Hi,

I am having problem using EntityHome. I have an entity class Foo, follow the Seam documentation in Section 10.2 I define a FooHome class


| public FooHome extends EntityHome<Foo> {
| }
|

First I get null pointer exception because getEntityManager() returns null. I solve this problem by injecting an entity manager. Now when I call persist() I get the following exception:

| java.lang.NullPointerException
|  at com.ericsson.ems.FooHome.persist(FooHome.java:32)
|  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.seam.util.Reflections.invoke(Reflections.java:20)
|  at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
|  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
|  at org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:47)
|  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
|  at org.jboss.seam.interceptors.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:37)
|  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
|  at org.jboss.seam.interceptors.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:34)
|  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
|  at org.jboss.seam.interceptors.TransactionInterceptor$1.work(TransactionInterceptor.java:32)
|  at org.jboss.seam.util.Work.workInTransaction(Work.java:37)
|  at org.jboss.seam.interceptors.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:27)
|  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
|  at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
|  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
|  at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
|  at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:151)
|  at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:87)
|  at com.ericsson.ems.Eda1500Home_$$_javassist_115.persist(Eda1500Home_$$_javassist_115.java)
|  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 com.sun.el.parser.AstValue.invoke (AstValue.java:174)
|  at com.sun.el.MethodExpressionImpl.invoke (MethodExpressionImpl.java:286)
|  at com.sun.facelets.el.TagMethodExpression.invoke (TagMethodExpression.java:68)
|  at com.sun.facelets.el.LegacyMethodBinding.invoke (LegacyMethodBinding.java:69)
|  at org.apache.myfaces.application.ActionListenerImpl.processAction (ActionListenerImpl.java:63)
|  at javax.faces.component.UICommand.broadcast (UICommand.java:106)
|  at org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
|  at org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
|  at org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:329)
|  at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication (LifecycleImpl.java:343)
|  at org.apache.myfaces.lifecycle.LifecycleImpl.execute (LifecycleImpl.java:86)
|  at javax.faces.webapp.FacesServlet.service (FacesServlet.java:137)
|  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:252)
|  at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:173)
|  at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
|  at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60)
|  at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|  at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
|  at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|  at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
|  at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|  at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79)
|  at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|  at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
|  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:202)
|  at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:173)
|  at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:96)
|  at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:220)
|  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:202)
|  at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:173)
|  at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter (ReplyHeaderFilter.java:96)
|  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:202)
|  at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:173)
|  at org.apache.catalina.core.StandardWrapperValve.invoke (StandardWrapperValve.java:213)
|  at org.apache.catalina.core.StandardContextValve.invoke (StandardContextValve.java:178)
|  at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke (SecurityAssociationValve.java:175)
|  at org.jboss.web.tomcat.security.JaccContextValve.invoke (JaccContextValve.java:74)
|  at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:126)
|  at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:105)
|  at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
|  at org.apache.catalina.core.StandardEngineValve.invoke (StandardEngineValve.java:107)
|  at org.apache.catalina.connector.CoyoteAdapter.service (CoyoteAdapter.java:148)
|  at org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:869)
|  at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
|  at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket (PoolTcpEndpoint.java:527)
|  at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run (MasterSlaveWorkerThread.java:112)
|  at java.lang.Thread.run (Thread.java:595)
|
For debugging purpose, I redefined persist method in FooHome and cut and paste the code from EntityHome.persist. The null pointer exception is caused by PersistenceProvide.instance() returns null. Am I missing something? I thought when I use EntityHome I don't need to anything in the XML configuration file.

Thanks in advance.

Qing

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