/*
    * 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.extraction.archive;
  
  import java.io.IOException;
  import java.util.Calendar;
  import org.apache.hadoop.chukwa.ChukwaArchiveKey;
  import org.apache.hadoop.chukwa.ChunkImpl;
  import org.apache.hadoop.chukwa.extraction.CHUKWA_CONSTANT;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.FSDataOutputStream;
  import org.apache.hadoop.fs.FileStatus;
  import org.apache.hadoop.fs.FileSystem;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.hdfs.MiniDFSCluster;
  import org.apache.hadoop.io.SequenceFile;
  import org.apache.hadoop.mapred.*;
  import org.apache.hadoop.util.ToolRunner;
  import junit.framework.TestCase;
  import static org.apache.hadoop.chukwa.util.TempFileUtil.writeASinkFile;
  
  public class TestArchive extends TestCase {
  
    
     public void browseDir(FileSystem fs, Path p, int d) throws IOException {
       for(int i=0; i< d; ++i) {
         System.out.print(" |");
       }
       FileStatus stat = fs.getFileStatus(p);
       if(stat.isDir()) {
         System.out.println(" \\ " + p.getName());
         FileStatus[] files = fs.listStatus(p);
         for(FileStatus f: files) {
           browseDir(fs, f.getPath(), d+1);
         }
       }
       else
         System.out.println( p.getName() );
     }
  
    static final int NUM_HADOOP_SLAVES = 1;
    static final Path DATASINK = new Path("/chukwa/logs/*");
    static final Path DATASINKFILE = new Path("/chukwa/logs/foobar.done");
    static final Path DATASINK_NOTDONE = new Path("/chukwa/logs/foo.chukwa");
    static final Path DEST_FILE = new Path("/chukwa/archive/foocluster/HadoopLogProcessor_2008_05_29.arc");
    static final Path MERGED_DATASINK = new Path("/chukwa/archive/foocluster/HadoopLogProcessor_2008_05_29-0.arc");
    static final Path OUTPUT_DIR = new Path("/chukwa/archive/");
    static final int CHUNKCOUNT = 1000;
    
  
    
    /**
     * Writes a single chunk to a file, checks that archiver delivers it
     * to an archive file with correct filename.
     */
    public void testArchiving() throws Exception {
      FileSystem fileSys;
      MiniMRCluster mr;
      JobConf jc ;
      
      System.out.println("starting archive test");
      Configuration conf = new Configuration();
      
      conf.setInt("io.sort.mb", 1);
      conf.setInt("io.sort.factor", 5);
      conf.setInt("mapred.tasktracker.map.tasks.maximum", 2);
      conf.setInt("mapred.tasktracker.reduce.tasks.maximum", 2);
      conf.set(ChukwaArchiveDataTypeOutputFormat.GROUP_BY_CLUSTER_OPTION_NAME, "true");
      
      System.setProperty("hadoop.log.dir", System.getProperty(
          "test.build.data", "/tmp"));
  
      MiniDFSCluster dfs = new MiniDFSCluster(conf, NUM_HADOOP_SLAVES, true,
          null);
      fileSys = dfs.getFileSystem();
      conf.set("fs.default.name", fileSys.getUri().toString());
      
      System.out.println("filesystem is " + fileSys.getUri());
  
      
      mr = new MiniMRCluster(NUM_HADOOP_SLAVES, fileSys.getUri()
          .toString(), 1);
      jc = mr.createJobConf(new JobConf(conf));
     
 
     fileSys.delete(new Path("/chukwa"), true);//nuke sink
 
     writeASinkFile(jc, fileSys, DATASINKFILE, CHUNKCOUNT);
     
     FileStatus fstat = fileSys.getFileStatus(DATASINKFILE);
     long dataLen = fstat.getLen();
     assertTrue(dataLen > CHUNKCOUNT * 50);
     
     String[] archiveArgs = {"DataType", fileSys.getUri().toString() + DATASINK.toString(),
         fileSys.getUri().toString() +OUTPUT_DIR.toString() };
     
     assertEquals("true", jc.get("archive.groupByClusterName"));
     assertEquals(1, jc.getInt("io.sort.mb", 5));
     
     int returnVal = ToolRunner.run(jc,  new ChukwaArchiveBuilder(), archiveArgs);
     assertEquals(0, returnVal);
     fstat = fileSys.getFileStatus(DEST_FILE);
     assertEquals(dataLen, fstat.getLen());    
     
     Thread.sleep(1000);
     
     SinkArchiver a = new SinkArchiver();
     fileSys.delete(new Path("/chukwa"), true);
 
     writeASinkFile(jc, fileSys, DATASINKFILE, CHUNKCOUNT);
     writeASinkFile(jc, fileSys, DATASINK_NOTDONE, 50);
     writeASinkFile(jc, fileSys, DEST_FILE, 10);
     
     long doneLen = fileSys.getFileStatus(DATASINKFILE).getLen();
     long notDoneLen = fileSys.getFileStatus(DATASINK_NOTDONE).getLen();
     long archFileLen = fileSys.getFileStatus(DEST_FILE).getLen();
 
     //we now have three files: one closed datasink, one "unfinished" datasink,
     //and one archived.  After merge, should have two datasink files,
     //plus the "unfinished" datasink
     
     a.exec(fileSys, jc);
 
     browseDir(fileSys, new Path("/"), 0);    //OUTPUT_DIR, 0);
     
       //make sure we don't scramble anything
     assertEquals(notDoneLen, fileSys.getFileStatus(DATASINK_NOTDONE).getLen());
     assertEquals(archFileLen, fileSys.getFileStatus(DEST_FILE).getLen());
     //and make sure promotion worked right
 
     assertEquals(doneLen, fileSys.getFileStatus(MERGED_DATASINK).getLen());
     mr.shutdown();
     dfs.shutdown();
     
   }
   
 }