Java Code Examples for com.codahale.metrics.Timer#Context

/**
 * Execute one iteration of metric sampling for all the assigned partitions.
 */
protected void fetchMetricsForAssignedPartitions() throws MetricSamplingException {
  final Timer.Context ctx = _fetchTimer.time();

  try {
    MetricSampler.Samples samples = fetchSamples();
    if (_sampleStore != null) {
      _sampleStore.storeSamples(samples);
    }
    // TODO: evolve sample store interface to allow independent eviction time for different type of metric samples.
    // We are not calling sampleStore.evictSamplesBefore() because the broker metric samples and partition metric
    // samples may have different number of windows so they can not be evicted using the same timestamp.
  } catch (Exception e) {
    _fetchFailureRate.mark();
    throw e;
  } finally {
    ctx.stop();
  }
}
 

/**
 * Inserts a collection of rolled up metrics to the metrics_preaggregated_{granularity} column family.
 * Only our tests should call this method. Services should call either insertMetrics(Collection metrics)
 * or insertRollups()
 *
 * @param metrics
 * @throws IOException
 */
@VisibleForTesting
@Override
public void insertMetrics(Collection<IMetric> metrics,
                          Granularity granularity) throws IOException {

    Timer.Context ctx = Instrumentation.getWriteTimerContext(
            CassandraModel.getPreaggregatedColumnFamilyName(granularity));
    try {
        Multimap<Locator, IMetric> map = asMultimap(metrics);

        if ( isBatchIngestEnabled ) {
            insertMetricsInBatch(map, granularity);
        } else {
            insertMetricsIndividually(map, granularity);
        }
    } finally {
        ctx.stop();
    }
}
 

@Override
public void run() {
    Timer.Context ctx = batchWriteTimer.time();
    try {
        metricsRW.insertRollups(writeContexts);
    } catch (Exception e) {
        LOG.warn("not able to insert rollups", e);
        executionContext.markUnsuccessful(e);
    } finally {
        executionContext.decrementWriteCounter(writeContexts.size());
        rollupsPerBatch.update(writeContexts.size());
        rollupsWriteRate.mark(writeContexts.size());
        RollupService.lastRollupTime.set(System.currentTimeMillis());
        ctx.stop();
    }
}
 

protected void sendReportState(UUID placeId, List<Model> devices, boolean hubOffline) {
   ReportStateRequest request = null;
   try (Timer.Context ctxt = GoogleMetrics.startReportStateTimer()) {
      // @formatter:off
      request = this.gRpcContext.getRequestBuilder()
            .withPlaceId(placeId)
            .withHubOffline(hubOffline)
            .withPayloadDevices(devices)
            .build();
      // @formatter:on

      request.send(); // throws on failure to post

      // Prod is set to debug level
      logger.trace("Successfully posted ReportState for {}: Request: {}", placeId, request);
      GoogleMetrics.incReportStateSuccesses();

   }
   catch (Exception e) {
      // sometimes we send google more information than they need.  It's difficult to know which device didn't get communicated with a SYNC call.
      if (e.getMessage().contains("Requested entity was not found")) {
         logger.trace("Sent data to Google for an unknown device in place [{}]: Request: {}", placeId, request, e);
      }
      else {
         logger.warn("Failed to post ReportState for {}: Request: {}", placeId, request, e);
      }
      
      GoogleMetrics.incReportStateFailures();
   }
}
 

/**
 * Attempts to remove the head of the queue and return it. Returns null if the
 * queue is empty.
 *
 * @return Head of the queue or null.
 */
@Override
public byte[] poll() throws Exception {
  Timer.Context time = stats.time(dir + "_poll");
  try {
    return removeFirst();
  } finally {
    time.stop();
  }
}
 

/**
 * Fetches a {@link com.rackspacecloud.blueflood.types.Points} object for a
 * particular locator and rollupType from the specified column family and
 * range
 *
 * @param locator
 * @param rollupType
 * @param range
 * @param columnFamilyName
 * @return
 */
@Override
public Points getDataToRollup(final Locator locator,
                              RollupType rollupType,
                              Range range,
                              String columnFamilyName) throws IOException {
    Timer.Context ctx = Instrumentation.getReadTimerContext(columnFamilyName);
    try {
        // read the rollup object from the proper IO class
        DAbstractMetricIO io = getIO( rollupType.name().toLowerCase(), CassandraModel.getGranularity( columnFamilyName ) );

        Table<Locator, Long, Object> locatorTimestampRollup = io.getRollupsForLocator( locator, columnFamilyName, range );

        Points points = new Points();
        for (Table.Cell<Locator, Long, Object> cell : locatorTimestampRollup.cellSet()) {
            points.add( createPoint( cell.getColumnKey(), cell.getValue()));
        }
        return points;
    } catch( Exception e ) {

        Instrumentation.markReadError();
        LOG.error( String.format( "Unable to read locator=%s rolluptype=%s columnFamilyName=%s for rollup",
                locator, rollupType.name(), columnFamilyName ), e );

        throw new IOException( e );
    }
    finally {
        ctx.stop();
    }
}
 

private Optional<DetectorResult> doDetection(DetectorContainer container, MetricData metricData) {
    try (Timer.Context autoClosable = detectTimer.apply(container.getName()).time()) {
        Optional<DetectorResult> optionalDetectorResult = Optional.empty();
        try {
            DetectorResult detectorResult = detectorExecutor.doDetection(container, metricData);
            optionalDetectorResult = Optional.of(detectorResult);
        } catch (Exception e) {
            log.error("Error during anomaly detection", e);
        } finally {
            markAnomalyLevelMeter(container.getDetector(), optionalDetectorResult);
        }
        return optionalDetectorResult;
    }
}
 

@Override
public void getSequence(final byte[] seqKey, final int step, final KVStoreClosure closure) {
    final Timer.Context timeCtx = getTimeContext("GET_SEQUENCE");
    final Lock readLock = this.readWriteLock.readLock();
    readLock.lock();
    try {
        final byte[] prevBytesVal = this.db.get(this.sequenceHandle, seqKey);
        long startVal;
        if (prevBytesVal == null) {
            startVal = 0;
        } else {
            startVal = Bits.getLong(prevBytesVal, 0);
        }
        if (step < 0) {
            // never get here
            setFailure(closure, "Fail to [GET_SEQUENCE], step must >= 0");
            return;
        }
        if (step == 0) {
            setSuccess(closure, new Sequence(startVal, startVal));
            return;
        }
        final long endVal = getSafeEndValueForSequence(startVal, step);
        if (startVal != endVal) {
            final byte[] newBytesVal = new byte[8];
            Bits.putLong(newBytesVal, 0, endVal);
            this.db.put(this.sequenceHandle, this.writeOptions, seqKey, newBytesVal);
        }
        setSuccess(closure, new Sequence(startVal, endVal));
    } catch (final Exception e) {
        LOG.error("Fail to [GET_SEQUENCE], [key = {}, step = {}], {}.", BytesUtil.toHex(seqKey), step,
            StackTraceUtil.stackTrace(e));
        setCriticalError(closure, "Fail to [GET_SEQUENCE]", e);
    } finally {
        readLock.unlock();
        timeCtx.stop();
    }
}
 

/**
 * Asynchronously store a rule
 *
 * @param category Rule category
 * @param rule Rule to store
 * @throws NotificationStoreException if unable to store the rule
 */
public void store(final String category, final Rule rule) throws NotificationStoreException {

  Objects.requireNonNull(category, "category == null");
  Preconditions.checkArgument(!category.isEmpty(), "category cannot be empty");
  Objects.requireNonNull(rule, "rule == null");
  Preconditions.checkState(rule.isValid(), "rule is not valid");

  final Optional<Context> fetchContext = fetchContext();

  final MapUpdate op = new MapUpdate();
  op.update(category, getUpdate(rule, fetchContext));

  final UpdateMap.Builder builder = new UpdateMap.Builder(LOCATION, op).withTimeout(timeout);
  fetchContext.ifPresent(c -> builder.withContext(c));

  LOGGER.debug("Storing key (async): {}", LOCATION);

  try (Timer.Context context = storeTimer.time()) {
    final RiakFuture<UpdateMap.Response, Location> future = client.executeAsync(builder.build());
    future.await(requestTimeout.getQuantity(), requestTimeout.getUnit());
    if (future.isSuccess()) {
      LOGGER.debug("Successfully stored key: {}", LOCATION);
    }
  } catch (InterruptedException e) {
    LOGGER.warn("Store request was interrupted", e);
    Thread.currentThread().interrupt();
    throw new NotificationStoreException(e);
  }

  cache.invalidateAll();
}
 

@Override
protected void append(E event) {
   final Timer.Context context = logTime.time();

   try {
      String msg = layout.doLayout(event);
      getKafka().send(new ProducerRecord<String,String>(topic,msg), this);
   } finally {
      context.stop();
   }
}
 

public void insertRollups(List<SingleRollupWriteContext> writeContexts) throws ConnectionException {
    if (writeContexts.size() == 0) {
        return;
    }
    Timer.Context ctx = Instrumentation.getBatchWriteTimerContext(writeContexts.get(0).getDestinationCF().getName());
    MutationBatch mb = keyspace.prepareMutationBatch();
    for (SingleRollupWriteContext writeContext : writeContexts) {
        Rollup rollup = writeContext.getRollup();
        int ttl = (int)TTL_PROVIDER.getTTL(
                writeContext.getLocator().getTenantId(),
                writeContext.getGranularity(),
                writeContext.getRollup().getRollupType()).get().toSeconds();
        AbstractSerializer serializer = Serializers.serializerFor(rollup.getClass());
        try {
            mb.withRow(writeContext.getDestinationCF(), writeContext.getLocator())
                    .putColumn(writeContext.getTimestamp(),
                            rollup,
                            serializer,
                            ttl);
        } catch (RuntimeException ex) {
            // let's not let stupidness prevent the rest of this put.
            log.warn(String.format("Cannot save %s", writeContext.getLocator().toString()), ex);
        }
    }
    try {
        mb.execute();
    } catch (ConnectionException e) {
        Instrumentation.markWriteError(e);
        log.error("Error writing rollup batch", e);
        throw e;
    } finally {
        ctx.stop();
    }
}
 

public List<IndexEntry> getAllEntriesFromIndexSegment(File segmentFile) throws IOException, StoreException {
  verifyPath(segmentFile, false);
  IndexSegment segment = new IndexSegment(segmentFile, false, storeKeyFactory, storeConfig, storeMetrics,
      new Journal(segmentFile.getParent(), 0, 0), time);
  List<IndexEntry> entries = new ArrayList<>();
  final Timer.Context context = metrics.findAllEntriesPerIndexTimeMs.time();
  try {
    segment.getIndexEntriesSince(null, new FindEntriesCondition(Long.MAX_VALUE), entries, new AtomicLong(0), false);
  } finally {
    context.stop();
  }
  return entries;
}
 

protected CompletableFuture<Message> recordTime(Timer timer, Task task) {
  final Timer.Context timerContext = timer.time();
  try {
    return task.run();
  } finally {
    timerContext.stop();
  }
}
 

public void addTags(UUID placeId, UUID recordingId, Collection<String> tags) throws Exception {
   try (Timer.Context context = ADD_TAGS.time()) {
      videoDao.addTags(placeId, recordingId, ImmutableSet.copyOf(tags), ttlResolver.resolveTtlInSeconds(placeId));
   }
}
 

@Override
public void update(Collection<Sample> samples) {

    Timer.Context ctx = m_updateTimer.time();

    Set<StatementGenerator> generators = Sets.newHashSet();
    Map<Context, Map<Resource, ResourceMetadata>> cacheQueue = Maps.newHashMap();

    for (Sample sample : samples) {
        maybeIndexResource(cacheQueue, generators, sample.getContext(), sample.getResource());
        maybeIndexResourceAttributes(cacheQueue, generators, sample.getContext(), sample.getResource());
        maybeAddMetricName(cacheQueue, generators, sample.getContext(), sample.getResource(), sample.getName());
    }

    try {
        if (!generators.isEmpty()) {
            synchronized(statementsInFlight) {
                generators.removeAll(statementsInFlight);
                statementsInFlight.addAll(generators);
            }
            m_inserts.mark(generators.size());

            // Asynchronously execute the statements
            List<ResultSetFuture> futures = Lists.newArrayList();
            for (Statement statementToExecute : toStatements(generators)) {
                futures.add(m_session.executeAsync(statementToExecute));
            }

            for (ResultSetFuture future : futures) {
                future.getUninterruptibly();
            }
        }

        // Order matters here; We want the cache updated only after a successful Cassandra write.
        for (Context context : cacheQueue.keySet()) {
            for (Map.Entry<Resource, ResourceMetadata> entry : cacheQueue.get(context).entrySet()) {
                m_cache.merge(context, entry.getKey(), entry.getValue());
            }
        }
    }
    finally {
        synchronized(statementsInFlight) {
            statementsInFlight.removeAll(generators);
        }
        ctx.stop();
    }

}
 

@Override
public void replaceDriverState(Device device, DeviceDriverStateHolder state) {
   try(Timer.Context ctx = replaceDriverStateTimer.time()) {
      executeStateUpdate(device, state, true);
   }
}
 

public Timer.Context startConnectionGetTimer() {
    return startTimer(metricNamingStrategy.getConnectionGetTimer());
}
 

private void persistCleanupToken() throws IOException, StoreException {
      /* The cleanup token format is as follows:
         --
         token_version

         Cleanup_Token_Version_V0
          startTokenForRecovery
          endTokenForRecovery
          numBlobsInRange
          --
          blob1_blobReadOptions {version, offset, sz, ttl, key}
          blob2_blobReadOptions
          ....
          blobN_blobReadOptions
          --
          length_of_blob1_messageStoreRecoveryInfo
          blob1_messageStoreRecoveryInfo {headerVersion, userMetadataVersion, userMetadataSize, blobRecordVersion, blobStreamSize}
          length_of_blob2_messageStoreRecoveryInfo
          blob2_messageStoreRecoveryInfo
          ....
          length_of_blobN_messageStoreRecoveryInfo
          blobN_messageStoreRecoveryInfo

         Cleanup_Token_Version_V1
          startTokenForRecovery
          endTokenForRecovery
          pause flag
          numBlobsInRange
          --
          blob1_blobReadOptions {version, offset, sz, ttl, key}
          blob2_blobReadOptions
          ....
          blobN_blobReadOptions
          --
          length_of_blob1_messageStoreRecoveryInfo
          blob1_messageStoreRecoveryInfo {headerVersion, userMetadataVersion, userMetadataSize, blobRecordVersion, blobStreamSize}
          length_of_blob2_messageStoreRecoveryInfo
          blob2_messageStoreRecoveryInfo
          ....
          length_of_blobN_messageStoreRecoveryInfo
          blobN_messageStoreRecoveryInfo

         --
         crc
         ---
       */
  if (endToken == null) {
    return;
  }
  final Timer.Context context = metrics.cleanupTokenFlushTime.time();
  File tempFile = new File(dataDir, Cleanup_Token_Filename + ".tmp");
  File actual = new File(dataDir, Cleanup_Token_Filename);
  FileOutputStream fileStream = new FileOutputStream(tempFile);
  CrcOutputStream crc = new CrcOutputStream(fileStream);
  DataOutputStream writer = new DataOutputStream(crc);
  try {
    // write the current version
    writer.writeShort(Cleanup_Token_Version_V1);
    writer.write(startTokenSafeToPersist.toBytes());
    writer.write(endToken.toBytes());
    writer.writeByte(isPaused() ? (byte) 1 : (byte) 0);
    writer.write(hardDeleteRecoveryRange.toBytes());
    long crcValue = crc.getValue();
    writer.writeLong(crcValue);
    fileStream.getChannel().force(true);
    tempFile.renameTo(actual);
    if (config.storeSetFilePermissionEnabled) {
      Files.setPosixFilePermissions(actual.toPath(), config.storeDataFilePermission);
    }
  } catch (IOException e) {
    StoreErrorCodes errorCode = StoreException.resolveErrorCode(e);
    throw new StoreException(
        errorCode.toString() + " while persisting cleanup tokens to disk " + tempFile.getAbsoluteFile(), errorCode);
  } finally {
    writer.close();
    context.stop();
  }
  logger.debug("Completed writing cleanup tokens to file {}", actual.getAbsolutePath());
}
 

public void dequeueRequest(Timer.Context taskMetric) {
  queueSize.dec();
  taskMetric.stop();
}
 

/**
 * Returns a timer context which may be used to measure the time spent processing offers. The returned timer must
 * be terminated by invoking {@link Timer.Context#stop()}.
 */
public static Timer.Context getProcessOffersDurationTimer() {
  return METRICS.timer(PROCESS_OFFERS).time();
}