Large Number of Smart Classes

Forms [32 Bit] Version 6.0.8.15.0 (Production)
If we have more than about 60 different Smart Classes for, say, text items set up in an Object Library, at design time, right-clicking on the item brings up the Smart Class list but it won't fit on the screen.
No scroll bars appear on the list, nor ellipsis (...) entries to allow them to be seen. They can be selected with the arrow keys, but you cannot see them.
Is there any way of grouping the Smart Classes (i.e. producing some form of tear-off menu for the Smart Class list)?
Thanks in advance
Nige

KrummenHacker wrote:
I have exactly the same problem and even deauthorizing and then authorizing the computer again doesn't help to solve this.
It happen just after I upgraded iTunes to 8.1.
Since that, I'm not able any more to launch any application installed from the AppStore. Native applications and custom applications installed from Xcode are working without any problem.
I also tried to purchase a new application to see what happen. Result: it doesn't launch.
Bernard
Did you purchase the application in iTunes on your Mac and then sync it to the iPhone?
If not, try walking through the process I suggested above.
If you did purchase the application in iTunes and sync it to the iPhone after deauthorizing and authorizing, try updating the iPhone to 2.2.1 or restoring the iPhone as shown here: This article: http://support.apple.com/kb/HT1414 will walk you through restoring an iPhone or iPod touch.
-Jason

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Status and messaging for systems with a large number of classes

Very common dilemma we coders face when creating
systems involving a large number of classes:
Any standard framework to take care of the global status of the whole application and of gui subsystems
for both status handling and report messages to users?
Something light if possible...and not too much threads.

Ah, I see,
I found JPanel with CardLayout or a JTabbedPane very good for control of several GUI in an application - as alternative organization tool I use a JTree, which is used for both, selecting and organizing certain tasks or data in the application - tasks are normally done with data associated with them (that is, what an object is for), so basically a click onto a node in this JTree invokes an interface method of that object (the userObject), which is associated with this node.
Event handling should be done by the event-handling-thread only as far as possible - it is responsible for it so leave this job to it. This will give you control over the order in which the events are handled. Sometimes it needs a bit more work to obey this rule - for example communication coming from the outside (think of a chat channel for example) must be converted to an event source driven by a thread normally. As soon as it is an event source, you can leave it's event handling to the event handling thread again and problems with concurrent programming are minimized again.
It is the same with manipulating components or models of components - leave it to the event handling thread using a Runnable and SwingUtilities.invokeLater(Runnable). This way you can be sure that each manipulation is done after the other in the order you have transferred it to the event handling thread.
When you do this consequently most of your threads will idle most of the time - so give them a break using Thread.sleep(...) - not all platforms provide preemptive multitasking and this way it is garanteed, that the event handling thread will get a chance to run most of the time - which results in fast GUI update and fast event handling.
Another thing is, that you should use "divide and conquer" also within a single GUI panel - place components in subpanels and transfer the responsibility for the components in this panel to exactly these subpanels - think of a team manager which makes his employees work together. He reports up to his super manager and transfers global order from his boss into specific tasks by delegation to the components, he is managing. If you have this in mind, when you design classes, you will have less problem - each class is responsible for a certain task - define it clearly and define to whom it is reporting (its listeners) and what these listeners may be interested in.
When you design the communication structure within your hierarchy of classes (directors, managers, team managers and workers) have in mind, that the communication structure should not break the management hierarchy. A director gives global orders to a manager, which delegates several tasks to the team managers, which make their workers do what is needed. This structure makes a big company controlable by directors - the same principles can also keep control within an application.
greetings Marsian

Large number of JSP performance

Hi,
a colleague of me made tests with a large number of JSP and identified a
performance problem.
I believe I found a solution to his problem. I tested it with WLS 5.1 SP2
and SP3 and MS jview SDK 4.
The issue was related to the duration of the initial call of the nth JSP,
our situation as we are doing site hosting.
The solution is able to perform around 14 initial invocations/s no matter if
the invocation is the first one or the
3000th one and the throughput can go up to 108 JSPs/s when the JSP are
already loaded, the JSPs being the
snoopservlet example copied 3000 times.
The ratio have more interest than the values as the test machine (client and
WLS 5.1) was a 266Mhz laptop.
I repeat the post of Marc on 2/11/2000 as it is an old one:
Hi all,
I'm wondering if any of you has experienced performance issue whendeploying
a lot of JSPs.
I'm running Weblogic 4.51SP4 with performance pack on NT4 and Jdk1.2.2.
I deployed over 3000 JSPs (identical but with a distinct name) on myserver.
I took care to precompile them off-line.
To run my tests I used a servlet selecting randomly one of them and
redirecting the request.
getServletContext().getRequestDispatcher(randomUrl).forward(request,response);
The response-time slow-down dramaticaly as the number of distinct JSPs
invoked is growing.
(up to 100 times the initial response time).
I made some additional tests.
When you set the properties:
weblogic.httpd.servlet.reloadCheckSecs=-1
weblogic.httpd.initArgs.*.jsp=..., pageCheckSeconds=-1, ...
Then the response-time for a new JSP seems linked to a "capacity increase
process" and depends on the number of previously activated JSPs. If you
invoke a previously loaded page the server answers really fast with no
delay.
If you set previous properties to any other value (0 for example) the
response-time remains bad even when you invoke a previously loaded page.SOLUTION DESCRIPTION
Intent
The package described below is design to allow
* Fast invocation even with a large number of pages (which can be the case
with Web Hosting)
* Dynamic update of compiled JSP
Implementation
The current implementation has been tested with JDK 1.1 only and works with
MS SDK 4.0.
It has been tested with WLS 5.1 with service packs 2 and 3.
It should work with most application servers, as its requirements are
limited. It requires
a JSP to be able to invoke a class loader.
Principle
For a fast invocation, it does not support dynamic compilation as described
in the JSP
model.
There is no automatic recognition of modifications. Instead a JSP is made
available to
invalidate pages which must be updated.
We assume pages managed through this package to be declared in
weblogic.properties as
weblogic.httpd.register.*.ocg=ocgLoaderPkg.ocgServlet
This definition means that, when a servlet or JSP with a .ocg extension is
requested, it is
forwarded to the package.
It implies 2 things:
* Regular JSP handling and package based handling can coexist in the same
Application Server
instance.
* It is possible to extend the implementation to support many extensions
with as many
package instances.
The package (ocgLoaderPkg) contains 2 classes:
* ocgServlet, a servlet instantiating JSP objects using a class loader.
* ocgLoader, the class loader itself.
A single class loader object is created.
Both the JSP instances and classes are cached in hashtables.
The invalidation JSP is named jspUpdate.jsp.
To invalidate an JSP, it has simply to remove object and cache entries from
the caches.
ocgServlet
* Lazily creates the class loader.
* Retrieves the target JSP instance from the cache, if possible.
* Otherwise it uses the class loader to retrieve the target JSP class,
create a target JSP
instance and stores it in the cache.
* Forwards the request to the target JSP instance.
ocgLoader
* If the requested class has not the extension ocgServlet is configured to
process, it
behaves as a regular class loader and forwards the request to the parent
or system class
loader.
* Otherwise, it retrieves the class from the cache, if possible.
* Otherwise, it loads the class.
Do you thing it is a good solution?
I believe that solution is faster than standard WLS one, because it is a
very small piece of code but too because:
- my class loader is deterministic, if the file has the right extension I
don't call the classloader hierarchy first
- I don't try supporting jars. It has been one of the hardest design
decision. We definitely need a way to
update a specific page but at the same time someone post us NT could have
problems handling
3000 files in the same directory (it seems he was wrong).
- I don't try to check if a class has been updated. I have to ask for
refresh using a JSP now but it could be an EJB.
- I don't try to check if a source has been updated.
- As I know the number of JSP I can set pretty accurately the initial
capacity of the hashtables I use as caches. I
avoid rehash.

Use a profiler to find the bottlenecks in the system. You need to determine where the performance problems (if you even have any) are happening. We can't do that for you.

Large number of JSP performance [repost for grandemange]

Hi,
a colleague of me made tests with a large number of JSP and identified a
performance problem.
I believe I found a solution to his problem. I tested it with WLS 5.1 SP2
and SP3 and MS jview SDK 4.
The issue was related to the duration of the initial call of the nth JSP,
our situation as we are doing site hosting.
The solution is able to perform around 14 initial invocations/s no matter if
the invocation is the first one or the
3000th one and the throughput can go up to 108 JSPs/s when the JSP are
already loaded, the JSPs being the
snoopservlet example copied 3000 times.
The ratio have more interest than the values as the test machine (client and
WLS 5.1) was a 266Mhz laptop.
I repeat the post of Marc on 2/11/2000 as it is an old one:
Hi all,
I'm wondering if any of you has experienced performance issue whendeploying
a lot of JSPs.
I'm running Weblogic 4.51SP4 with performance pack on NT4 and Jdk1.2.2.
I deployed over 3000 JSPs (identical but with a distinct name) on myserver.
I took care to precompile them off-line.
To run my tests I used a servlet selecting randomly one of them and
redirecting the request.
getServletContext().getRequestDispatcher(randomUrl).forward(request,response);
The response-time slow-down dramaticaly as the number of distinct JSPs
invoked is growing.
(up to 100 times the initial response time).
I made some additional tests.
When you set the properties:
weblogic.httpd.servlet.reloadCheckSecs=-1
weblogic.httpd.initArgs.*.jsp=..., pageCheckSeconds=-1, ...
Then the response-time for a new JSP seems linked to a "capacity increase
process" and depends on the number of previously activated JSPs. If you
invoke a previously loaded page the server answers really fast with no
delay.
If you set previous properties to any other value (0 for example) the
response-time remains bad even when you invoke a previously loaded page.SOLUTION DESCRIPTION
Intent
The package described below is design to allow
* Fast invocation even with a large number of pages (which can be the case
with Web Hosting)
* Dynamic update of compiled JSP
Implementation
The current implementation has been tested with JDK 1.1 only and works with
MS SDK 4.0.
It has been tested with WLS 5.1 with service packs 2 and 3.
It should work with most application servers, as its requirements are
limited. It requires
a JSP to be able to invoke a class loader.
Principle
For a fast invocation, it does not support dynamic compilation as described
in the JSP
model.
There is no automatic recognition of modifications. Instead a JSP is made
available to
invalidate pages which must be updated.
We assume pages managed through this package to be declared in
weblogic.properties as
weblogic.httpd.register.*.ocg=ocgLoaderPkg.ocgServlet
This definition means that, when a servlet or JSP with a .ocg extension is
requested, it is
forwarded to the package.
It implies 2 things:
* Regular JSP handling and package based handling can coexist in the same
Application Server
instance.
* It is possible to extend the implementation to support many extensions
with as many
package instances.
The package (ocgLoaderPkg) contains 2 classes:
* ocgServlet, a servlet instantiating JSP objects using a class loader.
* ocgLoader, the class loader itself.
A single class loader object is created.
Both the JSP instances and classes are cached in hashtables.
The invalidation JSP is named jspUpdate.jsp.
To invalidate an JSP, it has simply to remove object and cache entries from
the caches.
ocgServlet
* Lazily creates the class loader.
* Retrieves the target JSP instance from the cache, if possible.
* Otherwise it uses the class loader to retrieve the target JSP class,
create a target JSP
instance and stores it in the cache.
* Forwards the request to the target JSP instance.
ocgLoader
* If the requested class has not the extension ocgServlet is configured to
process, it
behaves as a regular class loader and forwards the request to the parent
or system class
loader.
* Otherwise, it retrieves the class from the cache, if possible.
* Otherwise, it loads the class.
Do you thing it is a good solution?
I believe that solution is faster than standard WLS one, because it is a
very small piece of code but too because:
- my class loader is deterministic, if the file has the right extension I
don't call the classloader hierarchy first
- I don't try supporting jars. It has been one of the hardest design
decision. We definitely need a way to
update a specific page but at the same time someone post us NT could have
problems handling
3000 files in the same directory (it seems he was wrong).
- I don't try to check if a class has been updated. I have to ask for
refresh using a JSP now but it could be an EJB.
- I don't try to check if a source has been updated.
- As I know the number of JSP I can set pretty accurately the initial
capacity of the hashtables I use as caches. I
avoid rehash.
Cheers - Wei

I dont know the upper limit, but I think 80 is too much. I have never used more than 15-20. For Nav attributes, a seperate tables are created which causes the Performance issue as result in new join at query run time. Just ask your business guy, if these can be reduced.One way could be to model these attributes as seperate characteristics. It will certainly help.
Thanks...
Shambhu

Problem in compilation with very large number of method parameters

I have java file which I created using WSDL2Java. Since the actual WSDL has a complex type with a large number of elements(around 600) in it, Consequently the resulting java file(from WSDL2Java) has a method that takes 600 parameters of various types. When I try to compile it using javac at command prompt, it says "Too many parameters" and doesn't compile. The same is compiling successfully using JBuilder X . The only way I could compile successfully at command prompt is by reducing the number of parameters to around 250 but unfortunately that it's not a workable solution. Does Sun specify any upper bound on number of parameters that can be passed to a method?

... a method that takes 600 parameters ...Not compatible with the spec, see Method Descriptors.
When I try to compile it using javac at
command prompt, it says "Too many parameters" and
doesn't compile.As it should.
The same is compiling successfully using JBuilder X .If JBuilder produces a class file, that class file may very well be invalid.
The only way I could compile
successfully at command prompt is by reducing the
number of parameters to around 250Which is what the spec says.
but unfortunately that it's not a workable solution.Pass an array of objects - an array is just one object.
Does Sun specify
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Mail to a large number of

HI
I was wondering if there exists a software that handles group mails for a large number of recipients (like 400 adresses) at one time.
I think mail doesn't accept more than 50 adresses /mail at a time.
I used to use a PC based software called sarbacane designed for mass emailing (not spamming, that's understood .. !), with charts, statistics and remailing automatically to adresses that did not function etc ... does that exist for Mac ??
Thank you anyone who has the answer !!
Stephanie

Hello Stephanie
I do the same, and ran into the same problem. It was my ISP that was limiting how many emails I could send at once. I 'think' (because I'm not a tech person) that Mail takes the message and puts 50 or more address at the top. ISPs will see this as a possible spam mail out. I worked around this by creating groups of less than 50 email addresses (using Smart Groups), but after awhile it got very tedious having to sort and create criteria to keep each group to just less than 50.
There are commercial programs that manage large emailings. I use 'Mailings', and it works fine. I know that there are others as well. Most have a free trial version.
Instead of sending one message with lots of addresses, it sends the email multiple times - once to each person in your list. It takes longer (but it works in background, so who cares) but I have been able to send out to hundreds of addresses with no issues. Hope this helps.
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Huge memory usage while parsing a large number of files

hi,
I use ORACLE8i XML parser class in my app.The problem is that
when I parse a large number of xml files ,memory usage is so
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memory low dialog.Could anybody give me some idea about this.
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Hi Mike. Yes I do have this enabled but this should only be requesting login to view the normal (open) applications. What I end up getting, after I login, is all the applications restarting. In the case of the synchronising files the database has to rebuild itself every time (160,000 files), and nothing has been happening while logged out. Using the Caffeine app I have still enabled the screensaver using a hot corner and had to log back in after 10 minutes but all the applications were still running, including the synchronisation. I am pretty sure my laptop has not gone into sleep mode, or it wouldn't have to reopen the apps, but it also has not shutdown as I get a login box as soon as I press any key. I can't understand the problem, and what makes it even stranger is that it is happening on two separate MacBooks at the same time. Thanks for the suggestion – really appreciated.
OldGnome - thanks for the suggestion for the other app. I chose Caffeine as this has really good user reviews but the other one doesn't seem to have any, but I might still try it. Again thanks for your help.

Is there a maximum number for the classes in a package

I have strange problem
I have a project that have the data model in jar and it runs successfully
I tried to decompile the jar pacakge by package
the application still run tell i decompiled a package that have large number of classes 170 + 170 hibernate mapping file
then the application compile but not running and stop responding
i use jdeveloper 10.2.2.0 build 1929 and i cannot change to last version

There is no such limitation.
You can't expect a decompiled java application to run as the original.
You should try to get hold of the java source instead of decompile some jars.
Timo

Mail - how to send to large number of recipients?

How can I send an email to a large number of recipients that I hold addresses for in a document without a) adding them to my contacts, and b) so that they can't all see each others addresses?

I thought about using BCC, but it seems a little messy although it would do the job.
Messy how? That's exactly what it's for. In fact, there's no other way to hide addresses from other recipients of the message. The only other way to do it would be to script automated sending of one message per address, and that would get quite messy!
What is the maximum number of recipients that Mail can handle?
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One of the issues I had when using Outlook on Windows for this by copying and pasting from a text document, was that if there was an invalid/non-existent address in the list, it would just return an error and I was never quite sure if the whole thing didn't send, or if it was just to the dodgy address(es).
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Yes, You can actually write a ABAP program, but bottom line is that you cant edit more than one role at a time in PFCG.
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How to handle a large number of query parameters for a Browse screen

I need to implement an advanced search functionality in a browse screen for a large table. The table has 80+ columns and therefore will have a large number of possible query parameters. The screen will be built on a modeled query with all
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I almost have it working. It may be as easy as marking all of the screen properties that are query parameters as screen parameters (not required), then passing them in from the saved query data (filtered by username, queryname, and selected
item). I'll post an update once I get it. Probably will have some more questions as I go through it. Thanks again!

I want to change the sharing and permissions of a large number of photos. How can I do this in bulk rather than one at a time?

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Does this involve iPhoto in some way?

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I am trying to delete a large number of songs from my itunes library without having to do it one at a time. How can I do this. All of my songs have check marks by them. Help!

Then I suspect you do not have iTunes Match enabled. Using that "delete all" command in the Settings does not remove the music from the cloud, nor does it disable iTunes Match. With iTunes Match enabled you will still see all the music.
So go to Settings > iTunes and App Store and make sure iTunes Match is set to ON (green).

I have a large number of photos imported into iPhoto with the dates wrong. How can I adjust multiple photos (with varying dates) to the same, correct, date?

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Remove the following to the trash and restart the computer and try again:
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Home > Library > Preferences > com.apple.iPhoto (There may be more than one. Remove them all.)
---NOTE: to get to the "home > library" hold down option on the keyboard and click on "Go" > "Library" while in the Finder.
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Hi,
can you please explain why the solution from steve is not the right solution for you.
regards
Peter

Large Number of Smart Classes

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