public void handleMessage(Message msg, int flags) {
   try {
     lock.lock();
     if (activated == false) return; // return true;
     if (msg.getMsgType() == Behavior.MSG_TYPE_COMMAND) {
       Behavior.CommandMessage cmdMsg = (Behavior.CommandMessage) msg;
       String command = cmdMsg.getCmd();
       // Remove the executor, because anything we do will
       // end the current execution.
       Engine.getExecutor().remove(this);
       if (Log.loggingDebug)
         Log.debug(
             "BaseBehavior.onMessage: command = "
                 + command
                 + "; oid = "
                 + obj.getOid()
                 + "; name "
                 + obj.getName());
       if (command.equals(MSG_CMD_TYPE_GOTO)) {
         GotoCommandMessage gotoMsg = (GotoCommandMessage) msg;
         Point destination = gotoMsg.getDestination();
         mode = MSG_CMD_TYPE_GOTO;
         roamingBehavior = true;
         gotoSetup(destination, gotoMsg.getSpeed());
       } else if (command.equals(MSG_CMD_TYPE_STOP)) {
         followTarget = null;
         pathState.clear();
         obj.getWorldNode().setDir(new MVVector(0, 0, 0));
         obj.updateWorldNode();
         mode = MSG_CMD_TYPE_STOP;
         // If roamingBehavior is set, that means that we
         // used formerly had a roaming behavior, so send
         // an ArrivedEventMessage so that the other
         // behavior starts up again.
         if (roamingBehavior) {
           try {
             Engine.getAgent().sendBroadcast(new ArrivedEventMessage(obj));
           } catch (Exception e) {
             Log.error(
                 "BaseBehavior.onMessage: Error sending ArrivedEventMessage, error was '"
                     + e.getMessage()
                     + "'");
             throw new RuntimeException(e);
           }
         }
       } else if (command.equals(BaseBehavior.MSG_CMD_TYPE_FOLLOW)) {
         FollowCommandMessage followMsg = (FollowCommandMessage) msg;
         mode = MSG_CMD_TYPE_FOLLOW;
         followSetup(followMsg.getTarget(), followMsg.getSpeed());
       }
     } else if (msg.getMsgType() == WorldManagerClient.MSG_TYPE_MOB_PATH_CORRECTION) {
       Engine.getExecutor().remove(this);
       interpolatePath();
       interpolatingPath = false;
     }
     // return true;
   } finally {
     lock.unlock();
   }
 }
  /**
   * True if the trigger should run for the message. Compares the {@code message} type to the
   * triggering types. If no triggering types are set (the default) then returns true if {@code
   * message} is a PerceptionMessage.
   */
  public boolean match(Message message) {
    if (msgTypes == null) {
      return (message instanceof PerceptionMessage);
    }

    return msgTypes.contains(message.getMsgType());
  }