/*
 * 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.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);
  }


}