Examples of com.google.common.base.Stopwatch

com.google.common.base.Stopwatch
onal long millis = stopwatch. {@link #elapsedMillis elapsedMillis}(); log.info("that took: " + stopwatch); // formatted string like "12.3 ms"
Stopwatch methods are not idempotent; it is an error to start or stop a stopwatch that is already in the desired state.
When testing code that uses this class, use the {@linkplain #Stopwatch(Ticker) alternate constructor} to supply a fake or mock ticker. This allows you to simulate any valid behavior of the stopwatch.
Note: This class is not thread-safe. @author Kevin Bourrillion @since Guava release 10

  }


  private class Monitor implements Runnable {
    @Override
    public void run() {
      Stopwatch sw = new Stopwatch();
      Map<String, GcTimes> gcTimesBeforeSleep = getGcTimes();
      while (shouldRun) {
        sw.reset().start();
        try {
          Thread.sleep(SLEEP_INTERVAL_MS);
        } catch (InterruptedException ie) {
          return;
        }
        long extraSleepTime = sw.elapsedMillis() - SLEEP_INTERVAL_MS;
        Map<String, GcTimes> gcTimesAfterSleep = getGcTimes();


        if (extraSleepTime > warnThresholdMs) {
          ++numGcWarnThresholdExceeded;
          LOG.warn(formatMessage(

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      masterMachine.setExtraData(GUEST_OS_USER, masterSpec.getLoginCredentials().getUser());
      masterMachine.setExtraData(GUEST_OS_PASSWORD, masterSpec.getLoginCredentials().getPassword());


      SshClient client = sshClientForIMachine.apply(masterMachine);
      logger.debug(">> awaiting installation to finish node(%s)", masterName);
      Stopwatch stopwatch = new Stopwatch();
      stopwatch.start();
      checkState(sshResponds.apply(client), "timed out waiting for guest %s to be accessible via ssh", masterName);
      stopwatch.stop();
      logger.debug(String.format("Elapsed time for the OS installation: %d minutes", TimeUnit.SECONDS.convert(stopwatch.elapsed(TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS)));
      NodeMetadata nodeMetadata = imachineToNodeMetadata.apply(masterMachine);


      logger.debug(">> awaiting post-installation actions on vm: %s", masterName);
      ListenableFuture<ExecResponse> execCleanup = machineUtils.runScriptOnNode(nodeMetadata,
               call("cleanupUdevIfNeeded"), RunScriptOptions.NONE);

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        this.coordinator = coordinator;
        this.sessionId = sessionId;
        this.isLocallyOwned = locallyOwned;
        sessionIdBytes = ByteBufferUtil.bytes(sessionId);
        watch = new Stopwatch();
        watch.start();
    }

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    for (int numPoints = start; numPoints <= end; numPoints *= factor) {
      try {
        BitmapFactory bf = new ConciseBitmapFactory();
        RTree tree = new RTree(2, new LinearGutmanSplitStrategy(0, 50, bf), bf);


        Stopwatch stopwatch = new Stopwatch().start();
        Random rand = new Random();
        for (int i = 0; i < numPoints; i++) {
          tree.insert(new float[]{(float) (rand.nextDouble() * 100), (float) (rand.nextDouble() * 100)}, i);
        }
        long stop = stopwatch.elapsedMillis();
        System.out.printf("[%,d]: insert = %,d ms%n", numPoints, stop);


        stopwatch.reset().start();
        ImmutableRTree searchTree = ImmutableRTree.newImmutableFromMutable(tree);
        stop = stopwatch.elapsedMillis();
        System.out.printf("[%,d]: size = %,d bytes%n", numPoints, searchTree.toBytes().length);
        System.out.printf("[%,d]: buildImmutable = %,d ms%n", numPoints, stop);


        stopwatch.reset().start();


        Iterable<ImmutableGenericBitmap> points = searchTree.search(new RadiusBound(new float[]{50, 50}, radius));


        Iterables.size(points);
        stop = stopwatch.elapsedMillis();


        System.out.printf("[%,d]: search = %,dms%n", numPoints, stop);


        stopwatch.reset().start();


        ImmutableGenericBitmap finalSet = bf.union(points);


        stop = stopwatch.elapsedMillis();
        System.out.printf("[%,d]: union of %,d points in %,d ms%n", numPoints, finalSet.size(), stop);
      }
      catch (Exception e) {
        throw Throwables.propagate(e);
      }

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    for (int numPoints = start; numPoints <= end; numPoints *= factor) {
      try {
        BitmapFactory bf = new ConciseBitmapFactory();
        RTree tree = new RTree(2, new LinearGutmanSplitStrategy(0, 50, bf), bf);


        Stopwatch stopwatch = new Stopwatch().start();
        Random rand = new Random();
        for (int i = 0; i < numPoints; i++) {
          tree.insert(new float[]{(float) (rand.nextDouble() * 100), (float) (rand.nextDouble() * 100)}, i);
        }
        long stop = stopwatch.elapsedMillis();
        System.out.printf("[%,d]: insert = %,d ms%n", numPoints, stop);


        stopwatch.reset().start();
        ImmutableRTree searchTree = ImmutableRTree.newImmutableFromMutable(tree);
        stop = stopwatch.elapsedMillis();
        System.out.printf("[%,d]: size = %,d bytes%n", numPoints, searchTree.toBytes().length);
        System.out.printf("[%,d]: buildImmutable = %,d ms%n", numPoints, stop);


        stopwatch.reset().start();


        Iterable<ImmutableGenericBitmap> points = searchTree.search(
            new RectangularBound(
                new float[]{40, 40},
                new float[]{60, 60},
                100
            )
        );


        Iterables.size(points);
        stop = stopwatch.elapsedMillis();


        System.out.printf("[%,d]: search = %,dms%n", numPoints, stop);


        stopwatch.reset().start();


        ImmutableGenericBitmap finalSet = bf.union(points);


        stop = stopwatch.elapsedMillis();
        System.out.printf("[%,d]: union of %,d points in %,d ms%n", numPoints, finalSet.size(), stop);
      }
      catch (Exception e) {
        throw Throwables.propagate(e);
      }

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  private boolean expireAppMasterZKSession(TwillController controller, long timeout, TimeUnit timeoutUnit) {
    MBeanServer mbeanServer = MBeanRegistry.getInstance().getPlatformMBeanServer();
    QueryExp query = Query.isInstanceOf(new StringValueExp(ConnectionMXBean.class.getName()));


    Stopwatch stopwatch = new Stopwatch();


    do {
      // Find the AM session and expire it
      Set<ObjectName> connectionBeans = mbeanServer.queryNames(ObjectName.WILDCARD, query);
      for (ObjectName objectName : connectionBeans) {


        ConnectionMXBean connectionBean = MBeanServerInvocationHandler.newProxyInstance(mbeanServer, objectName,
                                                                                        ConnectionMXBean.class, false);
        for (String node : connectionBean.getEphemeralNodes()) {
          if (node.endsWith("/instances/" + controller.getRunId().getId())) {
            // This is the AM, expire the session.
            LOG.info("Kill AM session {}", connectionBean.getSessionId());
            connectionBean.terminateSession();
            return true;
          }
        }
      }
    } while (stopwatch.elapsedTime(timeoutUnit) < timeout);


    return false;
  }

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    // This is a test to make sure commit time stays the same as time goes on.
    @Test
    @Ignore("OAK-461")
    public void commitTime() throws Exception {
        boolean debug = false;
        final Stopwatch watch = new Stopwatch();
        for (int i = 0; i < 1000; i++) {
            watch.start();
            String diff = "+\"a"+i+"\" : {} +\"b"+i+"\" : {} +\"c"+i+"\" : {}";
            if (debug) {
                System.out.println("Committing: " + diff);
            }
            mk.commit("/", diff, null, null);
            watch.stop();
            if (debug) {
                System.out.println("Committed in " + watch.elapsed(TimeUnit.MILLISECONDS) + "ms");
            }
        }
        if (debug) {
            System.out.println("Final Result:" + watch);
        }

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      try {
        loadTimes = Lists.newArrayListWithCapacity(
            states.size() - states.count(NEW) + states.count(STARTING));
        for (Entry<Service, Stopwatch> entry : startupTimers.entrySet()) {
          Service service = entry.getKey();
          Stopwatch stopWatch = entry.getValue();
          // N.B. we check the service state in the multimap rather than via Service.state() because
          // the multimap is guaranteed to be in sync with our timers while the Service.state() is
          // not.  Due to happens-before ness of the monitor this 'weirdness' will not be observable
          // by our caller.
          if (!stopWatch.isRunning() && !servicesByState.containsEntry(NEW, service) 
              && !(service instanceof NoOpService)) {
            loadTimes.add(Maps.immutableEntry(service, stopWatch.elapsed(MILLISECONDS)));
          }
        }
      } finally {
        monitor.leave();
      }

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        checkState(servicesByState.remove(from, service),
            "Service %s not at the expected location in the state map %s", service, from);
        checkState(servicesByState.put(to, service),
            "Service %s in the state map unexpectedly at %s", service, to);
        // Update the timer
        Stopwatch stopwatch = startupTimers.get(service);
        if (from == NEW) {
          stopwatch.start();
        }
        if (to.compareTo(RUNNING) >= 0 && stopwatch.isRunning()) {
          // N.B. if we miss the STARTING event then we will never record a startup time.
          stopwatch.stop();
          if (!(service instanceof NoOpService)) {
            logger.log(Level.FINE, "Started {0} in {1}.",
                new Object[] {service, stopwatch});
          }
        }

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  @Nullable
  Map<K, V> loadAll(Set<? extends K> keys, CacheLoader<? super K, V> loader)
      throws ExecutionException {
    checkNotNull(loader);
    checkNotNull(keys);
    Stopwatch stopwatch = Stopwatch.createStarted();
    Map<K, V> result;
    boolean success = false;
    try {
      @SuppressWarnings("unchecked") // safe since all keys extend K
      Map<K, V> map = (Map<K, V>) loader.loadAll(keys);
      result = map;
      success = true;
    } catch (UnsupportedLoadingOperationException e) {
      success = true;
      throw e;
    } catch (InterruptedException e) {
      Thread.currentThread().interrupt();
      throw new ExecutionException(e);
    } catch (RuntimeException e) {
      throw new UncheckedExecutionException(e);
    } catch (Exception e) {
      throw new ExecutionException(e);
    } catch (Error e) {
      throw new ExecutionError(e);
    } finally {
      if (!success) {
        globalStatsCounter.recordLoadException(stopwatch.elapsed(NANOSECONDS));
      }
    }


    if (result == null) {
      globalStatsCounter.recordLoadException(stopwatch.elapsed(NANOSECONDS));
      throw new InvalidCacheLoadException(loader + " returned null map from loadAll");
    }


    stopwatch.stop();
    // TODO(fry): batch by segment
    boolean nullsPresent = false;
    for (Map.Entry<K, V> entry : result.entrySet()) {
      K key = entry.getKey();
      V value = entry.getValue();
      if (key == null || value == null) {
        // delay failure until non-null entries are stored
        nullsPresent = true;
      } else {
        put(key, value);
      }
    }


    if (nullsPresent) {
      globalStatsCounter.recordLoadException(stopwatch.elapsed(NANOSECONDS));
      throw new InvalidCacheLoadException(loader + " returned null keys or values from loadAll");
    }


    // TODO(fry): record count of loaded entries
    globalStatsCounter.recordLoadSuccess(stopwatch.elapsed(NANOSECONDS));
    return result;
  }

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