Hi, It is a bug in Wicket Native WebSocket. https://github.com/apache/wicket/blob/d9d142b0738e289e639165523c4190727e281519/wicket-native-websocket/wicket-native-websocket-core/src/main/java/org/apache/wicket/protocol/ws/api/AbstractWebSocketProcessor.java#L310 returns a null and still we try to push the message.
Please file a ticket in JIRA! Thanks! What is the idea of your implementation? To notify the other users of the app that some user have left? Like in a chat app? Martin Grigorov Wicket Training and Consulting https://twitter.com/mtgrigorov On Wed, Nov 2, 2016 at 5:01 PM, Peter Henderson <peter.hender...@starjar.com > wrote: > Hi all. > > wicket 7.3 > tomcat 8.5.5 > > > I'm starting to see many more exceptions in relation to web sockets. > > [1] > > I have a HttpSessionListener, which sends a message to an actor when a > session is destroyed (aka user logout). The actor eventually broadcasts a > web socket message. > > Am I doing something wrong in my code [2]? > > > > > [1] > > oawpwa.AbstractWebSocketProcessor An error occurred during processing of a > WebSocket message > java.lang.IllegalArgumentException: Argument 'component' may not be null. > at org.apache.wicket.util.lang.Args.notNull(Args.java:41) > at > org.apache.wicket.protocol.ws.api.WebSocketRequestHandler.< > init>(WebSocketRequestHandler.java:59) > at > org.apache.wicket.protocol.ws.WebSocketSettings. > newWebSocketRequestHandler(WebSocketSettings.java:220) > at > org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor. > broadcastMessage(AbstractWebSocketProcessor.java:245) > at > org.apache.wicket.protocol.ws.api.AbstractWebSocketConnection.sendMessage( > AbstractWebSocketConnection.java:43) > at > org.apache.wicket.protocol.ws.api.WebSocketPushBroadcaster$1.run( > WebSocketPushBroadcaster.java:124) > at > org.apache.wicket.protocol.ws.WebSocketSettings$SameThreadExecutor.run( > WebSocketSettings.java:246) > at > org.apache.wicket.protocol.ws.api.WebSocketPushBroadcaster.process( > WebSocketPushBroadcaster.java:119) > at > org.apache.wicket.protocol.ws.api.WebSocketPushBroadcaster.broadcastAll( > WebSocketPushBroadcaster.java:109) > at > com.starjar.engine.LoggedInUserTrackerActor.broadcastStats( > LoggedInUserTrackerActor.scala:69) > at > com.starjar.engine.LoggedInUserTrackerActor$$ > anonfun$receive$1.applyOrElse(LoggedInUserTrackerActor.scala:125) > at akka.actor.Actor$class.aroundReceive(Actor.scala:467) > at > com.starjar.engine.LoggedInUserTrackerActor.aroundReceive( > LoggedInUserTrackerActor.scala:31) > at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516) > at akka.actor.ActorCell.invoke(ActorCell.scala:487) > at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238) > at akka.dispatch.Mailbox.run(Mailbox.scala:220) > at > akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec( > AbstractDispatcher.scala:397) > at > scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) > at > scala.concurrent.forkjoin.ForkJoinPool$WorkQueue. > runTask(ForkJoinPool.java:1339) > at > scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) > at > scala.concurrent.forkjoin.ForkJoinWorkerThread.run( > ForkJoinWorkerThread.java:107) > > > > > > [2] The broadcasting code running in my actor. > > private def buildLoggedInUserMessage(): CurrentlyLoggedInUsers = { > val response = ... /* snip snip snip */ > response > } > > def broadcastStats(): Unit = { > val application = WicketStarjarApplication.get() > val webSocketSettings = WebSocketSettings.Holder.get(application) > val broadcaster = new > WebSocketPushBroadcaster(webSocketSettings.getConnectionRegistry()) > broadcaster.broadcastAll(application, buildLoggedInUserMessage) > } > > > > > > > Thanks > > Peter. > > > > > > > > > > > > > -- > Peter Henderson >
