001/*
002 * Copyright (c) 2016 Chris K Wensel <chris@wensel.net>. 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.flow.planner.rule.util;
022
023import cascading.util.LogUtil;
024
025/**
026 *
027 */
028public class RuleLogUtil
029  {
030  private static final String[] CONTEXTS = new String[]
031    {
032      "cascading.flow.Flow",
033      "cascading.flow.planner.rule",
034      "cascading.flow.planner.iso.transformer",
035      "cascading.flow.planner.iso.assertion",
036      "cascading.flow.planner.iso.subgraph",
037      "cascading.flow.planner.iso.finder"
038    };
039
040  public static String[] enableDebugLogging()
041    {
042    return LogUtil.setLog4jLevel( CONTEXTS, "DEBUG" );
043    }
044
045  public static String[] enableTraceLogging()
046    {
047    return LogUtil.setLog4jLevel( CONTEXTS, "TRACE" );
048    }
049
050  public static String[] enableLogging( LogLevel level )
051    {
052    if( level == null )
053      return null;
054
055    return LogUtil.setLog4jLevel( CONTEXTS, level.toString() );
056    }
057
058  public static void restoreLogging( String[] levels )
059    {
060    if( levels != null )
061      LogUtil.setLog4jLevel( CONTEXTS, levels );
062    }
063  }