Glassfish example source code file (SyslogHandler.java)

This example Glassfish source code file (SyslogHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

booleanlatch, hh:mm:ss, interruptedexception, interruptedexception, log, logging, logrecord, logrecord, mmm, simpledateformat, string, string, syslog, syslog, text, thread, threading, threads, warning

The Glassfish SyslogHandler.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.server.logging;

import org.jvnet.hk2.annotations.ContractProvided;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.PostConstruct;
import org.jvnet.hk2.component.PreDestroy;
import org.jvnet.hk2.component.Singleton;

import org.glassfish.server.ServerEnvironmentImpl;
import org.glassfish.config.support.TranslatedConfigView;

import java.util.logging.*;
import java.text.SimpleDateFormat;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ArrayBlockingQueue;

import com.sun.logging.LogDomains;

/**
 * Created by IntelliJ IDEA.
 * User: cmott
 * Date: Mar 11, 2009
 * Time: 1:41:30 PM
 * To change this template use File | Settings | File Templates.
 */
@Service
@Scoped(Singleton.class)
@ContractProvided(java.util.logging.Handler.class)
public class SyslogHandler extends Handler implements PostConstruct, PreDestroy {

    @Inject
    ServerEnvironmentImpl env;

    private Syslog sysLogger;
    private Thread pump= null;
    private BooleanLatch done = new BooleanLatch();
    private BlockingQueue<LogRecord> pendingRecords = new ArrayBlockingQueue(5000);
    
    

    public void postConstruct() {

        LogManager manager = LogManager.getLogManager();
        String cname = getClass().getName();

        String systemLogging = TranslatedConfigView.getTranslatedValue(manager.getProperty(cname + ".useSystemLogging")).toString();
        if (systemLogging.equals("false"))
            return;

        //set up the connection
        try {
            sysLogger = new Syslog("localhost");  //for now only write to this host
        } catch ( java.net.UnknownHostException e) {
		   Logger.getAnonymousLogger().log(Level.SEVERE,"unknown host" );
		   return;
		}
        
        // start the Queue consummer thread.
        pump = new Thread() {
            public void run() {
                try {
                    while (!done.isSignalled()) {
                        log();
                    }
                } catch (RuntimeException e) {

                }
            }
        };
        pump.start();

    }
    public void preDestroy() {
        LogDomains.getLogger(ServerEnvironmentImpl.class, LogDomains.ADMIN_LOGGER).fine("SysLog Logger handler killed");
    }

    /**
     * Retrieves the LogRecord from our Queue and store them in the file
     *
     */
    public void log() {

        LogRecord record;

        try {
            record = pendingRecords.take();
        } catch (InterruptedException e) {
            return;
        }
        Level level= record.getLevel();
        long millisec = record.getMillis();
        int l;
        String slLvl;

        if (level.equals(Level.SEVERE)) {
            l = Syslog.CRIT;
            slLvl = "CRIT";
        }else if (level.equals(Level.WARNING)){
            l = Syslog.WARNING;
            slLvl = "WARNING";
        }else if (level.equals(Level.INFO)) {
            l = Syslog.INFO;
            slLvl = "INFO";
        }else   {
            l = Syslog.DEBUG;
            slLvl = "DEBUG";
        }
        
        //format the message
        String msg;
        SimpleDateFormat formatter = new SimpleDateFormat("MMM dd HH:mm:ss");
        msg = formatter.format(millisec);
        msg = msg +" [ " + slLvl +" glassfish ] " +record.getMessage();

         //send message
        sysLogger.log(Syslog.DAEMON, Syslog.WARNING, msg);

    }

    /**
     * Publishes the logrecord storing it in our queue
     */
    public void publish( LogRecord record ) {
        if (pump == null)
            return;
            
        try {
            pendingRecords.add(record);
        } catch(IllegalStateException e) {
            // queue is full, start waiting.
            try {
                pendingRecords.put(record);
            } catch (InterruptedException e1) {
                // to bad, record is lost...
            }
        }
    }

    public void close() {

    }

    public void flush() {
        
    }
}