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Added a MetricsService as a push wrapper around io.micrometer
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139 changes: 139 additions & 0 deletions
139
...ngboot/src/main/java/de/digitalcollections/commons/springboot/metrics/MetricsService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| package de.digitalcollections.commons.springboot.metrics; | ||
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| import io.micrometer.core.instrument.ImmutableTag; | ||
| import io.micrometer.core.instrument.MeterRegistry; | ||
| import io.micrometer.core.instrument.Tag; | ||
| import io.micrometer.core.instrument.Timer; | ||
| import java.util.HashMap; | ||
| import java.util.HashSet; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import java.util.concurrent.TimeUnit; | ||
| import org.springframework.stereotype.Service; | ||
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| @Service | ||
| public class MetricsService { | ||
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| protected Map<String, Long> counters = new HashMap<>(); | ||
| protected Map<String,Set<Tag>> counterTags = new HashMap<>(); | ||
| protected Map<String, Timer> timers = new HashMap<>(); | ||
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| private final MeterRegistry meterRegistry; | ||
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| public MetricsService(MeterRegistry meterRegistry) { | ||
| this.meterRegistry = meterRegistry; | ||
| } | ||
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| /** | ||
| * Sets the value of a gauge | ||
| * @param name Name of the gauge, postfixed with <tt>.amount</tt> | ||
| * @param value Value of the gauge | ||
| */ | ||
| public void setGauge(String name, long value) { | ||
| handleCounter(name, null, null, value, null, false); | ||
| } | ||
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| /** | ||
| * Sets the value of a gauge | ||
| * @param name Name of the gauge, postfixed with <tt>.amount</tt> | ||
| * @param tag Name of the tag | ||
| * @param value Value of the gauge | ||
| */ | ||
| public void setGauge(String name, String tag, long value) { | ||
| handleCounter(name, tag, null, value, null, false); | ||
| } | ||
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| /** | ||
| * Increases the gauge counter by one | ||
| * @param name Name of the gauge, postfixed with <tt>.amount</tt> | ||
| * @param tag Name of the tag | ||
| */ | ||
| public void increaseCounter(String name, String tag) { | ||
| handleCounter(name, tag, 1L, null, null, false); | ||
| } | ||
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| /** | ||
| * Increases the gauge counter with a custom increment | ||
| * @param name Name of the gauge, postfixed with <tt>.amount</tt> | ||
| * @param tag Name of the tag | ||
| * @param increment Increment value | ||
| */ | ||
| public void increaseCounter(String name, String tag, long increment) { | ||
| handleCounter(name, tag, increment, null,null, false); | ||
| } | ||
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| /** | ||
| * Increases the gauge counter and logs its accompanied duration | ||
| * @param name Name of the gauge, postfixed with <tt>.amount</tt> and name of the timer, postfixed with <tt>.duration</tt> | ||
| * @param tag Name of the tag | ||
| * @param durationMillis Duration in milliseconds | ||
| */ | ||
| public void increaseCounterWithDuration(String name, String tag, Long durationMillis) { | ||
| handleCounter(name, tag, 1L, null, durationMillis, false); | ||
| } | ||
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| /** | ||
| * Increases the gauge counter and logs its accompanied duration including percentiles (0.5 and 0.95) and histogram | ||
| * @param name Name of the gauge, postfixed with <tt>.amount</tt> and name of the timer, postfixed with <tt>.duration</tt> | ||
| * @param tag Name of the tag (must not be null) | ||
| * @param durationMillis Duration in milliseconds | ||
| */ | ||
| public void increaseCounterWithDurationAndPercentiles(String name, String tag, Long durationMillis) { | ||
| handleCounter(name, tag, 1L, null, durationMillis, true); | ||
| } | ||
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| private void handleCounter(String name, String tag, Long increment, Long absoluteValue, Long durationMillis, Boolean publishPercentiles) { | ||
| String key = name + ( tag != null ? "." + tag : ""); | ||
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| if ( increment != null ) { | ||
| // Increase counter value | ||
| counters.put(key, counters.getOrDefault(key, 0L) + increment); | ||
| } else { | ||
| counters.put(key, absoluteValue); | ||
| } | ||
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| // Register counter, if it doesn't exist yet | ||
| if (counterTags.get(key) == null) { | ||
| counterTags.put(key, new HashSet<>()); | ||
| if ( tag != null ) { | ||
| counterTags.get(key).add(new ImmutableTag("type", tag)); | ||
| meterRegistry.gauge(name + ".amount", counterTags.get(key), key, counters::get); | ||
| } else { | ||
| meterRegistry.gauge(name + ".amount", counters.get(key)); | ||
| } | ||
| } | ||
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| if (durationMillis != null && tag != null) { | ||
| // Register Timer | ||
| if (timers.get(key) == null) { | ||
| Timer.Builder timerBuilder = Timer.builder(name + ".duration") | ||
| .tag("type", tag); | ||
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| if ( publishPercentiles ) { | ||
| timerBuilder = timerBuilder.publishPercentiles(0.5, 0.95) | ||
| .publishPercentileHistogram(); | ||
| } | ||
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| Timer timer = timerBuilder | ||
| .register(meterRegistry); | ||
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| timers.put(key, timer); | ||
| } | ||
| // Record time | ||
| timers.get(key).record(durationMillis, TimeUnit.MILLISECONDS); | ||
| } | ||
| } | ||
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| // ------------------------------- only for tests | ||
| protected Map<String, Long> getCounters() { | ||
| return counters; | ||
| } | ||
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| protected Map<String, Set<Tag>> getCounterTags() { | ||
| return counterTags; | ||
| } | ||
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| protected Map<String, Timer> getTimers() { | ||
| return timers; | ||
| } | ||
| } |
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