Examples with MetricsVisitor org.apache.samza.metrics.MetricsVisitor used on opensource projects

Example 1 with MetricsVisitor

use of org.apache.samza.metrics.MetricsVisitor in project samza by apache.

the class MetricsSnapshotReporter method innerRun.

public void innerRun() {
    LOG.debug("Begin flushing metrics.");
    for (MetricsRegistryWithSource metricsRegistryWithSource : this.registries) {
        String source = metricsRegistryWithSource.getSource();
        ReadableMetricsRegistry registry = metricsRegistryWithSource.getRegistry();
        LOG.debug("Flushing metrics for {}.", source);
        Map<String, Map<String, Object>> metricsMsg = new HashMap<>();
        // metrics
        registry.getGroups().forEach(group -> {
            Map<String, Object> groupMsg = new HashMap<>();
            registry.getGroup(group).forEach((name, metric) -> {
                if (!shouldIgnore(group, name)) {
                    metric.visit(new MetricsVisitor() {

                        @Override
                        public void counter(Counter counter) {
                            groupMsg.put(name, counter.getCount());
                        }

                        @Override
                        public <T> void gauge(Gauge<T> gauge) {
                            groupMsg.put(name, gauge.getValue());
                        }

                        @Override
                        public void timer(Timer timer) {
                            groupMsg.put(name, timer.getSnapshot().getAverage());
                        }
                    });
                }
            });
            // dont emit empty groups
            if (!groupMsg.isEmpty()) {
                metricsMsg.put(group, groupMsg);
            }
        });
        // publish to Kafka only if the metricsMsg carries any metrics
        if (!metricsMsg.isEmpty()) {
            MetricsHeader header = new MetricsHeader(this.jobName, this.jobId, this.containerName, this.executionEnvContainerId, Optional.of(this.samzaEpochId), source, this.version, this.samzaVersion, this.host, this.clock.currentTimeMillis(), this.resetTime);
            Metrics metrics = new Metrics(metricsMsg);
            LOG.debug("Flushing metrics for {} to {} with header and map: header={}, map={}.", source, out, header.getAsMap(), metrics.getAsMap());
            MetricsSnapshot metricsSnapshot = new MetricsSnapshot(header, metrics);
            Object maybeSerialized = (this.serializer != null) ? this.serializer.toBytes(metricsSnapshot) : metricsSnapshot;
            try {
                this.producer.send(source, new OutgoingMessageEnvelope(this.out, this.host, null, maybeSerialized));
                // Always flush, since we don't want metrics to get batched up.
                this.producer.flush(source);
            } catch (Exception e) {
                LOG.error(String.format("Exception when flushing metrics for source %s", source), e);
            }
        }
    }
    LOG.debug("Finished flushing metrics.");
}