1? We will be using extensive C++
interfacing to existing web pages!
NB: The current web system client is compiled using EGCS 2.91.66.
TIA,
/[:-)irK
Dirk Haben, Perth WA
For the archives, go to: http://lists.sageit.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: [email protected] -
RE: (forte-users) Domain Classes
Hi,
This thread coinsides with a recent posting I made on formatting percents
(attached at end).
The complication here is that the data field is part of an array field and
is:
1) editable
2) part of an array of BObjects that are mapped to the array field
There is no separation therefore between a BO and a DO, at least in the
current implementation. Furthermore, the user may or may not want percent to
be the display format. What I think I need is one field that actually has
two values, a display value and a 'true' value, and each would probably need
its own numeric format as well (one for data entry and one for display).
I've never used a domain class, but do you know if such a beast be possible?
-----Original Message-----
I want to provide the option for a user to display values in percents or
not, and finding this surprisingly tricky.
Although its easy to make a DecimalData with a value of .08 look like 8% by
changing the scale and multiplying by its value by 100, I don't see how to
do this in a way that the variable still knows its value is .08.Jason,
Domain Classes can also store FieldWidget information associated with them.
For example, Widget type, Max Characters, Input Mask, Size Policy, Help
Text, etc. This means that when a developer adds the domain to the window
workshop it will automatically have all the settings that were previously
defined on the domain, therefore giving a standard look and feel, as well
as, behaviour(fillstring and SetValue).
Regards,
Allister
Xpedior
www.xpedior.com
Ph: +61-8-9320-7604
Fax: +61-8-9486-8650
-----Original Message-----
From: Jason de Cean [mailto:[email protected]]
Sent: Thursday, 21 October 1999 9:30
To: 'Forte Users'
Subject: (forte-users) Domain Classes
Hi,
Can anyone tell me the advantage of using a domain class ?
We have subclassed DecimalData (FormattedDecimal) and overridden the
FillString and SetValue methods to implement other formatting. This is
then used as an attribute on our data classes and appears to work fine
when mapped to forms.
So, why would we use a Domain Class instead of just sub classing
DecimalData ?
Jace.
Jason de Cean
Genisys Team
Lumley Technology Ltd.
Lvl. 8, 55 Sussex St
Sydney, NSW 2000 Australia
Ph: 02 9248 1321
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email the word: 'Unsubscribe' to: [email protected] -
RE: (forte-users) 3J= 3M new to me error
Hi Thomas,
Thanks for your email but I think it will be interesting for Brenda not me.
It is exactly what I have expected from Forte Support: detailed information
about bugs and workarounds. But what I cannot understand is that #53398 was
released without any information about possible reasons for this problem or
suggested workarounds. My first reaction after reading this bugreport was to
open a new case at CallCenter to get more information about it. Please
release more information with your bug reports !
Regards
Zenon Adamek
Information Services
Senior Programmer Analyst
Tel: 905 712-1084 ext. 3628
Fax: 905 712-6709
E-mail: zadamekpurolator.com
-----Original Message-----
From: Thomas Degen - Sun Germany Forte Tools - Bonn
[SMTP:thomas.degensun.com]
Sent: Wednesday, September 27, 2000 9:49 AM
To: Adamek, Zenon
Cc: 'Brenda Cumming'; Forte-userslists.xpedior.com
Subject: RE: (forte-users) 3J=>3M new to me error
Hi Zenon,
bug #53398 is not a bug which will likely get fixed, it's an informational
bugreport.
You might see an errorstack like Brenda has reported (and described in
informational
bugreport #53398) probably when you are doing something illegal that is
possible
via Forte Tool but Forte is not trapping it for performance reasons. Hence
you will see
the error coming from your illegal operation only at runtime, probably
only
while
running interpreted in the Forte IDE, but in worst case it might be even a
segmentation
violation.
Technotes 12448 'Sudden client partition crashes at runtime' and 11225
'Don't reparent
mapped Widgets between UserWindows at runtime' explain this matter . See
attached.
But maybe Brenda is much more experiencing a problem as described by Forte
Technote 11398 'Read Only Workspace Errors using ListViews or ActiveX
control'
that might get easily resolved via setting of FORTE_YIELD_THROTTLE=0.
Good Luck and Best Regards !
BTW: I've logged bug #53398, so I've felt responsible to explain its real
background.
Thomas
Thomas Degen
Sun Microsystems - Forte Tools
Forte CTE & Sustaining Group
Technical Support Germany
tel.:+49.228/91499-50
MailTo:thomas.degensun.com
Technote 11398 Read Only Workspace Errors using ListViews or ActiveX
control
SCENARIO:
Getting some unusual interpreter errors that result in an error stating
that
the workspace has been set to read only. Please see Enclosures for the
two
most common error stacks that have been encountered. The abbreviated
versions of the errors are:
- Can't read record (record size = -1)
- Id in index does not match id in record header in data file
- Recursive deserialization attempted.
- Unknown Mark type in deserialization
- Could not read record (64,74615) from repository data file.
Header
is corrupt.
These errors can be happening in either the development environment when
running from one of the development workshops, or with the deployed
application.
The bug outlined in this Technote may be the culprit if the errors above
are
seen when running a client on Windows NT or Motif and the user interface
incorporates ActiveX controls or ListView/TreeView widgets.
CAUSE:
Basically what is happening is that in rare circumstances Forte may invoke
a
nested copy of the interpreter while the first interpreter has yielded.
This
is not a problem in and of itself, but in the case where the original
interpreter was in the middle of a repository fetch when it yielded, and
the second interpreter needs to fetch code as well, we will get one of the
errors listed above, depending on the exact timing. The reason for the
errors is that the repository code at this level is thread-safe but not
re-entrant. It is protected by a mutex that is already owned by the
current task. Which, given the scenario outlined here, where the two
interpreters are running inside of the same task, results in the nested
interpreter being allowed to change data out from under the first.
While for every fetch one or more calls to WindowSystem.Yield will be made
(this is there to prevent the semblance of system lock-up on Win 3.1,
where
Yield is the only way other applications can be allowed to run), there is
a parameter which controls how often to actually yield, which by default
is
set to one out of every 100 calls. This is the reason the problem is
intermittent--you need a yield to occur during a repository fetch
which starts another interpreter which also needs to fetch code from
disk.
The reason this has only surfaced recently is that the nested interpreter
scenario can only happen in 2 cases that we know of:
- ActiveX controls which respond to events/Windows messages
- Outline fields/ListViews with column(s) mapped to virtual
attributes
In all other normal cases, the yield can process the message (typically a
paint message) without starting another interpreter, so regardless of
whether
the first interpreter yielded during a repository operation or not, there
is
no conflict.
SOLUTION:
The workaround is to prevent yields altogether by setting the
FORTE_YIELD_THROTTLE environment variable equal to 0 in the client's
environment. This should have no detrimental effects since the yield code
is in place solely for Windows 3.1x clients.
ERROR STACK 1
SYSTEM ERROR: Because of a prior error, your workspace was set to
read-only to
prevent the application from attempting to write to the repository. The
repository and work you have saved to the repository are safe. If your
workspace
contains unsaved work, you may use the following procedure to save this
work.
First, export the changed components. Then, shut down and restart this
application and reopen this workspace in read-write mode. Finally, import
the
changed components and save your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 695]
Detected at: qqrp_Session::GetObjectById
Last TOOL statement: method EFWindowController.EFEventLoop
Error Time: Tue Nov 18 15:58:47
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1,
taskId =
[7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1.23]) in application
"ConPlus_GUI_cl0", pid 147 on node ISD060 in environment EdgeTest.
The remainder of the Error Manager stack is:
SYSTEM ERROR: Internal Error attempting to deserialize element (64,67470)
(fetch
bitmask is 0x20). Your workspace is now read-only to prevent the
application
from attempting to write to the repository. The repository and work you
have
saved to the repository are safe. If your workspace contains unsaved work,
you
may use the following procedure to save this work. First, export the
changed
components. Then, shut down and restart this application and reopen this
workspace in read-write mode. Finally, import the changed components and
save
your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 61]
Detected at: qqrp_LogicalSession::MaterializeObject
Last TOOL statement: method EFTabManagerNew.EFNoteBookHandler
Error Time: Tue Nov 18 15:58:47
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1,
taskId =
[7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1.23]) in application
"ConPlus_GUI_cl0", pid 147 on node ISD060 in environment EdgeTest.
SYSTEM ERROR: Unknown Mark type in deserialization.
Class: qqsp_ImplementationException
Error #: [1101, 34]
Detected at: qqrp_DeSerializeObject::ProcessHdr
Error Time: Tue Nov 18 15:58:47
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1,
taskId =
[7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1.23]) in application
"ConPlus_GUI_cl0", pid 147 on node ISD060 in environment EdgeTest.
ERROR STACK 2
SYSTEM ERROR: A serious error has occurred in Repository
(c:\PROGRA~1\CSSPTEST\conplu0). Corrective action may be necessary.
Notify
your repository administrator.
Class: qqsp_ImplementationException
Error #: [1101, 198]
Detected at: qqrp_Repository::Fetch
Last TOOL statement: method
SalesDevelopment_NWC.DEVNotifyofTabSetCurrent
Error Time: Wed Dec 03 10:27:22
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1,
taskId =
[769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1.22]) in application
"ConPlus_GUI_cl0", pid 172 on node ISD42 in environment Edge.
SYSTEM ERROR: Could not read record (64,74615) from repository data file.
Header is corrupt.
Class: qqsp_ImplementationException
Error #: [1106, 612]
Detected at: qqbt_BtreeAccess::FetchDataFileRecord
Error Time: Wed Dec 03 10:27:22
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1,
taskId =
[769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1.22]) in application
"ConPlus_GUI_cl0", pid 172 on node ISD42 in environment Edge.
Technote 11225 Don't reparent mapped Widgets between UserWindows at
runtime
It is sometimes tempting to unparent a widget from one UserWindow and
reparent
it into another at runtime. However, this can cause crashes if the widget
(or
its decendants) are "mapped" to data. Here's why...
Suppose you have two UserWindows, UW1 and UW2. UW1 contains a DataField
(DF1)
which is mapped to a TextData. UW2 contains a RadioList (RL2) which is
mapped to
a scalar Integer. At compile time, every mapped attribute is internally
assigned
a "Map ID" (a small integer) which is used to tie the Widget to its
corresponding attribute. These Map IDs are used by the Widget to look up a
pointer to their data in a "Map" which is maintained by the UserWindow.
Each
UserWindow is assumed be to independent of the others, so there is nothing
wrong
with Widgets in different UserWindows being assigned the same Map IDs.
In
this
case, let's assume that DF1 and RL2 both got assigned the same Map ID of
3. No
problem so far, since each lives in a separate UserWindow with a separate
map.
Now suppose at runtime the application "detaches" or unparents DF1 from
its
UserWindow and reparents it somewhere into UW2. When it comes time for DF1
to
paint itself the Display System it must ask the Runtime System for the
value of
DF1's mapped attribute. To do that it says "give me the value of the
TextData
for DF1. You'll find it in the Map for this UserWindow (UW1), and its Map
ID is
3". When the runtime system goes to do this it expects to find a TextData
in
this "slot" of the map, but instead it picks up the integer which is
mapped to
RL2. At best this leads to bad data being returned; more likely you get a
segfault and a crash.
If DF1 was not a mapped attribute (say, a Rectangle) there would be no
problem
because there is no data mapped to a Rectangle. If instead of moving DF1
you
created a brand new DataField on the fly there would be no problem,
because the
dynamic DataField would not have any Map ID and so couldn't conflict with
any
IDs in UW2.
So how do you solve this problem? This is exactly what Nested Windows are
all
about. While you can't move DF1 into the middle of UW2, you can nest
UW1.
This
works because UW1 brings its map with it, and when you access DF1 it knows
to
look up its value in UW1's map.
UserWindows are intended to be the "unit of compilabilty" that can be
nested
inside other UserWindows. It is dangerous to "transplant" anything from
inside
one UserWindow into another at runtime.
(Note that you can't avoid this problem by cloning DF1 because the MapID
gets
copied along with it, and the clone will fail in the same way.)
Further details explained in related technote 12448 'Sudden client
partition
crashes at runtime.'
Technote 12448 Sudden client partition crashes at runtime
Scenario : You have two UserWindows, A and B. When Window A starts up, it
instantiates an instance of B and reparents some component of B into A's
window
hierarchy.
This is not allowed and almost always leads to an error at best or at
worse a
segmentation fault.
Here's why :
When you compile a UserWindow in Forte, each "mapped attribute" (whether a
form
element or menu element) is assigned an internal ID which represents an
offset into
that UserWindow's table of mapped attributes. This offset is only valid
in the
context of the UserWindow in which it was compiled. If you detach a
FieldWidget or
MenuWidget from one compiled Window ("tmpMenu" for example) and then
parent
into another compiled window ("tmpWindow") the internal ID comes with it.
When Forte tries to make use of that copied widget it uses the ID as an
offset
into tmpWindow's table of mapped attributes. But that copied offset is
meaningless in the context of tmpWindow's table, so you get some kind off
error.
In this case it found that the data type of the variable in the slot
wasn't
what
was expected. But you might even index off the end of the table and get a
segmentation fault.
There is nothing to prevent you from dynamically creating menu items and
adding
them to a window at runtime; that will work fine. Although of course you
can't
access them via mapped attributes, since those can only be created at
compile time.
But you are not allowed to reparent a widget from one compiled UserWindow
into
the hierarchy of another.
More information may be found in technote 11225 'Don't reparent mapped
Widgets
between UserWindows at runtime'.
Possible errorstacks seen at runtime instead of a complete crash or
segmentation
violation while you are illegally reparenting a widget or menuitem between
windows
at runtime:
Map::SetSubjectData: Invalid conversion from map type 0 to subject type 22
SYSTEM ERROR: Bad parameter at location 3 in method
qqrt_MapClassAccess::ProcessSubjectData.
Class: qqsp_Exception
Error #: [1001, 381]
Detected at: qqrt_MapClassAccess::ProcessSubjectData at 3
Error Time: Wed Aug 09 13:03:57
Exception occurred (locally) on partition "testproject_CL0_Client",
(partitionId = D4914A10-36C1-11D4-91B3-419AA33BAA77:0x208:0xd,
taskId =
[D4914A10-36C1-11D4-91B3-419AA33BAA77:0x208:0xd.68]) in application
"FTLaunch_cl0", pid 672 on node ONEWAY in environment Audi3M2Env.
At 13:14 26.09.00 -0400, Adamek, Zenon wrote:
Hi,
It is the unfixed defect 53398. Please contact Forte support.
Zenon
-----Original Message-----
From: Brenda Cumming [SMTP:brenda_cummingtranscanada.com]
Sent: Tuesday, September 26, 2000 1:15 PM
To: Forte User group
Subject: (forte-users) 3J=>3M new to me error
Hi,
We are in the process of going from 3J1 to 3.0.M.2, and I am getting
this error that I am unfamiliar with on a GUI that works fine in 3J.
It
does not happen all the time, and I have been unable to establish the
pattern that kicks it off. Has anyone seen this before?
PS- this error is not occurring in the deployed (non-compiled) app,but
when I am running locally from my workspace.
SYSTEM ERROR: Bad parameter at location 6 in method
qqrt_MapClassAccess::ProcessSubjectData.
Class: qqsp_Exception
Error #: [1001, 381]
Detected at: qqrt_MapClassAccess::ProcessSubjectData at 6
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition
"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2,
taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Can't find scope 20070 for a class.
Class: qqsp_Exception
Error #: [201, 11]
Detected at: qqlo_ClassTableLoadScope at 1
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Because of a prior error, your workspace was set to
read-only to prevent the application from attempting to write to the repository.
The repository and work you have saved to the repository are safe. If
your
workspace contains unsaved work, you may use the following procedure
to save this work. First, export the changed components. Then, shut down and
restart this application and reopen this workspace in read-write mode.
Finally, import the changed components and save your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 695]
Detected at: qqrp_Session::IsDistributed
Last TOOL statement: method PPMeasWin.
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition
"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Internal Error attempting to deserialize element
(64,120684) (fetch bitmask is 0x20). Your workspace is now read-onlyto
prevent
the application from attempting to write to the repository. The
repository
and work you have saved to the repository are safe. If your workspace
contains unsaved work, you may use the following procedure to savethis
work.
First, export the changed components. Then, shut down and restart this
application and reopen this workspace in read-write mode. Finally, import the
changed components and save your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 61]
Detected at: qqrp_LogicalSession::MaterializeObject
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition
"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Recursive Deserialization attempted, Internal Error!
Class: qqsp_UsageException with ReasonCode: SP_ER_INVALIDSTATE
Error #: [301, 231]
Detected at: qqsp_DeSerializeDriver::Run at 1
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in anew
email the word: 'Unsubscribe' to:forte-users-requestlists.xpedior.com
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the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.comHi Thomas,
Thanks for your email but I think it will be interesting for Brenda not me.
It is exactly what I have expected from Forte Support: detailed information
about bugs and workarounds. But what I cannot understand is that #53398 was
released without any information about possible reasons for this problem or
suggested workarounds. My first reaction after reading this bugreport was to
open a new case at CallCenter to get more information about it. Please
release more information with your bug reports !
Regards
Zenon Adamek
Information Services
Senior Programmer Analyst
Tel: 905 712-1084 ext. 3628
Fax: 905 712-6709
E-mail: zadamekpurolator.com
-----Original Message-----
From: Thomas Degen - Sun Germany Forte Tools - Bonn
[SMTP:thomas.degensun.com]
Sent: Wednesday, September 27, 2000 9:49 AM
To: Adamek, Zenon
Cc: 'Brenda Cumming'; Forte-userslists.xpedior.com
Subject: RE: (forte-users) 3J=>3M new to me error
Hi Zenon,
bug #53398 is not a bug which will likely get fixed, it's an informational
bugreport.
You might see an errorstack like Brenda has reported (and described in
informational
bugreport #53398) probably when you are doing something illegal that is
possible
via Forte Tool but Forte is not trapping it for performance reasons. Hence
you will see
the error coming from your illegal operation only at runtime, probably
only
while
running interpreted in the Forte IDE, but in worst case it might be even a
segmentation
violation.
Technotes 12448 'Sudden client partition crashes at runtime' and 11225
'Don't reparent
mapped Widgets between UserWindows at runtime' explain this matter . See
attached.
But maybe Brenda is much more experiencing a problem as described by Forte
Technote 11398 'Read Only Workspace Errors using ListViews or ActiveX
control'
that might get easily resolved via setting of FORTE_YIELD_THROTTLE=0.
Good Luck and Best Regards !
BTW: I've logged bug #53398, so I've felt responsible to explain its real
background.
Thomas
Thomas Degen
Sun Microsystems - Forte Tools
Forte CTE & Sustaining Group
Technical Support Germany
tel.:+49.228/91499-50
MailTo:thomas.degensun.com
Technote 11398 Read Only Workspace Errors using ListViews or ActiveX
control
SCENARIO:
Getting some unusual interpreter errors that result in an error stating
that
the workspace has been set to read only. Please see Enclosures for the
two
most common error stacks that have been encountered. The abbreviated
versions of the errors are:
- Can't read record (record size = -1)
- Id in index does not match id in record header in data file
- Recursive deserialization attempted.
- Unknown Mark type in deserialization
- Could not read record (64,74615) from repository data file.
Header
is corrupt.
These errors can be happening in either the development environment when
running from one of the development workshops, or with the deployed
application.
The bug outlined in this Technote may be the culprit if the errors above
are
seen when running a client on Windows NT or Motif and the user interface
incorporates ActiveX controls or ListView/TreeView widgets.
CAUSE:
Basically what is happening is that in rare circumstances Forte may invoke
a
nested copy of the interpreter while the first interpreter has yielded.
This
is not a problem in and of itself, but in the case where the original
interpreter was in the middle of a repository fetch when it yielded, and
the second interpreter needs to fetch code as well, we will get one of the
errors listed above, depending on the exact timing. The reason for the
errors is that the repository code at this level is thread-safe but not
re-entrant. It is protected by a mutex that is already owned by the
current task. Which, given the scenario outlined here, where the two
interpreters are running inside of the same task, results in the nested
interpreter being allowed to change data out from under the first.
While for every fetch one or more calls to WindowSystem.Yield will be made
(this is there to prevent the semblance of system lock-up on Win 3.1,
where
Yield is the only way other applications can be allowed to run), there is
a parameter which controls how often to actually yield, which by default
is
set to one out of every 100 calls. This is the reason the problem is
intermittent--you need a yield to occur during a repository fetch
which starts another interpreter which also needs to fetch code from
disk.
The reason this has only surfaced recently is that the nested interpreter
scenario can only happen in 2 cases that we know of:
- ActiveX controls which respond to events/Windows messages
- Outline fields/ListViews with column(s) mapped to virtual
attributes
In all other normal cases, the yield can process the message (typically a
paint message) without starting another interpreter, so regardless of
whether
the first interpreter yielded during a repository operation or not, there
is
no conflict.
SOLUTION:
The workaround is to prevent yields altogether by setting the
FORTE_YIELD_THROTTLE environment variable equal to 0 in the client's
environment. This should have no detrimental effects since the yield code
is in place solely for Windows 3.1x clients.
ERROR STACK 1
SYSTEM ERROR: Because of a prior error, your workspace was set to
read-only to
prevent the application from attempting to write to the repository. The
repository and work you have saved to the repository are safe. If your
workspace
contains unsaved work, you may use the following procedure to save this
work.
First, export the changed components. Then, shut down and restart this
application and reopen this workspace in read-write mode. Finally, import
the
changed components and save your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 695]
Detected at: qqrp_Session::GetObjectById
Last TOOL statement: method EFWindowController.EFEventLoop
Error Time: Tue Nov 18 15:58:47
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1,
taskId =
[7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1.23]) in application
"ConPlus_GUI_cl0", pid 147 on node ISD060 in environment EdgeTest.
The remainder of the Error Manager stack is:
SYSTEM ERROR: Internal Error attempting to deserialize element (64,67470)
(fetch
bitmask is 0x20). Your workspace is now read-only to prevent the
application
from attempting to write to the repository. The repository and work you
have
saved to the repository are safe. If your workspace contains unsaved work,
you
may use the following procedure to save this work. First, export the
changed
components. Then, shut down and restart this application and reopen this
workspace in read-write mode. Finally, import the changed components and
save
your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 61]
Detected at: qqrp_LogicalSession::MaterializeObject
Last TOOL statement: method EFTabManagerNew.EFNoteBookHandler
Error Time: Tue Nov 18 15:58:47
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1,
taskId =
[7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1.23]) in application
"ConPlus_GUI_cl0", pid 147 on node ISD060 in environment EdgeTest.
SYSTEM ERROR: Unknown Mark type in deserialization.
Class: qqsp_ImplementationException
Error #: [1101, 34]
Detected at: qqrp_DeSerializeObject::ProcessHdr
Error Time: Tue Nov 18 15:58:47
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1,
taskId =
[7EFAE060-4AFA-11D1-A1C1-1FDC8A99AA77:0x446:0x1.23]) in application
"ConPlus_GUI_cl0", pid 147 on node ISD060 in environment EdgeTest.
ERROR STACK 2
SYSTEM ERROR: A serious error has occurred in Repository
(c:\PROGRA~1\CSSPTEST\conplu0). Corrective action may be necessary.
Notify
your repository administrator.
Class: qqsp_ImplementationException
Error #: [1101, 198]
Detected at: qqrp_Repository::Fetch
Last TOOL statement: method
SalesDevelopment_NWC.DEVNotifyofTabSetCurrent
Error Time: Wed Dec 03 10:27:22
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1,
taskId =
[769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1.22]) in application
"ConPlus_GUI_cl0", pid 172 on node ISD42 in environment Edge.
SYSTEM ERROR: Could not read record (64,74615) from repository data file.
Header is corrupt.
Class: qqsp_ImplementationException
Error #: [1106, 612]
Detected at: qqbt_BtreeAccess::FetchDataFileRecord
Error Time: Wed Dec 03 10:27:22
Exception occurred (locally) on partition "ConPlus_GUI_cl0_Client",
(partitionId = 769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1,
taskId =
[769D4310-6B88-11D1-84FD-65BF87C8AA77:0x121:0x1.22]) in application
"ConPlus_GUI_cl0", pid 172 on node ISD42 in environment Edge.
Technote 11225 Don't reparent mapped Widgets between UserWindows at
runtime
It is sometimes tempting to unparent a widget from one UserWindow and
reparent
it into another at runtime. However, this can cause crashes if the widget
(or
its decendants) are "mapped" to data. Here's why...
Suppose you have two UserWindows, UW1 and UW2. UW1 contains a DataField
(DF1)
which is mapped to a TextData. UW2 contains a RadioList (RL2) which is
mapped to
a scalar Integer. At compile time, every mapped attribute is internally
assigned
a "Map ID" (a small integer) which is used to tie the Widget to its
corresponding attribute. These Map IDs are used by the Widget to look up a
pointer to their data in a "Map" which is maintained by the UserWindow.
Each
UserWindow is assumed be to independent of the others, so there is nothing
wrong
with Widgets in different UserWindows being assigned the same Map IDs.
In
this
case, let's assume that DF1 and RL2 both got assigned the same Map ID of
3. No
problem so far, since each lives in a separate UserWindow with a separate
map.
Now suppose at runtime the application "detaches" or unparents DF1 from
its
UserWindow and reparents it somewhere into UW2. When it comes time for DF1
to
paint itself the Display System it must ask the Runtime System for the
value of
DF1's mapped attribute. To do that it says "give me the value of the
TextData
for DF1. You'll find it in the Map for this UserWindow (UW1), and its Map
ID is
3". When the runtime system goes to do this it expects to find a TextData
in
this "slot" of the map, but instead it picks up the integer which is
mapped to
RL2. At best this leads to bad data being returned; more likely you get a
segfault and a crash.
If DF1 was not a mapped attribute (say, a Rectangle) there would be no
problem
because there is no data mapped to a Rectangle. If instead of moving DF1
you
created a brand new DataField on the fly there would be no problem,
because the
dynamic DataField would not have any Map ID and so couldn't conflict with
any
IDs in UW2.
So how do you solve this problem? This is exactly what Nested Windows are
all
about. While you can't move DF1 into the middle of UW2, you can nest
UW1.
This
works because UW1 brings its map with it, and when you access DF1 it knows
to
look up its value in UW1's map.
UserWindows are intended to be the "unit of compilabilty" that can be
nested
inside other UserWindows. It is dangerous to "transplant" anything from
inside
one UserWindow into another at runtime.
(Note that you can't avoid this problem by cloning DF1 because the MapID
gets
copied along with it, and the clone will fail in the same way.)
Further details explained in related technote 12448 'Sudden client
partition
crashes at runtime.'
Technote 12448 Sudden client partition crashes at runtime
Scenario : You have two UserWindows, A and B. When Window A starts up, it
instantiates an instance of B and reparents some component of B into A's
window
hierarchy.
This is not allowed and almost always leads to an error at best or at
worse a
segmentation fault.
Here's why :
When you compile a UserWindow in Forte, each "mapped attribute" (whether a
form
element or menu element) is assigned an internal ID which represents an
offset into
that UserWindow's table of mapped attributes. This offset is only valid
in the
context of the UserWindow in which it was compiled. If you detach a
FieldWidget or
MenuWidget from one compiled Window ("tmpMenu" for example) and then
parent
into another compiled window ("tmpWindow") the internal ID comes with it.
When Forte tries to make use of that copied widget it uses the ID as an
offset
into tmpWindow's table of mapped attributes. But that copied offset is
meaningless in the context of tmpWindow's table, so you get some kind off
error.
In this case it found that the data type of the variable in the slot
wasn't
what
was expected. But you might even index off the end of the table and get a
segmentation fault.
There is nothing to prevent you from dynamically creating menu items and
adding
them to a window at runtime; that will work fine. Although of course you
can't
access them via mapped attributes, since those can only be created at
compile time.
But you are not allowed to reparent a widget from one compiled UserWindow
into
the hierarchy of another.
More information may be found in technote 11225 'Don't reparent mapped
Widgets
between UserWindows at runtime'.
Possible errorstacks seen at runtime instead of a complete crash or
segmentation
violation while you are illegally reparenting a widget or menuitem between
windows
at runtime:
Map::SetSubjectData: Invalid conversion from map type 0 to subject type 22
SYSTEM ERROR: Bad parameter at location 3 in method
qqrt_MapClassAccess::ProcessSubjectData.
Class: qqsp_Exception
Error #: [1001, 381]
Detected at: qqrt_MapClassAccess::ProcessSubjectData at 3
Error Time: Wed Aug 09 13:03:57
Exception occurred (locally) on partition "testproject_CL0_Client",
(partitionId = D4914A10-36C1-11D4-91B3-419AA33BAA77:0x208:0xd,
taskId =
[D4914A10-36C1-11D4-91B3-419AA33BAA77:0x208:0xd.68]) in application
"FTLaunch_cl0", pid 672 on node ONEWAY in environment Audi3M2Env.
At 13:14 26.09.00 -0400, Adamek, Zenon wrote:
Hi,
It is the unfixed defect 53398. Please contact Forte support.
Zenon
-----Original Message-----
From: Brenda Cumming [SMTP:brenda_cummingtranscanada.com]
Sent: Tuesday, September 26, 2000 1:15 PM
To: Forte User group
Subject: (forte-users) 3J=>3M new to me error
Hi,
We are in the process of going from 3J1 to 3.0.M.2, and I am getting
this error that I am unfamiliar with on a GUI that works fine in 3J.
It
does not happen all the time, and I have been unable to establish the
pattern that kicks it off. Has anyone seen this before?
PS- this error is not occurring in the deployed (non-compiled) app,but
when I am running locally from my workspace.
SYSTEM ERROR: Bad parameter at location 6 in method
qqrt_MapClassAccess::ProcessSubjectData.
Class: qqsp_Exception
Error #: [1001, 381]
Detected at: qqrt_MapClassAccess::ProcessSubjectData at 6
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition
"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2,
taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Can't find scope 20070 for a class.
Class: qqsp_Exception
Error #: [201, 11]
Detected at: qqlo_ClassTableLoadScope at 1
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Because of a prior error, your workspace was set to
read-only to prevent the application from attempting to write to the repository.
The repository and work you have saved to the repository are safe. If
your
workspace contains unsaved work, you may use the following procedure
to save this work. First, export the changed components. Then, shut down and
restart this application and reopen this workspace in read-write mode.
Finally, import the changed components and save your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 695]
Detected at: qqrp_Session::IsDistributed
Last TOOL statement: method PPMeasWin.
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition
"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Internal Error attempting to deserialize element
(64,120684) (fetch bitmask is 0x20). Your workspace is now read-onlyto
prevent
the application from attempting to write to the repository. The
repository
and work you have saved to the repository are safe. If your workspace
contains unsaved work, you may use the following procedure to savethis
work.
First, export the changed components. Then, shut down and restart this
application and reopen this workspace in read-write mode. Finally, import the
changed components and save your workspace.
Class: qqrp_RepResourceException
Error #: [1101, 61]
Detected at: qqrp_LogicalSession::MaterializeObject
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition
"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
SYSTEM ERROR: Recursive Deserialization attempted, Internal Error!
Class: qqsp_UsageException with ReasonCode: SP_ER_INVALIDSTATE
Error #: [301, 231]
Detected at: qqsp_DeSerializeDriver::Run at 1
Error Time: Wed Sep 20 14:32:54
Exception occurred (locally) on partition"ABSDevtStartUp_CL0_Client",
(partitionId = 36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2, taskId =
[36172000-5DA8-11D4-B1F0-14015EDAAA77:0x2da:0x2.25]) in
application
"Forte_cl0", pid 93 on node T5621 in environment AbisDMEnv.
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in anew
email the word: 'Unsubscribe' to:forte-users-requestlists.xpedior.com
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com -
RE: (forte-users) FW: (forte-users)
Hi there
Thanks very much for the solution - just wanted to let you know . We
implemented the design that technote 11378 suggested .
It worked .
Thanks very much
Cheers
Jen
-----Original Message-----
From: Adamek, Zenon [mailto:ZAdamekpurolator.com]
Sent: Tuesday, 20 March, 2001 9:21 PM
To: 'forte-userslists.xpedior.com'
Subject: (forte-users) FW: (forte-users)
Hi David,
The problem is that the SO uses an attribute of its class ACBAccount as
the ObjectReference pointer. SO is not a stateless object. The possible
scenario before crash can be that client A and B calls SO at the same
time. A's thread creates ACBAccount gets the ObjectReference. At this
point B's thread is activated, does the same as A creates new
ObjectReference. Probably the next switch between A and B will be in the
Connect() (B should wait for OLE server). If A is reactivated it doesn't
get the original own reference but the B's reference. It can cause the
crash and means that a thread can use reference created in some other
thread.
Regards,
Zenon
-----Original Message-----
From: David McPaul [SMTP:dmcpaullumley.com.au]
Sent: Monday, March 19, 2001 11:52 PM
To: 'forte-userslists.xpedior.com'
Subject: RE: (forte-users)
Jenni,
As Zenon has pointed out, technote 11378 talks about problems that
can occur if the calls made to an OLE object are not from within the same
thread the OLE object was created in. It goes on to show a design to
avoid
this.
However, the code you have given DOES communicate to the OLE object
in the same thread as it was created. So the problem as I see it is more
likely to be that the OLE object is not being garbage collected. Although
you do explicitly NIL out the ACBAccount object there is a technote 12453
that deals with the need to set the ObjectReference of CDispatch objects
to
NIL to allow the OLE object to be completely reclaimed by the garbage
collector. Failure to do so when using code that creates a new OLE object
every time you ask for an account validation will eventually run the
partition out of memory.
As pointed out in a previous post you can also increase
FORTE_STACK_SIZE but this will delay the problem not correct it.
Rather than create the connection each time you may want to think
about redesigning the method as shown in tech note 11378.
Cheers
David
-----Original Message-----
From: Adamek, Zenon [mailto:ZAdamekpurolator.com]
Sent: Tuesday, March 20, 2001 5:05 AM
To: 'Els, Jenni'
Cc: 'forte-userslists.xpedior.com'
Subject: RE: (forte-users)
Hi Jenni,
The most important issue by designing an OLE connection between a Forte
server partition and an OLE component is taking into account that an OLE
object can be referenced from the NT thread in Forte partition that it was
created in. It is the reason that you have no problems with your mini-app
in
single-threaded version.
This problem is discussed in the Technote 11378. You can find a workaround
for your problem there, too.
Regards,
Zenon
-----Original Message-----
From: Els, Jenni [SMTP:JElsnbs.co.za]
Sent: Monday, March 19, 2001 2:28 AM
To: 'forte-userslists.xpedior.com'
Subject: (forte-users)
Hi there
We have this situation
We are calling a Service Object (in the server partition) from ourclient
partition.This service object calls a method which calls a DLLregistered
on our server (VB code) . This VB code access a database on anotherserver
.(DSN set up on our server ).The database is sql server .
We are having the problem where for about 3 hours in the morning , the
system works perfectly. We then get a segmentation violation on this
partition . When we run interpreted we can see that this is an OLEinvoked
exception. The partition does not always show as offline in econsole
and
because it does not , we cannot 'online' another . We cannot take the
entire app down as everything hangs . Eventually our technical depthas
to
down the server
We set up a mini-app looping through and calling the DLL to simulate
the
problem . It worked fine. When we put another asynchronous task in the
method to call the service object , it erred quite soon. We thencreate
an
attribute of type mutex and locked using that. The mini-app worked.
However our app in development eventually hanged (without the
partition
coming though) .
The service Object is an environment visible service object in asingle
(non-replicated partition) . It has a dialog duration = session .
In the project is
ACB : ACBObject
ACBObject : CDispatch (shared = disallowed , distributed =
disallowed, transactional = disallowed, monitored = allowed)
ACBValidator : Object (shared = allowed , distributed =allowed,
transactional = disallowed, monitored = disallowed)
ACBVaidatorSO : ACBValidator
In this method we have this code to call the DLL
self.ACBAccount = new;
self.ACBAccount.CreateUsingCLSID(classID='{2EFD3084-7B05-11D3-857F-00105A4
8CEA0}');
pErrorMessage = new;
acbaccount.BankCode = pBankCode.value;
acbaccount.BranchCode = pBranchCode.value;
at : VariantI2 = new;
at.Value = pAccountType.Value;
acbaccount.AccountType = at.Value;
acbaccount.AccountNo = pAccountNo.value;
begin
acbaccount.Connect();
exception
when e : GenericException do
ex : GenericException = new;
ex.SetWithParams(severity = SP_ER_ERROR,
message = 'There was an error connecting to the database');
raise ex;
end;
begin
err : i2 = acbaccount.ValidateAccount();
if err != 0 then
pErrorMessage.SetValue(acbaccount.ErrDescriptionStr(iErrorCode= err));
acbaccount.Disconnect();
return false;
else
pErrorMessage.SetValue('The account is
valid!!');
acbaccount.Disconnect();
self.ACBAccount = NIL ;
return true;
end if;
exception
when e : GenericException do
acbaccount.Disconnect();
ex : GenericException = new;
ex.SetWithParams(severity = SP_ER_ERROR,
message = 'There was an error Validating the account');
Task.ErrorMgr.AddError(ex);
task.errormgr.ShowErrors();
raise e;
end;
exception
when e : GenericException do
acbaccount.Disconnect();
Task.ErrorMgr.ShowErrors();
raise e;
If anybody has any suggestions , they would be most welcome
Thanks very much
Cheers
Jenni Els************************************************************************Th
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For further details please see: http://www.nbs.co.za/emaildisclaim.htmHi there
Thanks very much for the solution - just wanted to let you know . We
implemented the design that technote 11378 suggested .
It worked .
Thanks very much
Cheers
Jen
-----Original Message-----
From: Adamek, Zenon [mailto:ZAdamekpurolator.com]
Sent: Tuesday, 20 March, 2001 9:21 PM
To: 'forte-userslists.xpedior.com'
Subject: (forte-users) FW: (forte-users)
Hi David,
The problem is that the SO uses an attribute of its class ACBAccount as
the ObjectReference pointer. SO is not a stateless object. The possible
scenario before crash can be that client A and B calls SO at the same
time. A's thread creates ACBAccount gets the ObjectReference. At this
point B's thread is activated, does the same as A creates new
ObjectReference. Probably the next switch between A and B will be in the
Connect() (B should wait for OLE server). If A is reactivated it doesn't
get the original own reference but the B's reference. It can cause the
crash and means that a thread can use reference created in some other
thread.
Regards,
Zenon
-----Original Message-----
From: David McPaul [SMTP:dmcpaullumley.com.au]
Sent: Monday, March 19, 2001 11:52 PM
To: 'forte-userslists.xpedior.com'
Subject: RE: (forte-users)
Jenni,
As Zenon has pointed out, technote 11378 talks about problems that
can occur if the calls made to an OLE object are not from within the same
thread the OLE object was created in. It goes on to show a design to
avoid
this.
However, the code you have given DOES communicate to the OLE object
in the same thread as it was created. So the problem as I see it is more
likely to be that the OLE object is not being garbage collected. Although
you do explicitly NIL out the ACBAccount object there is a technote 12453
that deals with the need to set the ObjectReference of CDispatch objects
to
NIL to allow the OLE object to be completely reclaimed by the garbage
collector. Failure to do so when using code that creates a new OLE object
every time you ask for an account validation will eventually run the
partition out of memory.
As pointed out in a previous post you can also increase
FORTE_STACK_SIZE but this will delay the problem not correct it.
Rather than create the connection each time you may want to think
about redesigning the method as shown in tech note 11378.
Cheers
David
-----Original Message-----
From: Adamek, Zenon [mailto:ZAdamekpurolator.com]
Sent: Tuesday, March 20, 2001 5:05 AM
To: 'Els, Jenni'
Cc: 'forte-userslists.xpedior.com'
Subject: RE: (forte-users)
Hi Jenni,
The most important issue by designing an OLE connection between a Forte
server partition and an OLE component is taking into account that an OLE
object can be referenced from the NT thread in Forte partition that it was
created in. It is the reason that you have no problems with your mini-app
in
single-threaded version.
This problem is discussed in the Technote 11378. You can find a workaround
for your problem there, too.
Regards,
Zenon
-----Original Message-----
From: Els, Jenni [SMTP:JElsnbs.co.za]
Sent: Monday, March 19, 2001 2:28 AM
To: 'forte-userslists.xpedior.com'
Subject: (forte-users)
Hi there
We have this situation
We are calling a Service Object (in the server partition) from ourclient
partition.This service object calls a method which calls a DLLregistered
on our server (VB code) . This VB code access a database on anotherserver
.(DSN set up on our server ).The database is sql server .
We are having the problem where for about 3 hours in the morning , the
system works perfectly. We then get a segmentation violation on this
partition . When we run interpreted we can see that this is an OLEinvoked
exception. The partition does not always show as offline in econsole
and
because it does not , we cannot 'online' another . We cannot take the
entire app down as everything hangs . Eventually our technical depthas
to
down the server
We set up a mini-app looping through and calling the DLL to simulate
the
problem . It worked fine. When we put another asynchronous task in the
method to call the service object , it erred quite soon. We thencreate
an
attribute of type mutex and locked using that. The mini-app worked.
However our app in development eventually hanged (without the
partition
coming though) .
The service Object is an environment visible service object in asingle
(non-replicated partition) . It has a dialog duration = session .
In the project is
ACB : ACBObject
ACBObject : CDispatch (shared = disallowed , distributed =
disallowed, transactional = disallowed, monitored = allowed)
ACBValidator : Object (shared = allowed , distributed =allowed,
transactional = disallowed, monitored = disallowed)
ACBVaidatorSO : ACBValidator
In this method we have this code to call the DLL
self.ACBAccount = new;
self.ACBAccount.CreateUsingCLSID(classID='{2EFD3084-7B05-11D3-857F-00105A4
8CEA0}');
pErrorMessage = new;
acbaccount.BankCode = pBankCode.value;
acbaccount.BranchCode = pBranchCode.value;
at : VariantI2 = new;
at.Value = pAccountType.Value;
acbaccount.AccountType = at.Value;
acbaccount.AccountNo = pAccountNo.value;
begin
acbaccount.Connect();
exception
when e : GenericException do
ex : GenericException = new;
ex.SetWithParams(severity = SP_ER_ERROR,
message = 'There was an error connecting to the database');
raise ex;
end;
begin
err : i2 = acbaccount.ValidateAccount();
if err != 0 then
pErrorMessage.SetValue(acbaccount.ErrDescriptionStr(iErrorCode= err));
acbaccount.Disconnect();
return false;
else
pErrorMessage.SetValue('The account is
valid!!');
acbaccount.Disconnect();
self.ACBAccount = NIL ;
return true;
end if;
exception
when e : GenericException do
acbaccount.Disconnect();
ex : GenericException = new;
ex.SetWithParams(severity = SP_ER_ERROR,
message = 'There was an error Validating the account');
Task.ErrorMgr.AddError(ex);
task.errormgr.ShowErrors();
raise e;
end;
exception
when e : GenericException do
acbaccount.Disconnect();
Task.ErrorMgr.ShowErrors();
raise e;
If anybody has any suggestions , they would be most welcome
Thanks very much
Cheers
Jenni Els************************************************************************Th
is e-mail is intended for the use of the individual or entity named above
and may contain information that is confidential and privileged. If you
are not the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this e-mail is strictly
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immediately at helpdesklumley.com.au and destroy the original message.
While this mail and any attachments have been scanned for common computer
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not accept any responsibility for the opinions expressed in this email.
For further details please see: http://www.nbs.co.za/emaildisclaim.htm -
Re: (forte-users) SAXParser and InputSource
Michael Beaulieu wrote on Mon November 8:
Hello,
I was wondering if anyone has any experience using the XMLParser
Library!? in Forte. I have no problem parsing a file using the
forte parser but when I try to parse a message/TextData object I get
the error " element not found " ( which is not due to my xml file )
The class InputSource has a method that takes SeekStream in its
setCharacterStream method:
str : MemoryStream = new();
str.open(SP_AM_READ_WRITE);
str.WriteText(myMessage);
theSource : InputSource = new();
theSource.setCharacterStream(str);
myParser.parse(theSource);Add this line after you're done writing to the MemoryStream:
str.Seek(position=0);
When the SAX parser is reading, it's reading from the current position
forward; after writing to the stream the current position is at the
end, so you have to rewind it to the beginning before giving it to the
SAX parser.
Cliff Draper
Forte Engineering
Forte Software, a subsidiary of SunWhy not this:
while myText.moveToString(' ') do
myText.ReplaceRange('-', myText.Offset, myText.Offset+1);
end while;
or if you prefer verbosity:
while myText.moveToString(source=' ') do
myText.ReplaceRange(source='-', startOffset=myText.Offset,
endOffset=myText.Offset+1);
end while;
-----Original Message-----
From: FatchJeBAM.com [mailto:FatchJeBAM.com]
Sent: Wednesday, January 12, 2000 2:51 PM
To: Troy.Burnsvacationclub.com; kamranaminyahoo.com
Subject: RE: (forte-users) search and replace within a TextData
How about this?? May have to play with start/end on ReplaceRange as I
didn't really test this
Anybody got a better way??
-- replace space with underscore
For x in 1 to myTextdata.LengthToEnd() do
If myTextData.IsSpace() then
MyTextdata.ReplaceRange('_'. Startoffset=myTextdata.offset,
endoffset=myTextdata.offset+1);
End if;
MyTextdata.MoveNext;
End for;
Jerry Fatcheric
-----Original Message-----
From: Burns, Troy [mailto:Troy.Burnsvacationclub.com]
Sent: Wednesday, January 12, 2000 9:40 AM
To: kamranaminyahoo.com
Subject: (forte-users) search and replace within a
TextData
Hello all,
I need to search within a textdata object, replacing all
occurrances of a
space
with another character. Can you give a quick code example
of how I would do
this?
Thanks in advance,
Troy
Troy Burns
Marriott Vacation Club Intl.
E-mail: troy.burnsvacationclub.com
Phone: (941) 688-7700 ext. 4408
For the archives, go to: http://lists.sageit.com/forte-users
and use
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forte-users-requestlists.sageit.com
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the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.sageit.com -
In addition to this confusion, I'd like to see some statement by Forte to
indicate
WHEN the next Forte R4 is scheduled (before the Sun era is was said to be
Summer 2000) and
WHAT exactly it will contain (major headings will do).
With the cancellation of the Forte Forum event doubt and uncertainty are
spreading in the
Forte communities that I talk with and no one seems to counterbalance these
doubts with an
official statement. How serious does Sun take TOOL Forte for the coming few
years? Release
of Fusion V2 seems to say "serious". The deafning silence with regard to R4
indicates the
opposite. And the users are divided (as always).
Theo de Klerk
Architecture & Application Integration
Professional Services
Compaq Computer Corp. - the Netherlands
-----Original Message-----
From: Rottier, Pascal [mailto:Rottier.Pascalpmintl.ch]
Sent: Tuesday, 18 April, 2000 17:49
To: 'kamranaminyahoo.com'
Subject: (forte-users) Forte ADE
A long, long time ago
In a galaxy far away....
I saw a demonstration of Forte's new Application Development
Environment,
which was more userfriendly than the current one. It also looked more
similar to the interface of the other development tools out
there, with a
tree structure and capabilities to browse through the
inheritance tree, and
not opening a new window for every project, class and method that is
accessed.
This new interface was supposed to be included in Forte 4, which would
combine TOOL and Java and would be released soon.
Since then, we've seen SynerJ and now FJEE, but Forte 4 is still not
released. And when it will be released, it still won't
support TOOL and Java
simultaneously. That's OK. I understand that.
But now I've heard that this improved ADE won't even be
included in Forte 4.
Is this true? And if so, why?
Pascal
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe,
send in a new
email the word: 'Unsubscribe' to:
forte-users-requestlists.xpedior.comYou may be interested in the following which comes from a statement of direction
recently issued by Sun.
Product Context
+ Forté 4GL is an award-winning, proven product with many unique advantages for
building
enterprise business systems that are distributed, that involve the integration
of existing
business systems as well as new functionality, and that target heterogeneous
runtime
environments.
+ Forté 4GL is recognized by Gartner Group as the most successful Enterprise
Application
Development Tool.
+ Forte 4GL has a substantial customer base that has been successful with the
product and that
looks forward to using Forté 4GL for new applications.
+ The Sun Microsystems, Inc. (SMI) development tools group (formerly Forté
Software, Inc.)
has a strong internal commitment to Forté 4GL. Forté Fusion is written with, and
is currently
being enhanced with Forté 4GL.
+ SMI has retained the Forté field sales organization as an independent unit
whose primary
product offerings are Forté 4GL and Forté Fusion. Continued volume sales of
Forté 4GL
remain the foundation of our business plan.
Product Future
+ We intend to actively enhance and promote Forté 4GL for the indefinite
future.
+ We believe Forté 4GL will flourish in the long term, especially if we are
able to harness the
considerable selling power of the entire SMI field sales organization. To make
the product
more attractive and easier to sell, we will continue to make the product more
modular and
easier to integrate with heterogeneous software environments.
+ We believe that the best opportunity for attracting new customers is to
leverage the ability of
Forté 4GL to easily build powerful shared business services (server components)
that can be
accessed by non-Forté clients (e.g., browsers, Java clients) and that can easily
integrate with
new and existing business systems.
+ We believe that Forté 4GL?s continued success is enhanced by continuing to
issue small and
frequent product releases. Our target is two such releases per year.
+ There is a great potential for our three product lines (Forté 4GL, Forté
Fusion, and Forté for
Java) to complement and reinforce each other. Interoperability among the three
product lines
is seen as a critical success factor for Forté 4GL.
Forte 4GL Statement of Direction Page 2
Sun Microsystems, Inc Proprietary and Confidential
Product Priorities
1. Interoperability with third party software components
+ External (non-4GL) client support (e.g., browsers, Java clients)
+ External server integration (e.g., messaging, component support, data
exchange)
2. Enhanced productivity
+ Increased automation (i.e., less coding)
+ Support for platform updates (e.g., new versions of OS, DBMS)
3. TOOL code to Java code migration
4. Unified developer look and feel with other Forte development products
5. Common repository
Short Term Product Plans
Mid-year release
+ New features available as ?preview? per the standard Forte maintenance
release procedures
+ Tentatively labeled ?release 3.5? and distributed as a free product
enhancement for
customers under maintenance
+ Scheduled for Summer 2000
+ Defining features
+ Introspection (reflection) ? the ability for an object to describe itself at
runtime
+ Improved integration with applications developed using Forté-for-Java
Community
Edition
+ Platform support improvements to track important operating system and
database
vendor activity
+ Target features
+ Display system enhancements (e.g., Motif 2 support, line arrowheads, window
refresh control, editable outline fields)
+ Dynamic library loading
+ Improved CORBA/IIOP support
+ Improved XML and XSLT class support
+ JMQ support
New year release
+ New features available as ?preview? per the standard Forte maintenance
release procedures
+ Tentatively labeled ?release 3.6? and distributed as a free product
enhancement for
customers under maintenance
+ Scheduled for year end 2000
+ Defining features
+ Any Release 3.5 target features that were not included in 3.5
+ Generation of EJB interfaces for R3 service objects
+ Platform support improvements to track important operating system and
database
vendor activity
+ Target features
+ COBOL record handling as part of the OS390 transaction adaptor
+ Improved runtime security
+ Interface classes for access to Netscape Server 4.0 and possibly other web
servers
Long Term Product Plans
+ To be determined by customer and market feedback.
+ A major criterion for new functionality will be enhancing the revenue
generating ability of
the product, thereby fostering its long-term health in the marketplace.
+ Substantial emphasis will be placed on creating new capabilities that enhance
the
attractiveness of the product for new users.
+ The contents of Release 3.7 (or whatever it will be called) will be
solidified just after release
3.5 ships. Subsequent planning visibility will be two forward releases.
"Klerk, Theo de" <Theo.de.Klerkcompaq.com> on 04/18/2000 12:27:36 PM
To: "'Rottier, Pascal'" <Rottier.Pascalpmintl.ch>,
"'kamranaminyahoo.com'" <kamranaminyahoo.com>
cc: (bcc: Charlie Shell/Bsg/MetLife/US)
Subject: RE: (forte-users) Forte ADE -
Re: (forte-users) access violation caught in debugmode
Eric,
There has been a problem with Forte debug mode for sometime now when the app
is silent. If you attempt to inspect the variables when the app is in the
'silent' mode, i.e., waiting on an event loop for a user input or a system
event, then you get the "Access violation caught ..." exception message and
the workspace including the launch server crashes.
If you are getting this problem in the 'step-through' mode, you should look
at the lauch server immediately after you get the exception before
everything disappears. There could be a stack backtrace due to some illegal
reference. We have faced a similar situation before but the error appeared
both in the 'debug' and 'run' modes.
Hope this helps.
Braja K Chattaraj.
From: Eric Decossaux <[email protected]>
To: forte mailing <[email protected]>
Subject: (forte-users) access violation caught in debug mode
Date: Thu, 23 Sep 1999 17:31:39 +0200
Hello,
I have a problem using Forte in debug mode. If I run my program on my NT
machine from the partition workshop (distributed run), the program works
fine except that some object does not display what I'm expecting. So I
want to use the debug mode to inspect the objets of this window. When I
choose the "local variables" option to see the content of my window, I
have a "access violation caught" and forte disappears. If I just let my
program run without choosing this option, everything is the same than
with the distributed run.
Does somebody have an idea what to look for ? I really want to look the
inside the attributes of this window.
We recently upgraded from release 30G2 to release 30L2. Could it be the
problem ?
Eric Decossaux
Cliniques Universitaires St Luc
Informatique des Laboratoires
av Hippocrate 10 / 1730
1200 Bruxelles
+32+2+764 17 53
For the archives, go to: http://lists.sageit.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: [email protected]Eric,
Another possibility has to do with the repository. You said you recently
migrated 30G2 to release 30L2.
Many strange problems have been traced to release migrations with old
repositories. If the repository was properly migrated another thing you can try
is to export the project(s) to PEX files, delete them from the repository, and
then re-import. I know this can be time consuming but I have solved more than
one unexplained problem in the IDE by doing it.
---------------------- Forwarded by Charlie Shell/Bsg/MetLife/US on 09/23/99
01:19 PM ---------------------------
"Ajith Kallambella" <[email protected]> on 09/23/99 12:08:54 PM
To: [email protected], [email protected]
cc: (bcc: Charlie Shell/Bsg/MetLife/US)
Subject: Re: (forte-users) access violation caught in debug mode
Eric,
Sometimes( 90% ) you can solve this problem by
checking out the class that is causing the crash
and force-compiling it.
If it doesn't help, run through this checklist.
1. Do you have enough memory resources.?
2. Is the object you are inspecting held in a lock ?
( mutex, transaction lock etc )
3. Does it work when you wait for sometime at the
breakpoint before inspecting the values? I mean
are you interrupting some process thread?
4. Does it work if you log the attributes using logmgr?
5. Are you using any call-outs/call-ins? Any external
systems integration? Sometimes( for reasons beyond
my comprehension ) the objects allocated outside
Forte gets corrupted when its passed back and forth.
6. ...finally...Santa Clause, help me!
Ajith Kallambella M.
Forte Systems Consultant.
From: Eric Decossaux <[email protected]>
To: forte mailing <[email protected]>
Subject: (forte-users) access violation caught in debug mode
Date: Thu, 23 Sep 1999 17:31:39 +0200
Hello,
I have a problem using Forte in debug mode. If I run my program on my NT
machine from the partition workshop (distributed run), the program works
fine except that some object does not display what I'm expecting. So I
want to use the debug mode to inspect the objets of this window. When I
choose the "local variables" option to see the content of my window, I
have a "access violation caught" and forte disappears. If I just let my
program run without choosing this option, everything is the same than
with the distributed run.
Does somebody have an idea what to look for ? I really want to look the
inside the attributes of this window.
We recently upgraded from release 30G2 to release 30L2. Could it be the
problem ?
Eric Decossaux
Cliniques Universitaires St Luc
Informatique des Laboratoires
av Hippocrate 10 / 1730
1200 Bruxelles
+32+2+764 17 53
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RE: (forte-users) (Fwd) ODBC & Dynamically Choosing aDatabase Ve ndor
The error you are getting is saying that the data source is not correctly
specified. Make sure the data source(or the name of the ODBC driver you
created) is correctly specified in your code.
ka
-----Original Message-----
From: Duncan Kinnear [mailto:[email protected]]
Sent: Sunday, December 19, 1999 6:26 PM
To: [email protected]
Subject: (forte-users) (Fwd) ODBC & Dynamically Choosing a Database
Vendor
I am trying to dynamically create a DBSession to connect to the
Microsft SQL Server ODBC Driver on a Forte Server Node.
I have tested the ODBC connection on the Local Machine and it works fine.
I have connected to the SQL Server on that machine with a Static
DBSession Object and that works fine.
I have used the same code to create a DBSession to Informix on Unix
and that worked fine.
The error I get is a converted ODBC one:
SYSTEM ERROR: Attempt to load partition named TestWinProject_cl0_Part1
failed.
Class: qqsp_ResourceException
Error #: [1001, 4]
Detected at: qqrt_ForteExecAgent::LoadPartition at 2
Error Time: Mon Dec 20 12:05:37
Distributed method called: qqrt_ForteExecAgentProxy.LoadPartition!7
(object name Unnamed) from partition "Node Manager", (partitionId =
40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11c, taskId =
[40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11c.38]) in application
"System
Manager", pid 250 on node ALLY in environment testenv
Exception occurred (remotely) on partition "Forte_Executor",
(partitionId
= 40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11e, taskId =
[40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11e.22]) in application
"TestWinProject_cl0", pid 235 on node ALLY in environment TestEnv.
SYSTEM ERROR: Failed to create service object TestDataProject.TestService.
Class: qqsp_ResourceException
Last TOOL statement: method TestServiceMgr.
Error Time: Mon Dec 20 12:05:37
Exception occurred (remotely) on partition "Forte_Executor",
(partitionId
= 40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11e, taskId =
[40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11e.22]) in application
"TestWinProject_cl0", pid 235 on node ALLY in environment TestEnv.
USER ERROR: (This error was converted)
Failed to connect to database: ForteSQLServer , username: justin .
[Microsoft][ODBC Driver Manager] Data source name not found and no
default
driver specified
Class: qqdb_RemoteAccessException with ReasonCode:
DB_ER_DBMSCONNECTION
DBMS SQLSTATE: IM002
Class: qqsp_ErrorDescriptor
Detected at: qqdb_OdbcVendorInfo::DoSQLConnect at 10
Last TOOL statement: method ServiceMgr.SetDBSession
Error Time: Mon Dec 20 12:05:37
Exception occurred (remotely) on partition "Forte_Executor",
(partitionId
= 40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11e, taskId =
[40114BC0-B0FC-11D3-B4D6-E87D6941AA77:0x11e.22]) in application
"TestWinProject_cl0", pid 235 on node ALLY in environment TestEnv.
Versions:
SQL SERVER 6.5
ODBC Driver SQL Server 2.65.0240
ODBC Manager 3.0.28.22
NT 4 sp4
Forte 3.0.J.1
The code I'm using is almost identical to that given in the "Dynamically
Choosing a Database Vendor" section of the "Making a Database
Connection" chapter of the "Accessing Databases" manual.
Any suggestions would be greatly appreciated
Thanks in advance.
Cheers,
Duncan Kinnear,
McCarthy and Associates, Email:
[email protected]
PO Box 764, McLean Towers, Phone: +64 6 834 3360
Shakespeare Road, Napier, New Zealand. Fax: +64 6 834 3369
Providing Integrated Software to the Meat Processing Industry for over 10
years
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email the word: 'Unsubscribe' to: [email protected] -
Subject: RE :(forte-users) Web enterprise & user visibleservice Objects
A few months ago we faced a similar problem while migrating from classic
Forte to Web. We had to protect our investment in various frameworks that we
wrote for the classic Forte apps, which made use of extensive
user-level-caching among other things.
We solved the problem using a custom routing mechanism. In brief, we created
several( replicated) server partitions that contains all the user-level
Service objects that existed in the class-Forte apps. Then we wrote a
'custom-router' which mimics Forte load-balanced router( dialog duration =
session ) to intelligently route incoming HTTPRequests to one of these
replicated partitions. The router would look at the some tag on the session
and then route the request to one of these replicated "client clone" using
the tag. Successive requests from the same client will go to the same
replicated partition so that you can use the client-cache or any other
per-user services.
The advantages of this approach are
1) You can continue to make use of caching and other user-level components
that you may have.
2) The web and classic Forte clients can work seamlessly if you write them
to use reference partitions that hosts the other shared( Environment visible
) service objects.
Ofcourse you will have to write ( and maintain )the custom-routing code and
also pay attention to house-keeping. For example, the burdon of cleaning up
the cache on logout or session expiration lies on you. If you don't do this,
then your new user might be looking at an old cache of some other user.
Hope this helps,
Ajith
Forte Systems Consultant.
Subject: (forte-users) Web enterprise & user visible service objects
Hi
We have taken a forte application and converted it to run on the web using
* forte web enterprise &
* fortecgi.exe
In the forte application we have a user visible Local Cache Manager
Service Object (i.e. each users has their own copy) for storing things
like
* the details of the current user id
* the details of the current client chosen
* arrays that are needed by other windows
With web enterprise this service object is no longer user visible, how can
we make it user visible?
Thanks in advance.
Deborah Wallis
dwallisnbs.co.za
WARNING:
Any unauthorised use or interception of this email is illegal. If this email
is not intended for you, you may not copy, distribute nor disclose the
contents to anyone. Save for bona fide company matters, the BoE Group does
not accept any responsibility for the opinions expressed in this email.
For further details please see: http://www.nbs.co.za/emaildisclaim.htm
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.comA few months ago we faced a similar problem while migrating from classic
Forte to Web. We had to protect our investment in various frameworks that we
wrote for the classic Forte apps, which made use of extensive
user-level-caching among other things.
We solved the problem using a custom routing mechanism. In brief, we created
several( replicated) server partitions that contains all the user-level
Service objects that existed in the class-Forte apps. Then we wrote a
'custom-router' which mimics Forte load-balanced router( dialog duration =
session ) to intelligently route incoming HTTPRequests to one of these
replicated partitions. The router would look at the some tag on the session
and then route the request to one of these replicated "client clone" using
the tag. Successive requests from the same client will go to the same
replicated partition so that you can use the client-cache or any other
per-user services.
The advantages of this approach are
1) You can continue to make use of caching and other user-level components
that you may have.
2) The web and classic Forte clients can work seamlessly if you write them
to use reference partitions that hosts the other shared( Environment visible
) service objects.
Ofcourse you will have to write ( and maintain )the custom-routing code and
also pay attention to house-keeping. For example, the burdon of cleaning up
the cache on logout or session expiration lies on you. If you don't do this,
then your new user might be looking at an old cache of some other user.
Hope this helps,
Ajith
Forte Systems Consultant.
Subject: (forte-users) Web enterprise & user visible service objects
Hi
We have taken a forte application and converted it to run on the web using
* forte web enterprise &
* fortecgi.exe
In the forte application we have a user visible Local Cache Manager
Service Object (i.e. each users has their own copy) for storing things
like
* the details of the current user id
* the details of the current client chosen
* arrays that are needed by other windows
With web enterprise this service object is no longer user visible, how can
we make it user visible?
Thanks in advance.
Deborah Wallis
dwallisnbs.co.za
WARNING:
Any unauthorised use or interception of this email is illegal. If this email
is not intended for you, you may not copy, distribute nor disclose the
contents to anyone. Save for bona fide company matters, the BoE Group does
not accept any responsibility for the opinions expressed in this email.
For further details please see: http://www.nbs.co.za/emaildisclaim.htm
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com -
RE: (forte-users) Call to the load-balanced SO not throughrouter
We never call an SO from within an SO. Instead we do the following :
MySO is mapped to MySOclass.
MySOclass is a facade which has an attribute for every Policy Manager
related to this SO.
Each Policy manager is instanciated in MySOclass.
Each Policy manager has an attribute called Parent.
Parent is defined by MySOclass to be self.
If two Policy managers need to work together we invoke methods via the
parent attribute :
Example
I have a partition for Enrolments.
It has three Policy Managers within it
a Students Policy Manager (with a Add, Delete, Get methods)
a Courses Policy Manager (with a Add, Delete, Get methods).
an Enrolments Policy Manager (with a Add, Delete, Get methods).
To enable this partition we have defined :
EnrolmentsSO (environment visible, message duration) with the EnrolmentsMgr
class as its related class.
The EnrolmentsMgr class has the following methods and attributes :
Methods :
AddStudent
AddCourse
AddEnrolment
GetStudent
GetCourse
GetEnrolment
DeleteStudent
DeleteCourse
DeleteEnrolment
All of these methods do a one line return statement, simply passing the
method invocation to
the appropriate Policy Manager. For example AddStudent would say
Return theStudentPM.AddStudent(pInStudentParams : pInStudentParams)
: pOutStudentParams
In the Init method for the EnrolmentsMgr we instanciate the following
attributes :
theStudentPM (which is typed to the StudentPM class)
theCoursePM (which is typed to the CoursePM class)
theEnrolmentsPM (which is typed to the EnrolmentsPM class)
Also in the Init method we set an attribute (called parent) on each
PM to the value of Self.
Then when one PM needs to invoke a method on another PM we simply do :
For example in the theEnrolmentPM.GetEnrolment method we need to get
Students and Courses
thus we code :
Parent.GetStudent(pInStudentParams = pInStudentParams) : pOutStudentParams
Parent.GetCourse((pInCourseParams = pOutStudentParams.CourseStuff) :
pOutCourseParams
Build Enrol details based on student / course stuff.
Return EnrolmentParams.
Hope this makes sense.
Regards,
Chris Will, Dept. of Educ. Training, ITB, Sydney, Australia
-----Original Message-----
From: Peter Sham [mailto:[email protected]]
Sent: Friday, 8 October 1999 9:35
To: [email protected]; [email protected]
Subject: Re: (forte-users) Replicating the PersistenceMgrSO
Hi,
Whenever you make a call to your load-balanced SO, it
would go through the router. That is what I
understand. No matter you make the call from inside
or outside the SO.
Secondly, you can turn on the "fail-over" option of a
router but not load-balanced it. On these routers,
you can check their instruments to see which one is
really running.
Hope this help.
Regards,
Peter Sham.We never call an SO from within an SO. Instead we do the following :
MySO is mapped to MySOclass.
MySOclass is a facade which has an attribute for every Policy Manager
related to this SO.
Each Policy manager is instanciated in MySOclass.
Each Policy manager has an attribute called Parent.
Parent is defined by MySOclass to be self.
If two Policy managers need to work together we invoke methods via the
parent attribute :
Example
I have a partition for Enrolments.
It has three Policy Managers within it
a Students Policy Manager (with a Add, Delete, Get methods)
a Courses Policy Manager (with a Add, Delete, Get methods).
an Enrolments Policy Manager (with a Add, Delete, Get methods).
To enable this partition we have defined :
EnrolmentsSO (environment visible, message duration) with the EnrolmentsMgr
class as its related class.
The EnrolmentsMgr class has the following methods and attributes :
Methods :
AddStudent
AddCourse
AddEnrolment
GetStudent
GetCourse
GetEnrolment
DeleteStudent
DeleteCourse
DeleteEnrolment
All of these methods do a one line return statement, simply passing the
method invocation to
the appropriate Policy Manager. For example AddStudent would say
Return theStudentPM.AddStudent(pInStudentParams : pInStudentParams)
: pOutStudentParams
In the Init method for the EnrolmentsMgr we instanciate the following
attributes :
theStudentPM (which is typed to the StudentPM class)
theCoursePM (which is typed to the CoursePM class)
theEnrolmentsPM (which is typed to the EnrolmentsPM class)
Also in the Init method we set an attribute (called parent) on each
PM to the value of Self.
Then when one PM needs to invoke a method on another PM we simply do :
For example in the theEnrolmentPM.GetEnrolment method we need to get
Students and Courses
thus we code :
Parent.GetStudent(pInStudentParams = pInStudentParams) : pOutStudentParams
Parent.GetCourse((pInCourseParams = pOutStudentParams.CourseStuff) :
pOutCourseParams
Build Enrol details based on student / course stuff.
Return EnrolmentParams.
Hope this makes sense.
Regards,
Chris Will, Dept. of Educ. Training, ITB, Sydney, Australia
-----Original Message-----
From: Peter Sham [mailto:[email protected]]
Sent: Friday, 8 October 1999 9:35
To: [email protected]; [email protected]
Subject: Re: (forte-users) Replicating the PersistenceMgrSO
Hi,
Whenever you make a call to your load-balanced SO, it
would go through the router. That is what I
understand. No matter you make the call from inside
or outside the SO.
Secondly, you can turn on the "fail-over" option of a
router but not load-balanced it. On these routers,
you can check their instruments to see which one is
really running.
Hope this help.
Regards,
Peter Sham. -
Re: (forte-users) Unstable server ENV after upgrade to Forte30M2.
I see/suggest a few things:
1) In your #1, you mention ".... development and test environments which use the
same Forte 3M installs through links ...". This concerns me. On our UNIX box
each environment has it's own directory containing it's own install. If your
environments are some how sharing a node manager, log directory or processes (to
name a few things) that is a recipe for disaster. They may be competing for
resources and usually the first one started will win.
2) I haven't done a lot with compatibility levels, but if an application built
in dev is to run in test it may be important that node managers and services
(autocompile, codegen etc.) be at the same level (????).
3) Check the definition files, to make sure the two environments operate
independently. If they are both trying to write to the same log file the one
started up first will work while the second will not as the file will be "busy".
4) We usually use rpcreate (newer version) to create brand new repositories.
Than we export/import the source code that we need. Also it is important to
force compile ALL plans in a workspace at least once after doing the import.
This will ensure that all of the code is "speaking the same language". The other
compile, only compiles those pieces of code that changed from the last compile.
Hope this helps.
Kelsey PetrychynSaskTel Technical Analyst
ITM - Technology Solutions - Distributed Computing
Tel (306) 777 - 4906, Fax (306) 359 - 0857
Internet:kelsey.petrychynSasktel.sk.ca
Quality is not job 1. It is the only job!
"Braja Chattaraj" <forte_brajachotmail.com> on 09/13/2000 03:43:57 PM
Please respond to chattaraj_braja_NONLILLYlilly.com
To: forte-userslists.xpedior.com
cc: (bcc: Kelsey Petrychyn/SaskTel/CA)
Subject: (forte-users) Unstable server ENV after upgrade to Forte 30M2.
We are running Forte 3M2 clients and server in our test environment with
clients on NT and server on Solaris 2.6. Eversince the upgrade from 3L to 3M
we have been having an unstable environment that does not remain alive for >
10 mins. These are the details of the Forte installs and server setups :
1. The server hosts the development and test environments which use the same
Forte 3M installs through links (same ftcmd, ftexec, nodemgr, etc.). The
environments are at compatibility levels 0 and 1 respectively.
2. The two environments have the same definition files (defining the ENV
variables), though seperate copies and the two environments are hosted on
different ports on the same server.
3. While building the new 3M environmnets in DEV and TST, we exported the
old 3L repositories and imported them into the new 3M repositories and
deployed the applications.
While the DEV environment is stable the TST environment is not. This has
been observed while moving plans between the environments (export and
import) using fscript commands, deploying the apps after the move using
fscript, and testing the apps. Sometimes it has come down right after a
startup. There is no programatic reference to the environment agent in the
code. So, a programatic shutdown is ruled out.
Does anybody have a clue or a similar experience ?
Thanks.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BRAJA KISHORE CHATTARAJ
Consultant, Analysts International.
Work : Sphinx Pharmaceuticals (A division of Eli Lilly & Co.)
(919) 314-4134
Home : 1801, Williamsburg Rd., #41H, Durham, NC 27707.
(919) 463-7802
E-mail : forte_brajachotmail.com
Visit us www.analysts.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
http://profiles.msn.com.
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.comWe found a solution to our issue.Their desktops were in a lockdown environment and the essbase.id file located in the windows directory was locked as well. This file is responsible for assigning ports etc and it couldn't be updated for the 6.5.4p2 upgrade. Once the file was deleted and the user reconnected to Essbase, the essbase.id was reset and they could connect.
-
Re: (forte-users) Round-trip database design
We have used Erwin quite sucessfully, but it's not cheap.
"Rottier, Pascal" <Rottier.Pascalpmintl.ch> on 02/15/2001 04:51:01 AM
To: 'Forte Users' <forte-userslists.xpedior.com>
cc:
Subject: (forte-users) Round-trip database design
Hi,
Maybe not 100% the right mailing list but it's worth a try.
Does anyone use tools to automatically update the structure of an existing
database?
For example, you have a full database model (Power Designer) and you've
created a script to create all these tables in a new and empty database.
You've been using this database and filling tables with data for a while.
Now you want to do some marginal modifications on these tables. Add a
column, remove a column, rename a column, etc.
Is there a way to automatically change the database without losing data and
without having to do it manually (except the manual changes in the (Power
Designer) model).
Thanks
Pascal Rottier
Atos Origin Nederland (BAS/West End User Computing)
Tel. +31 (0)10-2661223
Fax. +31 (0)10-2661199
E-mail: Pascal.Rottiernl.origin-it.com
++++++++++++++++++++++++++++
Philip Morris (Afd. MIS)
Tel. +31 (0)164-295149
Fax. +31 (0)164-294444
E-mail: Rottier.Pascalpmintl.ch
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.comHello Pascal,
Forte has classes which might be able to scan the database structure
(DBColumnDesc,etc.). Express use this classes to determine how the
BusinessClass looks like. We use Forte to create the tables,indexes and
constraints. We have the Problem that the above described classes are only
readable but not fillable. The solution for us will be to create our own
classes in
the same manner than existing classes are. So we are able to make updates in
the database structure and maybe able to change the database tables with tool
code. Another reason for us to have the database structure in the
application is the
ability to see the table structure on which the Forte code works always up
to date
with the code. You are always able to compare the structure of the database
with
your businessclasses and able to convert a wrong structure to the correct
structure
with maybe just a little piece of code.
Hope this helps
Joseph Mirwald -
FW: (forte-users) Copy Input parameter
Peter,
That is the behaviour that I have experienced also, so I do not have such
(anchored service object) attributes in my classes anymore but instead add
that service object attribute as an input parameter to all methods in that
class that require access via that service object attribute.
Alternatively, if access to that anchored service object is only required
in the partition that it was created then overriding the Clone method of
the class to return a NIL value in the service object attribute should
work for you.
Mario Emmi
British Aerospace Australia
-----Original Message-----
From: Peter Sham [SMTP:[email protected]]
Sent: Thursday, 28 October 1999 05:33
To: Forte User Group
Subject: (forte-users) Copy Input parameter
Hi folks,
I have this problem where a "copy input" seems to copy
the service object too.
The case is that I have a service object, say
batchmgrso, for batch processing and an object, say
batchproc, as the process. The batchproc has an
attribute for referencing the batchmgrso as it will
create some other process and submit it to the
batchmgrso.
The problem is whenever a batchproc fails and the
batchmgrso tries to re-submit the object from the
queue, and I use a copy input as the mechanism for
passing in the batchproc to the service object, I can
find that not only does the batchproc get cloned, but
also the batchmgrso. It caused a lot of problem and
bombed the method.
When I changes the mechanism to just input in the
method signature, everything works fine.
So is it a forte feature/bug that a copy input would
clone something so "deeply" that even a SO or archored
object would get clone too. Is there any way to avoid
it?
Regards,
Peter Sham.
=====
For the archives, go to: http://lists.sageit.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: [email protected]Peter,
That is the behaviour that I have experienced also, so I do not have such
(anchored service object) attributes in my classes anymore but instead add
that service object attribute as an input parameter to all methods in that
class that require access via that service object attribute.
Alternatively, if access to that anchored service object is only required
in the partition that it was created then overriding the Clone method of
the class to return a NIL value in the service object attribute should
work for you.
Mario Emmi
British Aerospace Australia
-----Original Message-----
From: Peter Sham [SMTP:[email protected]]
Sent: Thursday, 28 October 1999 05:33
To: Forte User Group
Subject: (forte-users) Copy Input parameter
Hi folks,
I have this problem where a "copy input" seems to copy
the service object too.
The case is that I have a service object, say
batchmgrso, for batch processing and an object, say
batchproc, as the process. The batchproc has an
attribute for referencing the batchmgrso as it will
create some other process and submit it to the
batchmgrso.
The problem is whenever a batchproc fails and the
batchmgrso tries to re-submit the object from the
queue, and I use a copy input as the mechanism for
passing in the batchproc to the service object, I can
find that not only does the batchproc get cloned, but
also the batchmgrso. It caused a lot of problem and
bombed the method.
When I changes the mechanism to just input in the
method signature, everything works fine.
So is it a forte feature/bug that a copy input would
clone something so "deeply" that even a SO or archored
object would get clone too. Is there any way to avoid
it?
Regards,
Peter Sham.
=====
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the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: [email protected]
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