Examples of org.apache.commons.lang.time.StopWatch

org.apache.commons.lang.time.StopWatch
StopWatch provides a convenient API for timings.

To start the watch, call {@link #start()}. At this point you can:
- {@link #split()} the watch to get the time whilst the watch continues in thebackground. {@link #unsplit()} will remove the effect of the split. At this point,these three options are available again.
- {@link #suspend()} the watch to pause it. {@link #resume()} allows the watchto continue. Any time between the suspend and resume will not be counted in the total. At this point, these three options are available again.
- {@link #stop()} the watch to complete the timing session.
It is intended that the output methods {@link #toString()} and {@link #getTime()}should only be called after stop, split or suspend, however a suitable result will be returned at other points.

NOTE: As from v2.1, the methods protect against inappropriate calls. Thus you cannot now call stop before start, resume before suspend or unsplit before split.

1. split(), suspend(), or stop() cannot be invoked twice
2. unsplit() may only be called if the watch has been split()
3. resume() may only be called if the watch has been suspend()
4. start() cannot be called twice without calling reset()
@author Henri Yandell @author Stephen Colebourne @since 2.0 @version $Id: StopWatch.java 189443 2005-06-07 21:28:07Z scolebourne $

        }


        // Holds any exception that was thrown during startup
        final ObjectHolder errorHolder = new ObjectHolder();


        StopWatch watch = new StopWatch();
        watch.start();


        // Start the server int a seperate thread
        Thread t = new Thread("Geronimo Server Runner") {
            public void run() {
                try {

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    HTableDescriptor tableDesc = table.getTableDescriptor();
    byte[] startKey = null;
    Get get = null;
    Scan scan = null;
    ResultScanner rs = null;
    StopWatch stopWatch = new StopWatch();
    for (HColumnDescriptor column : tableDesc.getColumnFamilies()) {
      stopWatch.reset();
      startKey = region.getStartKey();
      // Can't do a get on empty start row so do a Scan of first element if any instead.
      if (startKey.length > 0) {
        get = new Get(startKey);
        get.addFamily(column.getName());
      } else {
        scan = new Scan();
        scan.setCaching(1);
        scan.addFamily(column.getName());
        scan.setMaxResultSize(1L);
      }


      try {
        if (startKey.length > 0) {
          stopWatch.start();
          table.get(get);
          stopWatch.stop();
          sink.publishReadTiming(region, column, stopWatch.getTime());
        } else {
          stopWatch.start();
          rs = table.getScanner(scan);
          stopWatch.stop();
          sink.publishReadTiming(region, column, stopWatch.getTime());
        }
      } catch (Exception e) {
        sink.publishReadFailure(region, column, e);
      } finally {
        if (rs != null) {

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      HRegionInfo region = null;
      HTable table = null;
      Get get = null;
      byte[] startKey = null;
      Scan scan = null;
      StopWatch stopWatch = new StopWatch();
      // monitor one region on every region server
      for (Map.Entry<String, List<HRegionInfo>> entry : rsAndRMap.entrySet()) {
        stopWatch.reset();
        serverName = entry.getKey();
        // always get the first region
        region = entry.getValue().get(0);
        try {
          tableName = region.getTable().getNameAsString();
          table = new HTable(this.admin.getConfiguration(), tableName);
          startKey = region.getStartKey();
          // Can't do a get on empty start row so do a Scan of first element if any instead.
          if(startKey.length > 0) {
            get = new Get(startKey);
            stopWatch.start();
            table.get(get);
            stopWatch.stop();
          } else {
            scan = new Scan();
            scan.setCaching(1);
            scan.setMaxResultSize(1L);
            stopWatch.start();
            table.getScanner(scan);
            stopWatch.stop();
          }
          this.getSink().publishReadTiming(tableName, serverName, stopWatch.getTime());
        } catch (TableNotFoundException tnfe) {
          // This is ignored because it doesn't imply that the regionserver is dead
        } catch (TableNotEnabledException tnee) {
          // This is considered a success since we got a response.
          LOG.debug("The targeted table was disabled.  Assuming success.");

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        }


        // Holds any exception that was thrown during startup
        final ObjectHolder errorHolder = new ObjectHolder();


        StopWatch watch = new StopWatch();
        watch.start();


        // Start the server int a seperate thread
        Thread t = new Thread("Geronimo Server Runner") {
            public void run() {
                try {

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    MRPipelineExecution exec = pipeline.runAsync();


    // Wait until both of the two jobs are submitted.
    List<MRJob> jobs = exec.getJobs();
    assertEquals(2, jobs.size());
    StopWatch watch = new StopWatch();
    watch.start();
    int numOfJobsSubmitted = 0;
    while (numOfJobsSubmitted < 2 && watch.getTime() < 10000) {
      numOfJobsSubmitted = 0;
      for (MRJob job : jobs) {
        if (job.getJobState() == MRJob.State.RUNNING) {
          numOfJobsSubmitted++;
        }
      }
      Thread.sleep(100);
    }
    assertEquals(2, numOfJobsSubmitted);


    // Kill one of them.
    Job job0 = jobs.get(0).getJob();
    job0.killJob();


    // Expect the pipeline exits and the other job is killed.
    StopWatch watch2 = new StopWatch();
    watch2.start();
    Job job1 = jobs.get(1).getJob();
    while (!job1.isComplete() && watch2.getTime() < 10000) {
      Thread.sleep(100);
    }
    assertTrue(job1.isComplete());
    assertEquals(PipelineExecution.Status.FAILED, exec.getStatus());
  }

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        }


        // Holds any exception that was thrown during startup
        final ObjectHolder errorHolder = new ObjectHolder();


        StopWatch watch = new StopWatch();
        watch.start();


        // Start the server int a seperate thread
        Thread t = new Thread("Geronimo Server Runner") {
            public void run() {
                try {

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            return null;
        }


        runningGroups.add( groupId );


        StopWatch stopWatch = new StopWatch();
        stopWatch.reset();
        stopWatch.start();


        File mergedIndexDirectory = indexMergerRequest.getMergedIndexDirectory();


        String tempRepoId = mergedIndexDirectory.getName();


        try
        {
            File indexLocation = new File( mergedIndexDirectory, indexMergerRequest.getMergedIndexPath() );
            IndexingContext indexingContext =
                indexer.addIndexingContext( tempRepoId, tempRepoId, mergedIndexDirectory, indexLocation, null, null,
                                            mavenIndexerUtils.getAllIndexCreators() );


            for ( String repoId : indexMergerRequest.getRepositoriesIds() )
            {
                IndexingContext idxToMerge = indexer.getIndexingContexts().get( repoId );
                if ( idxToMerge != null )
                {
                    indexingContext.merge( idxToMerge.getIndexDirectory() );
                }
            }


            indexingContext.optimize();


            if ( indexMergerRequest.isPackIndex() )
            {
                IndexPackingRequest request = new IndexPackingRequest( indexingContext, indexLocation );
                indexPacker.packIndex( request );
            }


            if ( indexMergerRequest.isTemporary() )
            {
                temporaryGroupIndexes.add( new TemporaryGroupIndex( mergedIndexDirectory, tempRepoId, groupId,
                                                                    indexMergerRequest.getMergedIndexTtl() ) );
            }
            stopWatch.stop();
            log.info( "merged index for repos {} in {} s", indexMergerRequest.getRepositoriesIds(),
                      stopWatch.getTime() );
            return indexingContext;
        }
        catch ( IOException e )
        {
            throw new IndexMergerException( e.getMessage(), e );

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                return;
            }
            this.runningRemoteDownloadIds.add( this.remoteRepository.getId() );
        }
        File tempIndexDirectory = null;
        StopWatch stopWatch = new StopWatch();
        stopWatch.start();
        try
        {
            log.info( "start download remote index for remote repository " + this.remoteRepository.getId() );
            IndexingContext indexingContext = remoteRepositoryAdmin.createIndexContext( this.remoteRepository );


            // create a temp directory to download files
            tempIndexDirectory = new File( indexingContext.getIndexDirectoryFile().getParent(), ".tmpIndex" );
            File indexCacheDirectory = new File( indexingContext.getIndexDirectoryFile().getParent(), ".indexCache" );
            indexCacheDirectory.mkdirs();
            if ( tempIndexDirectory.exists() )
            {
                FileUtils.deleteDirectory( tempIndexDirectory );
            }
            tempIndexDirectory.mkdirs();
            tempIndexDirectory.deleteOnExit();
            String baseIndexUrl = indexingContext.getIndexUpdateUrl();


            final Wagon wagon = wagonFactory.getWagon( new URL( this.remoteRepository.getUrl() ).getProtocol() );
            setupWagonReadTimeout( wagon );


            // TODO transferListener
            wagon.addTransferListener( new DownloadListener() );
            ProxyInfo proxyInfo = null;
            if ( this.networkProxy != null )
            {
                proxyInfo = new ProxyInfo();
                proxyInfo.setHost( this.networkProxy.getHost() );
                proxyInfo.setPort( this.networkProxy.getPort() );
                proxyInfo.setUserName( this.networkProxy.getUsername() );
                proxyInfo.setPassword( this.networkProxy.getPassword() );
            }
            AuthenticationInfo authenticationInfo = null;
            if ( this.remoteRepository.getUserName() != null )
            {
                authenticationInfo = new AuthenticationInfo();
                authenticationInfo.setUserName( this.remoteRepository.getUserName() );
                authenticationInfo.setPassword( this.remoteRepository.getPassword() );
            }
            wagon.connect( new Repository( this.remoteRepository.getId(), baseIndexUrl ), authenticationInfo,
                           proxyInfo );


            File indexDirectory = indexingContext.getIndexDirectoryFile();
            if ( !indexDirectory.exists() )
            {
                indexDirectory.mkdirs();
            }


            ResourceFetcher resourceFetcher = new WagonResourceFetcher( log, tempIndexDirectory, wagon );
            IndexUpdateRequest request = new IndexUpdateRequest( indexingContext, resourceFetcher );
            request.setForceFullUpdate( this.fullDownload );
            request.setLocalIndexCacheDir( indexCacheDirectory );


            this.indexUpdater.fetchAndUpdateIndex( request );
            stopWatch.stop();
            log.info( "time to download remote repository index for repository {}: {} s", this.remoteRepository.getId(),
                      ( stopWatch.getTime() / 1000 ) );
        }
        catch ( MalformedURLException e )
        {
            log.error( e.getMessage(), e );
            throw new RuntimeException( e.getMessage(), e );

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        }


        // Holds any exception that was thrown during startup
        final ObjectHolder errorHolder = new ObjectHolder();


        StopWatch watch = new StopWatch();
        watch.start();


        // Start the server int a seperate thread
        Thread t = new Thread("Geronimo Server Runner") {
            public void run() {
                try {

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                // the batch size can be overriden by the request
                final int resultIterationBatchSize = (Integer) requestMessage.optionalArgs(Tokens.ARGS_BATCH_SIZE).orElse(settings.resultIterationBatchSize);


                // timer for the total serialization time
                final StopWatch stopWatch = new StopWatch();


                final EventExecutorGroup executorService = ctx.executor();
                final Future<?> iteration = executorService.submit((Callable<Void>) () -> {
                    logger.debug("Preparing to iterate results from - {} - in thread [{}]", requestMessage, Thread.currentThread().getName());


                    stopWatch.start();


                    List<Object> aggregate = new ArrayList<>(resultIterationBatchSize);
                    while (itty.hasNext()) {
                        aggregate.add(itty.next());


                        // send back a page of results if batch size is met or if it's the end of the results being
                        // iterated
                        if (aggregate.size() == resultIterationBatchSize || !itty.hasNext()) {
                            ctx.writeAndFlush(ResponseMessage.build(requestMessage)
                                    .code(ResponseStatusCode.SUCCESS)
                                    .result(aggregate).create());
                            aggregate = new ArrayList<>(resultIterationBatchSize);
                        }


                        stopWatch.split();
                        if (stopWatch.getSplitTime() > settings.serializedResponseTimeout)
                            throw new TimeoutException("Serialization of the entire response exceeded the serializeResponseTimeout setting");


                        stopWatch.unsplit();
                    }


                    return null;
                });


                iteration.addListener(f -> {
                    stopWatch.stop();


                    if (!f.isSuccess()) {
                        final String errorMessage = String.format("Response iteration and serialization exceeded the configured threshold for request [%s] - %s", msg, f.cause().getMessage());
                        logger.warn(errorMessage);
                        ctx.writeAndFlush(ResponseMessage.build(requestMessage).code(ResponseStatusCode.SERVER_ERROR_TIMEOUT).statusMessage(errorMessage).create());

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