Push notification with 7.1.9 - Push not enabled

Vaadin 6 / 7 / 8
1

Hi,

I have a UI class and embedded view through navigator. My view has a annotation @push and wrote a below code in view class
getUI().access(new Runnable() {
@Override
public void run() {
refreshData();
getUI().push();
}
});

This works fine. it pushes tha data and upate the UI but along with that it shows below exception on UI and server log.

java.util.concurrent.ExecutionException: java.lang.IllegalStateException: Push not enabled
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at com.vaadin.server.VaadinSession$FutureAccess.get(VaadinSession.java:121)
    at com.vaadin.server.VaadinService.runPendingAccessTasks(VaadinService.java:1761)
    at com.vaadin.server.VaadinSession.unlock(VaadinSession.java:949)
    at com.vaadin.server.VaadinService.ensureAccessQueuePurged(VaadinService.java:1722)
    at com.vaadin.server.VaadinService.accessSession(VaadinService.java:1688)
    at com.vaadin.server.VaadinSession.access(VaadinSession.java:1306)
    at com.vaadin.ui.UI.access(UI.java:1294)
   
    at sun.reflect.GeneratedMethodAccessor95.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:198)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161)
    at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:969)
    at com.vaadin.ui.Image.access$000(Image.java:35)
    at com.vaadin.ui.Image$1.click(Image.java:40)
    at sun.reflect.GeneratedMethodAccessor94.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:168)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118)
    at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:207)
    at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111)
    at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91)
    at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37)
    at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1382)
    at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.IllegalStateException: Push not enabled
    at com.vaadin.ui.UI.push(UI.java:1382)
   
    at com.vaadin.ui.UI.accessSynchronously(UI.java:1231)
    at com.vaadin.ui.UI$3.run(UI.java:1297)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at com.vaadin.server.VaadinService.runPendingAccessTasks(VaadinService.java:1758)
    ... 54 more

What’s wrong?

Regards,
Azhar

2

This same code works well in vaadin 7. 1. 2

Regards,
Azhar

3

Seems late but can help other people. You need to annotate your class with @Push. Default mode is AUTOMATIC.