    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  }