org.jboss.test.syslog.TCPSyslogSocketHandler.java Source code

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Here is the source code for org.jboss.test.syslog.TCPSyslogSocketHandler.java

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2013, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.test.syslog;

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.Set;

import org.apache.commons.io.IOUtils;
import org.productivity.java.syslog4j.server.SyslogServerEventIF;
import org.productivity.java.syslog4j.server.SyslogServerIF;

/**
 * Socket handler for TCP and TLS syslog server implementations. It handles
 * automatically Octet Counting/Non-Transparent-Framing switch.
 *
 * @author Josef Cacek
 */
public class TCPSyslogSocketHandler implements Runnable {

    protected SyslogServerIF server = null;
    protected Socket socket = null;
    protected Set<Socket> sockets = null;

    /**
     * Constructor.
     *
     * @param sockets
     *            Set of all registered handlers.
     * @param server
     *            Syslog server instance
     * @param socket
     *            socket returned from the serverSocket.accept()
     */
    public TCPSyslogSocketHandler(Set<Socket> sockets, SyslogServerIF server, Socket socket) {
        this.sockets = sockets;
        this.server = server;
        this.socket = socket;

        synchronized (this.sockets) {
            this.sockets.add(this.socket);
        }
    }

    public void run() {
        try {
            final BufferedInputStream bis = new BufferedInputStream(socket.getInputStream());
            int b = -1;
            final ByteArrayOutputStream baos = new ByteArrayOutputStream();
            boolean firstByte = true;
            boolean octetCounting = false;
            StringBuilder octetLenStr = new StringBuilder();
            do {
                b = bis.read();
                if (firstByte && b >= '1' && b <= '9') {
                    // handle Octet Counting messages (cf. rfc-6587)
                    octetCounting = true;
                }
                firstByte = false;
                if (octetCounting) {
                    if (b != ' ') {
                        octetLenStr.append((char) b);
                    } else {
                        int len = Integer.parseInt(octetLenStr.toString());
                        handleSyslogMessage(IOUtils.toByteArray(bis, len));
                        // reset the stuff
                        octetLenStr = new StringBuilder();
                        firstByte = true;
                        octetCounting = false;
                    }
                } else {
                    // handle Non-Transparent-Framing messages (cf. rfc-6587)
                    switch (b) {
                    case -1:
                    case '\r':
                    case '\n':
                        if (baos.size() > 0) {
                            handleSyslogMessage(baos.toByteArray());
                            baos.reset();
                            firstByte = true;
                        }
                        break;
                    default:
                        baos.write(b);
                        break;
                    }
                }
            } while (b != -1);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(socket);
            sockets.remove(socket);
        }
    }

    /**
     * Parses {@link Rfc5424SyslogEvent} instance from given raw message bytes
     * and sends it to event handlers.
     *
     * @param rawMsg
     */
    private void handleSyslogMessage(final byte[] rawMsg) {
        final SyslogServerEventIF event = new Rfc5424SyslogEvent(rawMsg, 0, rawMsg.length);
        System.out.println(">>> Syslog message came: " + event);
    }
}