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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
DatagramSocketSynchChannel.java | 0% | 0% | 0% | 0% |
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/**
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*
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* Copyright 2004 Hiram Chirino
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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**/
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package org.activeio.net;
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import java.io.IOException;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.SocketException;
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import java.net.SocketTimeoutException;
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import org.activeio.Packet;
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import org.activeio.SynchChannel;
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import org.activeio.SynchChannelServer;
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import org.activeio.Packet.ByteSequence;
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import org.activeio.packet.ByteArrayPacket;
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import org.activeio.packet.FilterPacket;
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/**
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* A {@see org.activeio.SynchChannel}implementation that uses
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* TCP to talk to the network.
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*
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* @version $Revision$
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*/
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final public class DatagramSocketSynchChannel implements SynchChannel { |
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private final class UDPFilterPacket extends FilterPacket { |
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private final DatagramPacket packet;
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private UDPFilterPacket(Packet next, DatagramPacket packet) {
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super(next);
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this.packet = packet;
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} |
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public Object narrow(Class target) {
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if( target == DatagramContext.class ) { |
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return new DatagramContext(packet); |
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} |
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return super.narrow(target); |
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} |
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public Packet filter(Packet packet) {
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return new UDPFilterPacket(packet, this.packet); |
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} |
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} |
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private static final int DEFAULT_BUFFER_SIZE = 64 * 1024; |
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private final DatagramSocket socket;
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private boolean disposed; |
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private int curentSoTimeout; |
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/**
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* Construct basic helpers
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*
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* @param wireFormat
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* @throws IOException
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*/
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protected DatagramSocketSynchChannel(DatagramSocket socket) throws IOException { |
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this.socket = socket;
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socket.setReceiveBufferSize(DEFAULT_BUFFER_SIZE); |
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socket.setSendBufferSize(DEFAULT_BUFFER_SIZE); |
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} |
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/**
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* @see org.activeio.SynchChannel#read(long)
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*/
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public org.activeio.Packet read(long timeout) throws IOException { |
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try {
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if (timeout == SynchChannelServer.WAIT_FOREVER_TIMEOUT)
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setSoTimeout(0); |
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else if (timeout == SynchChannelServer.NO_WAIT_TIMEOUT) |
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setSoTimeout(1); |
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else
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setSoTimeout((int) timeout);
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// FYI: message data is truncated if biger than this buffer.
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final byte data[] = new byte[DEFAULT_BUFFER_SIZE]; |
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final DatagramPacket packet = new DatagramPacket(data, data.length);
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socket.receive(packet); |
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// A FilterPacket is used to provide the UdpDatagramContext via narrow.
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return new UDPFilterPacket(new ByteArrayPacket(data, 0, packet.getLength()), packet); |
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} catch (SocketTimeoutException e) {
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return null; |
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} |
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} |
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private void setSoTimeout(int i) throws SocketException { |
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if (curentSoTimeout != i) {
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socket.setSoTimeout(i); |
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curentSoTimeout = i; |
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} |
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} |
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/**
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* @see org.activeio.Channel#write(org.activeio.channel.Packet)
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*/
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public void write(org.activeio.Packet packet) throws IOException { |
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ByteSequence sequence = packet.asByteSequence(); |
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DatagramContext context = (DatagramContext) packet.narrow(DatagramContext.class);
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if( context!=null ) { |
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socket.send(new DatagramPacket(sequence.getData(),sequence.getOffset(), sequence.getLength(), context.address, context.port.intValue()));
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} else {
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socket.send(new DatagramPacket(sequence.getData(),sequence.getOffset(), sequence.getLength()));
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} |
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} |
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/**
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* @see org.activeio.Channel#flush()
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*/
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public void flush() throws IOException { |
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} |
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/**
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* @see org.activeio.Disposable#dispose()
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*/
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public void dispose() { |
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if (disposed)
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return;
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socket.close(); |
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disposed = true;
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} |
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public void start() throws IOException { |
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} |
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public void stop(long timeout) throws IOException { |
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} |
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public Object narrow(Class target) {
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if( target.isAssignableFrom(getClass()) ) {
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return this; |
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} |
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return null; |
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} |
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public String toString() {
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return "Datagram Connection: "+socket.getLocalSocketAddress()+" -> "+socket.getRemoteSocketAddress(); |
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} |
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} |
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