Exemplo n.º 1
0
 private Optional<EvictionStrategy> findEvictionStrategyForAccessLevel(
     RetentionLevel accessLevel) {
   if (evictionStrategyMap.containsKey(accessLevel.name())) {
     return Optional.of(evictionStrategyMap.get(accessLevel.name()));
   }
   return Optional.empty();
 }
Exemplo n.º 2
0
 public void updateEvictionStrategies() {
   Iterator<String> iterator = evictionStrategyMap.keySet().iterator();
   while (iterator.hasNext()) {
     String levelname = iterator.next();
     Optional<RetentionLevel> level = environment.retentions().getLevelForName(levelname);
     if (!level.isPresent() || !levelIsAccessLevel(level.get())) {
       iterator.remove();
     }
   }
   Collection<RetentionLevel> accessLevels = environment.retentions().getAllAccessLevels();
   for (RetentionLevel accessLevel : accessLevels) {
     if (caches.containsKey(accessLevel.name())
         && !evictionStrategyMap.containsKey(accessLevel.name())) {
       Optional<CachingLevel> cachingLevel =
           environment.cachingConfiguration().findLevelForLevelName(accessLevel.name());
       if (cachingLevel.isPresent()) {
         evictionStrategyMap.put(
             accessLevel.name(),
             new NaiveLRUStrategy(
                 accessLevel.name(),
                 metricStorage,
                 findAllFollowingLevelCaches(accessLevel),
                 cachingLevel.get().visibleCacheSize()));
       }
     }
   }
 }
Exemplo n.º 3
0
 @Override
 public void run() {
   Optional<RetentionLevel> accessLevel =
       environment.retentions().findAccessLevelForMetric(metricName);
   if (accessLevel.isPresent()) {
     Optional<EvictionStrategy> evictionStrategy =
         findEvictionStrategyForAccessLevel(accessLevel.get());
     if (!evictionStrategy.isPresent()) {
       log.warn("metric {} with undefined evictionStrategy!!", metricName);
       return;
     }
     caches
         .get(retentionLevel.name())
         .putDatabaseMetrics(metricName, evictionStrategy.get(), databaseMetrics, interval);
     LoadMetricEvent.fire(metricName);
   }
 }
Exemplo n.º 4
0
 private void getLevelsAbove(RetentionLevel level) throws InvalidConfigurationException {
   Collection<RetentionLevel> list = environment.retentions().getAllLevels();
   List<RetentionLevel> pointingToCurrentLevel = new LinkedList<>();
   for (RetentionLevel rlevel : list) {
     if (rlevel.next() != null) {
       if (rlevel.next().equals(level.name())) {
         pointingToCurrentLevel.add(rlevel);
       }
     }
   }
   if (!pointingToCurrentLevel.isEmpty()) {
     for (RetentionLevel nextLevel : pointingToCurrentLevel) {
       getLevelsAbove(nextLevel);
     }
   }
   updateCachingLevel(level);
 }
Exemplo n.º 5
0
 public void loadSavedMetrics() {
   List<RetentionLevel> accessLevels = environment.retentions().getAllAccessLevels();
   int numberOfAccessLevels = accessLevels.size();
   log.info("trying to load Metrics for " + numberOfAccessLevels + " accessLevels");
   List<Future<?>> futures = new ArrayList<>();
   try {
     for (RetentionLevel rlevel : accessLevels) {
       futures.addAll(loadSavedMetricsToCaches(rlevel.name()));
     }
   } catch (Exception e) {
     loadMetricsThreadPool.shutdownNow();
     try {
       loadMetricsThreadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.DAYS);
     } catch (InterruptedException e1) {
       log.error("Waiting for loadMetrics thread pool shutdown was interrupted", e1);
     }
     for (LevelCache cache : caches.values()) {
       cache.shutdown();
     }
     throw e;
   }
   log.info("Submitted a total of {} futures to pre-load metrics", futures.size());
   int logEvery = Math.max(1, futures.size() / 10);
   int futuresDone = 0;
   for (Future<?> f : futures) {
     try {
       f.get();
     } catch (InterruptedException | ExecutionException e) {
       log.warn("Exception while waiting for load metrics threads", e);
     }
     futuresDone++;
     if (futuresDone % logEvery == 0) {
       log.info("Preloaded {} of {} metrics", futuresDone, futures.size());
     }
   }
   log.info("all metrics preloaded!");
 }
Exemplo n.º 6
0
  public MetricCache(BifroestEnvironment environment) {
    this.caches = new HashMap<>();
    this.evictionStrategyMap = new HashMap<>();
    this.environment = environment;
    this.metricStorage = environment.cachingConfiguration().getMetricStorage();
    this.cachingConfig = environment.cachingConfiguration();

    ThreadFactory threads =
        new BasicThreadFactory.Builder().namingPattern("loadMetricsThread").build();
    loadMetricsThreadPool =
        new ThreadPoolExecutor(
            environment.cachingConfiguration().getMetricCacheThreads(),
            environment
                .cachingConfiguration()
                .getMetricCacheThreads(), // thread count is set to the real initial value on the
            // first run()
            0L,
            TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<>(),
            threads);

    ThreadFactory databaseThreads =
        new BasicThreadFactory.Builder().namingPattern("databaseQueryThread").build();
    databaseQueryPool =
        new ThreadPoolExecutor(
            environment.cachingConfiguration().getDatabaseThreads(),
            environment
                .cachingConfiguration()
                .getDatabaseThreads(), // thread count is set to the real initial value on the first
            // run()
            0L,
            TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<>(),
            databaseThreads);

    for (RetentionLevel retentionLevel : environment.retentions().getAllLevels()) {
      Optional<CachingLevel> cachingLevel =
          environment.cachingConfiguration().findLevelForLevelName(retentionLevel.name());
      if (cachingLevel.isPresent()) {
        caches.put(retentionLevel.name(), new LevelCache(environment, cachingLevel.get()));
        log.info("Created cache for {}", retentionLevel.name());
      } else {
        log.warn("RetentionLevel with unconfigured Cache {}", retentionLevel.name());
      }
    }

    for (RetentionLevel level : environment.retentions().getAllAccessLevels()) {
      Optional<CachingLevel> cachingLevel =
          environment.cachingConfiguration().findLevelForLevelName(level.name());
      if (cachingLevel.isPresent()) {
        int evictionStrategySize = cachingLevel.get().visibleCacheSize();
        evictionStrategyMap.put(
            level.name(),
            new NaiveLRUStrategy(
                level.name(),
                metricStorage,
                findAllFollowingLevelCaches(level),
                evictionStrategySize));
        log.trace("EvictionStrategyMap.put({})", level.name());
      }
    }

    MBeanManager.registerStandardMBean(
        this,
        MetricCache.class.getPackage().getName() + ":type=" + MetricCache.class.getSimpleName(),
        MetricCacheMBean.class);
  }
Exemplo n.º 7
0
 private void updateCachingLevel(RetentionLevel level) {
   Optional<CachingLevel> cachingLevel =
       environment.cachingConfiguration().findLevelForLevelName(level.name());
   Optional<CachingLevel> oldCachingLevel = cachingConfig.findLevelForLevelName(level.name());
   if (!cachingLevel.isPresent()) {
     log.warn("RetentionLevel with unconfigured Cache " + level.name());
   } else if (!caches.containsKey(level.name()) || !oldCachingLevel.isPresent()) {
     caches.put(level.name(), new LevelCache(environment, cachingLevel.get()));
     if (levelIsAccessLevel(level) && !evictionStrategyMap.containsKey(level.name())) {
       evictionStrategyMap.put(
           level.name(),
           new NaiveLRUStrategy(
               level.name(),
               metricStorage,
               findAllFollowingLevelCaches(level),
               cachingLevel.get().visibleCacheSize()));
     }
     log.debug("created new Cache for " + level.name());
   } else if (oldCachingLevel.get().equals(cachingLevel.get())) {
     log.debug("no changes in cachingLevel " + level.name());
   } else if (oldCachingLevel.get().cacheLineWidth() != cachingLevel.get().cacheLineWidth()) {
     caches.remove(oldCachingLevel.get().name());
     caches.put(level.name(), new LevelCache(environment, cachingLevel.get()));
     log.debug("dropped and created new cache for " + level.name());
   } else {
     log.debug("resizing level cache " + level.name());
     if (levelIsAccessLevel(level)) {
       caches
           .get(oldCachingLevel.get().name())
           .resizeAccessLevel(cachingLevel.get(), evictionStrategyMap.get(level.name()));
       evictionStrategyMap.get(level.name()).resize(cachingLevel.get().visibleCacheSize());
     } else {
       caches.get(oldCachingLevel.get().name()).resize(cachingLevel.get());
     }
   }
 }