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feat: extract micrometer support into its own module #577

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Oct 5, 2021
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31 changes: 31 additions & 0 deletions micrometer-support/pom.xml
Original file line number Diff line number Diff line change
@@ -0,0 +1,31 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>java-operator-sdk</artifactId>
<groupId>io.javaoperatorsdk</groupId>
<version>1.9.8-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>

<artifactId>micrometer-support</artifactId>
<name>Operator SDK - Micrometer Support</name>

<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>

<dependencies>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-core</artifactId>
</dependency>
<dependency>
<groupId>io.javaoperatorsdk</groupId>
<artifactId>operator-framework-core</artifactId>
</dependency>
</dependencies>

</project>
Original file line number Diff line number Diff line change
@@ -0,0 +1,83 @@
package io.javaoperatorsdk.operator.micrometer;

import java.util.Collections;
import java.util.Map;

import io.javaoperatorsdk.operator.Metrics;
import io.javaoperatorsdk.operator.processing.DefaultEventHandler.EventMonitor;
import io.javaoperatorsdk.operator.processing.event.Event;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Timer;

public class MicrometerMetrics implements Metrics {

public static final String PREFIX = "operator.sdk.";
private final MeterRegistry registry;
private final EventMonitor monitor = new EventMonitor() {
@Override
public void processedEvent(String uid, Event event) {
incrementProcessedEventsNumber();
}

@Override
public void failedEvent(String uid, Event event) {
incrementControllerRetriesNumber();
}
};

public MicrometerMetrics(MeterRegistry registry) {
this.registry = registry;
}

public <T> T timeControllerExecution(ControllerExecution<T> execution) {
final var name = execution.controllerName();
final var execName = PREFIX + "controllers.execution." + execution.name();
final var timer =
Timer.builder(execName)
.tags("controller", name)
.publishPercentiles(0.3, 0.5, 0.95)
.publishPercentileHistogram()
.register(registry);
try {
final var result = timer.record(execution::execute);
final var successType = execution.successTypeName(result);
registry
.counter(execName + ".success", "controller", name, "type", successType)
.increment();
return result;
} catch (Exception e) {
final var exception = e.getClass().getSimpleName();
registry
.counter(execName + ".failure", "controller", name, "exception", exception)
.increment();
throw e;
}
}

public void incrementControllerRetriesNumber() {
registry
.counter(
PREFIX + "retry.on.exception", "retry", "retryCounter", "type",
"retryException")
.increment();

}

public void incrementProcessedEventsNumber() {
registry
.counter(
PREFIX + "total.events.received", "events", "totalEvents", "type",
"eventsReceived")
.increment();

}

public <T extends Map<?, ?>> T monitorSizeOf(T map, String name) {
return registry.gaugeMapSize(PREFIX + name + ".size", Collections.emptyList(), map);
}

@Override
public EventMonitor getEventMonitor() {
return monitor;
}
}
4 changes: 0 additions & 4 deletions operator-framework-core/pom.xml
Original file line number Diff line number Diff line change
Expand Up @@ -62,10 +62,6 @@
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-core</artifactId>
</dependency>

<dependency>
<groupId>org.junit.jupiter</groupId>
Expand Down
Original file line number Diff line number Diff line change
@@ -1,41 +1,15 @@
package io.javaoperatorsdk.operator;

import java.util.Collections;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.function.ToDoubleFunction;
import java.util.function.ToLongFunction;

import io.micrometer.core.instrument.Clock;
import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.DistributionSummary;
import io.micrometer.core.instrument.FunctionCounter;
import io.micrometer.core.instrument.FunctionTimer;
import io.micrometer.core.instrument.Gauge;
import io.micrometer.core.instrument.Measurement;
import io.micrometer.core.instrument.Meter;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Timer;
import io.micrometer.core.instrument.distribution.DistributionStatisticConfig;
import io.micrometer.core.instrument.distribution.pause.PauseDetector;
import io.micrometer.core.instrument.noop.NoopCounter;
import io.micrometer.core.instrument.noop.NoopDistributionSummary;
import io.micrometer.core.instrument.noop.NoopFunctionCounter;
import io.micrometer.core.instrument.noop.NoopFunctionTimer;
import io.micrometer.core.instrument.noop.NoopGauge;
import io.micrometer.core.instrument.noop.NoopMeter;
import io.micrometer.core.instrument.noop.NoopTimer;
import io.javaoperatorsdk.operator.processing.DefaultEventHandler;
import io.javaoperatorsdk.operator.processing.DefaultEventHandler.EventMonitor;

public class Metrics {
public static final Metrics NOOP = new Metrics(new NoopMeterRegistry(Clock.SYSTEM));
public static final String PREFIX = "operator.sdk.";
private final MeterRegistry registry;
public interface Metrics {
Metrics NOOP = new Metrics() {};

public Metrics(MeterRegistry registry) {
this.registry = registry;
}

public interface ControllerExecution<T> {
interface ControllerExecution<T> {
String name();

String controllerName();
Expand All @@ -45,111 +19,19 @@ public interface ControllerExecution<T> {
T execute();
}

public <T> T timeControllerExecution(ControllerExecution<T> execution) {
final var name = execution.controllerName();
final var execName = PREFIX + "controllers.execution." + execution.name();
final var timer =
Timer.builder(execName)
.tags("controller", name)
.publishPercentiles(0.3, 0.5, 0.95)
.publishPercentileHistogram()
.register(registry);
try {
final var result = timer.record(execution::execute);
final var successType = execution.successTypeName(result);
registry
.counter(execName + ".success", "controller", name, "type", successType)
.increment();
return result;
} catch (Exception e) {
final var exception = e.getClass().getSimpleName();
registry
.counter(execName + ".failure", "controller", name, "exception", exception)
.increment();
throw e;
}
default <T> T timeControllerExecution(ControllerExecution<T> execution) {
return execution.execute();
}

public void incrementControllerRetriesNumber() {
registry
.counter(
PREFIX + "retry.on.exception", "retry", "retryCounter", "type",
"retryException")
.increment();

}
default void incrementControllerRetriesNumber() {}

public void incrementProcessedEventsNumber() {
registry
.counter(
PREFIX + "total.events.received", "events", "totalEvents", "type",
"eventsReceived")
.increment();
default void incrementProcessedEventsNumber() {}

default <T extends Map<?, ?>> T monitorSizeOf(T map, String name) {
return map;
}

public <T extends Map<?, ?>> T monitorSizeOf(T map, String name) {
return registry.gaugeMapSize(PREFIX + name + ".size", Collections.emptyList(), map);
}

public static class NoopMeterRegistry extends MeterRegistry {
public NoopMeterRegistry(Clock clock) {
super(clock);
}

@Override
protected <T> Gauge newGauge(Meter.Id id, T t, ToDoubleFunction<T> toDoubleFunction) {
return new NoopGauge(id);
}

@Override
protected Counter newCounter(Meter.Id id) {
return new NoopCounter(id);
}

@Override
protected Timer newTimer(
Meter.Id id,
DistributionStatisticConfig distributionStatisticConfig,
PauseDetector pauseDetector) {
return new NoopTimer(id);
}

@Override
protected DistributionSummary newDistributionSummary(
Meter.Id id, DistributionStatisticConfig distributionStatisticConfig, double v) {
return new NoopDistributionSummary(id);
}

@Override
protected Meter newMeter(Meter.Id id, Meter.Type type, Iterable<Measurement> iterable) {
return new NoopMeter(id);
}

@Override
protected <T> FunctionTimer newFunctionTimer(
Meter.Id id,
T t,
ToLongFunction<T> toLongFunction,
ToDoubleFunction<T> toDoubleFunction,
TimeUnit timeUnit) {
return new NoopFunctionTimer(id);
}

@Override
protected <T> FunctionCounter newFunctionCounter(
Meter.Id id, T t, ToDoubleFunction<T> toDoubleFunction) {
return new NoopFunctionCounter(id);
}

@Override
protected TimeUnit getBaseTimeUnit() {
return TimeUnit.SECONDS;
}

@Override
protected DistributionStatisticConfig defaultHistogramConfig() {
return DistributionStatisticConfig.NONE;
}
default DefaultEventHandler.EventMonitor getEventMonitor() {
return EventMonitor.NOOP;
}
}
Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,6 @@
import io.javaoperatorsdk.operator.api.config.ControllerConfiguration;
import io.javaoperatorsdk.operator.api.config.ExecutorServiceManager;
import io.javaoperatorsdk.operator.processing.ConfiguredController;
import io.javaoperatorsdk.operator.processing.DefaultEventHandler;
import io.javaoperatorsdk.operator.processing.DefaultEventHandler.EventMonitor;
import io.javaoperatorsdk.operator.processing.event.Event;

@SuppressWarnings("rawtypes")
public class Operator implements AutoCloseable {
Expand All @@ -32,17 +29,6 @@ public class Operator implements AutoCloseable {
public Operator(KubernetesClient k8sClient, ConfigurationService configurationService) {
this.k8sClient = k8sClient;
this.configurationService = configurationService;
DefaultEventHandler.setEventMonitor(new EventMonitor() {
@Override
public void processedEvent(String uid, Event event) {
configurationService.getMetrics().incrementProcessedEventsNumber();
}

@Override
public void failedEvent(String uid, Event event) {
configurationService.getMetrics().incrementControllerRetriesNumber();
}
});
}

/** Adds a shutdown hook that automatically calls {@link #close()} when the app shuts down. */
Expand Down
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