コード例 #1
0
  public MsgEvent call(MsgEvent me) {
    try {

      String callId = java.util.UUID.randomUUID().toString();
      me.setParam(
          "callId-" + PluginEngine.region + "-" + PluginEngine.agent + "-" + PluginEngine.plugin,
          callId);
      PluginEngine.msgInQueue.offer(me);

      int count = 0;
      int timeout = 300;
      while (count < timeout) {
        if (PluginEngine.rpcMap.containsKey(callId)) {
          MsgEvent ce = null;

          synchronized (PluginEngine.rpcMap) {
            ce = PluginEngine.rpcMap.get(callId);
            PluginEngine.rpcMap.remove(callId);
          }

          return ce;
        }
        Thread.sleep(100);
        count++;
      }

      return null;
    } catch (Exception ex) {
      System.out.println("Controller : RPCCall : RPC failed " + ex.toString());
      return null;
    }
  }
  public List<MsgEvent> discover() {
    List<MsgEvent> discoveryList = null;
    // Find the server using UDP broadcast
    try {
      discoveryList = new ArrayList<MsgEvent>();
      // Open a random port to send the package
      c = new DatagramSocket();
      c.setBroadcast(true);

      byte[] sendData = "DISCOVER_FUIFSERVER_REQUEST".getBytes();

      // Try the 255.255.255.255 first
      try {
        DatagramPacket sendPacket =
            new DatagramPacket(
                sendData, sendData.length, InetAddress.getByName("255.255.255.255"), 32005);
        c.send(sendPacket);
        // System.out.println(getClass().getName() + ">>> Request packet sent to: 255.255.255.255
        // (DEFAULT)");
      } catch (Exception e) {
      }

      // Broadcast the message over all the network interfaces
      Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
      while (interfaces.hasMoreElements()) {
        NetworkInterface networkInterface = (NetworkInterface) interfaces.nextElement();

        if (networkInterface.isLoopback() || !networkInterface.isUp()) {
          continue; // Don't want to broadcast to the loopback interface
        }

        for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
          InetAddress broadcast = interfaceAddress.getBroadcast();
          if (broadcast == null) {
            continue;
          }

          // Send the broadcast package!
          try {
            DatagramPacket sendPacket =
                new DatagramPacket(sendData, sendData.length, broadcast, 32005);
            c.send(sendPacket);
          } catch (Exception e) {
          }

          // System.out.println(getClass().getName() + ">>> Request packet sent to: " +
          // broadcast.getHostAddress() + "; Interface: " + networkInterface.getDisplayName());
        }
      }

      // System.out.println(getClass().getName() + ">>> Done looping over all network interfaces.
      // Now waiting for a reply!");

      // Wait for a response
      while (!c.isClosed()) {
        try {
          byte[] recvBuf = new byte[15000];
          DatagramPacket receivePacket = new DatagramPacket(recvBuf, recvBuf.length);
          c.receive(receivePacket);

          // We have a response
          // System.out.println(getClass().getName() + ">>> Broadcast response from server: " +
          // receivePacket.getAddress().getHostAddress());

          // Check if the message is correct
          // System.out.println(new String(receivePacket.getData()));

          String json = new String(receivePacket.getData()).trim();
          // String response = "region=region0,agent=agent0,recaddr=" +
          // packet.getAddress().getHostAddress();
          try {
            MsgEvent me = gson.fromJson(json, MsgEvent.class);
            if (me != null) {
              if (!me.getParam("clientip").equals(receivePacket.getAddress().getHostAddress())) {
                // System.out.println("SAME HOST");
                // System.out.println(me.getParamsString() +
                // receivePacket.getAddress().getHostAddress());
                me.setParam("serverip", receivePacket.getAddress().getHostAddress());
                discoveryList.add(me);
              }
            }
          } catch (Exception ex) {
            System.out.println("in loop 0" + ex.toString());
          }
        } catch (SocketException ex) {
          // eat message.. this should happen
        } catch (Exception ex) {
          System.out.println("in loop 1" + ex.toString());
        }
      }
      // Close the port!
      // c.close();
      // System.out.println("CODY : Dicsicer Client Worker Engned!");
    } catch (Exception ex) {
      System.out.println("while not closed: " + ex.toString());
    }
    return discoveryList;
  }