logmanager.java

Tomcat 4.1与WebServer集成组件的源代码包.

/*
 * ====================================================================
 * 
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 *    permission, please contact [e-mail].
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 * 5. Products derived from this software may not be called "Apache"
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */ 
package org.apache.tomcat.util.log;

import java.io.*;
import java.lang.reflect.*;
import java.util.*;


/**
 * Allows the control the log properties at runtime.
 * Normal applications will just use Log, without having to
 * deal with the way the log is configured or managed.
 *
 *
 * @author Alex Chaffee [[e-mail]]
 * @author Costin Manolache
 **/
public class LogManager {

    //static LogHandler defaultChannel=new LogHandler();
    static LogHandler defaultChannel=new CommonLogHandler();
    
    protected Hashtable loggers=new Hashtable();
    protected Hashtable channels=new Hashtable();

    public  Hashtable getLoggers() {
	return loggers;
    }

    public Hashtable getChannels() {
	return channels;
    }
    
    public static void setDefault( LogHandler l ) {
	if( defaultChannel==null)
	    defaultChannel=l;
    }

    public void addChannel( String name, LogHandler logH ) {
	if(name==null) name="";

	channels.put( name, logH );
	Enumeration enum=loggers.keys();
	while( enum.hasMoreElements() ) {
	    String k=(String)enum.nextElement();
	    Log l=(Log)loggers.get( k );
	    if( name.equals( l.getChannel( this ) )) {
		l.setProxy( this, logH );
	    }
	}
    }
    
    /** Default method to create a log facade.
     */
    public Log getLog( String channel, String prefix,
		       Object owner ) {
	if( prefix==null && owner!=null ) {
	    String cname = owner.getClass().getName();
	    prefix = cname.substring( cname.lastIndexOf(".") +1);
	}

	LogHandler proxy=(LogHandler)channels.get(channel);
	if( proxy==null ) proxy=defaultChannel;
	
	// user-level loggers
	Log log=new Log( channel, prefix, proxy, owner );
	loggers.put( channel + ":" + prefix, log );
	if( dL > 0 )
	    System.out.println("getLog facade " + channel + ":" + prefix);
	return log;
    }

    private static int dL=0;

}