IIOP and Java 2.0

Has anyone had any success connecting a client written using Java 2.0 and
the Java 2.0 ORB classes, to a Forte Service Object?
When I try the approach taken in the Forte tutorial (Tech Note 10950), a
security exception is raised. See following:
C:\Projects\SkunkWorks\CE\IDLGen>java CEClient ce.ior
Exception in thread "main" java.lang.SecurityException: ORBSingleton: access
denied
at
com.sun.CORBA.idl.ORBSingleton.string_to_object(ORBSingleton.java:229)
at CEClient.main(CEClient.java:80)
When I try the approach taken in the Java tutorial, the NameService cannot
be resolved. See following:
C:\Projects\SkunkWorks\ForteDemo\IDLGen>java castaxc
ERROR : org.omg.CORBA.COMM_FAILURE: minor code: 1 completed: No
org.omg.CORBA.COMM_FAILURE: minor code: 1 completed: No
at com.sun.CORBA.iiop.ConnectionTable.get(Compiled Code)
at com.sun.CORBA.iiop.GIOPImpl.createRequest(GIOPImpl.java:78)
at com.sun.CORBA.iiop.GIOPImpl.createRequest(GIOPImpl.java:62)
at
com.sun.CORBA.idl.GenericCORBAClientSC.createRequest(GenericCORBAClientSC.ja
va:138)
at
com.sun.CORBA.idl.InitialNamingClient.resolve(InitialNamingClient.java:194)
at
com.sun.CORBA.idl.InitialNamingClient.cachedInitialReferences(InitialNamingC
lient.java:275)
at
com.sun.CORBA.idl.InitialNamingClient.resolve_initial_references(InitialNami
ngClient.java:184)
at com.sun.CORBA.idl.ORB.resolve_initial_references(ORB.java:1098)
at castaxc.main(castaxc.java:24)
Thanks, in advance
Perry Everitt
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Forte, iiop, and java 2 woes

We are running Forte 3L2, and Java 2. We'd like to make calls to a forte SO
from a Java client. We can configure the SO for export, and find the ior
file.
However, the java side never seems to work. The idl compiler for JDK 1.2.x
(idltojava, downloaded from SUN) gives lots syntax errrors, these appear
without explanation on apparently good lines. The compiler for JDK 1.3.0
(idlj) only complains about some errors coming from a escaped strings, which
I can patch around.
The java files resulting from idlj need some minor patching/renaming to
compile (Had to put some of the primitive class helpers into Framework
project manually). And then, they fail at runtime. They fail with a null
object error when run in the 1.3.0 runtime. They fail with the same CORBA
exception when run in either the JDK 1.2.2 runtime, or the naturalbridge
native java compiled runtime.
Does anybody have a specific combination of Java 2 jvm and idl compiler
which will work with Forte? Were any specific tricks needed to make it
work? I tried the technotes, but those that I found seemed out of date for
Java 2.

If you look at the exception information in the iiop manual it
discusses exteneded propties DefaultThrowsClause, ThrowsClause and
IsThrowable.
If you mark your exception class with IsThrowable it will show up in the
IDL as an exception. If you use either DefaultThrowsClause(project) or
ThrowsClause(method) you will get the appropriate raises in the idl.
This will cause the idl2java to produce code which will allow you to catch
the exception.
Tom.
At 09:41 AM 1/29/99 +0100, Giuseppe Sorce wrote:
>
Hi all,
I am currently working to an architecture to establish a communication
between a Forte' server and a Java client, using Visigenic's Visibroker and
IDL mode.
I have problems when I try to raise a Forte' exception from a method
invoked by the Java client; I would like the exception class
(ProductException) not to inherit from the class GenericException, because
the IDL I want to generate must have this structure:
exception ProductException {
string message;
Using this solution, the client application gets blocked waiting forever.
I am currently working with:
- Forte' 3.0.G.2 plus WebEnterprise 1.0.B
- JDK 1.1.5
- Visibroker 3.1
My question is: is it possible to raise an exception from the Forte' side
that is
compliant to the IDL mentioned above?
Of course it should be caught from the Java side.
Thank you in advance
Giuseppe Sorce
CSI Piemonte - C.so Unione Sovietica 216 - 10134 Torino - ITALY
tel. +39-011-3168736
fax +39-011-3168212
e-mail [email protected]
url http://www.csi.it
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Forte IIOP / Corba / Java more questions...

Hi,
I wonder if any Forte / IIOP / Java people can help...
We are a Forte site developing an application using the Forte Web SDK (
window converter / Javascript etc ) and using the Forte external connection
class to enable direct communication between Fort Service objects and Java
applets. We are considering using Corba / IIOP for Java <-> Forte comms but
I could use some advice.
Has anyone compared data transfer rates for Forte client <-> Forte remote
service object vs Java IIOP client to Forte IIOP Service object ( all
across the same LAN ) ? There are of course many factors that might
influence data transfer speeds - but any info would be appreciated. I
really just want to know IIOP communication rates differ from those handled
end-to-end by Forte.
Secondly, does anyone know about scalability of the Forte IIOP Gateway or
Forte IIOP listeners - how many simultaneous IIOP connections can be
supported ?
Thirdly, does anyone know if there are memory limitations for applets
running in browsers - can an applet request additional memory - or is it
simply part of the browsers overall allocation ( important for the Mac
platform ? )
Finally, has anyone used OrbixWeb as the IIOP Java client - experiences,
warnings etc. appreciated.
Cheers - Dave.
Dave Maclaurin, ITS, University of Otago, Dunedin, New Zealand
mailto:[email protected]
Ph (03) 4798530

Hi,
I wonder if any Forte / IIOP / Java people can help...
We are a Forte site developing an application using the Forte Web SDK (
window converter / Javascript etc ) and using the Forte external connection
class to enable direct communication between Fort Service objects and Java
applets. We are considering using Corba / IIOP for Java <-> Forte comms but
I could use some advice.
Has anyone compared data transfer rates for Forte client <-> Forte remote
service object vs Java IIOP client to Forte IIOP Service object ( all
across the same LAN ) ? There are of course many factors that might
influence data transfer speeds - but any info would be appreciated. I
really just want to know IIOP communication rates differ from those handled
end-to-end by Forte.
Secondly, does anyone know about scalability of the Forte IIOP Gateway or
Forte IIOP listeners - how many simultaneous IIOP connections can be
supported ?
Thirdly, does anyone know if there are memory limitations for applets
running in browsers - can an applet request additional memory - or is it
simply part of the browsers overall allocation ( important for the Mac
platform ? )
Finally, has anyone used OrbixWeb as the IIOP Java client - experiences,
warnings etc. appreciated.
Cheers - Dave.
Dave Maclaurin, ITS, University of Otago, Dunedin, New Zealand
mailto:[email protected]
Ph (03) 4798530

Forte' and Java IOOP in mission criticalapplications.

Hi,
Has anybody had any experience in the development of Java/IIOP/Forte'
applications in large scale, mission critical, environments?
We've developped a full function prototype application and it looks as if
the Forte' IIOP listener could easily become a bottleneck in the overall
architecture configuration: infact we think it is not possible to configure
it for load balancing and/or failover and that any solution in this field
should be carried out outside Forte'.
Any ideas/comments?
Thanks a lot,
Ernesto Moscatelli
SEMAGROUP Italy
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Hi
I've been playing with a variation of the custom router you describe below to
avoid having my server side partitions being pulled onto my client.
Essentially each of my server side partitions registers themselves with a
router set up to service that particular partition. The "clients" then request
a reference to the server side partition from the custom router. This
reference is then used to invoke the services provided by my server side
partitions.
On the box I am testing (RS 6000) my custom router (performing round robin
routing) is between 90ms and 100ms slower the Forte's own router. However,
since my server side partition can be multi-threaded as soon as there are more
tasks requiring the service than there are partitions I start to see a
performance improvement.
While I was testing this (and a few other things) I noticed that it seemed to
be awfully easy to flood a Forte partition (running Forte threads) with tasks
(around 8 as far as I could tell) to the point where the partition seems to
spend all of its time servicing the threads rather than doing any real work.
Does anyone know at what number of tasks the Forte threading model breaks down?
Or, if there are any ways of controlling the "thread processing time".
Cheers,
Darren
From: Scott Irwin <[email protected]>
To: 'Peter Sham (HTHK - Assistant Manager - Software Development, IITB)'<[email protected]>; [email protected]
Cc: [email protected]
Subject: RE: Forte' and Java IOOP in mission critical applications.
Date: 23 March 1999 13:44
We are implementing a Java Bean which communicates via IIOP to our SO. We
didn't like forte's router so we developed a custom 'Intelligent' router.
The Bean first resolves the CustomerRouterSO. The CustomerRouterSO is set
for only Fail-Over. Our real SO that does all of the work is our
ReplicateSO which is load balanced and registers with the CustomerRouterSO.
The CustomRouterSO does not hold state in case it fails. ReplicateSO know
(based on env) if they are primary or secondary type SO and tell the
CustomRouterSO.
In the CustomRouterSO you can add any type of logic you need to determine
which ReplicateSO you want to assign back from the connect(). In our case,
each ReplicateSO keeps a count of the number of clients assigned, and the
CustomRouterSO asks the ReplicateSO if it can handle another assignment.
We needed this type of behavior because our objects are chockfull of state.
If you need Message type duration then it's another game. We are heading
into Stress Test in a few weeks so we will see if this will fly.
Have Fun!
Scott Irwin
-----Original Message-----
From: Peter Sham (HTHK - Assistant Manager - Software Development,
IITB) [SMTP:[email protected]]
Sent: Tuesday, March 23, 1999 4:38 AM
To: [email protected]
Cc: [email protected]
Subject: RE: Forte' and Java IOOP in mission critical
applications.
Hi,
I'm not expert on this field, but if the configuration is like this,
should
this load-balance/failover responsibility be on the shoulder of the
COBRA
ORB, instead on Forte?
Peter Sham.
-----Original Message-----
From: [email protected]
[SMTP:[email protected]]
Sent: Tuesday, March 23, 1999 4:57 PM
To: [email protected]
Subject: Forte' and Java IOOP in mission critical
applications.
Hi,
Has anybody had any experience in the development of
Java/IIOP/Forte'
applications in large scale, mission critical, environments?
We've developped a full function prototype application and
it looks
as if
the Forte' IIOP listener could easily become a bottleneck in
the
overall
architecture configuration: infact we think it is not
possible to
configure
it for load balancing and/or failover and that any solution
in this
field
should be carried out outside Forte'.
Any ideas/comments?
Thanks a lot,
Ernesto Moscatelli
SEMAGROUP Italy
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<URL:http://pinehurst.sageit.com/listarchive/>
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Difference between RMI-IIOP and CORBA-IIOP

Hello,
What is the difference between RMI-IIOP and CORBA-IIOP?
Thanks
Larry

Lawrence Manickam <[email protected]> writes:
What is the difference between RMI-IIOP and CORBA-IIOP? RMI-IIOP is the protocol represented by the mapping of Java RMI
artifacts to IDL, i.e. you start with Java and use the RMI programming
model. CORBA / IIOP is really just the protocol used for IDL sourced
objects, i.e. you start with IDL and use the CORBA programming model.
andy

WebEnterprise - HTML Editors and Java

I'd like to know any opinions on HTML editors and their use with
WebEnterprise. Have any of you done
evaluations to determine the best editor to use with the Forte product? Also,
do you have experience using
a Java applet as the front-end to a Forte service object? In this instance,
are you able to do so with Forte 30f2 and
WebSDK?
Thanks,
Peggy Adrian
Eli Lilly and Company

Peggy,
FrontPage 97 / 98 have both worked really well for us, however we
discovered a slight hitch with 98 where the Editor would gobble up
<?FORTE ..> tags inside the SELECT OPTION tag, but you can work around
that one, apart from this FP98 is a great HTML editor. I also thought
HotMetal was a good fit.These observations come out of evaluating about
5-6 leading HTML editors.
Some recommended steps in the process:
1) Create a prototype by laying out all the HTML using an Editor. Figure
out all the navigation within your web. More recent features seen in
HTML editors such as JavaScript generation and DHTML / CSS support are
really difficult to work out on your own, let the advanced Editors do as
much dirty work for you as poss.
2) Once the prototype is finalized, for all the pages requiring any
dynamic content generation, figure out all the Tag Handlers you will
need. Change the HTML Content by inserting the FORTE tags as required,
code the corresponding Handlers.
3) Figure out the relation between page requests and the security
requirements for your pages, design the Session properties and data
tracing across requests using the Session object.
4) Do refer to all the Tech Notes on the Forte web site for known
issues.
As for the Java applets frontend, we have used Java - IIOP - Forte since
early beta through every Forte release (3.0.X) and it works fine with
WebEnterprise and release 30f2.
- Sameer
From: Peggy Lynn Adrian <[email protected]>
Date: Wed, 07 Jan 1998 15:19:58 -0500
Subject: WebEnterprise - HTML Editors and Java
I'd like to know any opinions on HTML editors and their use with
WebEnterprise. Have any of you done
evaluations to determine the best editor to use with the Forte
product? Also,
do you have experience using
a Java applet as the front-end to a Forte service object? In this
instance,
are you able to do so with Forte 30f2 and
WebSDK?
Thanks,
Peggy Adrian
Eli Lilly and Company

Whats is difference between Java JRE and Java SDK

Hi,
what is the difference between Java JRE and Java SDK...
i think both of them have the same set of files to be installed...
I am not able to understand where they differ

The JRE (Java runtime Environment) contains just the stuff necessary to run Java and the SDK (System Development Kit) contains the extra stuff necessary (and also helpful) to develop in Java.

What is difference between C# Gzip and Java swing GZIPOutputStream?

Hi All,
I have a Java swing tool where i can compress file inputs and we have C# tool.
I am using GZIPOutputStream to compress the stream .
I found the difference between C# and Java Gzip compression while a compressing a file (temp.gif ) -
After Compression of temp.gif file in C# - compressed file size increased
while in java i found a 2% percentage of compression of data.
Could you please tell me , can i achieve same output in Java as compared to C# using GZIPOutputStream ?
Thank a lot in advance.

797957 wrote:
Does java provides a better compression than C#?no idea, i don't do c# programming. and, your question is most likely really: "does java default to a higher compression level than c#".
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What is the diffrence between package javax.sql and java.sql

Is javax designed for J2EE?
And when to use package javax?

Hi,
What is the diffrence between package javax.sql and java.sql?The JDBC 2.0 & above API is comprised of two packages:
1.The java.sql package and
2.The javax.sql package.
java.sql provides features mostly related to client
side database functionalities where as the javax.sql
package, which adds server-side capabilities.
You automatically get both packages when you download the JavaTM 2 Platform, Standard Edition, Version 1.4 (J2SETM) or the JavaTM 2, Platform Enterprise Edition, Version 1.3 (J2EETM).
For further information on this please visit our website at http://java.sun.com/j2se/1.3/docs/guide/jdbc/index.html
Hope this helps.
Good Luck.
Gayam.Srinivasa Reddy
Developer Technical Support
Sun Micro Systems
http://www.sun.com/developers/support/

What is the diffrence between My Runnable Interface and Java Runnable

Hi folks
all we know that interfaces in java just a decleration for methods and variables.
so my Question is why when i create an interface its name is "Runnable" and i declared a method called "run" inside it.then when i implements this interface with any class don't do the thread operation but when i implement the java.lang.Runnable the thread is going fine.
so what is the diffrence between My Runnable Interface and Java Runnable?
thnx

Hi folks
all we know that interfaces in java just a decleration
for methods and variables.
so my Question is why when i create an interface its
name is "Runnable" and i declared a method called
"run" inside it.then when i implements this interface
with any class don't do the thread operation but when
i implement the java.lang.Runnable the thread is going
fine.
so what is the diffrence between My Runnable Interface
and Java Runnable?
thnxClasses and interfaces are not identified by just their "name", like Runnable. The actual "name" the compiler uses is java.lang.Runnable. So even if you duplicate the Runnable interface in your own package, it's not the same as far as the compiler is concerned, because it's in a different package.
Try importing both java.util.* and java.awt.* (which both have a class or interface named List), and then try to compile List myList = new ArrayList();

Java SE and Java EE

I am a IT graduate and I still need some clarification on the relationship between Java SE and Java EE API. Does EE include SE?
For application development, I know I can use only SE without the EE, but can I use EE alone without SE?
Any good articles addressing my questions?
Thank you very much
R

Java EE in fact extends java SE, its primarily aim is to simplify developing multitier enterprise applications (Java SE provides all the necessary basic libraries etc.)
Because Java EE is an extension of Java SE, you cant use EE without SE - without SE there is no EE.

SSO between Portal and Java WD application

Hi Experts,
I am using CE 7.2 on localhost and I am very new to SAP.
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> need to know how can I get SSO between Portal and Java WD.
Then I suggest you ask your question in the Web Dynpro Java forum instead of the Web Dynpro ABAP one.

J2me and java card, need help to communicate

we are trying to put together a reader to read smartcards using j2me and we figure that it would be easiest if we could develop it to work with java cards rather than standard smart cards, the problem is we get garbage when we communicate to it, the chip sends us crap, any suggestions what might be wrong, any calls we might be missing, has anyone worked with j2me and java cards or smart cards, any help would be appreciated.
einar

.... reader app and the ME behind it .... smells like mobile ....
First of all - if you want to have one mobile application running on this just make sure that whatever is written in ME can use drivers from the reader chip ....
Workin on the PC is something completely different. There was one good example how to develop one host application in Java provided with the JCOP tools long ago ... I don't know if this is now in the new Eclipse tools.
But - there was a small API provided that can give you good hints what to do - and - once you have it on the reader side - you can easily integrate ME methods with this ...

Eclipse 3.4 and Java 6 compatibility

Hi All,
I have a tomcat plugin inside Eclipse 3.4.2. Recently I upgraded from Java 5 to Java 6. When I try to start Tomcat from Eclipse,I get the following error:
Error occurred during initialization of VM
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     at sun.net.www.ParseUtil.<clinit>(ParseUtil.java:559)
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     at java.security.AccessController.doPrivileged(Native Method)
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     at sun.misc.Launcher.<clinit>(Launcher.java:39)
     at java.lang.ClassLoader.initSystemClassLoader(ClassLoader.java:1304)
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Kindly suggest what needs to be done? If I am posting it in a wrong forum please suggest me the right one too.
I would like to know if Eclipse 3.4 and Java 6 are compatible or not.
Thanks in advance.

ShubhaPradeep wrote:
I have a tomcat plugin inside Eclipse 3.4.2. Recently I upgraded from Java 5 to Java 6. When I try to start Tomcat from Eclipse,I get
Error occurred during initialization of VM
java.lang.UnsatisfiedLinkError: java.lang.Float.floatToIntBits(F)IAre we talking 64-bit Linux?
I had issues launching eclipse on CentOS 5 64-bit and Sun JDK 1.6,
resolved by launching eclipse with the -vm option specifying Sun JDK 1.5 java.
[https://www.centos.org/modules/newbb/viewtopic.php?post_id=95784&topic_id=11661]

Problem with win2000sp3 and Java web start

I have JRE and Java web start (1.2.0_01, build b01) which come downloading file j2re-1_4_1_01-windows-i586-i.exe from sun.
I have win2000pro running on my PC.
I had updated win2000 to service pack 2 and everything was fine.
Now i decided to update to service pack 3 (in the process I also updated other components) from Microsoft and:
1) Java applets seem to be running fine within i.e.
2) If i try to run an application from java web start my PC freezes and I have to restart it.
3) Staroffice 6.0, which runs on Java, seems to be fine.
I reinstalled both sp3 and jre etc, with no result.
Is this a known problem?
Thanks to all.
Maurizio

I suspect that you have hit a known problem with Swing on Java 1.4.1 with buggy video drivers. Do you have an ATI card? They are the worst offenders. ATI released new drivers for its Radeon line today. They fix the problem.

IIOP and Java 2.0

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