agresch commented on a change in pull request #3417:
URL: https://github.com/apache/storm/pull/3417#discussion_r732236032
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File path: storm-client/src/jvm/org/apache/storm/metric/SystemBolt.java
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@@ -63,33 +65,46 @@ public Long getValue() {
}
});
- // newWorkerEvent: 1 when a worker is first started and 0 all other
times.
- // This can be used to tell when a worker has crashed and is restarted.
- final IMetric newWorkerEvent = new IMetric() {
- boolean doEvent = true;
- @Override
- public Object getValueAndReset() {
- if (doEvent) {
- doEvent = false;
- return 1;
- } else {
- return 0;
- }
- }
- };
- context.registerGauge("newWorkerEvent", new Gauge<Integer>() {
- @Override
- public Integer getValue() {
- return (Integer) newWorkerEvent.getValueAndReset();
- }
- });
+ context.registerGauge("newWorkerEvent", new NewWorkerGauge());
int bucketSize =
ObjectReader.getInt(topoConf.get(Config.TOPOLOGY_BUILTIN_METRICS_BUCKET_SIZE_SECS));
registerMetrics(context, (Map<String, String>)
topoConf.get(Config.WORKER_METRICS), bucketSize, topoConf);
registerMetrics(context, (Map<String, String>)
topoConf.get(Config.TOPOLOGY_WORKER_METRICS), bucketSize, topoConf);
}
+ // newWorkerEvent: 1 when a worker is first started and 0 all other times.
+ // This can be used to tell when a worker has crashed and is restarted.
+ private class NewWorkerImetric implements IMetric {
+ boolean doEvent = true;
+
+ @Override
+ public Object getValueAndReset() {
+ if (doEvent) {
+ doEvent = false;
+ return 1;
+ } else {
+ return 0;
+ }
+ }
+ }
+
+ // allow reporting new worker metric for multiple reporters if they
support getValueForReporter().
+ private class NewWorkerGauge extends PerReporterGauge<Integer> {
+ private final NewWorkerImetric defaultValue = new NewWorkerImetric();
+ private final Map<Object, NewWorkerImetric> reporterValues = new
HashMap<>();
+
+ @Override
+ public Integer getValue() {
+ return (Integer) defaultValue.getValueAndReset();
+ }
Review comment:
getValueForReporter() should be called when possible, but reporters need
to know that this gauge is of this class to do this. So a codahale
ConsoleReporter won't be calling this.
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