private synchronized void keepAlive() {
try {
// Send a keep alive, if there is a connection.
if (mStarted == true && mConnection != null) {
mConnection.sendKeepAlive();
}
} catch (MqttException e) {
log("MqttException: " + (e.getMessage() != null ? e.getMessage() : "NULL"), e);
mConnection.disconnect();
mConnection = null;
cancelReconnect();
}
}
@Override
public void onReceive(Context context, Intent intent) {
// Get network info
NetworkInfo info =
(NetworkInfo) intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
// Is there connectivity?
boolean hasConnectivity = (info != null && info.isConnected()) ? true : false;
log("Connectivity changed: connected=" + hasConnectivity);
if (hasConnectivity) {
reconnectIfNecessary();
} else if (mConnection != null) {
// if there no connectivity, make sure MQTT connection is
// destroyed
mConnection.disconnect();
cancelReconnect();
mConnection = null;
}
}
private synchronized void stop() {
// Do nothing, if the service is not running.
if (mStarted == false) {
Log.w(TAG, "Attempt to stop connection not active.");
return;
}
// Save stopped state in the preferences
setStarted(false);
// Remove the connectivity receiver
unregisterReceiver(mConnectivityChanged);
// Any existing reconnect timers should be removed, since we explicitly
// stopping the service.
cancelReconnect();
// Destroy the MQTT connection if there is one
if (mConnection != null) {
mConnection.disconnect();
mConnection = null;
}
}
@Override
public boolean subscribe(String rx, int grp, IMessage msg) {
return connection.subscribe(addDispatcher(rx, grp, msg));
}
@Override
public boolean subscribe(IMessage msg) {
return connection.subscribe(addDispatcher(msg));
}
