public Set<String> getAllMetricNames() {
Set<String> metricNames = new HashSet<>();
for (LevelCache levelCache : caches.values()) {
metricNames.addAll(levelCache.getContents().keySet());
}
return metricNames;
}
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!");
}
