Initial revision

From-SVN: r102074
2005-07-16 00:30:23 +00:00
parent 6f4434b39b
commit f911ba985a
4557 changed files with 1000262 additions and 0 deletions
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+/* UnicastServer.java --
+   Copyright (c) 1996, 1997, 1998, 1999, 2002, 2004
+   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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 gnu.java.rmi.dgc.DGCImpl;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.rmi.NoSuchObjectException;
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+import java.rmi.ServerError;
+import java.rmi.server.ObjID;
+import java.rmi.server.UID;
+import java.util.Hashtable;
+
+public class UnicastServer
+	implements ProtocolConstants {
+
+static private Hashtable objects = new Hashtable();  //mapping OBJID to server ref
+static private Hashtable refcache = new Hashtable(); //mapping obj itself to server ref
+static private DGCImpl dgc;
+
+public static void exportObject(UnicastServerRef obj) {
+	startDGC();
+	objects.put(obj.objid, obj);
+	refcache.put(obj.myself, obj);
+	obj.manager.startServer();
+}
+
+// FIX ME: I haven't handle force parameter
+public static boolean unexportObject(UnicastServerRef obj, boolean force) {
+	objects.remove(obj.objid);
+	refcache.remove(obj.myself);
+	obj.manager.stopServer();
+	return true;
+}
+
+public static UnicastServerRef getExportedRef(Remote remote){
+    return (UnicastServerRef)refcache.get(remote);
+}
+
+private static synchronized void startDGC() {
+	if (dgc == null) {
+		try {
+			dgc = new DGCImpl();
+			// Changed DGCImpl to inherit UnicastServerRef directly
+			//((UnicastServerRef)dgc.getRef()).exportObject(dgc);
+			dgc.exportObject(dgc);
+		}
+		catch (RemoteException e) {
+			e.printStackTrace();
+		}
+	}
+}
+
+public static void dispatch(UnicastConnection conn) throws Exception {
+	switch (conn.getDataInputStream().readUnsignedByte()) {
+	case MESSAGE_CALL:
+		incomingMessageCall(conn);
+		break;
+	case MESSAGE_PING:  
+		// jdk sends a ping before each method call -> answer it!
+		DataOutputStream out = conn.getDataOutputStream();
+		out.writeByte(MESSAGE_PING_ACK);
+		out.flush();
+		break;
+	default:
+		throw new Exception("bad method type");
+	}
+}
+
+private static void incomingMessageCall(UnicastConnection conn) throws IOException {
+	ObjectInputStream in = conn.startObjectInputStream();  // (re)start ObjectInputStream
+
+	ObjID objid = ObjID.read(in);
+	int method = in.readInt();
+	long hash = in.readLong();
+
+//System.out.println("ObjID: " + objid + ", method: " + method + ", hash: " + hash);
+
+	// Use the objid to locate the relevant UnicastServerRef
+	UnicastServerRef uref = (UnicastServerRef)objects.get(objid);
+	Object returnval;
+	int returncode = RETURN_ACK;
+	// returnval is from Method.invoke(), so we must check the return class to see
+	// if it's primitive type
+	Class returncls = null;
+	if (uref != null) {
+		try {
+			// Dispatch the call to it.
+			returnval = uref.incomingMessageCall(conn, method, hash);
+			returncls = uref.getMethodReturnType(method, hash);
+		}
+		catch (Exception e) {
+			returnval = e;
+			returncode = RETURN_NACK;
+		}
+                catch (Error e) {
+			returnval = new ServerError ("An Error is thrown while processing the invocation on the server", e);
+			returncode = RETURN_NACK;
+                }
+	}
+	else {
+		returnval = new NoSuchObjectException("");
+		returncode = RETURN_NACK;
+	}
+
+	conn.getDataOutputStream().writeByte(MESSAGE_CALL_ACK);
+
+	ObjectOutputStream out = conn.startObjectOutputStream();   // (re)start ObjectOutputStream
+
+	out.writeByte(returncode);
+	(new UID()).write(out);
+
+	//System.out.println("returnval=" + returnval + " returncls=" + returncls);
+
+	if(returnval != null && returncls != null)
+	    ((RMIObjectOutputStream)out).writeValue(returnval, returncls);
+
+	// 1.1/1.2 void return type detection:
+	else if (!(returnval instanceof RMIVoidValue || returncls == Void.TYPE)) 
+	    out.writeObject(returnval);
+
+	out.flush();
+}
+
+}