FIX: MqttReceiver auto reconnect

src/main/java/de/ph87/data/message/receive/mqtt/MqttReceiver.java

@@ -81,11 +81,16 @@ public class MqttReceiver {
     try {
       log.info("Connecting mqtt broker: {} as \"{}\"{}", uri, clientId, cleanSession ? " [CLEAN SESSION]" : "");
       client = new MqttClient(uri, clientId, persistence);
+      client.setCallback(new MyMqttCallback());
+
       final MqttConnectOptions options = new MqttConnectOptions();
       options.setAutomaticReconnect(true);
       options.setCleanSession(cleanSession);
       options.setConnectionTimeout(config.getConnectTimeoutSec());
+      options.setKeepAliveInterval(config.getConnectKeepAliveSec());
+      assert client != null;
       client.connect(options);
+
       log.info("MQTT broker connected.");
       client.subscribe(config.getTopic(), this::_receive);
     } catch (MqttException e) {
@@ -116,4 +121,26 @@ public class MqttReceiver {
     messageService.handle(message);
   }
 
+  private class MyMqttCallback implements MqttCallback {
+
+    @Override
+    public void connectionLost(final Throwable throwable) {
+      synchronized (thread) {
+        log.warn("MQTT broker disconnected.");
+        thread.notifyAll();
+      }
+    }
+
+    @Override
+    public void messageArrived(final String s, final MqttMessage mqttMessage) {
+
+    }
+
+    @Override
+    public void deliveryComplete(final IMqttDeliveryToken iMqttDeliveryToken) {
+
+    }
+
+  }
+
 }