NPE when calling getCallerPrincipal on SessionContext
I wrote the following interceptor :
public class SecurityInterceptor
{
@javax.annotation.Resource
protected javax.ejb.SessionContext context;
@javax.interceptor.AroundInvoke
public Object execute(javax.interceptor.InvocationContext ctx)
throws Exception
{
try
{
if (context != null) {
if (context.getCallerPrincipal() != null) {
System.out.println(context.getCallerPrincipal().getName());
}
else {
System.out.println("principal = null");
}
}
return ctx.proceed();
}
catch (Exception e)
{
e.printStackTrace();
throw e;
}
}
}When running this interceptor, I have a NullPointerException when calling getCallerPrincipal method on SessionContext :
java.lang.NullPointerException at org.jboss.ejb3.EJBContextImpl.getCallerPrincipal(EJBContextImpl.java:164) at t4.core.employee.SecurityInterceptor.execute(SecurityInterceptor.java:29) 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.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118) 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:193) 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:64) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:166) 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.localInvoke(StatelessContainer.java:249) at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:214) at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:86) at $Proxy153.loadAllMyEmployees(Unknown Source) at t4.core.employee.internal.test.EmployeeInternalServiceTest.testEmployee(EmployeeInternalServiceTest.java:54) 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.testng.internal.MethodHelper.invokeMethod(MethodHelper.java:580) at org.testng.internal.Invoker.invokeMethod(Invoker.java:478) at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:607) at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:874) at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109) at org.testng.TestRunner.runWorkers(TestRunner.java:689) at org.testng.TestRunner.privateRun(TestRunner.java:566) at org.testng.TestRunner.run(TestRunner.java:466) at org.testng.SuiteRunner.runTest(SuiteRunner.java:301) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:296) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:276) at org.testng.SuiteRunner.run(SuiteRunner.java:191) at org.testng.TestNG.createAndRunSuiteRunners(TestNG.java:808) at org.testng.TestNG.runSuitesLocally(TestNG.java:776) at org.testng.TestNG.run(TestNG.java:701) at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:77) at org.apache.maven.surefire.testng.TestNGXmlTestSuite.execute(TestNGXmlTestSuite.java:92) at org.apache.maven.surefire.Surefire.run(Surefire.java:177) 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.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:334) at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:980)
I can retrieve the principal with org.jboss.security.SecurityAssociation.getPrincipal(), but this is a JBoss specific feature.
What really upsets me is that I had the same error with EJB 3.0 embeddable container, and that's why I try to migrate to JBoss Embedded beta3 for a few days ! People reported this problem for EJB 3.0 embeddable container a few months ago, but they were said that it was no longer supported : http://jira.jboss.com/jira/browse/EJBTHREE-615