org.apache.hadoop.chukwa.dataloader.FSMDataLoader.java Source code

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Here is the source code for org.apache.hadoop.chukwa.dataloader.FSMDataLoader.java

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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.dataloader;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
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.FileUtil;
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 static CompletionService completion = null;
    private static 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);
                    }
                }
            }
            // 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();
        } finally {
        }
    }

    public void shutdown() throws InterruptedException {
        executor.shutdown();
        executor.awaitTermination(30, TimeUnit.SECONDS);
        executor.shutdownNow();
    }
}