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/*
* 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.socket.nio;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.channels.DatagramChannel;
import java.util.Collections;
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.transport.socket.DatagramConnector;
import org.apache.mina.transport.socket.DatagramSessionConfig;
import org.apache.mina.transport.socket.DefaultDatagramSessionConfig;
/**
* {@link IoConnector} for datagram transport (UDP/IP).
*
* @author Apache MINA Project
*/
public final class NioDatagramConnector extends AbstractPollingIoConnector implements
DatagramConnector {
/**
* Creates a new instance.
*/
public NioDatagramConnector() {
super(new DefaultDatagramSessionConfig(), NioProcessor.class);
}
/**
* Creates a new instance.
*
* @param processorCount The number of IoProcessor instance to create
*/
public NioDatagramConnector(int processorCount) {
super(new DefaultDatagramSessionConfig(), NioProcessor.class, processorCount);
}
/**
* Creates a new instance.
*
* @param processor The IoProcessor instance to use
*/
public NioDatagramConnector(IoProcessor processor) {
super(new DefaultDatagramSessionConfig(), processor);
}
/**
* Constructor for {@link NioDatagramConnector} 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 SimpleIoProcessorPool#SimpleIoProcessorPool(Class, Executor, int, java.nio.channels.spi.SelectorProvider)
* @since 2.0.0-M4
*/
public NioDatagramConnector(Class> processorClass, int processorCount) {
super(new DefaultDatagramSessionConfig(), processorClass, processorCount);
}
/**
* Constructor for {@link NioDatagramConnector} 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 SimpleIoProcessorPool#SimpleIoProcessorPool(Class, Executor, int, java.nio.channels.spi.SelectorProvider)
* @since 2.0.0-M4
*/
public NioDatagramConnector(Class> processorClass) {
super(new DefaultDatagramSessionConfig(), processorClass);
}
/**
* {@inheritDoc}
*/
@Override
public TransportMetadata getTransportMetadata() {
return NioDatagramSession.METADATA;
}
/**
* {@inheritDoc}
*/
@Override
public DatagramSessionConfig getSessionConfig() {
return (DatagramSessionConfig) sessionConfig;
}
/**
* {@inheritDoc}
*/
@Override
public InetSocketAddress getDefaultRemoteAddress() {
return (InetSocketAddress) super.getDefaultRemoteAddress();
}
/**
* {@inheritDoc}
*/
@Override
public void setDefaultRemoteAddress(InetSocketAddress defaultRemoteAddress) {
super.setDefaultRemoteAddress(defaultRemoteAddress);
}
/**
* {@inheritDoc}
*/
@Override
protected void init() throws Exception {
// Do nothing
}
/**
* {@inheritDoc}
*/
@Override
protected DatagramChannel newHandle(SocketAddress localAddress) throws Exception {
DatagramChannel ch = DatagramChannel.open();
try {
if (localAddress != null) {
try {
ch.socket().bind(localAddress);
setDefaultLocalAddress(localAddress);
} catch (IOException ioe) {
// Add some info regarding the address we try to bind to the
// message
String newMessage = "Error while binding on " + localAddress + "\n" + "original message : "
+ ioe.getMessage();
Exception e = new IOException(newMessage);
e.initCause(ioe.getCause());
// and close the channel
ch.close();
throw e;
}
}
return ch;
} catch (Exception e) {
// If we got an exception while binding the datagram,
// we have to close it otherwise we will loose an handle
ch.close();
throw e;
}
}
/**
* {@inheritDoc}
*/
@Override
protected boolean connect(DatagramChannel handle, SocketAddress remoteAddress) throws Exception {
handle.connect(remoteAddress);
return true;
}
/**
* {@inheritDoc}
*/
@Override
protected NioSession newSession(IoProcessor processor, DatagramChannel handle) {
NioSession session = new NioDatagramSession(this, handle, processor);
session.getConfig().setAll(getSessionConfig());
return session;
}
/**
* {@inheritDoc}
*/
@Override
protected void close(DatagramChannel handle) throws Exception {
handle.disconnect();
handle.close();
}
/**
* {@inheritDoc}
*/
// Unused extension points.
@Override
protected Iterator allHandles() {
return Collections.emptyIterator();
}
/**
* {@inheritDoc}
*/
@Override
protected ConnectionRequest getConnectionRequest(DatagramChannel handle) {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
*/
@Override
protected void destroy() throws Exception {
// Do nothing
}
/**
* {@inheritDoc}
*/
@Override
protected boolean finishConnect(DatagramChannel handle) throws Exception {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
*/
@Override
protected void register(DatagramChannel handle, ConnectionRequest request) throws Exception {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
*/
@Override
protected int select(int timeout) throws Exception {
return 0;
}
/**
* {@inheritDoc}
*/
@Override
protected Iterator selectedHandles() {
return Collections.emptyIterator();
}
/**
* {@inheritDoc}
*/
@Override
protected void wakeup() {
// Do nothing
}
}
