package backtype.storm.metric;
import backtype.storm.Config;
import backtype.storm.metric.api.AssignableMetric;
import backtype.storm.metric.api.IMetric;
import backtype.storm.task.IBolt;
import backtype.storm.task.OutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.tuple.Tuple;
import clojure.lang.AFn;
import clojure.lang.IFn;
import clojure.lang.RT;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.management.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
// There is one task inside one executor for each worker of the topology.
// TaskID is always -1, therefore you can only send-unanchored tuples to co-located SystemBolt.
// This bolt was conceived to export worker stats via metrics api.
public class SystemBolt implements IBolt {
private static Logger LOG = LoggerFactory.getLogger(SystemBolt.class);
private static boolean _prepareWasCalled = false;
private static class MemoryUsageMetric implements IMetric {
IFn _getUsage;
public MemoryUsageMetric(IFn getUsage) {
_getUsage = getUsage;
}
@Override
public Object getValueAndReset() {
MemoryUsage memUsage;
try {
memUsage = (MemoryUsage) _getUsage.invoke();
} catch (Exception e) {
LOG.error("Failed to get userage ", e);
throw new RuntimeException(e);
}
HashMap m = new HashMap();
m.put("maxBytes", memUsage.getMax());
m.put("committedBytes", memUsage.getCommitted());
m.put("initBytes", memUsage.getInit());
m.put("usedBytes", memUsage.getUsed());
m.put("virtualFreeBytes", memUsage.getMax() - memUsage.getUsed());
m.put("unusedBytes", memUsage.getCommitted() - memUsage.getUsed());
return m;
}
}
// canonically the metrics data exported is time bucketed when doing counts.
// convert the absolute values here into time buckets.
private static class GarbageCollectorMetric implements IMetric {
GarbageCollectorMXBean _gcBean;
Long _collectionCount;
Long _collectionTime;
public GarbageCollectorMetric(GarbageCollectorMXBean gcBean) {
_gcBean = gcBean;
}
@Override
public Object getValueAndReset() {
Long collectionCountP = _gcBean.getCollectionCount();
Long collectionTimeP = _gcBean.getCollectionTime();
Map ret = null;
if (_collectionCount != null && _collectionTime != null) {
ret = new HashMap();
ret.put("count", collectionCountP - _collectionCount);
ret.put("timeMs", collectionTimeP - _collectionTime);
}
_collectionCount = collectionCountP;
_collectionTime = collectionTimeP;
return ret;
}
}
@Override
public void prepare(final Map stormConf, TopologyContext context,
OutputCollector collector) {
if (_prepareWasCalled
&& !"local".equals(stormConf.get(Config.STORM_CLUSTER_MODE))) {
throw new RuntimeException(
"A single worker should have 1 SystemBolt instance.");
}
_prepareWasCalled = true;
int bucketSize = RT.intCast(stormConf
.get(Config.TOPOLOGY_BUILTIN_METRICS_BUCKET_SIZE_SECS));
final RuntimeMXBean jvmRT = ManagementFactory.getRuntimeMXBean();
context.registerMetric("uptimeSecs", new IMetric() {
@Override
public Object getValueAndReset() {
return jvmRT.getUptime() / 1000.0;
}
}, bucketSize);
context.registerMetric("startTimeSecs", new IMetric() {
@Override
public Object getValueAndReset() {
return jvmRT.getStartTime() / 1000.0;
}
}, bucketSize);
context.registerMetric("newWorkerEvent", new IMetric() {
boolean doEvent = true;
@Override
public Object getValueAndReset() {
if (doEvent) {
doEvent = false;
return 1;
} else
return 0;
}
}, bucketSize);
final MemoryMXBean jvmMemRT = ManagementFactory.getMemoryMXBean();
context.registerMetric("memory/heap", new MemoryUsageMetric(new AFn() {
public Object invoke() {
return jvmMemRT.getHeapMemoryUsage();
}
}), bucketSize);
context.registerMetric("memory/nonHeap", new MemoryUsageMetric(
new AFn() {
public Object invoke() {
return jvmMemRT.getNonHeapMemoryUsage();
}
}), bucketSize);
for (GarbageCollectorMXBean b : ManagementFactory
.getGarbageCollectorMXBeans()) {
context.registerMetric("GC/" + b.getName().replaceAll("\\W", ""),
new GarbageCollectorMetric(b), bucketSize);
}
}
@Override
public void execute(Tuple input) {
throw new RuntimeException(
"Non-system tuples should never be sent to __system bolt.");
}
@Override
public void cleanup() {
}
}