    001/*
    002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.util;
    022
    023/**
    024 *
    025 */
    026public interface ProcessLogger
    027  {
    028  ProcessLogger NULL = new ProcessLogger()
    029  {
    030  @Override
    031  public boolean isInfoEnabled()
    032    {
    033    return false;
    034    }
    035
    036  @Override
    037  public boolean isDebugEnabled()
    038    {
    039    return false;
    040    }
    041
    042  @Override
    043  public void logInfo( String message, Object... arguments )
    044    {
    045
    046    }
    047
    048  @Override
    049  public void logDebug( String message, Object... arguments )
    050    {
    051
    052    }
    053
    054  @Override
    055  public void logWarn( String message )
    056    {
    057
    058    }
    059
    060  @Override
    061  public void logWarn( String message, Object... arguments )
    062    {
    063
    064    }
    065
    066  @Override
    067  public void logWarn( String message, Throwable throwable )
    068    {
    069
    070    }
    071
    072  @Override
    073  public void logError( String message, Object... arguments )
    074    {
    075
    076    }
    077
    078  @Override
    079  public void logError( String message, Throwable throwable )
    080    {
    081
    082    }
    083  };
    084
    085  boolean isInfoEnabled();
    086
    087  boolean isDebugEnabled();
    088
    089  void logInfo( String message, Object... arguments );
    090
    091  void logDebug( String message, Object... arguments );
    092
    093  void logWarn( String message );
    094
    095  void logWarn( String message, Object... arguments );
    096
    097  void logWarn( String message, Throwable throwable );
    098
    099  void logError( String message, Object... arguments );
    100
    101  void logError( String message, Throwable throwable );
    102  }