public SSEHandler( final MessageCallback messageCallback, final ClientMessageBusImpl clientMessageBus) { this.clientMessageBus = clientMessageBus; this.messageCallback = messageCallback; this.pollingHandler = HttpPollingHandler.newNoPollingInstance(messageCallback, clientMessageBus); sseAgentSubscription = clientMessageBus.subscribe( SSE_AGENT_SERVICE, new MessageCallback() { @Override public void callback(final Message message) { notifyConnected(); } }); }