Using WLDF and a custom class preprocessor
I'm already using a class preprocessor for instrumenting classes during class loading with the java option "weblogic.classloader.preprocessor". When I run this in Weblogic 9.2.2 with WLDF enabled, on the MedRec server, I get the following exception and the medrec app fails to deploy. Can anyone help? My preprocessor adds some byte code to get method execution times. It works fine when I do not have WLDF turned on. But when WLDF is enabled, this exception occurs. I've tried to disable it on a class by class basis, but it will happen on the next class it tries to load which I have already instrumented.
Unable to deploy EJB: C:\bea\922\weblogic92\samples\server\medrec\src\medrecEar\sessionEjbs from sessionEjbs:
Unable to load a class specified in your ejb-jar.xml: Class bytes found but defineClass()failed for: 'com.bea.medrec.controller.PatientSessionEJB'
weblogic.application.ModuleException: Exception preparing module: EJBModule(sessionEjbs)
Unable to deploy EJB: C:\bea\922\weblogic92\samples\server\medrec\src\medrecEar\sessionEjbs from sessionEjbs:
Unable to load a class specified in your ejb-jar.xml: Class bytes found but defineClass()failed for: 'com.bea.medrec.controller.PatientSessionEJB'
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:381)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:360)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:56)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:46)
at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:615)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:191)
at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:147)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:61)
at weblogic.deploy.internal.targetserver.AppDeployment.prepare(AppDeployment.java:137)
at weblogic.management.deploy.internal.DeploymentAdapter$1.doPrepare(DeploymentAdapter.java:38)
at weblogic.management.deploy.internal.DeploymentAdapter.prepare(DeploymentAdapter.java:177)
at weblogic.management.deploy.internal.AppTransition$1.transitionApp(AppTransition.java:21)
at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:233)
at weblogic.management.deploy.internal.ConfiguredDeployments.prepare(ConfiguredDeployments.java:165)
at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:122)
at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:173)
at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:89)
at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
weblogic.ejb.container.deployer.DeploymentDescriptorException: Unable to load a class specified in your ejb-jar.xml: Class bytes found but defineClass()failed for: 'com.bea.medrec.controller.PatientSessionEJB'
at weblogic.ejb.container.deployer.MBeanDeploymentInfoImpl.initializeBeanInfos(MBeanDeploymentInfoImpl.java:600)
at weblogic.ejb.container.deployer.MBeanDeploymentInfoImpl.<init>(MBeanDeploymentInfoImpl.java:221)
at weblogic.ejb.container.deployer.EJBDeployer.prepare(EJBDeployer.java:1156)
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:354)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:360)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:56)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:46)
at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:615)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:191)
at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:147)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:61)
at weblogic.deploy.internal.targetserver.AppDeployment.prepare(AppDeployment.java:137)
at weblogic.management.deploy.internal.DeploymentAdapter$1.doPrepare(DeploymentAdapter.java:38)
at weblogic.management.deploy.internal.DeploymentAdapter.prepare(DeploymentAdapter.java:177)
at weblogic.management.deploy.internal.AppTransition$1.transitionApp(AppTransition.java:21)
at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:233)
at weblogic.management.deploy.internal.ConfiguredDeployments.prepare(ConfiguredDeployments.java:165)
at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:122)
at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:173)
at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:89)
at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
>
Hello,
If you can capture and post the output of your class-preprocessor, we can take a look at it.
Incidently, WLDF provides the TraceElapsedTimeAction library action which provides method execution time data.
Thanks,
rinamdar
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search-local-classes-first attribute in orion-web.xml
Shared libraries are inherited from the app root.
We have reasons why we prefer not to use .JAR files for these “non-standard” or “replaced” classes, so prefer an option that doesn’t involve creating a .JAR file.
Our ideal solution would be to have such classes placed in an alternate directory that is referred to in a classpath such that IF a class exists in that location, it will be used instead of the one in the WEB-INF/classes/ directories, and if not such class is found it would then locate it in the WEB-INF/classes/ directories.
- Can a classpath be set to look for such classes in a directory?
- Do the classes have to replicate the original package directory structure within that directory (<dir>/talent2/alesco/model/libraries)?
- If the class were put in such a directory, without replicating the original package directory structure, I assume the referencing “import” statements would not locate it correctly.
- Is the classpath mechanism “clever” enough to search the package directory structure to locate the class (i.e. just points to <dir>)?
- Or would the classpath mechanism require each individual path replicating the package structure to be added (i.e. <dir>/talent2/alesco/model/libraries/ and any other such package path)?
If we are “forced” to resort to the use of JAR files, does a JAR file used for the purpose of overwrite/extending a sub-set of classes in the original location need to contain ALL related package classes? Or does it effectively “superset” classes it finds in all JAR files, etc. in the whole classpath? That is, it finds talent2.alesco.model.libraries.ModelUtil in the custom.jar file and happily goes on to get the remainder of talent2.alesco.model.libraries classes in the other core JAR/location. Or does it need all of them to be in the first JAR file for that package?
Any help would be appreciated to understand how these various class visibility mechanisms could be used to achieve what is required would be appreciated.
GeneSo, nobody's had any experience with deploying an ADF application, and providing a means for a client to place custom classes in such a way as they're used in preference to the standard application class, effectively to implement a customised class without overwriting the original "standard" class?
Gene -
Build app with ODT and Oracle UDT - Error while creating custom class
Hello CShay,
I am testing you sample code to create UDT with ASP.Net app. It is also published in Oracle magazine.
The article is also published at following link:
http://www.oracle.com/technology/oramag/oracle/08-may/o38net.html
I am able to successfully implement all the steps before "Using Custom Class Wizard". When I right click on any of the object (CUSTOMER_OBJ, PHONELIST_OBJ, and ADDRESS_OBJ) and select Generate Custom Class, I get the following error:
Oracle custom class wizard.
Class can be generated only for either C#, VB or Managed C++ projects.
Am I missing any thing?
Thanks in advance for your help.Yes I confirm that I choose File->New Website.
I don't see the following option
File -> New Project, and then under Visual C#, select ASP.NET Web Application
I am using VS2005 Professional Edition.
The options I see under Visual C# are:
If I click on
Windows tab:
Windows Application
Windows Control Library
Console Application
Empty Project
Class Library
Web Control Library
Window Servcie
Crystal Report Application
and Search Online Templates in My Templates tab.
Couple of options for Smart Device which also doesn't include ASP.Net
then Database, Starter kits and Office tabs which also doesn't include ASP.net thing.
I don't know how did you see that option or you might be using different version of VS (Enterprise).
But right now I am stuck.
Please provide me your valuable comments.
Thanks for your help. -
SE24 or In-line Declaration of Custom Class to be Used in a Custom Exit ???
After our implementation of a custom screen in EXIT_SAPLIE01_007, the function-group XQSM contained the following custom elements:
XQSM
Function Modules
EXIT_SAPLIE01_007 (this just includes ZXQSMU06)
PBO Modules
STATUS_9000
PAI Modules
USER_COMMAND_9000
SCREENS
9000 (custom screen (modal dialog box))
GUI_STATUS
9000 (status for custom screen)
INCLUDES
ZXQSMI01 (contains PAI module)
ZXQSMO01 (contains PBP module)
ZXQSMTOP (declares custom global variables)
ZXQSMZZZ (this just includes ZXQSMI01/ZXQSMO01
ZXQSMU06 (this calls custom screen 9000)
Then the users decided they wanted an editable ALV on custom screen 9000 (to handle multi-item GR postings in MIGO, not just single-item postings.)
Since I never coded an editable ALV before, I first created a working editable ALV program from the SAP demo program BCALV_EDIT_03 plus some additions/modifications kindly provided by Uwe Schieferstein down in the ABAP Objects Forum.
But now I'm stuck because I don't know which components of the XQSM function group I should put the following pieces of code in:
1)
class lcl_event_receiver definition deferred.
data: g_event_receiver type ref to lcl_event_receiver.
2)
class lcl_event_receiver definition.
public section.
private section.
endclass.
3)
class lcl_event_receiver implementation.
endclass.
Can someone please tell me where (1-3) belong inside XQSM - what components they should be put into?
Or should I just build a custom class in SE24 and use it in the exit ??? (By "use it", I mean instantiate it and call its methods.)
It seems to me that if I could define the class in SE24,it would be a lot easier, because everything else except (1-3) above clearly belongs in the PBO or PAIof the screen.Hello David
In thread
how to activate or deactivate a user-exit based a specific condition
I have described a general strategy for implementing CMOD/SMOD exits. In your case, I would create a function group <b>ZXQSM</b> having two function modules:
- <b>Z_EXIT_SAPLIE01_007</b> (= copy of EXIT_SAPLIE01_007) => calls the following fm
- <b>Z_EXIT_SAPLIE01_007_SPEC</b> (-> specific exit that is executed only if certain conditions are fulfilled
All you implementations for you editable ALV grid belong into your customer function group ZXQSM.
Regards
Uwe
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