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/**
* Copyright 2007-2015, Kaazing Corporation. All rights reserved.
*
* 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.
*/
/** The copyright above pertains to portions created by Kaazing */
package org.apache.mina.transport.socket.nio;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.util.Collection;
import java.util.Iterator;
import java.util.concurrent.Executor;
import org.apache.mina.core.polling.AbstractPollingIoConnector;
import org.apache.mina.core.service.IoConnector;
import org.apache.mina.core.service.IoProcessor;
import org.apache.mina.core.service.SimpleIoProcessorPool;
import org.apache.mina.core.service.TransportMetadata;
import org.apache.mina.core.session.AbstractIoSessionConfig;
import org.apache.mina.transport.socket.DefaultSocketSessionConfig;
import org.apache.mina.transport.socket.SocketConnector;
import org.apache.mina.transport.socket.SocketSessionConfig;
/**
* {@link IoConnector} for socket transport (TCP/IP).
*
* @author Apache MINA Project
*/
public final class NioSocketConnector
extends AbstractPollingIoConnector
implements SocketConnector {
private volatile Selector selector;
/**
* Constructor for {@link NioSocketConnector} with default configuration (multiple thread model).
*/
public NioSocketConnector() {
super(new DefaultSocketSessionConfig(), NioProcessor.class);
((DefaultSocketSessionConfig) getSessionConfig()).init(this);
}
/**
* Constructor for {@link NioSocketConnector} with default configuration, and
* given number of {@link NioProcessor} for multithreading I/O operations
* @param processorCount the number of processor to create and place in a
* {@link SimpleIoProcessorPool}
*/
public NioSocketConnector(int processorCount) {
super(new DefaultSocketSessionConfig(), NioProcessor.class, processorCount);
((DefaultSocketSessionConfig) getSessionConfig()).init(this);
}
/**
* Constructor for {@link NioSocketConnector} with default configuration but a
* specific {@link IoProcessor}, useful for sharing the same processor over multiple
* {@link IoService} of the same type.
* @param processor the processor to use for managing I/O events
*/
public NioSocketConnector(IoProcessor processor) {
super(new DefaultSocketSessionConfig(), processor);
((DefaultSocketSessionConfig) getSessionConfig()).init(this);
}
/**
* Constructor for {@link NioSocketConnector} with a given {@link Executor} for handling
* connection events and a given {@link IoProcessor} for handling I/O events, useful for sharing
* the same processor and executor over multiple {@link IoService} of the same type.
* @param executor the executor for connection
* @param processor the processor for I/O operations
*/
public NioSocketConnector(Executor executor, IoProcessor processor) {
super(new DefaultSocketSessionConfig(), executor, processor);
((DefaultSocketSessionConfig) getSessionConfig()).init(this);
}
/**
* Constructor for {@link NioSocketConnector} with default configuration which will use a built-in
* thread pool executor to manage the given number of processor instances. The processor class must have
* a constructor that accepts ExecutorService or Executor as its single argument, or, failing that, a
* no-arg constructor.
*
* @param processorClass the processor class.
* @param processorCount the number of processors to instantiate.
* @see org.apache.mina.core.service.SimpleIoProcessorPool#SimpleIoProcessorPool(Class, Executor, int)
* @since 2.0.0-M4
*/
public NioSocketConnector(Class> processorClass,
int processorCount) {
super(new DefaultSocketSessionConfig(), processorClass, processorCount);
}
/**
* Constructor for {@link NioSocketConnector} with default configuration with default configuration which will use a built-in
* thread pool executor to manage the default number of processor instances. The processor class must have
* a constructor that accepts ExecutorService or Executor as its single argument, or, failing that, a
* no-arg constructor. The default number of instances is equal to the number of processor cores
* in the system, plus one.
*
* @param processorClass the processor class.
* @see org.apache.mina.core.service.SimpleIoProcessorPool#SimpleIoProcessorPool(Class, Executor, int)
* @see org.apache.mina.core.service.SimpleIoProcessorPool#DEFAULT_SIZE
* @since 2.0.0-M4
*/
public NioSocketConnector(Class> processorClass) {
super(new DefaultSocketSessionConfig(), processorClass);
}
/**
* {@inheritDoc}
*/
@Override
protected void init() throws Exception {
this.selector = Selector.open();
}
/**
* {@inheritDoc}
*/
@Override
protected void destroy() throws Exception {
if (selector != null) {
selector.close();
}
}
/**
* {@inheritDoc}
*/
public TransportMetadata getTransportMetadata() {
return NioSocketSession.METADATA;
}
/**
* {@inheritDoc}
*/
@Override
public SocketSessionConfig getSessionConfig() {
return (SocketSessionConfig) super.getSessionConfig();
}
/**
* {@inheritDoc}
*/
@Override
public InetSocketAddress getDefaultRemoteAddress() {
return (InetSocketAddress) super.getDefaultRemoteAddress();
}
/**
* {@inheritDoc}
*/
public void setDefaultRemoteAddress(InetSocketAddress defaultRemoteAddress) {
super.setDefaultRemoteAddress(defaultRemoteAddress);
}
/**
* {@inheritDoc}
*/
@Override
protected Iterator allHandles() {
return new SocketChannelIterator(selector.keys());
}
/**
* {@inheritDoc}
*/
@Override
protected boolean connect(SocketChannel handle, SocketAddress remoteAddress)
throws Exception {
return handle.connect(remoteAddress);
}
/**
* {@inheritDoc}
*/
@Override
protected ConnectionRequest getConnectionRequest(SocketChannel handle) {
SelectionKey key = handle.keyFor(selector);
if ((key == null) || (!key.isValid())) {
return null;
}
return (ConnectionRequest) key.attachment();
}
/**
* {@inheritDoc}
*/
@Override
protected void close(SocketChannel handle) throws Exception {
SelectionKey key = handle.keyFor(selector);
if (key != null) {
key.cancel();
}
handle.close();
}
/**
* {@inheritDoc}
*/
@Override
protected boolean finishConnect(SocketChannel handle) throws Exception {
if (handle.finishConnect()) {
SelectionKey key = handle.keyFor(selector);
if (key != null) {
key.cancel();
}
return true;
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
protected SocketChannel newHandle(SocketAddress localAddress)
throws Exception {
SocketChannel ch = SocketChannel.open();
int receiveBufferSize =
(getSessionConfig()).getReceiveBufferSize();
if (receiveBufferSize > 65535) {
if (AbstractIoSessionConfig.ENABLE_BUFFER_SIZE) {
System.out.println("NioSocketConnector.newHandle("+receiveBufferSize+")");
ch.socket().setReceiveBufferSize(receiveBufferSize);
}
}
if (localAddress != null) {
ch.socket().bind(localAddress);
}
ch.configureBlocking(false);
return ch;
}
/**
* {@inheritDoc}
*/
@Override
protected NioSession newSession(IoProcessor processor, SocketChannel handle) {
final NioSocketSession nioSocketSession = new NioSocketSession(this, processor, handle);
// NB: We do not catch the RuntimeIoException for this
// call because catching one and returning null leads to NPE.
nioSocketSession.initSessionConfig();
return nioSocketSession;
}
/**
* {@inheritDoc}
*/
@Override
protected void register(SocketChannel handle, ConnectionRequest request)
throws Exception {
handle.register(selector, SelectionKey.OP_CONNECT, request);
}
/**
* {@inheritDoc}
*/
@Override
protected int select(int timeout) throws Exception {
return selector.select(timeout);
}
/**
* {@inheritDoc}
*/
@Override
protected Iterator selectedHandles() {
return new SocketChannelIterator(selector.selectedKeys());
}
/**
* {@inheritDoc}
*/
@Override
protected void wakeup() {
selector.wakeup();
}
private static class SocketChannelIterator implements Iterator {
private final Iterator i;
private SocketChannelIterator(Collection selectedKeys) {
this.i = selectedKeys.iterator();
}
/**
* {@inheritDoc}
*/
public boolean hasNext() {
return i.hasNext();
}
/**
* {@inheritDoc}
*/
public SocketChannel next() {
SelectionKey key = i.next();
return (SocketChannel) key.channel();
}
/**
* {@inheritDoc}
*/
public void remove() {
i.remove();
}
}
}