Java 类java.rmi.server.ObjID 实例源码

public Registry getObject ( final String command ) throws Exception {

        String host;
        int port;
        int sep = command.indexOf(':');
        if ( sep < 0 ) {
            port = new Random().nextInt(65535);
            host = command;
        }
        else {
            host = command.substring(0, sep);
            port = Integer.valueOf(command.substring(sep + 1));
        }
        ObjID id = new ObjID(new Random().nextInt()); // RMI registry
        TCPEndpoint te = new TCPEndpoint(host, port);
        UnicastRef ref = new UnicastRef(new LiveRef(id, te, false));
        RemoteObjectInvocationHandler obj = new RemoteObjectInvocationHandler(ref);
        Registry proxy = (Registry) Proxy.newProxyInstance(JRMPClient.class.getClassLoader(), new Class[] {
            Registry.class
        }, obj);
        return proxy;
    }

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public Registry getObject ( String connection ) throws Exception {

        String host;
        int port;
        int sep = connection.indexOf(':');
        if ( sep < 0 ) {
            port = new Random().nextInt(65535);
            host = connection;
        }
        else {
            host = connection.substring(0, sep);
            port = Integer.valueOf(connection.substring(sep + 1));
        }
        ObjID id = new ObjID(new Random().nextInt()); // RMI registry
        TCPEndpoint te = new TCPEndpoint(host, port);
        UnicastRef ref = new UnicastRef(new LiveRef(id, te, false));
        RemoteObjectInvocationHandler obj = new RemoteObjectInvocationHandler(ref);
        Registry proxy = (Registry) Proxy.newProxyInstance(JRMPClient.class.getClassLoader(), new Class[] {
            Registry.class
        }, obj);
        return proxy;
    }

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public Registry getObject ( final String command ) throws Exception {

        String host;
        int port;
        int sep = command.indexOf(':');
        if ( sep < 0 ) {
            port = new Random().nextInt(65535);
            host = command;
        }
        else {
            host = command.substring(0, sep);
            port = Integer.valueOf(command.substring(sep + 1));
        }
        ObjID id = new ObjID(new Random().nextInt()); // RMI registry
        TCPEndpoint te = new TCPEndpoint(host, port);
        UnicastRef ref = new UnicastRef(new LiveRef(id, te, false));
        RemoteObjectInvocationHandler obj = new RemoteObjectInvocationHandler(ref);
        Registry proxy = (Registry) Proxy.newProxyInstance(JRMPClient.class.getClassLoader(), new Class[] {
            Registry.class
        }, obj);
        return proxy;
    }

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public void readExternal(ObjectInput in) throws IOException,
    ClassNotFoundException
{
  manager = UnicastConnectionManager.read(in);
  objid = ObjID.read(in);
  byte ack = in.readByte();
  // This byte is somewhat confusing when interoperating with JDK
  if (ack != RETURN_ACK && ack != 0/* jdk ack value */)
    {
      throw new IOException("no ack found");
    }

  // Notify the DGC of the remote side that we hold the reference to the
  // received object. Do not notify if the client and server are on the
  // same virtual machine.
  if (manager.serverobj == null)
    LeaseRenewingTask.scheduleLeases(this);
}

public void readExternal(ObjectInput in) throws IOException,
    ClassNotFoundException
{
  manager = UnicastConnectionManager.read(in);
  objid = ObjID.read(in);
  byte ack = in.readByte();
  // This byte is somewhat confusing when interoperating with JDK
  if (ack != RETURN_ACK && ack != 0/* jdk ack value */)
    {
      throw new IOException("no ack found");
    }

  // Notify the DGC of the remote side that we hold the reference to the
  // received object. Do not notify if the client and server are on the
  // same virtual machine.
  if (manager.serverobj == null)
    LeaseRenewingTask.scheduleLeases(this);
}

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

public Registry getObject ( final String command ) throws Exception {

        String host;
        int port;
        int sep = command.indexOf(':');
        if ( sep < 0 ) {
            port = new Random().nextInt(65535);
            host = command;
        }
        else {
            host = command.substring(0, sep);
            port = Integer.valueOf(command.substring(sep + 1));
        }
        ObjID id = new ObjID(new Random().nextInt()); // RMI registry
        TCPEndpoint te = new TCPEndpoint(host, port);
        UnicastRef ref = new UnicastRef(new LiveRef(id, te, false));
        RemoteObjectInvocationHandler obj = new RemoteObjectInvocationHandler(ref);
        Registry proxy = (Registry) Proxy.newProxyInstance(JRMPClient.class.getClassLoader(), new Class[] {
            Registry.class
        }, obj);
        return proxy;
    }

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
 * Reads everything left except Endpoint info from the given stream and
 * detects if DGC ack is needed.
 *
 * @param in the stream to read data from
 *
 * @throws IOException if any I/O error occurred
 * @throws ClassNotFoundException if class could not be loaded by current
 *         class loader
 */
protected void readCommon(ObjectInput in)
        throws IOException, ClassNotFoundException {
    objId = ObjID.read(in);
    boolean needAck = in.readBoolean();

    if (in instanceof RMIObjectInputStream) {
        RMIObjectInputStream oin = (RMIObjectInputStream) in;

        if (oin.isRemoteCallStream()) {
            oin.needDGCAck(needAck);
        }
    }
    RMIObjectInfo info = ExportManager.getInfo(objId);

    if ((info == null) || !info.sref.remoteEquals(this)) {
        /*
         * This remote object created in another VM so
         * register it in ClientDGC.
         */
        ClientDGC.registerForRenew(this);
    }
}

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

RMIObjectInfo(RMIReference ref,
              ObjID id,
              UnicastServerRef sref,
              Remote stub) {
    this.ref = ref;
    this.id = id;
    this.sref = sref;
    this.stub = stub;
    acc = AccessController.getContext();
    ClassLoader objCl = ref.get().getClass().getClassLoader();
    ClassLoader threadCl = Thread.currentThread().getContextClassLoader();

    if (threadCl == null) {
        loader = objCl;
    } else if (objCl == null || RMIUtil.isParentLoader(threadCl, objCl)) {
        loader = threadCl;
    } else {
        loader = objCl;
    }
}

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

public void readExternal(ObjectInput in) throws IOException,
    ClassNotFoundException
{
  manager = UnicastConnectionManager.read(in);
  objid = ObjID.read(in);
  byte ack = in.readByte();
  // This byte is somewhat confusing when interoperating with JDK
  if (ack != RETURN_ACK && ack != 0/* jdk ack value */)
    {
      throw new IOException("no ack found");
    }

  // Notify the DGC of the remote side that we hold the reference to the
  // received object. Do not notify if the client and server are on the
  // same virtual machine.
  if (manager.serverobj == null)
    LeaseRenewingTask.scheduleLeases(this);
}

/**
     * Creates a NinjaRemoteRef which points to the object on the given hostname
     * and port with the given object ID. Used to manually bootstrap a
     * client-side reference to a remote object (that is, without going through
     * the registry).
     *
//   * @param host
     *            The hostname to contact to call on this remote object.
//   * @param port
     *            The port to contact to call on this remote object.
     * @param oid
     *            The ObjID corresponding to the remote object.
//   * @param comm_type
     *            One of NinjaExportData.RMI_COMM_TYPE_* values, specifying the
     *            communication semantics for the call.
     */
    public NinjaRemoteRef(
//                            String host,
//                          int port,
                          ObjID oid, String server){
//                          int comm_type) {
        // DEBUG(System.out.println("NinjaRemoteRef constructor called with:
        // "+host+":"+port+" objid "+oid));
        debug = new Debug();
        debug.print("NinjaRemoteRef constructor called with: "
//                + host + ":"
//              + port
                + " objid " + oid);
//      remotehost = host;
//      remoteport = port;
        objid = oid;
        this.server=server;
//      commtype = comm_type;
    }

/**
 * Construct a Target for a remote object "impl" with
 * a specific object id.
 *
 * If "permanent" is true, then the impl is pinned permanently
 * (the impl will not be collected via distributed and/or local
 * GC).  If "on" is false, than the impl is subject to
 * collection. Permanent objects do not keep a server from
 * exiting.
 */
public Target(Remote impl, Dispatcher disp, Remote stub, ObjID id,
              boolean permanent)
{
    this.weakImpl = new WeakRef(impl, ObjectTable.reapQueue);
    this.disp = disp;
    this.stub = stub;
    this.id = id;
    this.acc = AccessController.getContext();

    /*
     * Fix for 4149366: so that downloaded parameter types unmarshalled
     * for this impl will be compatible with types known only to the
     * impl class's class loader (when it's not identical to the
     * exporting thread's context class loader), mark the impl's class
     * loader as the loader to use as the context class loader in the
     * server's dispatch thread while a call to this impl is being
     * processed (unless this exporting thread's context class loader is
     * a child of the impl's class loader, such as when a registry is
     * exported by an application, in which case this thread's context
     * class loader is preferred).
     */
    ClassLoader threadContextLoader =
        Thread.currentThread().getContextClassLoader();
    ClassLoader serverLoader = impl.getClass().getClassLoader();
    if (checkLoaderAncestry(threadContextLoader, serverLoader)) {
        this.ccl = threadContextLoader;
    } else {
        this.ccl = serverLoader;
    }

    this.permanent = permanent;
    if (permanent) {
        pinImpl();
    }
}

/**
 * Process client VM signalling reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void referenced(ObjID id, long sequenceNum, VMID vmid) {
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null) {
            target.referenced(sequenceNum, vmid);
        }
    }
}

/**
 * Process client VM dropping reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void unreferenced(ObjID id, long sequenceNum, VMID vmid,
                         boolean strong)
{
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null)
            target.unreferenced(sequenceNum, vmid, strong);
    }
}

/**
 * The clean call removes the VMID from the set of clients
 * that hold references to the object associated with the LiveRef
 * ref.  The sequence number is used to detect late clean calls.  If the
 * argument "strong" is true, then the clean call is a result of a
 * failed "dirty" call, thus the sequence number for the VMID needs
 * to be remembered until the client goes away.
 */
public void clean(ObjID[] ids, long sequenceNum, VMID vmid, boolean strong)
{
    for (ObjID id : ids) {
        if (dgcLog.isLoggable(Log.VERBOSE)) {
            dgcLog.log(Log.VERBOSE, "id = " + id +
                ", vmid = " + vmid + ", strong = " + strong);
        }

        ObjectTable.unreferenced(id, sequenceNum, vmid, strong);
    }
}

public Void run() {
    ClassLoader savedCcl =
        Thread.currentThread().getContextClassLoader();
    try {
        Thread.currentThread().setContextClassLoader(
            ClassLoader.getSystemClassLoader());

        /*
         * Put remote collector object in table by hand to prevent
         * listen on port.  (UnicastServerRef.exportObject would
         * cause transport to listen.)
         */
        try {
            dgc = new DGCImpl();
            ObjID dgcID = new ObjID(ObjID.DGC_ID);
            LiveRef ref = new LiveRef(dgcID, 0);
            UnicastServerRef disp = new UnicastServerRef(ref);
            Remote stub =
                Util.createProxy(DGCImpl.class,
                                 new UnicastRef(ref), true);
            disp.setSkeleton(dgc);
            Target target =
                new Target(dgc, disp, stub, dgcID, true);
            ObjectTable.putTarget(target);
        } catch (RemoteException e) {
            throw new Error(
                "exception initializing server-side DGC", e);
        }
    } finally {
        Thread.currentThread().setContextClassLoader(savedCcl);
    }
    return null;
}

/**
 * Create an array of ObjIDs (needed for the DGC remote calls)
 * from the ids in the given set of refs.
 */
private static ObjID[] createObjIDArray(Set<RefEntry> refEntries) {
    ObjID[] ids = new ObjID[refEntries.size()];
    Iterator<RefEntry> iter = refEntries.iterator();
    for (int i = 0; i < ids.length; i++) {
        ids[i] = iter.next().getRef().getObjID();
    }
    return ids;
}

/**
 * Construct a new live reference for a server object in the local
 * address space, to use sockets of the specified type.
 */
public LiveRef(int port,
               RMIClientSocketFactory csf,
               RMIServerSocketFactory ssf)
{
    this((new ObjID()), port, csf, ssf);
}

public static LiveRef read(ObjectInput in, boolean useNewFormat)
    throws IOException, ClassNotFoundException
{
    Endpoint ep;
    ObjID id;

    // Now read in the endpoint, id, and result flag
    // (need to choose whether or not to read old JDK1.1 endpoint format)
    if (useNewFormat) {
        ep = TCPEndpoint.read(in);
    } else {
        ep = TCPEndpoint.readHostPortFormat(in);
    }
    id = ObjID.read(in);
    boolean isResultStream = in.readBoolean();

    LiveRef ref = new LiveRef(id, ep, false);

    if (in instanceof ConnectionInputStream) {
        ConnectionInputStream stream = (ConnectionInputStream)in;
        // save ref to send "dirty" call after all args/returns
        // have been unmarshaled.
        stream.saveRef(ref);
        if (isResultStream) {
            // set flag in stream indicating that remote objects were
            // unmarshaled.  A DGC ack should be sent by the transport.
            stream.setAckNeeded();
        }
    } else {
        DGCClient.registerRefs(ep, Arrays.asList(new LiveRef[] { ref }));
    }

    return ref;
}

/**
 * Construct a new Activator on a specified port.
 */
ActivatorImpl(int port, RMIServerSocketFactory ssf)
    throws RemoteException
{
    /* Server ref must be created and assigned before remote object
     * 'this' can be exported.
     */
    LiveRef lref =
        new LiveRef(new ObjID(ObjID.ACTIVATOR_ID), port, null, ssf);
    UnicastServerRef uref = new UnicastServerRef(lref);
    ref = uref;
    uref.exportObject(this, null, false);
}

ActivationSystemImpl(int port, RMIServerSocketFactory ssf)
    throws RemoteException
{
    /* Server ref must be created and assigned before remote object
     * 'this' can be exported.
     */
    LiveRef lref = new LiveRef(new ObjID(4), port, null, ssf);
    UnicastServerRef uref = new UnicastServerRef(lref);
    ref = uref;
    uref.exportObject(this, null);
}