| /* |
| * 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 java.util.concurrent.Executor; |
| |
| import org.apache.mina.core.filterchain.IoFilterChain; |
| import org.apache.mina.core.future.ConnectFuture; |
| import org.apache.mina.core.future.DefaultConnectFuture; |
| import org.apache.mina.core.future.IoFuture; |
| import org.apache.mina.core.future.IoFutureListener; |
| import org.apache.mina.core.service.AbstractIoConnector; |
| import org.apache.mina.core.service.IoHandler; |
| import org.apache.mina.core.service.TransportMetadata; |
| import org.apache.mina.core.session.IdleStatusChecker; |
| import org.apache.mina.core.session.IoSessionInitializer; |
| import org.apache.mina.util.ExceptionMonitor; |
| |
| /** |
| * Connects to {@link IoHandler}s which is bound on the specified |
| * {@link VmPipeAddress}. |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public final class VmPipeConnector extends AbstractIoConnector { |
| |
| // object used for checking session idle |
| private IdleStatusChecker idleChecker; |
| |
| /** |
| * Creates a new instance. |
| */ |
| public VmPipeConnector() { |
| this(null); |
| } |
| |
| /** |
| * Creates a new instance. |
| * |
| * @param executor The executor to use |
| */ |
| public VmPipeConnector(Executor executor) { |
| super(new DefaultVmPipeSessionConfig(), executor); |
| idleChecker = new IdleStatusChecker(); |
| // we schedule the idle status checking task in this service exceutor |
| // it will be woke up every seconds |
| executeWorker(idleChecker.getNotifyingTask(), "idleStatusChecker"); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public TransportMetadata getTransportMetadata() { |
| return VmPipeSession.METADATA; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public VmPipeSessionConfig getSessionConfig() { |
| return (VmPipeSessionConfig) sessionConfig; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @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); |
| } |
| |
| VmPipeSession localSession = new VmPipeSession(this, getListeners(), actualLocalAddress, getHandler(), entry); |
| |
| initSession(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); |
| idleChecker.addSession(localSession); |
| } catch (Exception e) { |
| future.setException(e); |
| return future; |
| } |
| |
| // initialize acceptor session |
| VmPipeSession 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); |
| idleChecker.addSession(remoteSession); |
| } catch (Exception e) { |
| ExceptionMonitor.getInstance().exceptionCaught(e); |
| remoteSession.closeNow(); |
| } |
| |
| // 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; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected void dispose0() throws Exception { |
| // stop the idle checking task |
| idleChecker.getNotifyingTask().cancel(); |
| } |
| |
| 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()); |
| } |
| } |
| } |
| } |