001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.yarn;
020
021import org.apache.hadoop.classification.InterfaceAudience.Public;
022import org.apache.hadoop.classification.InterfaceStability.Unstable;
023import org.apache.log4j.RollingFileAppender;
024
025import java.io.File;
026import java.io.Flushable;
027
028/**
029 * A simple log4j-appender for container's logs.
030 *
031 */
032@Public
033@Unstable
034public class ContainerRollingLogAppender extends RollingFileAppender
035  implements Flushable {
036  private String containerLogDir;
037  private String containerLogFile;
038
039  @Override
040  public void activateOptions() {
041    synchronized (this) {
042      setFile(new File(this.containerLogDir, containerLogFile).toString());
043      setAppend(true);
044      super.activateOptions();
045    }
046  }
047
048  @Override
049  public void flush() {
050    if (qw != null) {
051      qw.flush();
052    }
053  }
054
055  /**
056   * Getter/Setter methods for log4j.
057   */
058
059  public String getContainerLogDir() {
060    return this.containerLogDir;
061  }
062
063  public void setContainerLogDir(String containerLogDir) {
064    this.containerLogDir = containerLogDir;
065  }
066
067  public String getContainerLogFile() {
068    return containerLogFile;
069  }
070
071  public void setContainerLogFile(String containerLogFile) {
072    this.containerLogFile = containerLogFile;
073  }
074}