| /* |
| * 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 <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public final class NioDatagramConnector extends AbstractPollingIoConnector<NioSession, DatagramChannel> 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<NioSession> 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<? extends IoProcessor<NioSession>> 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<? extends IoProcessor<NioSession>> 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<NioSession> 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<DatagramChannel> 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<DatagramChannel> selectedHandles() { |
| return Collections.emptyIterator(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected void wakeup() { |
| // Do nothing |
| } |
| } |