[JBoss Seam] - Re: Double authentication in different parts of a site
by p.chevillon
Hello,
I have a other problem with my authentication. My idea was to extend RuleBasedIdentity and so create ECIdentity class.
Here is my program:
component.xml
<security:identity
| class="ecidentity"
| authenticate-method="#{authenticator.authenticate}"
| security-rules="#{securityRules}"/>
|
ECIdentity.java
@Name("ecidentity")
| @Scope(SESSION)
| @Intercept(InterceptionType.AFTER_RESTORE_VIEW)
| @Startup
| public class ECIdentity extends RuleBasedIdentity {
|
| String role = null;
|
|
| public String login() {
|
|
| System.err.println("First login");
|
| return super.login();
|
| }
| }
|
Authenticator.java
@Name("authenticator")
| public class Authenticator {
| @Logger Log log;
|
| @In(value="ecidentity") ECIdentity ecIdentity;
|
| @In EntityManager entityManager;
|
| @In("#{messages['ErrorOnLogin']}") private String LoginError;
|
| public boolean authenticate() {
|
| System.err.println("First authenticate");
| System.err.println("Username = "+ECIdentity.instance().getUsername());
|
| try {
| String hashedPassword = Util.createPasswordHash("MD5", Util.BASE64_ENCODING, null, null,ECIdentity.instance().getPassword());
|
| Mb member = (Mb) entityManager.createQuery(
| "from Mb where login = :username and passwd = :password")
| .setParameter("username", ECIdentity.instance().getUsername())
| .setParameter("password", hashedPassword)
| .getSingleResult();
|
| return true;
| }
| catch (NoResultException ex) {
| FacesMessages.instance().add(LoginError);
| return false;
| }
| }
| }
|
And when I submit (the action performed is #{ecidentity.login} ), I get the following error message in the console:
15:46:53,967 ERROR [STDERR] First login
| 15:46:54,386 ERROR [STDERR] First authenticate
| 15:46:54,387 ERROR [STDERR] Username = null
| 15:46:54,411 ERROR [SeamLoginModule] Error invoking login method
| javax.faces.el.EvaluationException: Exception while invoking expression #{authenticator.authenticate}
| at org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:153)
| at org.jboss.seam.actionparam.ActionParamBindingHelper.invokeTheExpression(ActionParamBindingHelper.java:58)
| at org.jboss.seam.actionparam.ActionParamMethodBinding.invoke(ActionParamMethodBinding.java:75)
| at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:148)
| at org.jboss.seam.security.jaas.SeamLoginModule.login(SeamLoginModule.java:104)
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
|
|
| ...
| ...
|
| Caused by: java.lang.NullPointerException
| at org.jboss.security.Util.createPasswordHash(Util.java:407)
| at org.jboss.security.Util.createPasswordHash(Util.java:378)
| at com.easycity.ejb.Authenticator.authenticate(Authenticator.java:35)
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
|
|
|
|
|
I have no idea why my ECIdentity object isn't reacheable.
Thanks for your help.
Best regards
PC
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18 years, 9 months
[EJB 3.0] - Re: Problem with deployment of ejb3 SLSB (5.0.0 beta2)
by ALRubinger
Your bean's implementation class does not explicitly designate any business interfaces; the container will not automatically scan for @Local and @Remote in the subclasses of the parent you've specified. I'd look there first (as it seems this is what you've intended).
Try:
@Stateless
| public class MaterializePreSelectionUseCase implements
| IMaterializePreSelectionUseCaseLocal, IMaterializePreSelectionUseCaseRemote
The confusing point here, and perhaps unrelated to your problem, is that the container should assume that your "IMaterializePreSelectionUseCase" is the Local interface itself. EJB3 Spec 4.6.6, Bullet Point 4.1:
anonymous wrote : If bean class implements a single interface, that interface is assumed to be the busi-
| ness interface of the bean. This business interface will be a local interface unless the
| interface is designated as a remote business interface by use of the Remote annota-
| tion on the bean class or interface or by means of the deployment descriptor.
Mind posting back here with the outcome of the proposed fix? I'd like to look into the second issue if that does the trick. JBoss AS / EJB3 Version?
S,
ALR
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18 years, 9 months
[EJB 3.0] - Use oracle to generate the id with the orcle seqence table
by penguine
I want to use the ejb3 entity model.
the PK should generated by the orcle sequence table not by hibernate.
So I configure me bean with:
@GeneratedValue(generator="select")
| @GenericGenerator(name="select", strategy="select",
| parameters =
| {
| @Parameter(name = "key", value = "idstoerung")
| })
|
The following error occurs:
| javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.HibernateException: Unable to resolve property: idstoerung
| at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:63)
| at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
| at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
| at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
| at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
| at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
| at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
| at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
| at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
| at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
| Caused by: javax.persistence.PersistenceException: org.hibernate.HibernateException: Unable to resolve property: idstoerung
| at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:629)
| at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:218)
| at org.jboss.ejb3.entity.TransactionScopedEntityManager.persist(TransactionScopedEntityManager.java:182)
| at de.dillinger.ww.stoerzeit.session.StoerzeitFacadeBean.aktiviereStoerungAn(StoerzeitFacadeBean.java:98)
| 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.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
| at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
| at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
| at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
| at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
| at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
| at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
| at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
| at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
| at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
| at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
| at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:163)
| at org.jboss.remoting.Client.invoke(Client.java:1550)
| at org.jboss.remoting.Client.invoke(Client.java:530)
| at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:62)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:103)
| at $Proxy5.aktiviereStoerungAn(Unknown Source)
| at de.dillinger.ww.stoerzeit.test.TestClient.aktiviereStoerungAn(TestClient.java:90)
| 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:71)
| 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)
| at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:74)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:103)
| at $Proxy5.aktiviereStoerungAn(Unknown Source)
| at de.dillinger.ww.stoerzeit.test.TestClient.aktiviereStoerungAn(TestClient.java:90)
| 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:71)
| at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
| at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
| at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
| at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
| at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
| at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
| at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
| at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
| at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
| at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
| Caused by: org.hibernate.HibernateException: Unable to resolve property: idstoerung
| at org.hibernate.tuple.entity.EntityMetamodel.getPropertyIndex(EntityMetamodel.java:439)
| at org.hibernate.tuple.entity.AbstractEntityTuplizer.getPropertyValue(AbstractEntityTuplizer.java:286)
| at org.hibernate.persister.entity.AbstractEntityPersister.getPropertyValue(AbstractEntityPersister.java:3586)
| at org.hibernate.id.SelectGenerator$SelectGeneratorDelegate.bindParameters(SelectGenerator.java:116)
| at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelectingDelegate.java:54)
| at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
| at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
| at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
| at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
| at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
| at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
| at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
| at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:131)
| at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:87)
| at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:38)
| at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:618)
| at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:592)
| at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:596)
| at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:212)
| at org.jboss.ejb3.entity.TransactionScopedEntityManager.persist(TransactionScopedEntityManager.java:182)
| at de.mycompany.StoerzeitFacadeBean.aktiviereStoerungAn(StoerzeitFacadeBean.java:98)
| 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.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
| at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
| at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
| at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
| at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
| at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
| at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
| at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
| at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
| at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
| at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
| at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
|
This happens when there is no property in the EntityMetamodel.
In ejb2.x we have our own class
@jboss.entity-command
| class = "de.mycompany.OracleCreateCommand"
| name = "oracle-sequence"
so we become the generated id with the RETURNING
Is such a configuration possible in EJB3?
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18 years, 9 months