llvm-gcc-4.0/libjava/gnu/java/rmi/server/UnicastRef.java - llvm-archive - Git at Google

 /*
   Copyright (c) 1996, 1997, 1998, 1999, 2002 Free Software Foundation, Inc.

 This file is part of GNU Classpath.

 GNU Classpath is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 GNU Classpath is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GNU Classpath; see the file COPYING.  If not, write to the
 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 02111-1307 USA.

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
 combination.

 As a special exception, the copyright holders of this library give you
 permission to link this library with independent modules to produce an
 executable, regardless of the license terms of these independent
 modules, and to copy and distribute the resulting executable under
 terms of your choice, provided that you also meet, for each linked
 independent module, the terms and conditions of the license of that
 module.  An independent module is a module which is not derived from
 or based on this library.  If you modify this library, you may extend
 this exception to your version of the library, but you are not
 obligated to do so.  If you do not wish to do so, delete this
 exception statement from your version. */

 package gnu.java.rmi.server;

 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.io.ObjectInput;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutput;
 import java.io.ObjectOutputStream;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.rmi.Remote;
 import java.rmi.RemoteException;
 import java.rmi.server.ObjID;
 import java.rmi.server.Operation;
 import java.rmi.server.RMIClientSocketFactory;
 import java.rmi.server.RemoteCall;
 import java.rmi.server.RemoteObject;
 import java.rmi.server.RemoteRef;
 import java.rmi.server.UID;

 public class UnicastRef
 	implements RemoteRef, ProtocolConstants {

 public ObjID objid;
 UnicastConnectionManager manager;

 /**
  * Used by serialization, and let subclass capable of having default constructor
  */
 // must be public otherwise java.rmi.RemoteObject cannot instantiate this class
 // -- iP
 public UnicastRef() {
 }

 public UnicastRef(ObjID objid, String host, int port, RMIClientSocketFactory csf) {
 	this(objid);
 	manager = UnicastConnectionManager.getInstance(host, port, csf);
 }

 public UnicastRef(ObjID objid) {
 	this.objid = objid;
 }

 public Object invoke(Remote obj, Method method, Object[] params, long opnum) throws Exception {
     // Check if client and server are in the same VM, then local call can be used to
     // replace remote call, but it's somewhat violating remote semantic.
     Object svrobj = manager.serverobj;

     // Make sure that the server object is compatible. It could be loaded from a different
     // classloader --iP
     if(svrobj != null && method.getDeclaringClass().isInstance(svrobj)){
         //local call
 		Object ret = null;
 		try{
 		    ret = method.invoke(svrobj, params);
 		}catch(InvocationTargetException e){
 		    throw (Exception)e.getTargetException();
 		}
 		//System.out.println("\n\n ***** local call: " + method + "\nreturn: " + ret + "\n\n");
 		return ret;
 	}
 	//System.out.println("***************** remote call:" + manager.serverPort);
 	return (invokeCommon(obj, method, params, -1, opnum));
 }

 private Object invokeCommon(Remote obj, Method method, Object[] params, int opnum, long hash) throws Exception {
 	UnicastConnection conn;
 	try {
 		conn = manager.getConnection();
 	}
 	catch (IOException e1) {
 		throw new RemoteException("connection failed to host: " + manager.serverName, e1);
 	}

 	ObjectOutputStream out;
 	DataOutputStream dout;
 	try {
 		dout = conn.getDataOutputStream();
 		dout.writeByte(MESSAGE_CALL);

 		out = conn.startObjectOutputStream(); // (re)start ObjectOutputStream

 		objid.write(out);
 		out.writeInt(opnum);
 		out.writeLong(hash);

 		// must handle primitive class and their wrapper classes
 		Class clss[] = method.getParameterTypes();
 	    for(int i = 0; i < clss.length; i++)
 	        ((RMIObjectOutputStream)out).writeValue(params[i], clss[i]);

 		out.flush();
 	}
 	catch (IOException e2) {
 		throw new RemoteException("call failed: ", e2);
 	}

 	int returncode;
 	Object returnval;
 	DataInputStream din;
 	ObjectInputStream in;
 	UID ack;
 	try {
 		din = conn.getDataInputStream();

 		if ((returncode = din.readUnsignedByte()) != MESSAGE_CALL_ACK) {
 		    conn.disconnect();
 			throw new RemoteException("Call not acked:" + returncode);
 		}

 		in = conn.startObjectInputStream(); // (re)start ObjectInputStream
 		returncode = in.readUnsignedByte();
 		ack = UID.read(in);

 		Class cls = method.getReturnType();

 	if (returncode == RETURN_NACK) {
 	    returnval = in.readObject();  // get Exception

         } else if(cls == Void.TYPE) {
             returnval = null;
             // in.readObject() // not required! returntype 'void' means no field is returned.
         } else {
             returnval = ((RMIObjectInputStream)in).readValue(cls); // get returnvalue
 	}
 	} catch (IOException e3) {
 	    //for debug: e3.printStackTrace();
 		throw new RemoteException("call return failed: ", e3);
 	}

     /* if DGCAck is necessary??
     //According to RMI wire protocol, send a DGCAck
     // to indicate receiving return value
     dout.writeByte(MESSAGE_DGCACK);
     ack.write(dout);
     out.flush();
     */

 	manager.discardConnection(conn);

 	if (returncode != RETURN_ACK && returnval != null) {
 		if (returncode == RETURN_NACK) throw (Exception)returnval;
 		else throw new RemoteException("unexpected returncode: " + returncode);
 	}

 	return (returnval);
 }

 /**
  * @deprecated
  */
 public RemoteCall newCall(RemoteObject obj, Operation[] op, int opnum, long hash) throws RemoteException {
     UnicastConnection conn;

 	try {
 		conn = manager.getConnection();
 	}
 	catch (IOException e1) {
 		throw new RemoteException("connection failed to host: " + manager.serverName, e1);
 	}

     //obj: useless?

 	return (new UnicastRemoteCall(conn, objid, opnum, hash));
 }

 /**
  * @deprecated
  */
 public void invoke(RemoteCall call) throws Exception {
 	UnicastRemoteCall c = (UnicastRemoteCall)call;
 	call.executeCall();
 }

 /**
  * @deprecated
  */
 public void done(RemoteCall call) throws RemoteException {
 	UnicastRemoteCall c = (UnicastRemoteCall)call;
 	try{
 	    c.done();
 	} catch(IOException e){}
     UnicastConnection conn = c.getConnection();
 	manager.discardConnection(conn);
 }

 public void writeExternal(ObjectOutput out) throws IOException {
 	if (manager == null) {
 		throw new IOException("no connection");
 	}
 	manager.write(out);
 	objid.write(out);
 	// This byte is somewhat confusing when interoperating with JDK
 	out.writeByte(0); //RETURN_ACK);
 }

 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");
 	}
 }

 public boolean remoteEquals(RemoteRef ref) {
 	throw new Error("Not implemented");
 }

 public int remoteHashCode() {
 	throw new Error("Not implemented");
 }

 public String getRefClass(ObjectOutput out) {
 	return ("UnicastRef");
 }

 public String remoteToString() {
 	throw new Error("Not implemented");
 }

 public void dump(UnicastConnection conn) {
 	try {
 		DataInputStream din = conn.getDataInputStream();
 		for (;;) {
 			int b = din.readUnsignedByte();
 			System.out.print(Integer.toHexString(b));
 			if (b >= 32 && b < 128) {
 				System.out.print(": " + (char)b);
 			}
 			System.out.println();
 		}
 	}
 	catch (IOException _) {
 	}
 }

 }
	/*
	Copyright (c) 1996, 1997, 1998, 1999, 2002 Free Software Foundation, Inc.

	This file is part of GNU Classpath.

	GNU Classpath is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2, or (at your option)
	any later version.

	GNU Classpath is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with GNU Classpath; see the file COPYING. If not, write to the
	Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	02111-1307 USA.

	Linking this library statically or dynamically with other modules is
	making a combined work based on this library. Thus, the terms and
	conditions of the GNU General Public License cover the whole
	combination.

	As a special exception, the copyright holders of this library give you
	permission to link this library with independent modules to produce an
	executable, regardless of the license terms of these independent
	modules, and to copy and distribute the resulting executable under
	terms of your choice, provided that you also meet, for each linked
	independent module, the terms and conditions of the license of that
	module. An independent module is a module which is not derived from
	or based on this library. If you modify this library, you may extend
	this exception to your version of the library, but you are not
	obligated to do so. If you do not wish to do so, delete this
	exception statement from your version. */

	package gnu.java.rmi.server;

	import java.io.DataInputStream;
	import java.io.DataOutputStream;
	import java.io.IOException;
	import java.io.ObjectInput;
	import java.io.ObjectInputStream;
	import java.io.ObjectOutput;
	import java.io.ObjectOutputStream;
	import java.lang.reflect.InvocationTargetException;
	import java.lang.reflect.Method;
	import java.rmi.Remote;
	import java.rmi.RemoteException;
	import java.rmi.server.ObjID;
	import java.rmi.server.Operation;
	import java.rmi.server.RMIClientSocketFactory;
	import java.rmi.server.RemoteCall;
	import java.rmi.server.RemoteObject;
	import java.rmi.server.RemoteRef;
	import java.rmi.server.UID;

	public class UnicastRef
	implements RemoteRef, ProtocolConstants {

	public ObjID objid;
	UnicastConnectionManager manager;

	/**
	* Used by serialization, and let subclass capable of having default constructor
	*/
	// must be public otherwise java.rmi.RemoteObject cannot instantiate this class
	// -- iP
	public UnicastRef() {
	}

	public UnicastRef(ObjID objid, String host, int port, RMIClientSocketFactory csf) {
	this(objid);
	manager = UnicastConnectionManager.getInstance(host, port, csf);
	}

	public UnicastRef(ObjID objid) {
	this.objid = objid;
	}

	public Object invoke(Remote obj, Method method, Object[] params, long opnum) throws Exception {
	// Check if client and server are in the same VM, then local call can be used to
	// replace remote call, but it's somewhat violating remote semantic.
	Object svrobj = manager.serverobj;

	// Make sure that the server object is compatible. It could be loaded from a different
	// classloader --iP
	if(svrobj != null && method.getDeclaringClass().isInstance(svrobj)){
	//local call
	Object ret = null;
	try{
	ret = method.invoke(svrobj, params);
	}catch(InvocationTargetException e){
	throw (Exception)e.getTargetException();
	}
	//System.out.println("\n\n ***** local call: " + method + "\nreturn: " + ret + "\n\n");
	return ret;
	}
	//System.out.println("***************** remote call:" + manager.serverPort);
	return (invokeCommon(obj, method, params, -1, opnum));
	}

	private Object invokeCommon(Remote obj, Method method, Object[] params, int opnum, long hash) throws Exception {
	UnicastConnection conn;
	try {
	conn = manager.getConnection();
	}
	catch (IOException e1) {
	throw new RemoteException("connection failed to host: " + manager.serverName, e1);
	}

	ObjectOutputStream out;
	DataOutputStream dout;
	try {
	dout = conn.getDataOutputStream();
	dout.writeByte(MESSAGE_CALL);

	out = conn.startObjectOutputStream(); // (re)start ObjectOutputStream

	objid.write(out);
	out.writeInt(opnum);
	out.writeLong(hash);

	// must handle primitive class and their wrapper classes
	Class clss[] = method.getParameterTypes();
	for(int i = 0; i < clss.length; i++)
	((RMIObjectOutputStream)out).writeValue(params[i], clss[i]);

	out.flush();
	}
	catch (IOException e2) {
	throw new RemoteException("call failed: ", e2);
	}

	int returncode;
	Object returnval;
	DataInputStream din;
	ObjectInputStream in;
	UID ack;
	try {
	din = conn.getDataInputStream();

	if ((returncode = din.readUnsignedByte()) != MESSAGE_CALL_ACK) {
	conn.disconnect();
	throw new RemoteException("Call not acked:" + returncode);
	}

	in = conn.startObjectInputStream(); // (re)start ObjectInputStream
	returncode = in.readUnsignedByte();
	ack = UID.read(in);

	Class cls = method.getReturnType();

	if (returncode == RETURN_NACK) {
	returnval = in.readObject(); // get Exception

	} else if(cls == Void.TYPE) {
	returnval = null;
	// in.readObject() // not required! returntype 'void' means no field is returned.
	} else {
	returnval = ((RMIObjectInputStream)in).readValue(cls); // get returnvalue
	}
	} catch (IOException e3) {
	//for debug: e3.printStackTrace();
	throw new RemoteException("call return failed: ", e3);
	}

	/* if DGCAck is necessary??
	//According to RMI wire protocol, send a DGCAck
	// to indicate receiving return value
	dout.writeByte(MESSAGE_DGCACK);
	ack.write(dout);
	out.flush();
	*/

	manager.discardConnection(conn);

	if (returncode != RETURN_ACK && returnval != null) {
	if (returncode == RETURN_NACK) throw (Exception)returnval;
	else throw new RemoteException("unexpected returncode: " + returncode);
	}

	return (returnval);
	}

	/**
	* @deprecated
	*/
	public RemoteCall newCall(RemoteObject obj, Operation[] op, int opnum, long hash) throws RemoteException {
	UnicastConnection conn;

	try {
	conn = manager.getConnection();
	}
	catch (IOException e1) {
	throw new RemoteException("connection failed to host: " + manager.serverName, e1);
	}

	//obj: useless?

	return (new UnicastRemoteCall(conn, objid, opnum, hash));
	}

	/**
	* @deprecated
	*/
	public void invoke(RemoteCall call) throws Exception {
	UnicastRemoteCall c = (UnicastRemoteCall)call;
	call.executeCall();
	}

	/**
	* @deprecated
	*/
	public void done(RemoteCall call) throws RemoteException {
	UnicastRemoteCall c = (UnicastRemoteCall)call;
	try{
	c.done();
	} catch(IOException e){}
	UnicastConnection conn = c.getConnection();
	manager.discardConnection(conn);
	}

	public void writeExternal(ObjectOutput out) throws IOException {
	if (manager == null) {
	throw new IOException("no connection");
	}
	manager.write(out);
	objid.write(out);
	// This byte is somewhat confusing when interoperating with JDK
	out.writeByte(0); //RETURN_ACK);
	}

	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");
	}
	}

	public boolean remoteEquals(RemoteRef ref) {
	throw new Error("Not implemented");
	}

	public int remoteHashCode() {
	throw new Error("Not implemented");
	}

	public String getRefClass(ObjectOutput out) {
	return ("UnicastRef");
	}

	public String remoteToString() {
	throw new Error("Not implemented");
	}

	public void dump(UnicastConnection conn) {
	try {
	DataInputStream din = conn.getDataInputStream();
	for (;;) {
	int b = din.readUnsignedByte();
	System.out.print(Integer.toHexString(b));
	if (b >= 32 && b < 128) {
	System.out.print(": " + (char)b);
	}
	System.out.println();
	}
	}
	catch (IOException _) {
	}
	}

	}