content: /*
   * 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.dataloader;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.HashSet;
  import java.util.concurrent.CompletionService;
  import java.util.concurrent.ExecutorCompletionService;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.fs.FileStatus;
  import org.apache.hadoop.fs.FileSystem;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.util.ToolRunner;
  import org.apache.hadoop.chukwa.analysis.salsa.fsm.FSMBuilder;
  import org.apache.hadoop.chukwa.conf.ChukwaConfiguration;
  import org.apache.hadoop.chukwa.util.ExceptionUtil;
  import org.apache.hadoop.conf.Configuration;
  
  public class FSMDataLoader extends DataLoaderFactory {
    private static Log log = LogFactory.getLog(FSMDataLoader.class);
  
    protected MetricDataLoader threads[] = null;
    private static String DATA_LOADER_THREAD_LIMIT = "chukwa.data.loader.threads.limit";
    private int size = 1;
    private CompletionService completion = null;
    private ExecutorService executor = null;
    private static String[] mappers = {
      "org.apache.hadoop.chukwa.analysis.salsa.fsm.DataNodeClientTraceMapper",
      "org.apache.hadoop.chukwa.analysis.salsa.fsm.TaskTrackerClientTraceMapper",
      "org.apache.hadoop.chukwa.analysis.salsa.fsm.JobHistoryTaskDataMapper"
    };
    
    public FSMDataLoader() {
    }
    
    public void load(ChukwaConfiguration conf, FileSystem fs, FileStatus[] fileList) throws IOException {
  
      if(executor==null) {
        try {
          this.size = Integer.parseInt(conf.get(DATA_LOADER_THREAD_LIMIT));
        } catch(Exception e) {
          this.size = 1;
        }
        executor = Executors.newFixedThreadPool(size);
      }
      if(completion==null) {
        completion = new ExecutorCompletionService(executor);
      }
      
      try {
        // Locate directory output directories of the current demux, and create a unique directory list.
        HashSet<Path> inputPaths = new HashSet<Path>();
        HashSet<Path> outputPaths = new HashSet<Path>();
        int counter = 0;
        for(int i=0;i<fileList.length;i++) {
          Path temp = fileList[i].getPath().getParent();
          if(!inputPaths.contains(temp)) {
            inputPaths.add(temp);
          }
        }
        String outputDir= conf.get("chukwa.tmp.data.dir")+File.separator+"fsm_"+System.currentTimeMillis()+"_";
        if(inputPaths.size()>0) {
          Configuration fsmConf = new Configuration();
          // Run fsm map reduce job for dn, tt, and jobhist.
          for(String mapper : mappers) {
            String[] args = new String[inputPaths.size()+3];
            args[0]="-in";
            int k=2;
            boolean hasData=false;
            for(Path temp : inputPaths) {
              String tempPath = temp.toUri().toString();
              if((mapper.intern()==mappers[0].intern() && tempPath.indexOf("ClientTraceDetailed")>0) ||
                  (mapper.intern()==mappers[1].intern() && tempPath.indexOf("ClientTraceDetailed")>0) ||
                  (mapper.intern()==mappers[2].intern() && tempPath.indexOf("TaskData")>0) ||
                  (mapper.intern()==mappers[2].intern() && tempPath.indexOf("JobData")>0)) {
                args[k]=tempPath;
                k++;
                hasData=true;
              }
            }
            args[1]=k-2+"";
            fsmConf.set("chukwa.salsa.fsm.mapclass", mapper);
            args[k]=outputDir+mapper;
            Path outputPath = new Path(args[k]);
            outputPaths.add(outputPath);
            if(hasData) {
              int res = ToolRunner.run(fsmConf, new FSMBuilder(), args);
              log.debug("Job Status: "+res);
            }
          }
        }
        // Find the mapreduce output and load to MDL.
        for(Path outputPath : outputPaths) {
          Path searchDir = new Path(outputPath.toUri().toString()+"/*/*/*.evt");
          log.info("Search dir:"+searchDir.toUri().toString());
          FileStatus[] outputList = fs.globStatus(searchDir);
          if(outputList!=null) {
            for(int j=0;j<outputList.length;j++) {
              String outputFile = outputList[j].getPath().toUri().toString();
              log.info("FSM -> MDL loading: "+outputFile);
              completion.submit(new MetricDataLoader(conf, fs, outputFile));
              counter++;
            }
          } else {
            log.warn("No output to load.");
          }
        }
        for(int i=0;i<counter;i++) {
          completion.take().get();
        }
        // Clean up mapreduce output of fsm.
        for(Path dir : outputPaths) {
          fs.delete(dir, true);
        }
      } catch(Exception e) {
        log.error(ExceptionUtil.getStackTrace(e));
        throw new IOException();
      }
    }
  
    public void shutdown() throws InterruptedException {
      executor.shutdown();
      executor.awaitTermination(30, TimeUnit.SECONDS);
      executor.shutdownNow();
    }
  }
  