@Override
public Iterable<Measurement> measure() {
final long timestamp = clock.wallTime();
final MemoryPoolMXBean mbean = ref.get();
final List<Measurement> ms = new ArrayList<>();
if (mbean != null) {
final String typeKey = "memtype";
final String type = mbean.getName();
final MemoryUsage usage = mbean.getUsage();
ms.add(new Measurement(usedId.withTag(typeKey, type), timestamp, usage.getUsed()));
ms.add(new Measurement(committedId.withTag(typeKey, type), timestamp, usage.getCommitted()));
ms.add(new Measurement(maxId.withTag(typeKey, type), timestamp, usage.getMax()));
}
return ms;
}
/** Return the distribution summary for a given bucket. */
DistributionSummary distributionSummary(String bucket) {
return registry.distributionSummary(id.withTag("bucket", bucket));
}