NullPointerException in MinusNode with EJB-QL, bug?

Hi, I have an EJB 2.1 application with a simple EJB-QL query:
SELECT OBJECT(a) from ApprovalDataBean a WHERE a.approvalid=?1 and (a.status=-1 or a.status=0 or a.status=-2)
This query generates the following error in the query parser of Toplink.
I Use OC4J 10.1.3.3.
Regards,
Tomas
Nested exception is:
java.lang.NullPointerException
at oracle.toplink.internal.parsing.MinusNode.generateExpression(MinusNode.java:31)
at oracle.toplink.internal.parsing.EqualsNode.generateExpression(EqualsNode.java:43)
at oracle.toplink.internal.parsing.OrNode.generateExpression(OrNode.java:34)
at oracle.toplink.internal.parsing.AndNode.generateExpression(AndNode.java:31)
at oracle.toplink.internal.parsing.WhereNode.generateExpression(WhereNode.java:26)
at oracle.toplink.internal.parsing.ParseTree.generateExpression(ParseTree.java:153)
at oracle.toplink.internal.parsing.ParseTree.setSelectionCriteriaForQuery(ParseTree.java:326)
at oracle.toplink.internal.parsing.EJBQLParseTree.populateQuery(EJBQLParseTree.java:64)
at oracle.toplink.internal.parsing.ejbql.EJBQLParserFactory.populateQuery(EJBQLParserFactory.java:36)
at oracle.toplink.queryframework.EJBQLCall.populateQuery(EJBQLCall.java:168)
at oracle.toplink.internal.parsing.ejbql.EJBQLCallQueryMechanism.buildSelectionCriteria(EJBQLCallQueryMechanism.java:61)
at oracle.toplink.queryframework.DatabaseQuery.buildSelectionCriteria(DatabaseQuery.java:293)
at oracle.toplink.queryframework.ObjectLevelReadQuery.prePrepare(ObjectLevelReadQuery.java:1592)
at oracle.toplink.queryframework.ObjectLevelReadQuery.checkPrePrepare(ObjectLevelReadQuery.java:574)
at oracle.toplink.queryframework.ObjectLevelReadQuery.isLockQuery(ObjectLevelReadQuery.java:1495)
at oracle.toplink.internal.ejb.cmp.finders.Finder.checkLockQuery(Finder.java:285)

An update on this:
This EJB-QL query:
SELECT OBJECT(a) from ApprovalDataBean a WHERE (a.status>-3) and a.approvalid=?1
Generates this SQL:
SELECT ID, STATUS, APPROVALID, APPROVALDATA, ENDENTITYPROFILEID, REQUESTDATA, REQADMINCERTISSUERDN, REQUESTDATE, APPROVALTYPE, EXPIREDATE, REQADMINCERTSN
, REMAININGAPPROVALS, CAID FROM APPROVALDATA WHERE (STATUS > (APPROVALID = -306188630))
Which in turn naturally generates this error:
Caused by: Exception [TOPLINK-4002] (TopLink (Oracle OC4J CMP) - 10g Release 3 (10.1.3.3.0) (Build 070608)): oracle.toplink.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: ORA-00907: missing right parenthesis
This surely looks like a bug to me. Are there any workaround?
Cheers,
Tomas

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*** Using port 7101 ***
C:\Users\Administrador\AppData\Roaming\JDeveloper\system11.1.1.1.33.54.07\DefaultDomain\bin\startWebLogic.cmd
[waiting for the server to complete its initialization...]
JAVA Memory arguments: -Xms256m -Xmx512m -XX:CompileThreshold=8000 -XX:PermSize=128m -XX:MaxPermSize=512m
WLS Start Mode=Development
CLASSPATH=C:\Oracle\MIDDLE~1\patch_wls1031\profiles\default\sys_manifest_classpath\weblogic_patch.jar;C:\Oracle\MIDDLE~1\patch_jdev1111\profiles\default\sys_manifest_classpath\weblogic_patch.jar;C:\Oracle\MIDDLE~1\JDK160~1\lib\tools.jar;C:\Oracle\MIDDLE~1\utils\config\10.3.1.0\config-launch.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\weblogic_sp.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\weblogic.jar;C:\Oracle\MIDDLE~1\modules\features\weblogic.server.modules_10.3.1.0.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\webservices.jar;C:\Oracle\MIDDLE~1\modules\ORGAPA~1.0/lib/ant-all.jar;C:\Oracle\MIDDLE~1\modules\NETSFA~1.0_1/lib/ant-contrib.jar;C:\Oracle\MIDDLE~1\JDEVEL~1\modules\oracle.jrf_11.1.1\jrf.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\common\eval\pointbase\lib\pbclient57.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\xqrl.jar
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java version "1.6.0_11"
Java(TM) SE Runtime Environment (build 1.6.0_11-b03)
Java HotSpot(TM) Client VM (build 11.0-b16, mixed mode)
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23/09/2009 05:21:23 PM oracle.mds.internal.lcm.logging.MDSLCMLogger info
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[EL Config]: 2009-09-23 17:21:26.545--ServerSession(30842787)--Thread(Thread[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads])--The target entity (reference) class for the one to many mapping element [private java.util.List oracle.Employees.departmentsList] is being defaulted to: class oracle.Departments.
[EL Config]: 2009-09-23 17:21:26.546--ServerSession(30842787)--Thread(Thread[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads])--The target entity (reference) class for the many to one mapping element [private oracle.Employees oracle.Employees.employees] is being defaulted to: class oracle.Employees.
[EL Config]: 2009-09-23 17:21:26.546--ServerSession(30842787)--Thread(Thread[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads])--The primary key column name for the mapping element [private oracle.Employees oracle.Employees.employees] is being defaulted to: EMPLOYEE_ID.
[EL Config]: 2009-09-23 17:21:26.546--ServerSession(30842787)--Thread(Thread[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads])--The target entity (reference) class for the one to many mapping element [private java.util.List oracle.Employees.employeesList] is being defaulted to: class oracle.Employees.
[EL Finer]: 2009-09-23 17:21:26.547--ServerSession(30842787)--Thread(Thread[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads])--Class [oracle.Departments] registered to be processed by weaver.
[EL Finer]: 2009-09-23 17:21:26.547--ServerSession(30842787)--Thread(Thread[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads])--Class [oracle.Employees] registered to be processed by weaver.
23/09/2009 05:21:34 PM oracle.mds.internal.lcm.logging.MDSLCMLogger info
INFO: Identificador de Aplicación : wsm-pm
23/09/2009 05:21:34 PM oracle.mds.internal.lcm.logging.MDSLCMLogger info
INFO: "Servicios de Metadatos: Archivo de metadatos (MAR) no encontrado."
23/09/2009 05:21:38 PM oracle.adf.share.config.ADFConfigFactory getInstance
INFO: ADF Config instance implementation in use is : oracle.adf.share.config.MDSConfigFactory
23/09/2009 05:21:46 PM oracle.adf.mbean.share.connection.ConnectionsRuntimeMXBeanImpl getNonCachedConnectionsContext
INFO: Registering Connection Runtime MBean
23/09/2009 05:21:46 PM oracle.adf.share.jndi.MDSBackingStore isReadOnlyMDSStore
INFO: Read only backing store
23/09/2009 05:21:47 PM oracle.adf.share.jndi.MDSBackingStore isReadOnlyMDSStore
INFO: Read only backing store
23/09/2009 05:21:47 PM oracle.adf.share.jndi.MDSBackingStore isReadOnlyMDSStore
INFO: Read only backing store
<23/09/2009 05:21:50 PM COT> <Notice> <LoggingService> <BEA-320400> <The log file C:\Users\Administrador\AppData\Roaming\JDeveloper\system11.1.1.1.33.54.07\DefaultDomain\servers\DefaultServer\logs\DefaultDomain.log will be rotated. Reopen the log file if tailing has stopped. This can happen on some platforms like Windows.>
<23/09/2009 05:21:50 PM COT> <Notice> <LoggingService> <BEA-320401> <The log file has been rotated to C:\Users\Administrador\AppData\Roaming\JDeveloper\system11.1.1.1.33.54.07\DefaultDomain\servers\DefaultServer\logs\DefaultDomain.log00006. Log messages will continue to be logged in C:\Users\Administrador\AppData\Roaming\JDeveloper\system11.1.1.1.33.54.07\DefaultDomain\servers\DefaultServer\logs\DefaultDomain.log.>
<23/09/2009 05:21:50 PM COT> <Notice> <Log Management> <BEA-170027> <The Server has established connection with the Domain level Diagnostic Service successfully.>
23/09/2009 05:21:51 PM oracle.wsm.audit.Auditor <init>
INFO: Created J2EE application auditor for componentType=oracle.security.jps.internal.audit.AuditServiceImpl$Auditor@213b6e
23/09/2009 05:21:55 PM oracle.adf.share.config.ADFMDSConfig parseADFConfiguration
INFO: Configuration file:/META-INF/adf-config.xmlcannot not be read by MDS. Reading directly from the classpath
<23/09/2009 05:21:55 PM COT> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to ADMIN>
<23/09/2009 05:21:55 PM COT> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RESUMING>
<23/09/2009 05:21:55 PM COT> <Notice> <Server> <BEA-002613> <Channel "Default[6]" is now listening on 127.0.0.1:7101 for protocols iiop, t3, ldap, snmp, http.>
<23/09/2009 05:21:55 PM COT> <Notice> <Server> <BEA-002613> <Channel "Default[2]" is now listening on fe80:0:0:0:246d:98bd:32fc:bf08:7101 for protocols iiop, t3, ldap, snmp, http.>
<23/09/2009 05:21:55 PM COT> <Notice> <Server> <BEA-002613> <Channel "Default[1]" is now listening on fe80:0:0:0:790b:d0ee:a329:57db:7101 for protocols iiop, t3, ldap, snmp, http.>
<23/09/2009 05:21:55 PM COT> <Notice> <Server> <BEA-002613> <Channel "Default[5]" is now listening on 0:0:0:0:0:0:0:1:7101 for protocols iiop, t3, ldap, snmp, http.>
<23/09/2009 05:21:55 PM COT> <Notice> <Server> <BEA-002613> <Channel "Default[3]" is now listening on fe80:0:0:0:28a5:117:3611:5367:7101 for protocols iiop, t3, ldap, snmp, http.>
<23/09/2009 05:21:55 PM COT> <Notice> <Server> <BEA-002613> <Channel "Default[4]" is now listening on fe80:0:0:0:0:5efe:c0a8:66:7101 for protocols iiop, t3, ldap, snmp, http.>
<23/09/2009 05:21:55 PM COT> <Notice> <Server> <BEA-002613> <Channel "Default" is now listening on 192.168.0.102:7101 for protocols iiop, t3, ldap, snmp, http.>
<23/09/2009 05:21:55 PM COT> <Notice> <WebLogicServer> <BEA-000331> <Started WebLogic Admin Server "DefaultServer" for domain "DefaultDomain" running in Development Mode>
<23/09/2009 05:21:55 PM COT> <Warning> <Server> <BEA-002611> <Hostname "Crht-PC", maps to multiple IP addresses: 192.168.0.102, fe80:0:0:0:246d:98bd:32fc:bf08%12, fe80:0:0:0:28a5:117:3611:5367%13>
<23/09/2009 05:21:56 PM COT> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RUNNING>
<23/09/2009 05:21:56 PM COT> <Notice> <WebLogicServer> <BEA-000360> <Server started in RUNNING mode>
[Running application Application9 on Server Instance DefaultServer...]
DefaultServer startup time: 64580 ms.
DefaultServer started.
<23/09/2009 05:22:08 PM COT> <Warning> <J2EE> <BEA-160195> <The application version lifecycle event listener oracle.security.jps.wls.listeners.JpsAppVersionLifecycleListener is ignored because the application Application9 is not versioned.>
23/09/2009 05:22:08 PM JpsApplicationLifecycleListener Migrate Application Credential Store
ADVERTENCIA: Overwriting credentials is allowed in application credential store migration with Weblogic server running in Development Mode and system property 'jps.app.credential.overwrite.allowed' set to true
<23/09/2009 05:22:09 PM COT> <Error> <Deployer> <BEA-149265> <Failure occurred in the execution of deployment request with ID '1253744528059' for task '0'. Error is: 'weblogic.application.ModuleException: Exception preparing module: EJBModule(Application9-Project1-ejb)
weblogic.application.ModuleException: Exception preparing module: EJBModule(Application9-Project1-ejb)
     at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:454)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
     at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:387)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:58)
     Truncated. see log file for complete stacktrace
Exception [EclipseLink-28010] (Eclipse Persistence Services - 1.1.1.v20090430-r4097): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: PersistenceUnitInfo Project1 has transactionType JTA, but doesnt have jtaDataSource.
     at org.eclipse.persistence.exceptions.EntityManagerSetupException.jtaPersistenceUnitInfoMissingJtaDataSource(EntityManagerSetupException.java:154)
     at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:798)
     at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:216)
     at weblogic.deployment.PersistenceUnitInfoImpl.createEntityManagerFactory(PersistenceUnitInfoImpl.java:343)
     at weblogic.deployment.PersistenceUnitInfoImpl.createEntityManagerFactory(PersistenceUnitInfoImpl.java:323)
     Truncated. see log file for complete stacktrace
>
<23/09/2009 05:22:09 PM COT> <Warning> <Deployer> <BEA-149004> <Failures were detected while initiating deploy task for application 'Application9'.>
<23/09/2009 05:22:09 PM COT> <Warning> <Deployer> <BEA-149078> <Stack trace for message 149004
weblogic.application.ModuleException: Exception preparing module: EJBModule(Application9-Project1-ejb)
     at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:454)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
     at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:387)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:58)
     Truncated. see log file for complete stacktrace
Exception [EclipseLink-28010] (Eclipse Persistence Services - 1.1.1.v20090430-r4097): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: PersistenceUnitInfo Project1 has transactionType JTA, but doesnt have jtaDataSource.
     at org.eclipse.persistence.exceptions.EntityManagerSetupException.jtaPersistenceUnitInfoMissingJtaDataSource(EntityManagerSetupException.java:154)
     at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:798)
     at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:216)
     at weblogic.deployment.PersistenceUnitInfoImpl.createEntityManagerFactory(PersistenceUnitInfoImpl.java:343)
     at weblogic.deployment.PersistenceUnitInfoImpl.createEntityManagerFactory(PersistenceUnitInfoImpl.java:323)
     Truncated. see log file for complete stacktrace
>
[05:22:09 PM] Weblogic Server Exception: weblogic.application.ModuleException: Exception preparing module: EJBModule(Application9-Project1-ejb)
[05:22:09 PM] Caused by: java.lang.Throwable: Substituted for missing class Exception [EclipseLink-28010] (Eclipse Persistence Services - 1.1.1.v20090430-r4097) - org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: PersistenceUnitInfo Project1 has transactionType JTA, but doesnt have jtaDataSource.
[05:22:09 PM] See server logs or server console for more details.
oracle.jdeveloper.deploy.DeployException: oracle.jdeveloper.deploy.DeployException: oracle.jdeveloper.deploy.DeployException: Deployment Failed[05:22:10 PM] #### Deployment incomplete. ####
oracle.jdeveloper.deploy.DeployException: oracle.jdeveloper.deploy.DeployException: oracle.jdeveloper.deploy.DeployException: Deployment Failed
     at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.doDeploymentAction(Jsr88RemoteDeployer.java:341)
     at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.deployImpl(Jsr88RemoteDeployer.java:235)
     at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
     at oracle.jdevimpl.deploy.fwk.WrappedDeployer.deployImpl(WrappedDeployer.java:39)
     at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
     at oracle.jdeveloper.deploy.common.BatchDeployer.deployImpl(BatchDeployer.java:82)
     at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
     at oracle.jdevimpl.deploy.fwk.WrappedDeployer.deployImpl(WrappedDeployer.java:39)
     at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
     at oracle.jdevimpl.deploy.fwk.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:442)
     at oracle.jdeveloper.deploy.DeploymentManager.deploy(DeploymentManager.java:209)
     at oracle.jdevimpl.runner.adrs.AdrsStarter$6$1.run(AdrsStarter.java:1469)
Caused by: oracle.jdeveloper.deploy.DeployException: oracle.jdeveloper.deploy.DeployException: Deployment Failed
     at oracle.jdevimpl.deploy.common.Jsr88DeploymentHelper.deployApplication(Jsr88DeploymentHelper.java:483)
     at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.doDeploymentAction(Jsr88RemoteDeployer.java:332)
     ... 11 more
Caused by: oracle.jdeveloper.deploy.DeployException: Deployment Failed
     at oracle.jdevimpl.deploy.common.Jsr88DeploymentHelper.deployApplication(Jsr88DeploymentHelper.java:465)
     ... 12 more
#### Cannot run application Application9 due to error deploying to DefaultServer.
[Application Application9 stopped and undeployed from Server Instance DefaultServer]
Please help me!!
thnks!!

How to use ADF Query search with EJB 3.0

Hi,
In ADF guide http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/web_search_bc.htm#CIHIJABA
The steps to create query search with ADF Business Components says:
"+From the Data Controls panel, select the data collection and expand the Named Criteria node to display a list of named view criteria.+"
But with EJB, I'm not able to find Named Criteria node. Can we use ADF query search component with EJB? If yes, can you please show me some example, tutorial etc.?
Thanks
BJ

For EJBs you'll need to implement the query model on your own.
An example of how the model should look like is in the ADF Faces components demo.
http://jdevadf.oracle.com/adf-richclient-demo/faces/components/query.jspx
Code here:
http://www.oracle.com/technology/products/adf/adffaces/11/doc/demo/adf_faces_rc_demo.html

Bean-managed transaction with EJB 3.0

Hi,
I try to get a bean-managed transaction example running with EJB 3.0 under GlassFish v2ur2.
In order to demarcate the scenario I have to get me the UserTransaction which I get from the SessionContext. I would like to use it then like: UserTransaction ut = context.getUserTransaction();
I tried to get the SessionContext with the help of the EJB method setSessionContext which should be called by the container after instance creation.
However, setting a log output into that method does not show any call of this method.
So, how can I get this method called or is there another way to get the SessionContext for the UserTransaction to work ?
Are there any good and fully implemented examples for bean-managed transactions ?
Thanks for your help.
Regards

I found the solution for that my SessionContext was NULL and I could not use the UserTransaction.
The reason for it is that I injected the EJB with @EJB into my servlet and did a MyBean mybean = new MyBean();
That leads to a SessionContext which is NULL within my EJB.
If I use it without instantiating it it works fine.
Again, thanks for your help. At least it pointed me into the right direction.
Regards

Problem with EJB skeleton classloader

Hi
We have been migrating an enterprise application from Weblogic 7 to 9.2 and experienced strange problem with EJBs. Our EAR contains (beside the other elements) an EJB module with EJBs and some common POJO classes inside. At the deploy and run phase everything seems working fine, but when the remote client invokes a method which receives one of the common classes as a parameter we get ClassNotFoundException on the server side (talking precisely, the exception is thrown from the EJB skeleton, trying to unmarshall the parameter).
It seems that our EJB's skeletons do not see the classes from EAR. We have tried moving the common classes to the APP-INF/lib directory or placing them at the root of EAR archive and adding reference in Manifest file of EJB module and it won't help.
The only workaround we've found is to add the missing classes to the server classpath but this is unacceptable (however, it works).
We are not using any custom classloader hierarchy.
The other JARs have no problem loading the content of our EJB module (including the common classes, which cause the problem).
So, why is the RMI classloader ommiting our application contents?

The problem was fixed by upgrading to version 9.2.1

How to master good design with EJB and JSP?

I use JSP to calling EJB. But the .jsp file is complex and it's difficult to maintain...I just want to work higher efficent with EJB,JSP and JavaBean. I want to know is there a good design with EJB and JSP? and is there any good material about MVC for EJB,JSP and JavaBean?

You should read the J2EE blueprint available on this website. Better download the PDF, and print it for yourself so you can read it anytime.

JSF combined with EJB, how??

Hi @ll,
I have been trying for some days to combine my JSF pages with EJB Session Beans, but I haven't really found a working way to do it.
First, I had my session bean directly as the backing bean for the JSF page, but I read somewhere that this isn't "allowed", so I created a helper bean as managed bean. This is now the backing bean for the jsf page and has as attribute the session bean.
My helper bean:
public class ManagedHelperBean {
@EJB private JDDACReaderBeanRemote reader;
public JDDACReaderBeanRemote getReader() {
     return reader;
public void setReader(JDDACReaderBeanRemote reader) {
     this.reader = reader;
}Part of my faces-config.xml
<managed-bean>
<managed-bean-name>helper</managed-bean-name>
<managed-bean-class>com.company.ManagedHelperBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>Part of my jsp page:
<h:outputText value="#{helper}"/>
<h:outputText value="#{helper.reader}"/>Now, the first output in the jsp page works, the second one doesn't. Why can't the property reader be accessed?? What is the correct way to combine JSF with EJB?
Kind regards,
Wiebke

Hello,
I faced the same problem, but on a Weblogic 10 server.
The problem with Weblogic 10 is, even if it's "supposed" to be a EE5 compliant server, it is not.
As described here http://e-docs.bea.com/wls/docs100/webapp/annotateservlet.html , there is no Dependency Injection in JSF managed beans:
The web container will not process annotations on classes like Java Beans and other helper classes.
But, WL 10 offers DI on Servlets, Filters and Listeners.
Here is how I solved it (probably not the best way, but it works for me):
- created a filter with a list of EJB injected (as it works). For every filtered request, set a list of known (enum) as request attributes mapped each to a EJB service:
public class EJBInjectFilter implements Filter {
@EJB
private MyEJBService ejbRef;
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException,
               ServletException {
log.debug("Setting EJB ref into request as attribute ");
          req.setAttribute(ServiceEnum.MY_EJB_SERVICE.toString(), ejbRef);
          chain.doFilter(req, resp);
- for every managed bean who needs a service you can do something like:
(MyEJBService) ((HttpServletRequest) FacesContext.getCurrentInstance().
               getExternalContext().getRequest()).getAttribute(ServiceEnum.MY_EJB_SERVICE.toString())
to get a reference to service.
I agree it is a totally not elegant solution. But why does WL 10 say it's a full JEE5 compliant server, and though does not provide DI for managed beans?
A drawbacks I could think of is performance slow-down (for every request, apply filter, set list of attributes + references into request) - probably it does take some time.
Let me know your thoughts.
Edited by: cosminj on Nov 20, 2007 8:16 AM

Creating library file with ejb

Can anyone suggest me the process by which we can create a library file with ejb? I am new to the ejb environment and i need some guidance regarding this.

Could you be more specific about what you mean by library file? Are you asking about how to package classes used by ejb components outside of the ejb-jar itself?
--ken

Apple Released iOS 7.1 with Major AirPlay Bug Fix

Apple released iOS 7.1 with interface refinements, bug fixes, improvements and new features on Monday. But has the Airplay bug been fixed?
During the test of X-Mirage, we have found that AirPlay on iOS 7 is not as stable as on iOS 6 and we have reported a serious bug to Apple:
iOS 7 BUG – The devices stop sending mirroring data to Apple TV or X-Mirage one minute after iOS devices auto-locks
https://discussions.apple.com/thread/5468657
After using the iOS 7.1 today, we find that Apple has fixed the bug and AirPlay is more stable than before, so our distinguished X-Mirage users, you can update to iOS 7.1 freely and enjoy more fantastic AirPlay Mirroring and Streaming services. Getting the update is easy. Go to Settings. Select General. And tap Software Update.

thanks for the information?

Do i have to use JNDI with EJBS?

Hi
I want to use JNDI to lookup a system which i will send messages to using JMS. I would like to have some java classes on Tomcat to do the job. But...whenever i hear about JNDI it is always in relation to EJBs. Can i only use JNDI with EJBS?
If i can use JNDI is there anything important i need to know about.
Thanks in advance!
San H.

You can definitely use JNDI outside of EJB's - in particular, it's a great interface for dealing with LDAP servers, even securely, and can also be used for DNS interfacing, COS, RMI registries, etc.
While JNDI was chosen as the method by which J2EE components can locate other components in a distributed environment, it's by no means limited to that task :) It's a wonderful API, and in terms of things you need to know, most everything is covered fairly well at the JNDI tutorial in the various trails that are mapped out there.
http://java.sun.com/products/jndi/tutorial/
Good luck!
James
James Manning | Principal Engineer
Porivo Technologies, Inc.
919.806.0566 | [email protected]
http://www.porivo.com/
Measuring end-to-end Web performance.
Register for a FREE Performance appraisal:
http://www.porivo.com/peerReview/eval.html

Do i have to use JMS with EJBS?

Hi
I want to use JMS as a messaging system (a queue) between my system and someone elses. I would like to have some java classes on Tomcat to do the job. But...whenever i hear about JMS i always hear it in relation to EJBs. Can i only use JMS with EJBS?
If i can use JMS is there anything important i need to know about.
Thanks in advance!
San H.

As far as I understand you are use JNDI and JMS is not bound with EJB's. These are java API's which are independent. Like JDBC you can use with Servlets, Applets, standalone applications, EJB, JMS etc etc.......
In the same way you can use JNDI and JMS with diferent API. And the important feature of Java is that all java API interact with each other when these are independent. I would appricate comments of everyone......................Thanks

How to use Java WebStart with EJB ?

hi forum...
how to use Java WebStart with EJB ? examples ?
thanks
mindu

Greetings,
hi forum...
how to use Java WebStart with EJB ? examples ?Well, for starters these are complementing, not 'cooperating', technologies. I presume, since EJB's do not - directly, at least - communicate with a web browser, that you intend for "Java WebStart" to somehow invoke an EJB?? Java WebStart is a technology for running client-side (Java) applications from the web browser - perceptively, the application resides on the server, but technically it, like an applet, is downloaded to the client and run there. Unlike an applet, however, it is not constrained by "sandbox" restrictions and does not have to be re-downloaded each time it is invoked - though the process allows for automagically updating the client-side with new versions of the application. ;) So, with this in mind, to "use Java WebStart with EJB" means little more than deploying an EJB client application with Java WebStart as the distribution channel.
thanks
minduRegards,
Tony "Vee Schade" Cook

EJBs with .ejb extension

Please let me know when/how/where can i have EJBs with .ejb extension?

It's a Weblogic thing. The tool mentioned in the linked post, EJBgen, is similar to XDoclet in that you use special annotations in a single file that is parsed to generate all of the EJB interfaces. The .ejb suffix is commonly used for these files.

How integrate JAAS with EJB Server?

I want to use JAAS to create a security Handler for an open source EJB Server. Does anyone have some suggestions on how best to integrate this with EJB's (using EJB 1.1 for now)?
Any ideas, or problems you might see, or things to be careful of are all welcome!

Weblogic 6 actually provides this as an example. They use JAAS login modules for authentication purposes. I don't think this integration is too difficult. In integrating authorization I believe they just delegate to one of their security realms.

How update with EJB

Hi all,
is it possible to update with EJB CMP?? If yes... how?
Thanks,
Vito

Hi Vito,
Why not, we can do that. Please refer some of the awesome links as i am listing below,
Concepts of CMP:
http://www.caucho.com/resin-3.0/cmp/tutorial/index.xtp
http://java.sun.com/products/jdo/JDOCMPFAQ.html
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/7d5db590-0201-0010-dd93-9ec216811b9e
Some examples and source code :
http://java.sun.com/j2ee/sdk_1.3/1.3_01/techdocs/release/CMP-RI.html
http://java.sun.com/developer/technicalArticles/ebeans/EJB20CMP/index.html
I hope these will be good enough clear your doubts, if feel necessary reply back.
Regards,
Guru.

NullPointerException in MinusNode with EJB-QL, bug?

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