org.springframework.boot.devtools.tunnel.server.SocketTargetServerConnection Maven / Gradle / Ivy
/*
* Copyright 2012-2017 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
*
* https://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.springframework.boot.devtools.tunnel.server;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ByteChannel;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.SocketChannel;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.Assert;
/**
* Socket based {@link TargetServerConnection}.
*
* @author Phillip Webb
* @since 1.3.0
*/
public class SocketTargetServerConnection implements TargetServerConnection {
private static final Log logger = LogFactory
.getLog(SocketTargetServerConnection.class);
private final PortProvider portProvider;
/**
* Create a new {@link SocketTargetServerConnection}.
* @param portProvider the port provider
*/
public SocketTargetServerConnection(PortProvider portProvider) {
Assert.notNull(portProvider, "PortProvider must not be null");
this.portProvider = portProvider;
}
@Override
public ByteChannel open(int socketTimeout) throws IOException {
SocketAddress address = new InetSocketAddress(this.portProvider.getPort());
logger.trace("Opening tunnel connection to target server on " + address);
SocketChannel channel = SocketChannel.open(address);
channel.socket().setSoTimeout(socketTimeout);
return new TimeoutAwareChannel(channel);
}
/**
* Wrapper to expose the {@link SocketChannel} in such a way that
* {@code SocketTimeoutExceptions} are still thrown from read methods.
*/
private static class TimeoutAwareChannel implements ByteChannel {
private final SocketChannel socketChannel;
private final ReadableByteChannel readChannel;
TimeoutAwareChannel(SocketChannel socketChannel) throws IOException {
this.socketChannel = socketChannel;
this.readChannel = Channels
.newChannel(socketChannel.socket().getInputStream());
}
@Override
public int read(ByteBuffer dst) throws IOException {
return this.readChannel.read(dst);
}
@Override
public int write(ByteBuffer src) throws IOException {
return this.socketChannel.write(src);
}
@Override
public boolean isOpen() {
return this.socketChannel.isOpen();
}
@Override
public void close() throws IOException {
this.socketChannel.close();
}
}
}