Jetty example source code file (StdErrLog.java)

This example Jetty source code file (StdErrLog.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 - Jetty tags/keywords

datecache, datecache, debug, hh:mm:ss, logger, object, object, stderr, stderrlog, stderrlog, string, string, throwable

The Jetty StdErrLog.java source code

// ========================================================================
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at 
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================

package org.mortbay.log;

import org.mortbay.util.DateCache;

/*-----------------------------------------------------------------------*/
/** StdErr Logging.
 * This implementation of the Logging facade sends all logs to StdErr with minimal formatting.
 * 
 * If the system property DEBUG is set, then debug logs are printed if stderr is being used.
 * 
 */
public class StdErrLog implements Logger
{    
    private static DateCache _dateCache;
    private static boolean debug = System.getProperty("DEBUG",null)!=null;
    private String name;
    
    static
    {
        try
        {
            _dateCache=new DateCache("yyyy-MM-dd HH:mm:ss");
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        
    }
    
    public StdErrLog()
    {
        this(null);
    }
    
    public StdErrLog(String name)
    {    
        this.name=name==null?"":name;
    }
    
    public boolean isDebugEnabled()
    {
        return debug;
    }
    
    public void setDebugEnabled(boolean enabled)
    {
        debug=enabled;
    }
    
    public void info(String msg,Object arg0, Object arg1)
    {
        String d=_dateCache.now();
        int ms=_dateCache.lastMs();
        System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":"+name+":INFO:  "+format(msg,arg0,arg1));
    }
    
    public void debug(String msg,Throwable th)
    {
        if (debug)
        {
            String d=_dateCache.now();
            int ms=_dateCache.lastMs();
            System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":"+name+":DEBUG: "+msg);
            if (th!=null) th.printStackTrace();
        }
    }
    
    public void debug(String msg,Object arg0, Object arg1)
    {
        if (debug)
        {
            String d=_dateCache.now();
            int ms=_dateCache.lastMs();
            System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":"+name+":DEBUG: "+format(msg,arg0,arg1));
        }
    }
    
    public void warn(String msg,Object arg0, Object arg1)
    {
        String d=_dateCache.now();
        int ms=_dateCache.lastMs();
        System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":"+name+":WARN:  "+format(msg,arg0,arg1));
    }
    
    public void warn(String msg, Throwable th)
    {
        String d=_dateCache.now();
        int ms=_dateCache.lastMs();
        System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":"+name+":WARN:  "+msg);
        if (th!=null)
            th.printStackTrace();
    }

    private String format(String msg, Object arg0, Object arg1)
    {
        int i0=msg.indexOf("{}");
        int i1=i0<0?-1:msg.indexOf("{}",i0+2);
        
        if (arg1!=null && i1>=0)
            msg=msg.substring(0,i1)+arg1+msg.substring(i1+2);
        if (arg0!=null && i0>=0)
            msg=msg.substring(0,i0)+arg0+msg.substring(i0+2);
        return msg;
    }
    
    public Logger getLogger(String name)
    {
        if ((name==null && this.name==null) ||
            (name!=null && name.equals(this.name)))
            return this;
        return new StdErrLog(name);
    }
    
    public String toString()
    {
        return "STDERR"+name;
    }

}