com.googlecode.jcimd.DummyCimdServer.java Source code

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Here is the source code for com.googlecode.jcimd.DummyCimdServer.java

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/*
 * Copyright 2010-2011 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
 * 
 *    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 com.googlecode.jcimd;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.googlecode.jcimd.Packet;
import com.googlecode.jcimd.PacketSerializer;
import com.googlecode.jcimd.Parameter;

public class DummyCimdServer {
    private final Log logger = LogFactory.getLog(this.getClass());

    private int port;
    private ServerSocket serverSocket;
    private Thread thread;
    private PacketSerializer serializer;
    private List<Packet> receivedCommands;

    public DummyCimdServer(int port) {
        this.port = port;
        this.serializer = new PacketSerializer("DummyCimdServer");
        this.receivedCommands = new LinkedList<Packet>();
    }

    public void start() throws IOException {
        this.serverSocket = new ServerSocket(this.port);
        if (this.logger.isInfoEnabled()) {
            this.logger.info("Listening on port " + this.port);
        }
        Runnable listener = new Runnable() {
            @Override
            public void run() {
                try {
                    while (!Thread.currentThread().isInterrupted()) {
                        try {
                            Socket socket = serverSocket.accept();
                            socket.setSoTimeout(2000);
                            if (logger.isInfoEnabled()) {
                                logger.info("Starting session with " + socket.getInetAddress().getHostAddress()
                                        + ":" + socket.hashCode());
                            }
                            DummyCimdServer.Session session = new Session(socket);
                            //List<Session> sessions = ...;
                            //sessions.add(session);
                            new Thread(session).start();
                        } catch (SocketException e) {
                            // Ignore, as this was due to #stop
                        }
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        };
        this.thread = new Thread(listener, this.getClass().getName() + "-listener");
        this.thread.start();
    }

    public void stop() throws IOException {
        if (this.thread != null) {
            this.thread.interrupt();
        }
        if (this.serverSocket != null) {
            this.serverSocket.close();
        }
    }

    class Session implements Runnable {
        private Socket socket;
        private InputStream inputStream;
        private OutputStream outputStream;

        public Session(Socket socket) throws IOException {
            this.socket = socket;
            this.inputStream = socket.getInputStream();
            this.outputStream = socket.getOutputStream();
        }

        @Override
        public void run() {
            try {
                while (!Thread.currentThread().isInterrupted() && this.socket.isConnected()
                        && !this.socket.isClosed()) {
                    Packet request = null;
                    try {
                        if (logger.isInfoEnabled()) {
                            logger.info("Waiting for requests...");
                        }
                        request = serializer.deserialize(this.inputStream);
                    } catch (Exception e) {
                        if (logger.isErrorEnabled()) {
                            logger.error(e);
                        }
                        break;
                    }
                    receivedCommands.add(request);
                    Packet response;
                    switch (request.getOperationCode()) {
                    // The operation code of the response packet is
                    // fixed to be 50 more than the operation code of 
                    // the request packet. The packet number is the
                    // same as the request message.
                    case Packet.OP_LOGIN:
                    case Packet.OP_LOGOUT:
                    case Packet.OP_ALIVE:
                        response = new Packet(request.getOperationCode() + 50, request.getSequenceNumber());
                        break;
                    case Packet.OP_SUBMIT_MESSAGE:
                        response = new Packet(request.getOperationCode() + 50, request.getSequenceNumber(),
                                new Parameter(60, new SimpleDateFormat("yyMMddHHmmss").format(new Date())));
                        break;
                    default:
                        response = new Packet(Packet.OP_GENERAL_ERROR_RESPONSE);
                        break;
                    }
                    serializer.serialize(response, this.outputStream);
                    if (request.getOperationCode() == Packet.OP_LOGOUT) {
                        break;
                    }
                }
                if (logger.isInfoEnabled()) {
                    // close this session
                    logger.info("Ending session with " + socket.getInetAddress().getHostAddress() + ":"
                            + socket.hashCode());
                }
            } catch (Exception e) {
                throw new RuntimeException(e);
            } finally {
                try {
                    this.inputStream.close();
                } catch (IOException e2) {
                    System.out.println(e2.getMessage());
                }
                try {
                    this.outputStream.close();
                } catch (IOException e2) {
                    System.out.println(e2.getMessage());
                }
            }
        }
    }

    public List<Packet> getReceivedCommands() {
        return receivedCommands;
    }

}