com.moss.posixfifosockets.impl.HandlerThread.java Source code

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Here is the source code for com.moss.posixfifosockets.impl.HandlerThread.java

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/**
 * Copyright (C) 2013, Moss Computing Inc.
 *
 * This file is part of posix-fifo-sockets.
 *
 * posix-fifo-sockets is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * posix-fifo-sockets is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with posix-fifo-sockets; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 *
 * Linking this library statically or dynamically with other modules is
 * making a combined work based on this library.  Thus, the terms and
 * conditions of the GNU General Public License cover the whole
 * combination.
 *
 * As a special exception, the copyright holders of this library give you
 * permission to link this library with independent modules to produce an
 * executable, regardless of the license terms of these independent
 * modules, and to copy and distribute the resulting executable under
 * terms of your choice, provided that you also meet, for each linked
 * independent module, the terms and conditions of the license of that
 * module.  An independent module is a module which is not derived from
 * or based on this library.  If you modify this library, you may extend
 * this exception to your version of the library, but you are not
 * obligated to do so.  If you do not wish to do so, delete this
 * exception statement from your version.
 */
package com.moss.posixfifosockets.impl;

import java.io.File;
import java.io.FileWriter;
import java.io.Writer;

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

import com.moss.posixfifosockets.PosixFifoSocket;
import com.moss.posixfifosockets.PosixFifoSocketHandler;

public class HandlerThread extends Thread {
    private final Log log = LogFactory.getLog(getClass());
    private final File socketsDirectory;
    private final long id;
    private final PosixFifoSocketHandler handler;
    private final SocketServerDebugHistory debug;

    Throwable e;

    public HandlerThread(long id, File socketsDirectory, PosixFifoSocketHandler handler,
            SocketServerDebugHistory debug) {
        super("SocketHandler" + id);
        this.id = id;
        this.socketsDirectory = socketsDirectory;
        this.handler = handler;
        this.debug = debug;
    }

    public void run() {
        try {
            File in = new File(socketsDirectory, id + ".fifo.in");
            File out = new File(socketsDirectory, id + ".fifo.out");
            File control = new File(socketsDirectory, id + ".fifo.control");

            PosixFifoSocket.createFifo(in);

            {// LET THE CLIENT KNOW THAT THE CONNECTION HAS BEEN ESTABLISHED
                if (!out.exists()) {
                    throw new RuntimeException(
                            "ERROR: FILE SHOULD HAVE BEEEN CREATED BY SOCKET CLIENT: " + out.getAbsolutePath());
                }
                if (!control.exists()) {
                    throw new RuntimeException(
                            "ERROR: FILE SHOULD HAVE BEEEN CREATED BY SOCKET CLIENT: " + out.getAbsolutePath());
                }
                Writer w = new FileWriter(control);
                w.write("OK\n");
                w.close();
            }

            PosixFifoSocket socket = new PosixFifoSocket(id, in, out);

            if (log.isDebugEnabled())
                log.debug("Opened socket " + socket);
            handler.handle(socket);
            socket.close();

        } catch (Throwable e) {
            this.e = e;
            log.error("Error creating socket: " + e.getMessage(), e);
        } finally {
            if (debug != null) {
                debug.wentInactive(this);
            }

            //            handlers.remove(this);
            //            recentHandlers.add(this);
        }
    }

    @Override
    public String toString() {
        return "Handler for socket " + id + " (error : " + e + ")";
    }
}