// ========================================================================
   // Copyright (c) 2004-2009 Mort Bay Consulting Pty. Ltd.
   // ------------------------------------------------------------------------
   // All rights reserved. This program and the accompanying materials
   // are made available under the terms of the Eclipse Public License v1.0
   // and Apache License v2.0 which accompanies this distribution.
   // The Eclipse Public License is available at 
   // http://www.eclipse.org/legal/epl-v10.html
   // The Apache License v2.0 is available at
  // http://www.opensource.org/licenses/apache2.0.php
  // You may elect to redistribute this code under either of these licenses. 
  // ========================================================================
  
  package org.eclipse.jetty.util.log;
  
  import java.security.AccessControlException;
  
  import org.eclipse.jetty.util.DateCache;
  
  /*-----------------------------------------------------------------------*/
  /** StdErr Logging.
   * This implementation of the Logging facade sends all logs to StdErr with minimal formatting.
   * 
   * If the system property "org.eclipse.jetty.util.log.DEBUG" is set, 
   * then debug logs are printed if stderr is being used.
   * <p>
   * For named debuggers, the system property name+".DEBUG" is checked. If it is not not set, then
   * "org.eclipse.jetty.util.log.DEBUG" is used as the default.
   * 
   */
  public class StdErrLog implements Logger
  {    
      private static DateCache _dateCache;
      
      private final static boolean __debug = 
          Boolean.parseBoolean(System.getProperty("org.eclipse.jetty.util.log.DEBUG",System.getProperty("org.eclipse.jetty.util.log.stderr.DEBUG","false")));
      private boolean _debug = __debug;
      private final String _name;
      private boolean _hideStacks=false;
      
      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;
  
          try
          {
              _debug = Boolean.parseBoolean(System.getProperty(name + ".DEBUG",Boolean.toString(__debug)));
          }
          catch (AccessControlException ace)
          {
              _debug = __debug;
          }
      }
      
      public String getName()
      {
          return _name;
      }
      
      public boolean isDebugEnabled()
      {
          return _debug;
      }
      
      public void setDebugEnabled(boolean enabled)
      {
          _debug=enabled;
      }
      
      public boolean isHideStacks()
      {
          return _hideStacks;
      }
  
      public void setHideStacks(boolean hideStacks)
      {
          _hideStacks = hideStacks;
      }
  
      public void info(String msg)
      {
         String d=_dateCache.now();
         int ms=_dateCache.lastMs();
         System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":INFO:"+_name+":"+msg);
     }
 
     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+":INFO:"+_name+":"+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+":DBUG:"+_name+":"+msg);
             if (th!=null) 
             {
                 if (_hideStacks)
                     System.err.println(th);
                 else
                     th.printStackTrace();
             }
         }
     }
     
     public void debug(String msg)
     {
         if (_debug)
         {
             String d=_dateCache.now();
             int ms=_dateCache.lastMs();
             System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":DBUG:"+_name+":"+msg);
         }
     }
     
     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+":DBUG:"+_name+":"+format(msg,arg0,arg1));
         }
     }
     
     public void warn(String msg)
     {
         String d=_dateCache.now();
         int ms=_dateCache.lastMs();
         System.err.println(d+(ms>99?".":(ms>0?".0":".00"))+ms+":WARN:"+_name+":"+msg);
     }
     
     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+":WARN:"+_name+":"+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+":WARN:"+_name+":"+msg);
         if (th!=null) 
         {
             if (_hideStacks)
                 System.err.println(th);
             else
                 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==null||_name.length()==0?name:_name+"."+name);
     }
     
     @Override
     public String toString()
     {
         return "StdErrLog:"+_name+":DEBUG="+_debug;
     }
 
 }