package org.apache.helix.tools;
   
   /*
    * 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.
   */
  
  import java.io.File;
  import java.io.IOException;
  import java.lang.management.ManagementFactory;
  import java.lang.management.RuntimeMXBean;
  import java.text.SimpleDateFormat;
  import java.util.Calendar;
  import java.util.Date;
  import java.util.List;
  
  import org.apache.log4j.FileAppender;
  import org.apache.log4j.Layout;
  import org.apache.log4j.spi.ErrorCode;
  
  public class CLMLogFileAppender extends FileAppender
  {
    public CLMLogFileAppender()
    {
    }
  
    public CLMLogFileAppender(Layout layout, String filename, boolean append,
        boolean bufferedIO, int bufferSize) throws IOException
    {
      super(layout, filename, append, bufferedIO, bufferSize);
    }
  
    public CLMLogFileAppender(Layout layout, String filename, boolean append)
        throws IOException
    {
      super(layout, filename, append);
    }
  
    public CLMLogFileAppender(Layout layout, String filename) throws IOException
    {
      super(layout, filename);
    }
  
    public void activateOptions()
    {
      if (fileName != null)
      {
        try
        {
          fileName = getNewLogFileName();
          setFile(fileName, fileAppend, bufferedIO, bufferSize);
        } catch (Exception e)
        {
          errorHandler.error("Error while activating log options", e,
              ErrorCode.FILE_OPEN_FAILURE);
        }
      }
    }
  
    private String getNewLogFileName()
    {
      Calendar cal = Calendar.getInstance();
      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss-SSS");
      String time = sdf.format(cal.getTime());
  
      StackTraceElement[] stack = Thread.currentThread().getStackTrace();
      StackTraceElement main = stack[stack.length - 1];
      String mainClass = main.getClassName();
  
      return System.getProperty("user.home") + "/EspressoLogs/" + mainClass + "_"
          + time + ".txt";
    }
  }