2009/05/20 - Apache Shale has been retired.

   /*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to you 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.apache.shale.remoting.logger;
  
  /***
   * <p>Adapter to logging systems that intends to make Commons Logging
   * optional on deployments running on JDK 1.4 or later.</p>
   */
  public interface Logger {
      
  
      // ------------------------------------------------------ Condition Checking
  
  
      /***
       * <p>Is trace level debugging enabled on the specified logger?</p>
       *
       * @param name Name of the logger to check
       */
      public boolean isTraceEnabled(String name);
  
  
      /***
       * <p>Is debug level debugging enabled on the specified logger?</p>
       *
       * @param name Name of the logger to check
       */
      public boolean isDebugEnabled(String name);
  
  
      /***
       * <p>Is info level debugging enabled on the specified logger?</p>
       *
       * @param name Name of the logger to check
       */
      public boolean isInfoEnabled(String name);
  
  
      /***
       * <p>Is warning level debugging enabled on the specified logger?</p>
       *
       * @param name Name of the logger to check
       */
      public boolean isWarnEnabled(String name);
  
  
      /***
       * <p>Is error level debugging enabled on the specified logger?</p>
       *
       * @param name Name of the logger to check
       */
      public boolean isErrorEnabled(String name);
  
  
      /***
       * <p>Is fatal level debugging enabled on the specified logger?</p>
       *
       * @param name Name of the logger to check
       */
      public boolean isFatalEnabled(String name);
  
  
      // ------------------------------------------------------------- Log Methods
  
  
      /***
       * <p>Log a message at trace severity.</p>
       *
       * @param name Name of the logger to use
       * @param message Text message to record (treated as a message format if
       *  the <code>params</code> argument is not null)
       * @param exception Exception to report, or <code>null</code> for none
       * @param params Message4 format replacement parameters, or
       *  <code>null</code> for none
       */
      public void trace(String name, String message,
                        Throwable exception, Object[] params);
  
  
      /***
       * <p>Log a message at debug severity.</p>
       *
       * @param name Name of the logger to use
       * @param message Text message to record (treated as a message format if
      *  the <code>params</code> argument is not null)
      * @param exception Exception to report, or <code>null</code> for none
      * @param params Message4 format replacement parameters, or
      *  <code>null</code> for none
      */
     public void debug(String name, String message,
                       Throwable exception, Object[] params);
 
 
     /***
      * <p>Log a message at info severity.</p>
      *
      * @param name Name of the logger to use
      * @param message Text message to record (treated as a message format if
      *  the <code>params</code> argument is not null)
      * @param exception Exception to report, or <code>null</code> for none
      * @param params Message4 format replacement parameters, or
      *  <code>null</code> for none
      */
     public void info(String name, String message,
                      Throwable exception, Object[] params);
 
 
     /***
      * <p>Log a message at warning severity.</p>
      *
      * @param name Name of the logger to use
      * @param message Text message to record (treated as a message format if
      *  the <code>params</code> argument is not null)
      * @param exception Exception to report, or <code>null</code> for none
      * @param params Message4 format replacement parameters, or
      *  <code>null</code> for none
      */
     public void warn(String name, String message,
                      Throwable exception, Object[] params);
 
 
     /***
      * <p>Log a message at error severity.</p>
      *
      * @param name Name of the logger to use
      * @param message Text message to record (treated as a message format if
      *  the <code>params</code> argument is not null)
      * @param exception Exception to report, or <code>null</code> for none
      * @param params Message4 format replacement parameters, or
      *  <code>null</code> for none
      */
     public void error(String name, String message,
                       Throwable exception, Object[] params);
 
 
     /***
      * <p>Log a message at fatal severity.</p>
      *
      * @param name Name of the logger to use
      * @param message Text message to record (treated as a message format if
      *  the <code>params</code> argument is not null)
      * @param exception Exception to report, or <code>null</code> for none
      * @param params Message4 format replacement parameters, or
      *  <code>null</code> for none
      */
     public void fatal(String name, String message,
                       Throwable exception, Object[] params);
 
 
 }