Using Toplink with JSF

This kind of crosses the boundaries of 2 forms. And since I'm not getting much response over in JDev perhaps this forums residents could help shed some light on the problem:
Updating Toplink objects with JSF

Thanks for bringing the thread to my attention. Keeping an eye on all the forums is challenging and occasionally we miss TopLink specific questions in the other forums. I have posted a response looking for more information on the original thread.
Doug

Similar Messages

Problem using Toplink with JUnit

Hi,
I have a problem using Toplink with JUnit. Method under test is very simple: it use a static EntityManager object to open a transaction and persists data to db. When I invoke the method from a test method, it gives me the exception:
java.lang.AssertionError
     at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.computePURootURL(PersistenceUnitProcessor.java:248)
     at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.findPersistenceArchives(PersistenceUnitProcessor.java:232)
     at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.findPersistenceArchives(PersistenceUnitProcessor.java:216)
     at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:239)
     at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initializeFromMain(JavaSECMPInitializer.java:278)
     at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.getJavaSECMPInitializer(JavaSECMPInitializer.java:81)
     at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:119)
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
     at it.valerio.electromanager.model.EntityFacade.<clinit>(EntityFacade.java:12)
     at it.valerio.electromanager.business.ClienteBiz.insertIntoDatabase(ClienteBiz.java:36)
     at it.valerio.electromanager.test.model.ClienteTest.insertDBTest(ClienteTest.java:30)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
     at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
     at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
     at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
     at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
     at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:66)
     at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
     at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
     at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
     at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
     at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Where is the problem???
Regards,
Valerio

EntityFacade class is very simple and it uses a static EntityManager object. Here the code:
public class EntityFacade {
     private static EntityManager em = Persistence.createEntityManagerFactory("ElectroManager").createEntityManager();
     private static Logger logger=Logger.getLogger(EntityFacade.class);
     public static void insertCliente(Cliente c)
          logger.debug("Inserisco cliente nel db: " + c);
          em.getTransaction().begin();
          c.setId(getNextIdForTable("Cliente"));
          em.persist(c);
          em.getTransaction().commit();
If I call the method from inside a main it works well, so I think the problem is not the classpath neither the URL in the persistence.xml. However the URL is:
<property name="toplink.jdbc.url" value="jdbc:derby:c:/programmi/ElectroManager/db/electroManager"/>
I use the latest build version of TopLink.
Thanks.

Navigation problem when using tiles with JSF

Hi all,
I m using tiles with JSF. i have included all the libraries and jsp page is rendered properly. but when i use <h:commandLink> in the body part of the JSP , i cannot go to the specified link. when we use tiles, what changes need to be done in faces-config file?? i mean what navigation rule we need to specify ??

Hello, I have the same problem; JSF+Tiles = No navigation.
One basic question is should I reference the parent jsp or the included body jsp in the faces-config.xml file.
For example: The login.jsp is a main tiles page that includes a menu.jsp, header.jsp & a loginBody.jsp.
Hence the faces-config could have this rule;
<navigation-rule>
<from-view-id>/login.jsp</from-view-id>
<navigation-case>
<to-view-id>/catalog.jsp</to-view-id>
</navigation-case>
</navigation-rule>
(I've left the outcome tag out to simplify this post)
Or, I could refer loginBody.jsp in the navigation rule;
<navigation-rule>
<from-view-id>/loginBody.jsp</from-view-id>
<navigation-case>
<to-view-id>/catalog.jsp</to-view-id>
</navigation-case>
</navigation-rule>
The loginBody.jsp has a commandbutton which a user clicks which starts the navigation.
Neither seems to work unfortunately & I'm a stuck.
Thanks

Using CAPTCHA with jsf

Has anyone used CAPTCHA with jsf? Is there a free jar file for doing this?

I am using JSF 1.2 with RichFaces.
I want to implement SimpleCaptcha in the application.
On my loginpage I am able to add a captcha image.
Here is the exception that I get. This I get after when my jsp page(on which this image is) loads.
StandardWrapperValve[StickyCaptcha]: PWC1406: Servlet.service() for servlet StickyCaptcha threw exception
java.lang.IllegalStateException: PWC3999: Cannot create a session after the response has been committed
at org.apache.coyote.tomcat5.CoyoteRequest.doGetSession(CoyoteRequest.java:2709)
at org.apache.coyote.tomcat5.CoyoteRequest.getSession(CoyoteRequest.java:2482)
at org.apache.coyote.tomcat5.CoyoteRequestFacade.getSession(CoyoteRequestFacade.java:871)
at org.apache.coyote.tomcat5.CoyoteRequestFacade.getSession(CoyoteRequestFacade.java:882)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:248)
at nl.captcha.servlet.SimpleCaptchaServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:718)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
What could be the reason?

Using TopLink with SCM

Hi!
I was working with my .mw file with OSCM source control instead of appear this error:
"An unexpected error has occurred.We are sorry for the inconvenience.
Messagge:
EXCEPTION DESCRIPTION: File already exists: [C:\Documents and Settings\mpedretti.DSI\Mis documentos\DocumentosToplink\Carpeta nueva\Table\Nueva 2.xml]
Stack trace:
Throwable Class Name:
oracle.toplink.xml.XMLDataStoreException
Message:
EXCEPTION DESCRIPTION: File already exists: [C:\Documents and Settings\mpedretti.DSI\Mis documentos\DocumentosToplink\Carpeta nueva\Table\Nueva 2.xml]
Stack trace:
LOCAL EXCEPTION STACK:
EXCEPTION [TOPLINK-13005] (TopLink - 9.0.3 (Build 423)): oracle.toplink.xml.XMLDataStoreException
EXCEPTION DESCRIPTION: File already exists: [C:\Documents and Settings\mpedretti.DSI\Mis documentos\DocumentosToplink\Carpeta nueva\Table\Nueva 2.xml]
     at oracle.toplink.xml.XMLDataStoreException.fileAlreadyExists(Unknown Source)
     at oracle.toplink.xml.XMLFileStreamPolicy.getWriteStream(Unknown Source)
     at oracle.toplink.xml.XMLFileStreamPolicy.getNewWriteStream(Unknown Source)
     at oracle.toplink.xml.XMLFileAccessor.getNewWriteStream(Unknown Source)
     at oracle.toplink.xml.XMLAccessorStreamPolicy.getNewWriteStream(Unknown Source)
     at oracle.toplink.xml.XMLInsertCall.getWriteStream(Unknown Source)
     at oracle.toplink.xml.XMLWriteCall.execute(Unknown Source)
     at oracle.toplink.sdk.SDKAccessor.executeCall(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.executeCall(Unknown Source)
     at oracle.toplink.sdk.SDKQueryMechanism.executeCall(Unknown Source)
     at oracle.toplink.sdk.SDKQueryMechanism.executeNoSelectCalls(Unknown Source)
     at oracle.toplink.sdk.SDKQueryMechanism.insertObject(Unknown Source)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.insertObjectForWrite(Unknown Source)
     at oracle.toplink.queryframework.InsertObjectQuery.executeCommit(Unknown Source)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.performUserDefinedWrite(Unknown Source)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.performUserDefinedInsert(Unknown Source)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.insertObjectForWrite(Unknown Source)
     at oracle.toplink.queryframework.WriteObjectQuery.executeCommit(Unknown Source)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.executeWrite(Unknown Source)
     at oracle.toplink.queryframework.WriteObjectQuery.execute(Unknown Source)
     at oracle.toplink.queryframework.DatabaseQuery.execute(Unknown Source)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.internalExecuteQuery(Unknown Source)
     at oracle.toplink.publicinterface.Session.executeQuery(Unknown Source)
     at oracle.toplink.publicinterface.Session.executeQuery(Unknown Source)
     at oracle.toplink.internal.sessions.CommitManager.commitAllObjects(Unknown Source)
     at oracle.toplink.publicinterface.Session.writeAllObjects(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitToDatabase(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitRootUnitOfWork(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitAndResume(Unknown Source)
     at oracle.toplink.workbench.ui.BldrSession.saveProject(Unknown Source)
     at oracle.toplink.workbench.ui.BldrMainView.saveProject(Unknown Source)
     at oracle.toplink.workbench.ui.BldrMainView.saveSelectedProjects(Unknown Source)
     at oracle.toplink.workbench.ui.BldrActionManager$104.actionPerformed(Unknown Source)
     at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
     at javax.swing.AbstractButton.doClick(Unknown Source)
     at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(Unknown Source)
     at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Window.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
This happen when I tried to save the project. Any suggestion??
What are the best practices to apply SCM using Toplink?
Thanks!!
Matias

Whenever this happens you should be able to do a "file>save as" and save the project in a new directory -- at least you won't be loosing your work.
Basically I think the problem is either that somehow you corrupted the project with checkin/checkout process, or you did not check out a file that the Mapping Workbench is trying to update when you save the project.
10g Mapping Workbench, I have heard, is going to have more intelligence in the area and note ahead of time which files need to be checked out when you save your project. I think a developer preview will be available any day now, keep your eyes peeled to the OTN webpage for TopLink.
The mapping workbench reference guide has a couple pages that talk about how to use it with SCM systems. In TopLink 903 these docs are shipped with TopLink. See page 1-11 for more info.

Using Tiles with JSF

Hi All,
I am trying to integrate Tiles with JSF using the MyFaces components. I followed the following steps to use the MyFaces components in my web application:
- Copied the jar files myfaces-jsf-api.jar, myfaces.jar, jstl.jar, jakarta-oro.jar, commons-codec-1.2.jar, commons-el.jar, commons-fileupload-1.0.jar, commons-logging.jar and commons-validator.jar to the WEB-INF/lib dir.
- Removed the jsf-api.jar
When I restart the my server I get the following error:
com.sun.faces.config.ConfigureListener Can't parse configuration file:wsjar:file://WebContent/WEB-INF/lib/myfaces.jar!/META-INF/faces-config.xml
com.sun.faces.config.ConfigureListener TRAS0014I: The following exception was logged java.net.SocketException: Operation timed out: connect:could be due to invalid address
Kindly help me out. I am using WSAD 5.1.2 for development.
Thanks in advance.
Regards,
Saket

Saket,
you have to remove all files from sun, if you want to use MyFAces instead of RI.
com.sun.faces.config.ConfigureListener is a ContextListener, that is defined in TLD files of the RI. And also remove jsf-impl.jar
here is a running MyFaces/Tiles example!
http://cvs.apache.org/dist/incubator/myfaces/builds/
HTH,
-Matthias

Exception while using struts with jsf

Hi
Iam trying to integrate struts with jsf. when iam trying to load jsf page ...getting the following error
Unable to initialize jsf interceptors probably due missing JSF implementation libraries
Please help me to fix this .

this is my web.xml
<?xml version="1.0"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>appstruts2</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

How do I use toplink with Spring 2.5 and oc4j 10.1.2?

Our existing java server environment is limited to Oc4j 10.1.2 due to being tied to Oracle Forms.
We've added a java 6 jdk to the machine and linked it to a specific container to examine some newer java features since this version of the application server only comes with java 1.4.2.
Does anyone have some configuration steps for getting toplink essentials and spring to work with oc4j 10.1.2? Even with oc4j 10.1.3 in jdev 10.1.3.4 I'm having problems trying to figure out what needs placed in the persistence.xml file verses what needs placed in the spring-beans.xml file.
I'm trying to either use the J2SE option of keeping the connection information in the persistence.xml file (which doesn't work) - it tries to connect to //localhost:1521/orcl. If I try to define a datasource within Spring's xml file, I'm not sure how to tie that into the persistence.xml file. Could I use the oc4j 10.1.2 container provided datasource?
It seems like I'm at a loss as to how to get this working. If you'd like me to post some files, I can do that later on today when I get back to work.
The configuration that I'm trying to do is based on a modified workspace from an ibm developerworks article with websphere, mixing in the ideas from a JPA with Spring 2.0 article from Mike Keith and Rod Johnson. (That article goes pretty far in the configuration information but never provided an example to download...)
Any help appreciated.
Eric (hbg, pa)

I'm still at a loss with this. Rather than worry about the older version, for now, I just want to see JPA in action. So, I've decided on just running the Spring 2.5.6 petclinic example out of the samples folder. When I try to do this, after only tweaking the web.xml to use the applicationContext-jpa.xml file, the application does not initialize properly. Here's the stack trace I get:
Target URL -- http://192.168.0.2:8988/petclinic/index.jsp
09/05/11 23:26:05 Oracle Containers for J2EE 10g (10.1.3.4.0) initialized
WARNING: Code-source C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib\connector.jar (from WEB-INF/lib/ directory in C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib) has the same filename but is not identical to /C:/jdev10134/j2ee/home/lib/connector.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in C:\jdev10134\j2ee\home\oc4j.jar). If it contains different versions of the same classes, it will be masked as the latter is already visible in the search path of loader current-workspace-app.web.petclinic:0.0.0.
WARNING: Code-source C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib\jta.jar (from WEB-INF/lib/ directory in C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib) has the same filename but is not identical to /C:/jdev10134/j2ee/home/lib/jta.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in C:\jdev10134\j2ee\home\oc4j.jar). If it contains different versions of the same classes, it will be masked as the latter is already visible in the search path of loader current-workspace-app.web.petclinic:0.0.0.
WARNING: Code-source C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib\persistence.jar (from WEB-INF/lib/ directory in C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib) has the same filename but is not identical to /C:/jdev10134/j2ee/home/lib/persistence.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in C:\jdev10134\j2ee\home\oc4j.jar). If it contains different versions of the same classes, it will be masked as the latter is already visible in the search path of loader current-workspace-app.web.petclinic:0.0.0.
WARNING: Code-source C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib\toplink-essentials.jar (from WEB-INF/lib/ directory in C:\javalib\spring-2.5.6\samples\petclinic\war\WEB-INF\lib) has the same filename but is not identical to /C:/jdev10134/toplink/jlib/toplink-essentials.jar (from <code-source> in /C:/jdev10134/jdev/system/oracle.j2ee.10.1.3.42.70/embedded-oc4j/config/server.xml). If it contains different versions of the same classes, it will be masked as the latter is already visible in the search path of loader current-workspace-app.web.petclinic:0.0.0.
09/05/11 23:26:24 log4j: Parsing for [root] with value=[INFO, stdout].
09/05/11 23:26:24 log4j: Level token is [INFO].
09/05/11 23:26:24 log4j: Category root set to INFO
09/05/11 23:26:24 log4j: Parsing appender named "stdout".
09/05/11 23:26:24 log4j: Parsing layout options for "stdout".
09/05/11 23:26:24 log4j: Setting property [conversionPattern] to [%d %p [%c] - <%m>%n].
09/05/11 23:26:24 log4j: End of parsing for "stdout".
09/05/11 23:26:24 log4j: Parsed "stdout" options.
09/05/11 23:26:24 log4j: Parsing for [org.springframework.samples.petclinic.aspects] with value=[DEBUG].
09/05/11 23:26:24 log4j: Level token is [DEBUG].
09/05/11 23:26:24 log4j: Category org.springframework.samples.petclinic.aspects set to DEBUG
09/05/11 23:26:24 log4j: Handling log4j.additivity.org.springframework.samples.petclinic.aspects=[null]
09/05/11 23:26:24 log4j: Finished configuring.
09/05/11 23:26:24 log4j: Reading configuration from URL file:/C:/javalib/spring-2.5.6/samples/petclinic/war/WEB-INF/classes/log4j.properties
09/05/11 23:26:24 log4j: Parsing for [root] with value=[INFO, stdout].
09/05/11 23:26:24 log4j: Level token is [INFO].
09/05/11 23:26:24 log4j: Category root set to INFO
09/05/11 23:26:24 log4j: Parsing appender named "stdout".
09/05/11 23:26:24 log4j: Parsing layout options for "stdout".
09/05/11 23:26:24 log4j: Setting property [conversionPattern] to [%d %p [%c] - <%m>%n].
09/05/11 23:26:24 log4j: End of parsing for "stdout".
09/05/11 23:26:24 log4j: Parsed "stdout" options.
09/05/11 23:26:24 log4j: Parsing for [org.springframework.samples.petclinic.aspects] with value=[DEBUG].
09/05/11 23:26:24 log4j: Level token is [DEBUG].
09/05/11 23:26:24 log4j: Category org.springframework.samples.petclinic.aspects set to DEBUG
09/05/11 23:26:24 log4j: Handling log4j.additivity.org.springframework.samples.petclinic.aspects=[null]
09/05/11 23:26:24 log4j: Finished configuring.
2009-05-11 23:26:24,593 INFO [org.springframework.web.context.ContextLoader] - <Root WebApplicationContext: initialization started>
2009-05-11 23:26:24,687 INFO [org.springframework.web.context.support.XmlWebApplicationContext] - <Refreshing org.springframework.web.context.support.XmlWebApplicationContext@eeb406: display name [Root WebApplicationContext]; startup date [Mon May 11 23:26:24 EDT 2009]; root of context hierarchy>
2009-05-11 23:26:24,828 INFO [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - <Loading XML bean definitions from ServletContext resource [WEB-INF/applicationContext-jpa.xml]>
2009-05-11 23:26:25,281 INFO [org.springframework.web.context.support.XmlWebApplicationContext] - <Bean factory for application context [org.springframework.web.context.support.XmlWebApplicationContext@eeb406]: org.springframework.beans.factory.support.DefaultListableBeanFactory@1da817b>
2009-05-11 23:26:25,734 INFO [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer] - <Loading properties file from class path resource [jdbc.properties]>
2009-05-11 23:26:25,796 INFO [org.springframework.context.weaving.DefaultContextLoadTimeWeaver] - <Determined server-specific load-time weaver: org.springframework.instrument.classloading.oc4j.OC4JLoadTimeWeaver>
2009-05-11 23:26:28,296 INFO [org.springframework.web.context.support.XmlWebApplicationContext] - <Bean 'org.springframework.orm.jpa.vendor.TopLinkJpaVendorAdapter#c25ae3' is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)>
2009-05-11 23:26:28,359 INFO [org.springframework.web.context.support.XmlWebApplicationContext] - <Bean 'dataSource' is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)>
2009-05-11 23:26:28,437 INFO [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean] - <Building JPA container EntityManagerFactory for persistence unit 'PetClinic'>
2009-05-11 23:26:28,468 INFO [org.springframework.web.context.support.XmlWebApplicationContext] - <Bean 'entityManagerFactory' is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)>
2009-05-11 23:26:28,562 INFO [org.springframework.beans.factory.support.DefaultListableBeanFactory] - <Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1da817b: defining beans [org.springframework.context.weaving.AspectJWeavingEnabler#0,org.springframework.context.config.internalBeanConfigurerAspect,loadTimeWeaver,org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource,entityManagerFactory,transactionManager,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.transaction.config.internalTransactionAspect,org.springframework.samples.petclinic.aspects.UsageLogAspect#0,org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0,clinic]; root of factory hierarchy>
2009-05-11 23:26:29,671 INFO [org.springframework.web.context.ContextLoader] - <Root WebApplicationContext: initialization completed in 5078 ms>
2009-05-11 23:26:29,734 INFO [org.springframework.web.servlet.DispatcherServlet] - <FrameworkServlet 'petclinic': initialization started>
2009-05-11 23:26:29,734 INFO [org.springframework.web.context.support.XmlWebApplicationContext] - <Refreshing org.springframework.web.context.support.XmlWebApplicationContext@c00e55: display name [WebApplicationContext for namespace 'petclinic-servlet']; startup date [Mon May 11 23:26:29 EDT 2009]; parent: org.springframework.web.context.support.XmlWebApplicationContext@eeb406>
2009-05-11 23:26:29,734 INFO [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - <Loading XML bean definitions from ServletContext resource [WEB-INF/petclinic-servlet.xml]>
2009-05-11 23:26:30,171 INFO [org.springframework.web.context.support.XmlWebApplicationContext] - <Bean factory for application context [org.springframework.web.context.support.XmlWebApplicationContext@c00e55]: org.springframework.beans.factory.support.DefaultListableBeanFactory@1c5543b>
2009-05-11 23:26:30,375 INFO [org.springframework.beans.factory.support.DefaultListableBeanFactory] - <Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1c5543b: defining beans [addOwnerForm,addPetForm,addVisitForm,clinicController,editOwnerForm,editPetForm,findOwnersForm,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0,org.springframework.web.servlet.handler.SimpleMappingExceptionResolver#0,org.springframework.web.servlet.view.InternalResourceViewResolver#0,messageSource]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@1da817b>
2009-05-11 23:26:31,828 INFO [org.springframework.web.servlet.DispatcherServlet] - <FrameworkServlet 'petclinic': initialization completed in 2094 ms>
May 11, 2009 11:26:58 PM oracle.toplink.essentials.session.file:/C:/javalib/spring-2.5.6/samples/petclinic/war/WEB-INF/classes/-PetClinic.transaction
WARNING: PersistenceUnitInfo PetClinic has transactionType RESOURCE_LOCAL and therefore jtaDataSource will be ignored
May 11, 2009 11:26:58 PM oracle.toplink.essentials.session.file:/C:/javalib/spring-2.5.6/samples/petclinic/war/WEB-INF/classes/-PetClinic
INFO: TopLink, version: Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))
May 11, 2009 11:26:58 PM oracle.toplink.essentials.session.file:/C:/javalib/spring-2.5.6/samples/petclinic/war/WEB-INF/classes/-PetClinic
INFO: Server: unknown
May 11, 2009 11:26:58 PM oracle.toplink.essentials.session.file:/C:/javalib/spring-2.5.6/samples/petclinic/war/WEB-INF/classes/-PetClinic.connection
CONFIG: connecting(DatabaseLogin(
        platform=>EssentialsHSQLPlatformWithNativeSequence
        user name=> ""
        connector=>JNDIConnector datasource name=>null
May 11, 2009 11:27:03 PM oracle.toplink.essentials.session.file:/C:/javalib/spring-2.5.6/samples/petclinic/war/WEB-INF/classes/-PetClinic
SEVERE:
Local Exception Stack:
Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
Error Code: 17002
        at oracle.toplink.essentials.exceptions.DatabaseException.sqlException(DatabaseException.java:305)
        at oracle.toplink.essentials.jndi.JNDIConnector.connect(JNDIConnector.java:150)
        at oracle.toplink.essentials.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:184)
        at oracle.toplink.essentials.internal.databaseaccess.DatasourceAccessor.connect(DatasourceAccessor.java:233)
        at oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.connect(DatabaseAccessor.java:242)
        at oracle.toplink.essentials.internal.databaseaccess.DatasourceAccessor.connect(DatasourceAccessor.java:309)
        at oracle.toplink.essentials.threetier.ConnectionPool.buildConnection(ConnectionPool.java:117)
        at oracle.toplink.essentials.threetier.ExternalConnectionPool.startUp(ExternalConnectionPool.java:135)
        at oracle.toplink.essentials.threetier.ServerSession.connect(ServerSession.java:451)
        at oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl.login(DatabaseSessionImpl.java:616)
        at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:282)
        at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:229)
        at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:93)
        at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:126)
        at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:120)
        at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:91)
        at org.springframework.orm.jpa.JpaTransactionManager.createEntityManagerForTransaction(JpaTransactionManager.java:392)
        at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:320)
        at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:220)
        at org.springframework.transaction.aspectj.AbstractTransactionAspect.ajc$before$org_springframework_transaction_aspectj_AbstractTransactionAspect$1$2a73e96c(AbstractTransactionAspect.aj:63)
        at org.springframework.samples.petclinic.jpa.EntityManagerClinic.getVets(EntityManagerClinic.java:39)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
        at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:138)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
        at $Proxy19.getVets(Unknown Source)
        at org.springframework.samples.petclinic.web.ClinicController.vetsHandler(ClinicController.java:53)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:421)
        at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:136)
        at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:326)
        at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:313)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713)
        at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)
        at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)
        at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)
        at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221)
        at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122)
        at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111)
        at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
        at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:234)
        at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:29)
        at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:879)
        at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:138)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:175)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:287)
        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:328)
        at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:430)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:151)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:608)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:218)
        at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPhysicalConnection(OracleConnectionPoolDataSource.java:114)
        at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPooledConnection(OracleConnectionPoolDataSource.java:77)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.makeCacheConnection(OracleImplicitConnectionCache.java:1361)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.getCacheConnection(OracleImplicitConnectionCache.java:441)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.getConnection(OracleImplicitConnectionCache.java:336)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:286)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:179)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:159)
        at oracle.oc4j.sql.DataSourceConnectionPoolDataSource.getPooledConnection(DataSourceConnectionPoolDataSource.java:57)
        at oracle.oc4j.sql.xa.EmulatedXADataSource.getXAConnection(EmulatedXADataSource.java:92)
        at oracle.oc4j.sql.spi.ManagedConnectionFactoryImpl.createXAConnection(ManagedConnectionFactoryImpl.java:211)
        at oracle.oc4j.sql.spi.ManagedConnectionFactoryImpl.createManagedConnection(ManagedConnectionFactoryImpl.java:170)
        at com.evermind.server.connector.ApplicationConnectionManager.createManagedConnection(ApplicationConnectionManager.java:1398)
        at oracle.j2ee.connector.ConnectionPoolImpl.createManagedConnectionFromFactory(ConnectionPoolImpl.java:327)
        at oracle.j2ee.connector.ConnectionPoolImpl.access$800(ConnectionPoolImpl.java:98)
        at oracle.j2ee.connector.ConnectionPoolImpl$NonePoolingScheme.getManagedConnection(ConnectionPoolImpl.java:1211)
        at oracle.j2ee.connector.ConnectionPoolImpl.getManagedConnection(ConnectionPoolImpl.java:785)
        at oracle.oc4j.sql.ConnectionPoolImpl.getManagedConnection(ConnectionPoolImpl.java:45)
        at com.evermind.server.connector.ApplicationConnectionManager.getConnectionFromPool(ApplicationConnectionManager.java:1596)
        at com.evermind.server.connector.ApplicationConnectionManager.acquireConnectionContext(ApplicationConnectionManager.java:1541)
        at com.evermind.server.connector.ApplicationConnectionManager.allocateConnection(ApplicationConnectionManager.java:1486)
        at oracle.j2ee.connector.OracleConnectionManager.unprivileged_allocateConnection(OracleConnectionManager.java:238)
        at oracle.j2ee.connector.OracleConnectionManager.allocateConnection(OracleConnectionManager.java:192)
        at oracle.oc4j.sql.ManagedDataSource.getConnection(ManagedDataSource.java:272)
        at oracle.oc4j.sql.ManagedDataSource.getConnection(ManagedDataSource.java:200)
        at oracle.oc4j.sql.ManagedDataSource.getConnection(ManagedDataSource.java:142)
        at oracle.oc4j.sql.ManagedDataSource.getConnection(ManagedDataSource.java:127)
        at oracle.toplink.essentials.jndi.JNDIConnector.connect(JNDIConnector.java:145)
        ... 60 moreAny ideas? I'd really like to see JPA, Spring and oc4j working together?
Thanks,
Eric

Need advise for best practice when using Toplink with external transaction

Hello;
Our project is trying to switch from Toplink control transaction to using External transaction so we can make database operation and JMS operation within a single transaction.
Some of our team try out the Toplink support for external transaction and come up with the following initial recommendation.
Since we are not familar with using external transaction, I would like member of this forum and experts, to help comment on whether these recommendation are indeed valid or in line with the best practice. And for folks that have done this in their project, what did you do ?
Any help will be most appreciated.
Data Access Objects must be enhanced to support reading from a TOPLink unit of work when using an external transaction controller. Developers must consider what impact a global transaction will have on the methods in their data access objects (DAOs).
The following findSomeObject method is representative of a finder in the current implementation of our DAOs. It is not especially designed to execute in the context of a global transaction, nor read from a unit of work.
public findSomeObject(ILoginUser aUser, Expression queryExpression)
ClientSession clientSession = getClientSession(aUser);
SomeObject obj = null;
try
ReadObjectQuery readObjectQuery = new ReadObjectQuery(SomeObject.class);
readObjectQuery.setSelectionCriteria(queryExpression);
obj = (SomeObject)clientSession.executeQuery(readObjectQuery);
catch (DatabaseException dbe)
// throw an appropriate exception
finally
clientSession.release();
if (obj == null)
// throw an appropriate exception
return obj;
However, after making the following changes (in blue) the findSomeObject method will now read from a unit of work while executing in the context of a global transaction.
public findSomeObject(ILoginUser aUser, Expression queryExpression)
Session session = getClientSession(aUser);
SomeObject obj = null;
try
ReadObjectQuery readObjectQuery = new ReadObjectQuery(SomeObject.class);
readObjectQuery.setSelectionCriteria(queryExpression);
if (TransactionController.getInstance().useExternalTransactionControl())
     session = session.getActiveUnitOfWork();
     readObjectQuery.conformResultsInUnitOfWork(); }
obj = (SomeObject)session.executeQuery(readObjectQuery);
catch (DatabaseException dbe)
// throw an appropriate exception
finally
if (TransactionController.getInstance().notUseExternalTransactionControl())
     session.release();
if (obj == null)
// throw an appropriate exception
return obj;
When getting the TOPLink client session and reading from the unit of work in the context of a global transaction, new objects need to be cached.
public getUnitOfWork(ILoginUser aUser)
throws DataAccessException
     ClientSession clientSession = getClientSession(aUser);
     UnitOfWork uow = null;
     if (TransactionController.getInstance().useExternalTransactionControl())
          uow = clientSession.getActiveUnitOfWork();
          uow.setShouldNewObjectsBeCached(true);     }
     else
          uow = clientSession.acquireUnitOfWork();
     return uow;
}

As it generally is with this sort of question there is no exact answer.
The only required update when working with an External Transaction is that getActiveUnitOfWork() is called instead of acquireUnitOfWork() other than that the semantics of the calls and when you use a UnitOfWork is still dependant on the requirements of your application. For instance I noticed that originally the findSomeObject method did not perform a transactional read (no UnitOfWork). Has the requirements for this method changed? If they have not then there is still no need to perform a transactional read, and the method would not need to change.
As for the requirement that new object be cached this is only required if you are not conforming the transactional queries and adds a slight performance boost for find by primary key queries. In order to use this however, objects must be assigned primary keys by the application before they are registered in the UnitOfWork.
--Gordon

Using Toplink with Eclipse - (Newbie question)

If you have (for instance):
* a blank Dynacmic Web Project in Eclipse
* and you have a Workbench Toplink project- say an XML or Database project.
Then you have to save your Toplink project, which spurts out various directories e.g. classes, descriptors, schemas, fooname.mwp etc.
Where do you save this in your Java project - is it at /src? Or someplace else?
I am asking this question because I am having problems when debugging my application - certain xml files cannot be found etc. Anyway I guess I just need to find out if I am getting the basics right for now - so any help will be much appreciated.
PS - Why can't I find a simple tutorial/example showing Eclipse and Toplink - it's all JDeveloper and Ant builds and ahhhhhghghhhgh!

golcarlad,
Hi, try the following EclipseLink JPA examples and tutorials for SE and EE environments - oriented around the Eclipse 3.4 IDE (ant capable but WTP ready)
With these you will be able to fully debug your JPA application both on and off any application server.
If you are still deploying your WAR to Tomcat then the following tutorial on running EclipseLink JPA on Tomcat 6 will help you out. Put your additional orm.xml file alongside persistence.xml if you are using functionality beyond standard JPA.
http://wiki.eclipse.org/EclipseLink/Examples/JPA/Tomcat_Web_Tutorial
From
Help on creating a ServerSession in Eclipse with XML file
"In particular note that there are two META-INF directories - we want to use only the one off of src.
"Make sure that your persistence.xml (and optionaly orm.xml) file is placed off of the src/META-INF directory and not the default WebContent/META-INF dir so that it gets picked up by the servlet classloader from the classes directory."
Other Tutorials:
http://wiki.eclipse.org/EclipseLink/Examples
http://wiki.eclipse.org/EclipseLink/Examples/JPA
http://wiki.eclipse.org/EclipseLink/Examples/JPA/EmployeeXML
http://wiki.eclipse.org/EclipseLink/Examples/JPA/Dynamic
http://wiki.eclipse.org/EclipseLink/Examples/JPA#JPA_Web_Application_Tutorials
http://wiki.eclipse.org/EclipseLink/Examples/JPA/WebLogic_Web_Tutorial
http://wiki.eclipse.org/EclipseLink/Examples/JPA/OC4J_Web_Tutorial
http://wiki.eclipse.org/EclipseLink/Examples/JPA/JBoss_Web_Tutorial
thank you
/michael
Edited by: michael_obrien on Mar 19, 2009 9:19 AM

Using Toplink with Oracle Spatial (missing right parenthesis error)

Hi,
I always get the following error when I try to create spatial query with toplink.
Internal Exception: java.sql.SQLException: ORA-00907: missing right parenthesis
Any idea ? Also, there is no trace of my point in the generated sql....
Here is the generated query:
SELECT ID, [...]
FROM QUEBEC_CITY
WHERE (MDSYS.SDO_NN(GEOMETRY, JGeometry (gtype=1, dim=2, rid=8307, NULL) = 'TRUE')
ORDER BY ID ASC
Here is my code... :
double[] coord = new double[]{-71.25163d, 46.8527d};
JGeometry point = JGeometry.createPoint(coord, 2, 8307);
SpatialOperator nearestNeighbor = SpatialOperator.nearestNeighbor(session);
ReadAllQuery query = new ReadAllQuery(UrbanEdgeDescriptor.class);
ExpressionBuilder eb = query.getExpressionBuilder();
Expression geom = eb.get("geometry");
query.setSelectionCriteria(nearestNeighbor.buildExpression(geom, point));
query.addAscendingOrdering("id");
List<UrbanEdgeDescriptor> results = (List)db.getSession().executeQuery(query);
System.out.println(results!=null);

The problem is the toString() on JGeometry. It does not print out a complete description the database can use inline. It produces:
JGeometry (gtype=1, dim=2, rid=8307
To get JGeometry types to work in your queries the easiest solution is to use parameter binding so the literal representation is not used.
Doug

Using Toplink with Servlets in a Clustered application server

I am having some problems with Toplink.
Basically, I have a collection of HttpServlets that manipulate a domain object and its various collections of objects. The general technique is to place the domain object in the HttpSession, and have each Servlet modify this object by retrieving it, modifying it, and storing it when necessary. The problem is that since this application is running in a clustered environment, the object in the session may or may not be the same object returned from Toplink. It may be a serialized clone of the object from another server on the cluster.
This has caused several problems. First, if I am using indirction for the collections, when the domain object is deserializaed, it throws an exception when it tries to instantiate the indirection. Next, when trying to store the object, it is not registered with a unit of work, and I am not sure how to properly account for this. Third, there is a many to many relationship. The user may pick one such object, and add it to the domain object being manipulated. This seems to cause problems when the object is read from Toplink, and added to the domain object that is a serialized clone.
Anyway, my question is, what is the general pattern for handling an object being manipulated on a HttpSession in a clustered environment, where this object(s) may or may not be the actual objects returned from Toplink? My goal is to have a factory return one DatabaseSession per cluster server, and be able to load, store, and manipulate these objects in the HttpSession.
Here is an attempt at code:
import java.io.*;
import java.util.*;
import oracle.toplink.expressions.*;
import oracle.toplink.sessions.*;
public class DataAccess
private static Project project = new MyToplinkProject();
private static DatabaseSession session;
private UnitOfWork unit;
public DataAccess()
unit = getDatabaseSession().acquireUnitOfWork();
public ArrayList getAllCustomers()
Vector v = (Vector) session.readAllObjects(Customer.class);
return new ArrayList(v);
public Customer getCustomerForUpdate(Customer c)
Customer custCopy = (Customer) unit.readObject(c);
return (Customer) unit.registerObject(c);
public Form getCustomer(String id)
ExpressionBuilder builder = new ExpressionBuilder();
Expression exp = builder.get("id").equal(id);
return (Customer) session.readObject(Customer.class, exp);
public void saveCustomer(Customer cust)
unit.deepMergeClone(cust);
unit.commitAndResume();
private synchronized DatabaseSession getDatabaseSession()
if (session == null)
session = project.createDatabaseSession();
session.login();
session.setLog(new PrintWriter(System.out));
session.logMessages();
return session;
public void destruct()
release();
public void release()
unit.release();
session.release();
Anyway, from this code I hope you can see what I am trying to do. The basic idea is that a Customer object provided for store and update may or may not be a serialized copy. Also, the object returned from a read may be serialized before the indirction is attempted.
Thanks for any help,
Jason Wilson

Hi Jason
A single static DatabaseSession and a single static UnitOfWork is not the recommended way of working with TopLink from a servlet. Our recommendation is that you create a single ServerSession object and that every time a servlet needs to interact with a TopLink Session, the servlet first acquires a ClientSession from this ServerSession object and possibly acquires UnitOfWork from the ClientSession. A UnitOfWork is not intended to be shared by servlets, or by different clients.
Basically, what you're attempting to do with the DatabaseSession is something we would recommend that you do instead with a ServerSession/ClientSessions combination.
As for working with persistent objects that you store in an HttpSession, I will try to give you some relevant background. First off, the UnitOfWork is intended to be used to manage the changes to a set of objects in a SINGLE TRANSACTION. It is always much easier to manage if these transactions are short-lived (ie if there is one transaction per ServletRequest.
However, the fact that you are talking about storing objects in the HttpSession makes me think that you are also considering long-running transactions that are may be spread out over several ServletRequests. You should definately consider this decision very carefully. If you want to continually edit an object that is stored in the HttpSession, then we need to consider how to manage when the object's changes should be committed to the database and how to manage concurrency when two users have the same object in their respective HttpSession objects.
One idea is not to store the actual object in the HttpSession but instead to store the "id" of the object (something that you can use to find the correct object when the same user makes another request). So servlets always:
-acquireClientSession
-find the object that they are working with (based on information in the HttpSession)
-if the object is to be edited then a UnitOfWork provides clones of the object (this isolates you from changes that some other user makes to the same object)
-at the end, commit the changes to the object.
When the user makes another request, the object they read will have their changes. So, functionally, this is the same as storing the actual object in the HttpSession, except TopLink can provide proper ACID behavior for any updates that you decide to make. And don't worry about the added "expense" of having to query at the beginning of each servlet request; if you are storing the "id" of the object in your HttpSession, then you a simple cache hit is all that is required to get back the correct object. You don't have to go the database at all.
JIM

Best Practices of using AJAX with JSF : BluePrints or Ajax4Jsf ?

am a newbie to AJAX4JSF . I think it provides Rapid Application Development (RAD) just by using tags like a4j: without the need to develop complex JSF Custom Components as shown in BluePrints Catalog
https://bpcatalog.dev.java.net/ajax/jsf-ajax/
I understand the purpose of developing JSF Custom components as Reusable for using with AJAX. But its complex and requires lot of coding i.e. PhaseListeners and Managed Beans. There should be easy way to do this especially our project needs RAD tool like AJAX4JSF.
Any suggestions will be highly appreciated
Regards
Bansi

Bansi, you are trying to compare orange-to-apple. Blue print catalog is a historical retrospection about what people thought about AJAXifying JSF in the past. Currently, the playground has been moved to the jsf-extension project. Look for DynaFaces there.

Using TopLink with ADF?

I've downloaded the JDeveloper 10g preview, and I'm interested in the provided ADF features. The online Help says "When you want to create ADF application clients that work with other business services, including... TopLink mappings... see the available documentation on the JDeveloper page of OTN", but I don't see this documentation? Is it available yet? If so, could someone please post a link?
Thanks!

Duh, sorry, that "more" link sure is helpful...
http://technet.oracle.com/products/jdev/collateral/tutorials/9050/toplinkdatabinding_tut.html

How to implement the pessimistic locking using toplink with sybase

we want to allocate the unique primary key to each row when many user try to insert the records concurrently..So what we are trying to do is we calculate the maximum of Primary Key and incremented it by 1. Now we want to Apply the locking concept on the so that unique key will be allocated to each newly inserted row
Can you please tell me
1. how we can genrate unique primary key in toplink using sybase?
2.how to implement the pessimistic or optimistic locking ?which one will be preferable?

Hi brother
I think that this link can help you
http://download-east.oracle.com/docs/cd/A97688_16/toplink.903/b10064/database.htm#1007986
Good luck

Using Toplink with JSF

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