| /** |
| * 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.crunch.test; |
| |
| import org.apache.log4j.Appender; |
| import org.apache.log4j.ConsoleAppender; |
| import org.apache.log4j.Level; |
| import org.apache.log4j.LogManager; |
| import org.apache.log4j.Logger; |
| import org.apache.log4j.PatternLayout; |
| |
| /** |
| * Allows direct manipulation of the Hadoop log4j settings to aid in |
| * unit testing. Not recommended for production use. |
| */ |
| public final class DebugLogging { |
| |
| /** |
| * Enables logging Hadoop output to the console using the pattern |
| * '%-4r [%t] %-5p %c %x - %m%n' at the specified {@code Level}. |
| * |
| * @param level The log4j level |
| */ |
| public static void enable(Level level) { |
| enable(level, new ConsoleAppender(new PatternLayout("%-4r [%t] %-5p %c %x - %m%n"))); |
| } |
| |
| /** |
| * Enables logging to the given {@code Appender} at the specified {@code Level}. |
| * |
| * @param level The log4j level |
| * @param appender The log4j appender |
| */ |
| public static void enable(Level level, Appender appender) { |
| Logger hadoopLogger = LogManager.getLogger("org.apache.hadoop"); |
| hadoopLogger.setLevel(level); |
| hadoopLogger.addAppender(appender); |
| } |
| |
| private DebugLogging() { } |
| } |