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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,
   * 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;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.PrintWriter;
  import org.apache.hadoop.chukwa.Chunk;
  import org.apache.hadoop.chukwa.datacollection.agent.ChukwaAgent;
  import org.apache.hadoop.chukwa.datacollection.connector.ChunkCatcherConnector;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.log4j.Level;
  import org.apache.log4j.Logger;
  import junit.framework.TestCase;
  import static org.apache.hadoop.chukwa.util.TempFileUtil.*;
  
  public class TestFileAdaptor extends TestCase {
  
    Configuration conf = new Configuration();
    static File baseDir;
    File testFile;
    ChunkCatcherConnector chunks;
    
    public TestFileAdaptor() throws IOException {
      baseDir = new File(System.getProperty("test.build.data", "/tmp"));
      conf.setInt("chukwaAgent.control.port", 0);
      conf.set("chukwaAgent.checkpoint.dir", baseDir.getCanonicalPath());
      conf.setBoolean("chukwaAgent.checkpoint.enabled", false);
      conf.setInt("chukwaAgent.adaptor.fileadaptor.timeoutperiod", 100);
      conf.setInt("chukwaAgent.adaptor.context.switch.time", 100);
      testFile = makeTestFile("test", 10, baseDir);
  
      chunks = new ChunkCatcherConnector();
      chunks.start();
    }
    
    
    public void testOnce()  throws IOException,
    ChukwaAgent.AlreadyRunningException, InterruptedException {
      
      ChukwaAgent agent = new ChukwaAgent(conf);
      
      assertEquals(0, agent.adaptorCount());
  
      String name =agent.processAddCommand("add test = FileAdaptor raw " +testFile.getCanonicalPath() + " 0");
      assertEquals(1, agent.adaptorCount());
      assertEquals(name, "adaptor_test");
      Chunk c = chunks.waitForAChunk(5000);
      assertNotNull(c);
      String dat = new String(c.getData());
      assertTrue(dat.startsWith("0 abcdefghijklmnopqrstuvwxyz"));
      assertTrue(dat.endsWith("9 abcdefghijklmnopqrstuvwxyz\n"));
      assertTrue(c.getDataType().equals("raw"));
      agent.shutdown();
    }
    
    public void testRepeatedly() throws IOException,
    ChukwaAgent.AlreadyRunningException, InterruptedException {
      int tests = 10; //SHOULD SET HIGHER AND WATCH WITH lsof to find leaks
  
      ChukwaAgent agent = new ChukwaAgent(conf);
      for(int i=0; i < tests; ++i) {
        if(i % 100 == 0)
          System.out.println("buzzed " + i + " times");
        
        assertEquals(0, agent.adaptorCount());
        String name = agent.processAddCommand("add test = FileAdaptor raw " +testFile.getCanonicalPath() + " 0");
        assertEquals(1, agent.adaptorCount());
        assertEquals(name, "adaptor_test");
        Chunk c = chunks.waitForAChunk(5000);
        assertNotNull(c);
        String dat = new String(c.getData());
        assertTrue(dat.startsWith("0 abcdefghijklmnopqrstuvwxyz"));
        assertTrue(dat.endsWith("9 abcdefghijklmnopqrstuvwxyz\n"));
        assertTrue(c.getDataType().equals("raw"));
        while(agent.adaptorCount() > 0) {
          agent.stopAdaptor("adaptor_test", false);
          Thread.sleep(1000);
        }
      }
      agent.shutdown();
    }
   
 }