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MetricsService.java
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MetricsService.java
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package io.retel.ariproxy.metrics;
import akka.actor.typed.Behavior;
import akka.actor.typed.PostStop;
import akka.actor.typed.PreRestart;
import akka.actor.typed.javadsl.Behaviors;
import io.micrometer.core.instrument.*;
import io.micrometer.core.instrument.composite.CompositeMeterRegistry;
import io.micrometer.jmx.JmxConfig;
import io.micrometer.jmx.JmxMeterRegistry;
import io.micrometer.prometheus.PrometheusConfig;
import io.micrometer.prometheus.PrometheusMeterRegistry;
import io.retel.ariproxy.boundary.commandsandresponses.auxiliary.AriMessageType;
import io.retel.ariproxy.metrics.api.MetricRegistered;
import io.retel.ariproxy.metrics.api.PrometheusMetricsReport;
import io.retel.ariproxy.metrics.api.ReportPrometheusMetrics;
import java.time.Duration;
import java.time.Instant;
import java.util.HashMap;
import java.util.Map;
public class MetricsService {
private static final String METRIC_NAME_PERSISTENCE_UPDATE_DELAY =
"ariproxy.persistence.WriteTime";
private static final String METRIC_NAME_CALL_SETUP_DELAY = "ariproxy.calls.SetupDelay";
private MetricsService() {
throw new IllegalStateException("Utility class");
}
public static Behavior<MetricsServiceMessage> create() {
return Behaviors.setup(
ctx -> {
final CompositeMeterRegistry registry = new CompositeMeterRegistry();
final JmxMeterRegistry jmxMeterRegistry =
new JmxMeterRegistry(JmxConfig.DEFAULT, Clock.SYSTEM);
final PrometheusMeterRegistry prometheusMeterRegistry =
new PrometheusMeterRegistry(PrometheusConfig.DEFAULT);
registry.add(jmxMeterRegistry);
registry.add(prometheusMeterRegistry);
Timer.builder(METRIC_NAME_PERSISTENCE_UPDATE_DELAY)
.publishPercentileHistogram(true)
.maximumExpectedValue(Duration.ofSeconds(3))
.register(registry);
Timer.builder(METRIC_NAME_CALL_SETUP_DELAY)
.publishPercentileHistogram(true)
.maximumExpectedValue(Duration.ofSeconds(3))
.register(registry);
final Map<String, Instant> timers = new HashMap<>();
final Map<String, Counter> counters = new HashMap<>();
final Map<AriMessageType, Counter> eventCounters = new HashMap<>();
return Behaviors.receive(MetricsServiceMessage.class)
.onMessage(
PresistenceUpdateTimerStart.class,
msg -> handlePersistenceUpdateStart(timers, msg))
.onMessage(
PersistenceUpdateTimerStop.class,
msg -> handlePersistenceUpdateStop(timers, registry, msg))
.onMessage(
IncreaseCounter.class, msg -> handleIncreaseCounter(counters, registry, msg))
.onMessage(
IncreaseAriEventCounter.class,
msg -> handleAriIncreaseCounter(eventCounters, registry, msg))
.onMessage(StartCallSetupTimer.class, msg -> handleStartCallSetupTimer(timers, msg))
.onMessage(
StopCallSetupTimer.class, msg -> handleStopCallSetupTimer(timers, registry, msg))
.onMessage(
ReportPrometheusMetrics.class,
msg -> handleReportPrometheusMetrics(prometheusMeterRegistry, msg))
.onSignal(PostStop.class, signal -> cleanup(registry))
.onSignal(PreRestart.class, signal -> cleanup(registry))
.build();
});
}
private static Behavior<MetricsServiceMessage> handleReportPrometheusMetrics(
final PrometheusMeterRegistry prometheusMeterRegistry, final ReportPrometheusMetrics msg) {
msg.replyTo().tell(new PrometheusMetricsReport(prometheusMeterRegistry.scrape()));
return Behaviors.same();
}
private static Behavior<MetricsServiceMessage> handlePersistenceUpdateStart(
final Map<String, Instant> timers, final PresistenceUpdateTimerStart message) {
timers.put(message.getContext(), Instant.now());
message.getReplyTo().ifPresent(replyTo -> replyTo.tell(MetricRegistered.TIMER_STARTED));
return Behaviors.same();
}
private static Behavior<MetricsServiceMessage> handlePersistenceUpdateStop(
final Map<String, Instant> timers,
final MeterRegistry registry,
final PersistenceUpdateTimerStop message) {
final Instant timer = timers.get(message.getContext());
if (timer != null) {
registry
.timer(METRIC_NAME_PERSISTENCE_UPDATE_DELAY)
.record(Duration.between(timer, Instant.now()));
timers.remove(message.getContext());
}
message.getReplyTo().ifPresent(replyTo -> replyTo.tell(MetricRegistered.TIMER_STOPPED));
return Behaviors.same();
}
private static Behavior<MetricsServiceMessage> handleIncreaseCounter(
final Map<String, Counter> counters,
final MeterRegistry registry,
final IncreaseCounter message) {
counters.computeIfAbsent(message.getName(), registry::counter).increment();
message.getReplyTo().ifPresent(replyTo -> replyTo.tell(MetricRegistered.COUNTER_INCREASED));
return Behaviors.same();
}
private static Behavior<MetricsServiceMessage> handleAriIncreaseCounter(
final Map<AriMessageType, Counter> counters,
final MeterRegistry registry,
final IncreaseAriEventCounter message) {
counters
.computeIfAbsent(
message.getEventType(),
eventType ->
Counter.builder("ariproxy.events")
.tag("eventType", eventType.name())
.register(registry))
.increment();
message.getReplyTo().ifPresent(replyTo -> replyTo.tell(MetricRegistered.COUNTER_INCREASED));
return Behaviors.same();
}
private static Behavior<MetricsServiceMessage> handleStartCallSetupTimer(
final Map<String, Instant> timers, final StartCallSetupTimer message) {
timers.put(message.getCallContext(), Instant.now());
message.getReplyTo().ifPresent(replyTo -> replyTo.tell(MetricRegistered.TIMER_STARTED));
return Behaviors.same();
}
private static Behavior<MetricsServiceMessage> handleStopCallSetupTimer(
final Map<String, Instant> timers,
final MeterRegistry registry,
final StopCallSetupTimer message) {
final Instant timer = timers.get(message.getCallcontext());
if (timer != null) {
registry.timer(METRIC_NAME_CALL_SETUP_DELAY).record(Duration.between(timer, Instant.now()));
timers.remove(message.getCallcontext());
}
message.getReplyTo().ifPresent(replyTo -> replyTo.tell(MetricRegistered.TIMER_STOPPED));
return Behaviors.same();
}
private static Behavior<MetricsServiceMessage> cleanup(final MeterRegistry registry) {
registry.close();
return Behaviors.same();
}
}