/**
  * Deregistra un player dal server, rendendo nuovamente disponibile il nickname ad altri player.
  *
  * @param nickname nome del player da deregistrare
  */
 public void deregisterPlayer(String nickname) {
   try {
     server.deregister(nickname);
   } catch (RemoteException e) {
     System.out.println("Impossible to logout." + e.getMessage());
   }
 }
  /**
   * Create a MonitoredHostProvider instance using the given HostIdentifier.
   *
   * @param hostId the host identifier for this MonitoredHost
   * @throws MonitorException Thrown on any error encountered while communicating with the remote
   *     host.
   */
  public MonitoredHostProvider(HostIdentifier hostId) throws MonitorException {
    this.hostId = hostId;
    this.listeners = new ArrayList();
    this.interval = DEFAULT_POLLING_INTERVAL;
    this.activeVms = new HashSet();

    String rmiName;
    String sn = serverName;
    String path = hostId.getPath();

    if ((path != null) && (path.length() > 0)) {
      sn = path;
    }

    if (hostId.getPort() != -1) {
      rmiName = "rmi://" + hostId.getHost() + ":" + hostId.getPort() + sn;
    } else {
      rmiName = "rmi://" + hostId.getHost() + sn;
    }

    try {
      remoteHost = (RemoteHost) Naming.lookup(rmiName);

    } catch (RemoteException e) {
      /*
       * rmi registry not available
       *
       * Access control exceptions, where the rmi server refuses a
       * connection based on policy file configuration, come through
       * here on the client side. Unfortunately, the RemoteException
       * doesn't contain enough information to determine the true cause
       * of the exception. So, we have to output a rather generic message.
       */
      String message = "RMI Registry not available at " + hostId.getHost();

      if (hostId.getPort() == -1) {
        message = message + ":" + java.rmi.registry.Registry.REGISTRY_PORT;
      } else {
        message = message + ":" + hostId.getPort();
      }

      if (e.getMessage() != null) {
        throw new MonitorException(message + "\n" + e.getMessage(), e);
      } else {
        throw new MonitorException(message, e);
      }

    } catch (NotBoundException e) {
      // no server with given name
      String message = e.getMessage();
      if (message == null) message = rmiName;
      throw new MonitorException("RMI Server " + message + " not available", e);
    } catch (MalformedURLException e) {
      // this is a programming problem
      e.printStackTrace();
      throw new IllegalArgumentException("Malformed URL: " + rmiName);
    }
    this.vmManager = new RemoteVmManager(remoteHost);
    this.timer = new Timer(true);
  }
Example #3
0
 /**
  * ***************************************************************
  *
  * @param ip
  * @param port
  * @return
  */
 public ChordMessageInterface rmiChord(String ip, int port) {
   ChordMessageInterface chord = null;
   try {
     Registry registry = LocateRegistry.getRegistry(ip, port);
     chord = (ChordMessageInterface) (registry.lookup("Chord"));
     return chord;
   } catch (RemoteException e) {
     e.printStackTrace();
   } catch (NotBoundException e) {
     e.printStackTrace();
   }
   return null;
 }
  public static void main(String[] args) {
    String host = args[0];
    int port = Integer.parseInt(args[1]);

    if (System.getSecurityManager() == null) {
      System.setSecurityManager(new RMISecurityManager());
    }

    String name = "//" + host + ":" + port + "/EquationSolver";

    double[][] A = {
      {4.0, 3.0, 1.0},
      {2.0, -6.0, 4.0},
      {7.0, 5.0, 3.0}
    };
    double[] b = {17.0, 8.0, 32.0};

    try {
      EquationSolver solver = (EquationSolver) Naming.lookup(name);
      double[] x = solver.solve(A, b);

      StringBuffer sb = new StringBuffer();
      for (int i = 0; i < x.length; i++) {
        sb.append(x[i]);
        sb.append(' ');
      }
      System.out.println(sb);

    } catch (RemoteException ex) {
      ex.printStackTrace(System.err);

    } catch (NotBoundException ex) {
      ex.printStackTrace(System.err);

    } catch (MalformedURLException ex) {
      ex.printStackTrace(System.err);
    }
  }
Example #5
0
  /**
   * @param argv The parameters passed to this program.
   * @exception Exception if the filesystem does not exist.
   * @return 0 on success, non zero on error.
   */
  private int processArgs(String[] argv) throws Exception {

    if (argv.length < 1) {
      printUsage("");
      return -1;
    }

    int exitCode = -1;
    int i = 0;
    String cmd = argv[i++];

    //
    // verify that we have enough command line parameters
    //
    if ("-geteditsize".equals(cmd)) {
      if (argv.length != 1) {
        printUsage(cmd);
        return exitCode;
      }
    } else if ("-checkpoint".equals(cmd)) {
      if (argv.length != 1 && argv.length != 2) {
        printUsage(cmd);
        return exitCode;
      }
      if (argv.length == 2 && !"force".equals(argv[i])) {
        printUsage(cmd);
        return exitCode;
      }
    }

    exitCode = 0;
    try {
      if ("-checkpoint".equals(cmd)) {
        long size = namenode.getEditLogSize();
        if (size >= checkpointSize || argv.length == 2 && "force".equals(argv[i])) {
          doCheckpoint();
        } else {
          System.err.println(
              "EditLog size "
                  + size
                  + " bytes is "
                  + "smaller than configured checkpoint "
                  + "size "
                  + checkpointSize
                  + " bytes.");
          System.err.println("Skipping checkpoint.");
        }
      } else if ("-geteditsize".equals(cmd)) {
        long size = namenode.getEditLogSize();
        System.out.println("EditLog size is " + size + " bytes");
      } else {
        exitCode = -1;
        LOG.error(cmd.substring(1) + ": Unknown command");
        printUsage("");
      }
    } catch (RemoteException e) {
      //
      // This is a error returned by hadoop server. Print
      // out the first line of the error mesage, ignore the stack trace.
      exitCode = -1;
      try {
        String[] content;
        content = e.getLocalizedMessage().split("\n");
        LOG.error(cmd.substring(1) + ": " + content[0]);
      } catch (Exception ex) {
        LOG.error(cmd.substring(1) + ": " + ex.getLocalizedMessage());
      }
    } catch (IOException e) {
      //
      // IO exception encountered locally.
      //
      exitCode = -1;
      LOG.error(cmd.substring(1) + ": " + e.getLocalizedMessage());
    } finally {
      // Does the RPC connection need to be closed?
    }
    return exitCode;
  }