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/*-*- mode: Java; tab-width:8 -*-*/

/*
 * Copyright (C) 2003-2007 Jost Boekemeier
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

package io.soluble.pjb.bridge;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.net.Socket;


/**
 * A logger class which connects to chainsaw -- chainsaw is a log4j viewer. Requires that log4j.jar is in the classpath.
 * 
 * Start chainsaw, for example by clicking on Applications ->
 * Programming -> Chainsaw or via:
java -classpath
 * /usr/share/java/log4j.jar org.apache.log4j.chainsaw.Main
 * and then start the PHP/Java Bridge:

 * java -classpath /usr/share/java/log4j.jar:/usr/share/java/JavaBridge.jar io.soluble.pjb.bridge.JavaBridge
 * or set the PHP .ini option [email protected]:4445.
 */
public class ChainsawLogger extends SimpleLog4jLogger implements ILogger {
    /**
     * The default chainsaw port
     */
    public static final int DEFAULT_PORT = 4445;
    /**
     * The default chainsaw port
     */
    public static final String DEFAULT_PORT_NAME = String.valueOf(DEFAULT_PORT);
    /**
     * The default cainsaw host
     */
    public static final String DEFAULT_HOST = "127.0.0.1";

    /**
     * Eg: java -Dchainsaw.port=14445 ...
     */
    private int configuredPort;

    /**
     * override this method, if you want to connect to a different
     * host or port
     *
     * @param defaultHost    The default host
     * @param configuredPort The default port
     * @throws Exception If chainsaw isn't running.
     */
    public void configure(String defaultHost, int configuredPort) throws Exception {
        this.configuredPort = configuredPort;
        Socket s = new Socket(defaultHost, configuredPort);
        s.close();
        Class clazz = Class.forName("org.apache.log4j.net.SocketAppender");
        Constructor constructor = clazz.getConstructor(new Class[]{String.class, int.class});
        Object socketAppender = constructor.newInstance(new Object[]{defaultHost, new Integer(configuredPort)});
        clazz = Class.forName("org.apache.log4j.BasicConfigurator");
        Method method = clazz.getMethod("resetConfiguration", Util.ZERO_PARAM);
        method.invoke(clazz, Util.ZERO_ARG);
        Class appender = Class.forName("org.apache.log4j.Appender");
        method = clazz.getMethod("configure", new Class[]{appender});
        method.invoke(clazz, new Object[]{socketAppender});
    }

    protected void init() throws Exception {
        configure(DEFAULT_HOST, Integer.parseInt(System.getProperty("chainsaw.port", DEFAULT_PORT_NAME)));
        logger = new LoggerProxy();
    }

    /**
     * Create a new chainsaw logger.
     *
     * @see io.soluble.pjb.bridge.Util#setDefaultLogger(ILogger)
     */
    protected ChainsawLogger() {
        super();
    }

    /**
     * Create a new chainsaw logger.
     *
     * @return The chainsaw logger
     * @throws Exception If chainsaw isn't running.
     * @see io.soluble.pjb.bridge.Util#setDefaultLogger(ILogger)
     */
    public static ChainsawLogger createChainsawLogger() throws Exception {
        ChainsawLogger logger = new ChainsawLogger();
        logger.init();
        return logger;
    }

    /**
     * {@inheritDoc}
     */
    public String toString() {
        return "Chainsaw logger, host: " + DEFAULT_HOST + ", port: " + configuredPort;
    }
}