Caused by: java.lang.RuntimeException: Could not find an implementation class.

    at javax.websocket.ContainerProvider.getWebSocketContainer(ContainerProvider.java:73) jboss-websocket-api_1.0_spec-1.0.0.Beta1.jar:1.0.0.Beta1

    at server.SenderBean.start(SenderBean.java:27) ContainerProvider.getWebSocketContainer() throws Could not find an implementation class

    at server.SenderBean.sendMessage(SenderBean.java:41) ContainerProvider.getWebSocketContainer() throws Could not find an implementation class

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ContainerProvider.getWebSocketContainer() throws Could not find an implementation class

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ContainerProvider.getWebSocketContainer() throws Could not find an implementation class

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ContainerProvider.getWebSocketContainer() throws Could not find an implementation class

    at java.lang.reflect.Method.invoke(Method.java:601) ContainerProvider.getWebSocketContainer() throws Could not find an implementation class

    at org.jboss.as.ee.component.ManagedReferenceMethodInterceptorFactory$ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptorFactory.java:72)

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)

    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:406)

    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:130) wildfly-weld-8.0.0.Alpha3.jar:8.0.0.Alpha3

    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:138) wildfly-weld-8.0.0.Alpha3.jar:8.0.0.Alpha3

    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)

    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) wildfly-ejb3-8.0.0.Alpha3.jar:8.0.0.Alpha3

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:406)

    at org.jboss.as.ejb3.concurrency.ContainerManagedConcurrencyInterceptor.processInvocation(ContainerManagedConcurrencyInterceptor.java:104) wildfly-ejb3-8.0.0.Alpha3.jar:8.0.0.Alpha3

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:406)

    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:46) weld-core-impl-2.0.2.Final.jar:2013-06-27 10:15

    at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:84) wildfly-weld-8.0.0.Alpha3.jar:8.0.0.Alpha3

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)

    at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53)

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.as.ejb3.component.singleton.SingletonComponentInstanceAssociationInterceptor.processInvocation(SingletonComponentInstanceAssociationInterceptor.java:52) wildfly-ejb3-8.0.0.Alpha3.jar:8.0.0.Alpha3

    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

    at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:273) wildfly-ejb3-8.0.0.Alpha3.jar:8.0.0.Alpha3

    ... 106 more