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   * 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,
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   * See the License for the specific language governing permissions and
   * limitations under the License.
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  package org.apache.hadoop.chukwa.datacollection.adaptor.filetailer;
  
  
  import java.io.*;
  import junit.framework.TestCase;
  import org.apache.hadoop.chukwa.conf.ChukwaConfiguration;
  import java.util.Map;
  import java.util.Iterator;
  import org.apache.hadoop.chukwa.Chunk;
  import org.apache.hadoop.chukwa.datacollection.adaptor.*;
  import org.apache.hadoop.chukwa.datacollection.agent.ChukwaAgent;
  import org.apache.hadoop.chukwa.datacollection.controller.ChukwaAgentController;
  import org.apache.hadoop.chukwa.datacollection.connector.ChunkCatcherConnector;
  import static org.apache.hadoop.chukwa.util.TempFileUtil.*;
  
  public class TestLogRotate extends TestCase {
    ChunkCatcherConnector chunks;
  
    public TestLogRotate() {
      chunks = new ChunkCatcherConnector();
      chunks.start();
    }
  
    public void testLogRotate() throws IOException, InterruptedException,
        ChukwaAgent.AlreadyRunningException {
      ChukwaAgent agent = ChukwaAgent.getAgent();
      agent.start();
      // Remove any adaptor left over from previous run
      ChukwaConfiguration cc = new ChukwaConfiguration();
      int portno = cc.getInt("chukwaAgent.control.port", 9093);
      ChukwaAgentController cli = new ChukwaAgentController("localhost", portno);
      cli.removeAll();
      // sleep for some time to make sure we don't get chunk from existing streams
      Thread.sleep(5000);
      File testFile = makeTestFile("chukwaLogRotateTest", 80);
      String adaptorId = agent
          .processAddCommand("add lr =org.apache.hadoop.chukwa.datacollection.adaptor.filetailer.CharFileTailingAdaptorUTF8"
              + " lines " + testFile + " 0");
      assertTrue(adaptorId.equals("adaptor_lr"));
      System.out.println("getting a chunk...");
      Chunk c = chunks.waitForAChunk();
      System.out.println("got chunk");
      while (!c.getDataType().equals("lines")) {
        c = chunks.waitForAChunk();
      }
      assertTrue(c.getSeqID() == testFile.length());
      assertTrue(c.getRecordOffsets().length == 80);
      int recStart = 0;
      for (int rec = 0; rec < c.getRecordOffsets().length; ++rec) {
        String record = new String(c.getData(), recStart,
            c.getRecordOffsets()[rec] - recStart + 1);
        System.out.println("record " + rec + " was: " + record);
        assertTrue(record.equals(rec + " abcdefghijklmnopqrstuvwxyz\n"));
        recStart = c.getRecordOffsets()[rec] + 1;
      }
      assertTrue(c.getDataType().equals("lines"));
      testFile = makeTestFile("chukwaLogRotateTest", 40);
      c = chunks.waitForAChunk();
      System.out.println("got chunk");
      while (!c.getDataType().equals("lines")) {
        c = chunks.waitForAChunk();
      }
      // assertTrue(c.getSeqID() == testFile.length());
      assertTrue(c.getRecordOffsets().length == 40);
      recStart = 0;
      for (int rec = 0; rec < c.getRecordOffsets().length; ++rec) {
        String record = new String(c.getData(), recStart,
            c.getRecordOffsets()[rec] - recStart + 1);
        System.out.println("record " + rec + " was: " + record);
        assertTrue(record.equals(rec + " abcdefghijklmnopqrstuvwxyz\n"));
        recStart = c.getRecordOffsets()[rec] + 1;
      }
      assertTrue(c.getDataType().equals("lines"));
      agent.stopAdaptor(adaptorId, false);
      agent.shutdown();
      Thread.sleep(2000);
    }
  
  
  }
  