/*
* Copyright 2010 the original author or authors.
*
* Licensed 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.gradle.messaging.remote.internal.inet;
import org.gradle.api.Action;
import org.gradle.internal.UncheckedException;
import org.gradle.internal.concurrent.CompositeStoppable;
import org.gradle.internal.concurrent.ExecutorFactory;
import org.gradle.internal.concurrent.StoppableExecutor;
import org.gradle.internal.id.IdGenerator;
import org.gradle.messaging.remote.Address;
import org.gradle.messaging.remote.ConnectionAcceptor;
import org.gradle.messaging.remote.internal.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.List;
public class TcpIncomingConnector implements IncomingConnector {
private static final Logger LOGGER = LoggerFactory.getLogger(TcpIncomingConnector.class);
private final ExecutorFactory executorFactory;
private final InetAddressFactory addressFactory;
private final IdGenerator<?> idGenerator;
public TcpIncomingConnector(ExecutorFactory executorFactory, InetAddressFactory addressFactory, IdGenerator<?> idGenerator) {
this.executorFactory = executorFactory;
this.addressFactory = addressFactory;
this.idGenerator = idGenerator;
}
public ConnectionAcceptor accept(Action<ConnectCompletion> action, boolean allowRemote) {
final ServerSocketChannel serverSocket;
int localPort;
try {
serverSocket = ServerSocketChannel.open();
serverSocket.socket().bind(new InetSocketAddress(addressFactory.findLocalBindingAddress(), 0));
localPort = serverSocket.socket().getLocalPort();
} catch (Exception e) {
throw UncheckedException.throwAsUncheckedException(e);
}
Object id = idGenerator.generateId();
List<InetAddress> addresses = allowRemote ? addressFactory.findRemoteAddresses() : addressFactory.findLocalAddresses();
final Address address = new MultiChoiceAddress(id, localPort, addresses);
LOGGER.debug("Listening on {}.", address);
final StoppableExecutor executor = executorFactory.create(String.format("Incoming %s TCP Connector on port %s", allowRemote ? "remote" : "local", localPort));
executor.execute(new Receiver(serverSocket, action, allowRemote));
return new ConnectionAcceptor() {
public Address getAddress() {
return address;
}
public void requestStop() {
CompositeStoppable.stoppable(serverSocket).stop();
}
public void stop() {
requestStop();
executor.stop();
}
};
}
private class Receiver implements Runnable {
private final ServerSocketChannel serverSocket;
private final Action<ConnectCompletion> action;
private final boolean allowRemote;
public Receiver(ServerSocketChannel serverSocket, Action<ConnectCompletion> action, boolean allowRemote) {
this.serverSocket = serverSocket;
this.action = action;
this.allowRemote = allowRemote;
}
public void run() {
try {
try {
while (true) {
final SocketChannel socket = serverSocket.accept();
InetSocketAddress remoteSocketAddress = (InetSocketAddress) socket.socket().getRemoteSocketAddress();
InetAddress remoteInetAddress = remoteSocketAddress.getAddress();
if (!allowRemote && !addressFactory.isLocal(remoteInetAddress)) {
LOGGER.error("Cannot accept connection from remote address {}.", remoteInetAddress);
socket.close();
continue;
}
LOGGER.debug("Accepted connection from {} to {}.", socket.socket().getRemoteSocketAddress(), socket.socket().getLocalSocketAddress());
action.execute(new SocketConnectCompletion(socket));
}
} catch (ClosedChannelException e) {
// Ignore
} catch (Exception e) {
LOGGER.error("Could not accept remote connection.", e);
}
} finally {
CompositeStoppable.stoppable(serverSocket).stop();
}
}
}
}