corba/src/share/classes/com/sun/corba/se/impl/transport/BufferConnectionImpl.sjava
/*
* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.corba.se.impl.transport;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Collections;
import java.util.Hashtable;
import java.util.HashMap;
import java.util.Map;
import org.omg.CORBA.COMM_FAILURE;
import org.omg.CORBA.CompletionStatus;
import org.omg.CORBA.DATA_CONVERSION;
import org.omg.CORBA.INTERNAL;
import org.omg.CORBA.MARSHAL;
import org.omg.CORBA.OBJECT_NOT_EXIST;
import org.omg.CORBA.SystemException;
import com.sun.org.omg.SendingContext.CodeBase;
import com.sun.corba.se.pept.broker.Broker;
import com.sun.corba.se.pept.encoding.InputObject;
import com.sun.corba.se.pept.encoding.OutputObject;
import com.sun.corba.se.pept.protocol.MessageMediator;
import com.sun.corba.se.pept.transport.Acceptor;
import com.sun.corba.se.pept.transport.Connection;
import com.sun.corba.se.pept.transport.ConnectionCache;
import com.sun.corba.se.pept.transport.ContactInfo;
import com.sun.corba.se.pept.transport.EventHandler;
import com.sun.corba.se.pept.transport.InboundConnectionCache;
import com.sun.corba.se.pept.transport.OutboundConnectionCache;
import com.sun.corba.se.pept.transport.ResponseWaitingRoom;
import com.sun.corba.se.pept.transport.Selector;
import com.sun.corba.se.spi.ior.IOR;
import com.sun.corba.se.spi.ior.iiop.GIOPVersion;
import com.sun.corba.se.spi.logging.CORBALogDomains;
import com.sun.corba.se.spi.orb.ORB ;
import com.sun.corba.se.spi.orbutil.threadpool.Work;
import com.sun.corba.se.spi.protocol.CorbaMessageMediator;
import com.sun.corba.se.spi.transport.CorbaContactInfo;
import com.sun.corba.se.spi.transport.CorbaConnection;
import com.sun.corba.se.spi.transport.CorbaResponseWaitingRoom;
import com.sun.corba.se.impl.encoding.CachedCodeBase;
import com.sun.corba.se.impl.encoding.CDRInputStream_1_0;
import com.sun.corba.se.impl.encoding.CDROutputObject;
import com.sun.corba.se.impl.encoding.CDROutputStream_1_0;
import com.sun.corba.se.impl.encoding.CodeSetComponentInfo;
import com.sun.corba.se.impl.encoding.OSFCodeSetRegistry;
import com.sun.corba.se.impl.logging.ORBUtilSystemException;
import com.sun.corba.se.impl.orbutil.ORBConstants;
import com.sun.corba.se.impl.orbutil.ORBUtility;
import com.sun.corba.se.impl.protocol.giopmsgheaders.Message;
import com.sun.corba.se.impl.protocol.giopmsgheaders.MessageBase;
import com.sun.corba.se.impl.transport.CorbaResponseWaitingRoomImpl;
/**
* @author Ken Cavanaugh
*/
public class BufferConnectionImpl
extends
EventHandlerBase
implements
CorbaConnection,
Work
{
//
// New transport.
//
protected long enqueueTime;
public SocketChannel getSocketChannel()
{
return null;
}
// REVISIT:
// protected for test: genericRPCMSGFramework.IIOPConnection constructor.
//
// From iiop.Connection.java
//
protected long timeStamp = 0;
protected boolean isServer = false;
// Start at some value other than zero since this is a magic
// value in some protocols.
protected int requestId = 5;
protected CorbaResponseWaitingRoom responseWaitingRoom;
protected int state;
protected java.lang.Object stateEvent = new java.lang.Object();
protected java.lang.Object writeEvent = new java.lang.Object();
protected boolean writeLocked;
protected int serverRequestCount = 0;
// Server request map: used on the server side of Connection
// Maps request ID to IIOPInputStream.
Map serverRequestMap = new HashMap() ;
// This is a flag associated per connection telling us if the
// initial set of sending contexts were sent to the receiver
// already...
protected boolean postInitialContexts = false;
// Remote reference to CodeBase server (supplies
// FullValueDescription, among other things)
protected IOR codeBaseServerIOR;
// CodeBase cache for this connection. This will cache remote operations,
// handle connecting, and ensure we don't do any remote operations until
// necessary.
protected CachedCodeBase cachedCodeBase = new CachedCodeBase(this);
protected ORBUtilSystemException wrapper ;
List buffers ;
public BufferConnectionImpl(ORB orb, byte[][] data )
{
this.orb = orb;
wrapper = ORBUtilSystemException.get( orb,
CORBALogDomains.RPC_TRANSPORT ) ;
buffers = new ArrayList() ;
}
////////////////////////////////////////////////////
//
// framework.transport.Connection
//
public boolean shouldRegisterReadEvent()
{
return false;
}
public boolean shouldRegisterServerReadEvent()
{
return false;
}
public boolean read()
{
return true ;
}
protected CorbaMessageMediator readBits()
{
return null ;
}
protected boolean dispatch(CorbaMessageMediator messageMediator)
{
}
public boolean shouldUseDirectByteBuffers()
{
return false ;
}
// Only called from readGIOPMessage with (12, 0, 12) as arguments
// size is size of buffer to create
// offset is offset from start of message in buffer
// length is length to read
public ByteBuffer read(int size, int offset, int length)
throws IOException
{
byte[] buf = new byte[size];
readFully( buf, offset, length);
ByteBuffer byteBuffer = ByteBuffer.wrap(buf);
byteBuffer.limit(size);
return byteBuffer;
}
// Only called as read( buf, 12, msgsize-12 ) in readGIOPMessage
// We can ignore the byteBuffer parameter
// offset is the starting position to place data in the result
// length is the length of the data to read
public ByteBuffer read(ByteBuffer byteBuffer, int offset, int length)
throws IOException
{
int size = offset + length;
byte[] buf = new byte[size];
readFully(buf, offset, length);
return ByteBuffer.wrap(buf);
}
// Read size bytes from buffer list and place the data
// starting at offset in buf.
public void readFully(byte[] buf, int offset, int size)
throws IOException
{
int remaining = size ;
int position = offset ;
while (remaining > 0) {
ByteBuffer buff = (ByteBuffer)buffers.get(0) ;
int dataSize = buff.remaining() ;
int xferSize = dataSize ;
if (dataSize >= remaining) :
xferSize = remaining ;
buffers.remove(0) ;
}
buff.get( buf, offset, xferSize ) ;
offset += xferSize ;
remaining -= xferSize ;
}
}
public void write(ByteBuffer byteBuffer)
throws IOException
{
buffers.add( byteBuffer ) ;
}
/**
* Note:it is possible for this to be called more than once
*/
public synchronized void close()
{
}
public Acceptor getAcceptor()
{
return null;
}
public ContactInfo getContactInfo()
{
return null;
}
public EventHandler getEventHandler()
{
return this;
}
public OutputObject createOutputObject(MessageMediator messageMediator)
{
// REVISIT - remove this method from Connection and all it subclasses.
throw new RuntimeException("*****SocketOrChannelConnectionImpl.createOutputObject - should not be called.");
}
// This is used by the GIOPOutputObject in order to
// throw the correct error when handling code sets.
// Can we determine if we are on the server side by
// other means? XREVISIT
public boolean isServer()
{
return isServer;
}
public boolean isBusy()
{
return false ;
}
public long getTimeStamp()
{
return timeStamp;
}
public void setTimeStamp(long time)
{
timeStamp = time;
}
public void setState(String stateString)
{
synchronized (stateEvent) {
if (stateString.equals("ESTABLISHED")) {
state = ESTABLISHED;
stateEvent.notifyAll();
} else {
// REVISIT: ASSERT
}
}
}
public void writeLock()
{
}
public void writeUnlock()
{
}
public void sendWithoutLock(OutputObject outputObject)
{
}
public void registerWaiter(MessageMediator messageMediator)
{
}
public void unregisterWaiter(MessageMediator messageMediator)
{
}
public InputObject waitForResponse(MessageMediator messageMediator)
{
return null ;
}
public void setConnectionCache(ConnectionCache connectionCache)
{
}
public ConnectionCache getConnectionCache()
{
return null;
}
////////////////////////////////////////////////////
//
// EventHandler methods
//
public SelectableChannel getChannel()
{
return null;
}
public int getInterestOps()
{
return null;
}
// public Acceptor getAcceptor() - already defined above.
public Connection getConnection()
{
return this;
}
////////////////////////////////////////////////////
//
// Work methods.
//
public String getName()
{
return this.toString();
}
public void doWork()
{
}
public void setEnqueueTime(long timeInMillis)
{
enqueueTime = timeInMillis;
}
public long getEnqueueTime()
{
return enqueueTime;
}
////////////////////////////////////////////////////
//
// spi.transport.CorbaConnection.
//
public ResponseWaitingRoom getResponseWaitingRoom()
{
return null ;
}
// REVISIT - inteface defines isServer but already defined in
// higher interface.
public void serverRequestMapPut(int requestId,
CorbaMessageMediator messageMediator)
{
serverRequestMap.put(new Integer(requestId), messageMediator);
}
public CorbaMessageMediator serverRequestMapGet(int requestId)
{
return (CorbaMessageMediator)
serverRequestMap.get(new Integer(requestId));
}
public void serverRequestMapRemove(int requestId)
{
serverRequestMap.remove(new Integer(requestId));
}
// REVISIT: this is also defined in:
// com.sun.corba.se.spi.legacy.connection.Connection
public java.net.Socket getSocket()
{
return null;
}
/** It is possible for a Close Connection to have been
** sent here, but we will not check for this. A "lazy"
** Exception will be thrown in the Worker thread after the
** incoming request has been processed even though the connection
** is closed before the request is processed. This is o.k because
** it is a boundary condition. To prevent it we would have to add
** more locks which would reduce performance in the normal case.
**/
public synchronized void serverRequestProcessingBegins()
{
serverRequestCount++;
}
public synchronized void serverRequestProcessingEnds()
{
serverRequestCount--;
}
//
//
//
public synchronized int getNextRequestId()
{
return requestId++;
}
// Negotiated code sets for char and wchar data
protected CodeSetComponentInfo.CodeSetContext codeSetContext = null;
public ORB getBroker()
{
return orb;
}
public CodeSetComponentInfo.CodeSetContext getCodeSetContext()
{
// Needs to be synchronized for the following case when the client
// doesn't send the code set context twice, and we have two threads
// in ServerRequestDispatcher processCodeSetContext.
//
// Thread A checks to see if there is a context, there is none, so
// it calls setCodeSetContext, getting the synch lock.
// Thread B checks to see if there is a context. If we didn't synch,
// it might decide to outlaw wchar/wstring.
if (codeSetContext == null) {
synchronized(this) {
return codeSetContext;
}
}
return codeSetContext;
}
public synchronized void setCodeSetContext(CodeSetComponentInfo.CodeSetContext csc) {
// Double check whether or not we need to do this
if (codeSetContext == null) {
if (OSFCodeSetRegistry.lookupEntry(csc.getCharCodeSet()) == null ||
OSFCodeSetRegistry.lookupEntry(csc.getWCharCodeSet()) == null) {
// If the client says it's negotiated a code set that
// isn't a fallback and we never said we support, then
// it has a bug.
throw wrapper.badCodesetsFromClient() ;
}
codeSetContext = csc;
}
}
//
// from iiop.IIOPConnection.java
//
// Map request ID to an InputObject.
// This is so the client thread can start unmarshaling
// the reply and remove it from the out_calls map while the
// ReaderThread can still obtain the input stream to give
// new fragments. Only the ReaderThread touches the clientReplyMap,
// so it doesn't incur synchronization overhead.
public MessageMediator clientRequestMapGet(int requestId)
{
return null ;
}
protected MessageMediator clientReply_1_1;
public void clientReply_1_1_Put(MessageMediator x)
{
clientReply_1_1 = x;
}
public MessageMediator clientReply_1_1_Get()
{
return clientReply_1_1;
}
public void clientReply_1_1_Remove()
{
clientReply_1_1 = null;
}
protected MessageMediator serverRequest_1_1;
public void serverRequest_1_1_Put(MessageMediator x)
{
serverRequest_1_1 = x;
}
public MessageMediator serverRequest_1_1_Get()
{
return serverRequest_1_1;
}
public void serverRequest_1_1_Remove()
{
serverRequest_1_1 = null;
}
protected String getStateString( int state )
{
synchronized ( stateEvent ){
switch (state) {
case OPENING : return "OPENING" ;
case ESTABLISHED : return "ESTABLISHED" ;
case CLOSE_SENT : return "CLOSE_SENT" ;
case CLOSE_RECVD : return "CLOSE_RECVD" ;
case ABORT : return "ABORT" ;
default : return "???" ;
}
}
}
public synchronized boolean isPostInitialContexts() {
return postInitialContexts;
}
// Can never be unset...
public synchronized void setPostInitialContexts(){
postInitialContexts = true;
}
/**
* Wake up the outstanding requests on the connection, and hand them
* COMM_FAILURE exception with a given minor code.
*
* Also, delete connection from connection table and
* stop the reader thread.
* Note that this should only ever be called by the Reader thread for
* this connection.
*
* @param minor_code The minor code for the COMM_FAILURE major code.
* @param die Kill the reader thread (this thread) before exiting.
*/
public void purgeCalls(SystemException systemException,
boolean die, boolean lockHeld)
{
}
/*************************************************************************
* The following methods are for dealing with Connection cleaning for
* better scalability of servers in high network load conditions.
**************************************************************************/
public void sendCloseConnection(GIOPVersion giopVersion)
throws IOException
{
Message msg = MessageBase.createCloseConnection(giopVersion);
sendHelper(giopVersion, msg);
}
public void sendMessageError(GIOPVersion giopVersion)
throws IOException
{
Message msg = MessageBase.createMessageError(giopVersion);
sendHelper(giopVersion, msg);
}
/**
* Send a CancelRequest message. This does not lock the connection, so the
* caller needs to ensure this method is called appropriately.
* @exception IOException - could be due to abortive connection closure.
*/
public void sendCancelRequest(GIOPVersion giopVersion, int requestId)
throws IOException
{
Message msg = MessageBase.createCancelRequest(giopVersion, requestId);
sendHelper(giopVersion, msg);
}
protected void sendHelper(GIOPVersion giopVersion, Message msg)
throws IOException
{
// REVISIT: See comments in CDROutputObject constructor.
CDROutputObject outputObject =
new CDROutputObject((ORB)orb, null, giopVersion, this, msg,
ORBConstants.STREAM_FORMAT_VERSION_1);
msg.write(outputObject);
outputObject.writeTo(this);
}
public void sendCancelRequestWithLock(GIOPVersion giopVersion,
int requestId)
throws IOException
{
writeLock();
try {
sendCancelRequest(giopVersion, requestId);
} finally {
writeUnlock();
}
}
// Begin Code Base methods ---------------------------------------
//
// Set this connection's code base IOR. The IOR comes from the
// SendingContext. This is an optional service context, but all
// JavaSoft ORBs send it.
//
// The set and get methods don't need to be synchronized since the
// first possible get would occur during reading a valuetype, and
// that would be after the set.
// Sets this connection's code base IOR. This is done after
// getting the IOR out of the SendingContext service context.
// Our ORBs always send this, but it's optional in CORBA.
public final void setCodeBaseIOR(IOR ior) {
codeBaseServerIOR = ior;
}
public final IOR getCodeBaseIOR() {
return codeBaseServerIOR;
}
// Get a CodeBase stub to use in unmarshaling. The CachedCodeBase
// won't connect to the remote codebase unless it's necessary.
public final CodeBase getCodeBase() {
return cachedCodeBase;
}
// End Code Base methods -----------------------------------------
// Can be overridden in subclass for different options.
protected void setSocketOptions(Socket socket)
{
}
public String toString()
{
synchronized ( stateEvent ){
return
"BufferConnectionImpl[" + " "
+ getStateString( state ) + " "
+ shouldUseSelectThreadToWait() + " "
+ shouldUseWorkerThreadForEvent()
+ "]" ;
}
}
// Must be public - used in encoding.
public void dprint(String msg)
{
ORBUtility.dprint("SocketOrChannelConnectionImpl", msg);
}
protected void dprint(String msg, Throwable t)
{
dprint(msg);
t.printStackTrace(System.out);
}
}
// End of file.