/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.mina.transport.vmpipe;
import java.io.IOException;
import java.net.SocketAddress;
import java.util.HashSet;
import java.util.Set;
import org.apache.mina.common.AbstractIoConnector;
import org.apache.mina.common.ConnectFuture;
import org.apache.mina.common.DefaultConnectFuture;
import org.apache.mina.common.ExceptionMonitor;
import org.apache.mina.common.IdleStatusChecker;
import org.apache.mina.common.IoFilterChain;
import org.apache.mina.common.IoFuture;
import org.apache.mina.common.IoFutureListener;
import org.apache.mina.common.IoHandler;
import org.apache.mina.common.IoSessionInitializer;
import org.apache.mina.common.TransportMetadata;
/**
* Connects to {@link IoHandler}s which is bound on the specified
* {@link VmPipeAddress}.
*
* @author The Apache MINA Project (dev@mina.apache.org)
* @version $Rev: 607163 $, $Date: 2007-12-28 12:20:07 +0900 (Fri, 28 Dec 2007) $
*/
public final class VmPipeConnector extends AbstractIoConnector {
/**
* Creates a new instance.
*/
public VmPipeConnector() {
super(new DefaultVmPipeSessionConfig());
}
public TransportMetadata getTransportMetadata() {
return VmPipeSessionImpl.METADATA;
}
@Override
public VmPipeSessionConfig getSessionConfig() {
return (VmPipeSessionConfig) super.getSessionConfig();
}
@Override
protected ConnectFuture connect0(SocketAddress remoteAddress,
SocketAddress localAddress,
IoSessionInitializer<? extends ConnectFuture> sessionInitializer) {
VmPipe entry = VmPipeAcceptor.boundHandlers.get(remoteAddress);
if (entry == null) {
return DefaultConnectFuture.newFailedFuture(new IOException(
"Endpoint unavailable: " + remoteAddress));
}
DefaultConnectFuture future = new DefaultConnectFuture();
// Assign the local address dynamically,
VmPipeAddress actualLocalAddress;
try {
actualLocalAddress = nextLocalAddress();
} catch (IOException e) {
return DefaultConnectFuture.newFailedFuture(e);
}
VmPipeSessionImpl localSession = new VmPipeSessionImpl(this,
getListeners(), actualLocalAddress, getHandler(), entry);
finishSessionInitialization(localSession, future, sessionInitializer);
// and reclaim the local address when the connection is closed.
localSession.getCloseFuture().addListener(LOCAL_ADDRESS_RECLAIMER);
// initialize connector session
try {
IoFilterChain filterChain = localSession.getFilterChain();
this.getFilterChainBuilder().buildFilterChain(filterChain);
// The following sentences don't throw any exceptions.
getListeners().fireSessionCreated(localSession);
IdleStatusChecker.getInstance().addSession(localSession);
} catch (Throwable t) {
future.setException(t);
return future;
}
// initialize acceptor session
VmPipeSessionImpl remoteSession = localSession.getRemoteSession();
((VmPipeAcceptor) remoteSession.getService()).doFinishSessionInitialization(remoteSession, null);
try {
IoFilterChain filterChain = remoteSession.getFilterChain();
entry.getAcceptor().getFilterChainBuilder().buildFilterChain(
filterChain);
// The following sentences don't throw any exceptions.
entry.getListeners().fireSessionCreated(remoteSession);
IdleStatusChecker.getInstance().addSession(remoteSession);
} catch (Throwable t) {
ExceptionMonitor.getInstance().exceptionCaught(t);
remoteSession.close();
}
// Start chains, and then allow and messages read/written to be processed. This is to ensure that
// sessionOpened gets received before a messageReceived
((VmPipeFilterChain) localSession.getFilterChain()).start();
((VmPipeFilterChain) remoteSession.getFilterChain()).start();
return future;
}
@Override
protected IoFuture dispose0() throws Exception {
return null;
}
private static final Set<VmPipeAddress> TAKEN_LOCAL_ADDRESSES = new HashSet<VmPipeAddress>();
private static int nextLocalPort = -1;
private static final IoFutureListener<IoFuture> LOCAL_ADDRESS_RECLAIMER = new LocalAddressReclaimer();
private static VmPipeAddress nextLocalAddress() throws IOException {
synchronized (TAKEN_LOCAL_ADDRESSES) {
if (nextLocalPort >= 0) {
nextLocalPort = -1;
}
for (int i = 0; i < Integer.MAX_VALUE; i++) {
VmPipeAddress answer = new VmPipeAddress(nextLocalPort--);
if (!TAKEN_LOCAL_ADDRESSES.contains(answer)) {
TAKEN_LOCAL_ADDRESSES.add(answer);
return answer;
}
}
}
throw new IOException("Can't assign a local VM pipe port.");
}
private static class LocalAddressReclaimer implements IoFutureListener<IoFuture> {
public void operationComplete(IoFuture future) {
synchronized (TAKEN_LOCAL_ADDRESSES) {
TAKEN_LOCAL_ADDRESSES.remove(future.getSession()
.getLocalAddress());
}
}
}
}