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
038  @Override
039  public void activateOptions() {
040    synchronized (this) {
041      setFile(new File(this.containerLogDir, "syslog").toString());
042      setAppend(true);
043      super.activateOptions();
044    }
045  }
046
047  @Override
048  public void flush() {
049    if (qw != null) {
050      qw.flush();
051    }
052  }
053
054  /**
055   * Getter/Setter methods for log4j.
056   */
057
058  public String getContainerLogDir() {
059    return this.containerLogDir;
060  }
061
062  public void setContainerLogDir(String containerLogDir) {
063    this.containerLogDir = containerLogDir;
064  }
065}