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#615 collect circuit breaker metrics
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160 changes: 160 additions & 0 deletions
160
...gateleen/queue/queuing/circuitbreaker/monitoring/QueueCircuitBreakerMetricsCollector.java
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| Original file line number | Diff line number | Diff line change |
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| package org.swisspush.gateleen.queue.queuing.circuitbreaker.monitoring; | ||
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| import io.micrometer.core.instrument.Gauge; | ||
| import io.micrometer.core.instrument.MeterRegistry; | ||
| import io.vertx.core.*; | ||
| import io.vertx.core.json.JsonObject; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.swisspush.gateleen.core.exception.GateleenExceptionFactory; | ||
| import org.swisspush.gateleen.core.lock.Lock; | ||
| import org.swisspush.gateleen.core.util.Address; | ||
| import org.swisspush.gateleen.core.util.LockUtil; | ||
| import org.swisspush.gateleen.queue.queuing.circuitbreaker.QueueCircuitBreakerStorage; | ||
| import org.swisspush.gateleen.queue.queuing.circuitbreaker.util.QueueCircuitState; | ||
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.concurrent.atomic.AtomicInteger; | ||
| import java.util.function.Function; | ||
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| import static org.swisspush.gateleen.core.util.LockUtil.acquireLock; | ||
| import static org.swisspush.gateleen.core.util.LockUtil.calcLockExpiry; | ||
| import static org.swisspush.gateleen.queue.queuing.circuitbreaker.impl.RedisQueueCircuitBreakerStorage.*; | ||
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| public class QueueCircuitBreakerMetricsCollector { | ||
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| private final Logger log = LoggerFactory.getLogger(QueueCircuitBreakerMetricsCollector.class); | ||
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| private final Lock lock; | ||
| private final LockUtil lockUtil; | ||
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| public static final String COLLECT_METRICS_TASK_LOCK = "collectCircuitBreakerMetrics"; | ||
| public static final String CIRCUIT_BREAKER_STATUS_METRIC = "gateleen.circuitbreaker.status"; | ||
| public static final String CIRCUIT_BREAKER_FAILRATIO_METRIC = "gateleen.circuitbreaker.failratio"; | ||
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| private final QueueCircuitBreakerStorage queueCircuitBreakerStorage; | ||
| private final MeterRegistry meterRegistry; | ||
| private final long metricCollectionIntervalMs; | ||
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| private final Map<String, AtomicInteger> circuitStateMap = new HashMap<>(); | ||
| private final Map<String, AtomicInteger> circuitFailRatioMap = new HashMap<>(); | ||
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| public QueueCircuitBreakerMetricsCollector(Vertx vertx, Lock lock, QueueCircuitBreakerStorage queueCircuitBreakerStorage, | ||
| MeterRegistry meterRegistry, GateleenExceptionFactory exceptionFactory, | ||
| long metricCollectionIntervalSeconds) { | ||
| this.lock = lock; | ||
| this.lockUtil = new LockUtil(exceptionFactory); | ||
| this.queueCircuitBreakerStorage = queueCircuitBreakerStorage; | ||
| this.meterRegistry = meterRegistry; | ||
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| this.metricCollectionIntervalMs = metricCollectionIntervalSeconds * 1000; | ||
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| vertx.setPeriodic(metricCollectionIntervalMs, event -> { | ||
| collectMetrics().onFailure(event1 -> log.error("Could not collect metrics. Message: {}", event1.getMessage())); | ||
| }); | ||
| } | ||
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| public Future<Void> collectMetrics() { | ||
| log.debug("Collecting metrics"); | ||
| Promise<Void> promise = Promise.promise(); | ||
| final String token = createToken(COLLECT_METRICS_TASK_LOCK); | ||
| acquireLock(lock, COLLECT_METRICS_TASK_LOCK, token, calcLockExpiry(metricCollectionIntervalMs), log).onComplete(lockEvent -> { | ||
| if (lockEvent.succeeded()) { | ||
| if (lockEvent.result()) { | ||
| handleMetricsCollection(token).onComplete(event -> { | ||
| if (event.succeeded()) { | ||
| promise.complete(); | ||
| } else { | ||
| promise.fail(event.cause()); | ||
| } | ||
| }); | ||
| } else { | ||
| promise.complete(); | ||
| } | ||
| } else { | ||
| log.error("Could not acquire lock '{}'. Message: {}", COLLECT_METRICS_TASK_LOCK, lockEvent.cause().getMessage()); | ||
| promise.fail(lockEvent.cause().getMessage()); | ||
| } | ||
| }); | ||
| return promise.future(); | ||
| } | ||
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| private Future<Void> handleMetricsCollection(String token) { | ||
| return queueCircuitBreakerStorage.getAllCircuits().compose((Function<JsonObject, Future<Void>>) entries -> { | ||
| extractMetricsFromCircuitsObject(entries); | ||
| return Future.succeededFuture(); | ||
| }).andThen(event -> lockUtil.releaseLock(lock, COLLECT_METRICS_TASK_LOCK, token, log)); | ||
| } | ||
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| private void extractMetricsFromCircuitsObject(JsonObject circuits) { | ||
| circuits.stream().forEach(entry -> { | ||
| String circuitName = entry.getKey(); | ||
| JsonObject circuitValue = (JsonObject) entry.getValue(); | ||
| QueueCircuitState queueCircuitState = QueueCircuitState.fromString(circuitValue.getString(FIELD_STATUS), null); | ||
| if (queueCircuitState == null) { | ||
| log.warn("No status found for circuit '{}'", circuitName); | ||
| return; | ||
| } | ||
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| JsonObject infos = circuitValue.getJsonObject("infos"); | ||
| if (infos != null) { | ||
| String metric = infos.getString(FIELD_METRICNAME); | ||
| Integer failRatio = infos.getInteger(FIELD_FAILRATIO); | ||
| if (metric != null && failRatio != null) { | ||
| publishMetric(metric, queueCircuitState, failRatio); | ||
| } | ||
| } | ||
| }); | ||
| } | ||
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| private void publishMetric(String metricName, QueueCircuitState queueCircuitState, int failRatio) { | ||
| Integer stateValue = circuitStateToValue(queueCircuitState); | ||
| if(stateValue != null) { | ||
| getCircuitStateMeter(metricName).set(stateValue); | ||
| } | ||
| getCircuitFailRatioMeter(metricName).set(failRatio); | ||
| } | ||
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| private String createToken(String appendix) { | ||
| return Address.instanceAddress() + "_" + System.currentTimeMillis() + "_" + appendix; | ||
| } | ||
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| private AtomicInteger getCircuitStateMeter(String metricName) { | ||
| return circuitStateMap.computeIfAbsent(metricName, key -> { | ||
| AtomicInteger newMeterValue = new AtomicInteger(); | ||
| Gauge.builder(CIRCUIT_BREAKER_STATUS_METRIC, newMeterValue, AtomicInteger::get) | ||
| .description("Status of the circuit, 0=CLOSED, 1=HALF_OPEN, 2=OPEN") | ||
| .tag("metricName", metricName) | ||
| .register(meterRegistry); | ||
| return newMeterValue; | ||
| }); | ||
| } | ||
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| private AtomicInteger getCircuitFailRatioMeter(String metricName) { | ||
| return circuitFailRatioMap.computeIfAbsent(metricName, key -> { | ||
| AtomicInteger newMeterValue = new AtomicInteger(); | ||
| Gauge.builder(CIRCUIT_BREAKER_FAILRATIO_METRIC, newMeterValue, AtomicInteger::get) | ||
| .description("Fail ratio of the circuit in percentage") | ||
| .tag("metricName", metricName) | ||
| .register(meterRegistry); | ||
| return newMeterValue; | ||
| }); | ||
| } | ||
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| private Integer circuitStateToValue(QueueCircuitState queueCircuitState) { | ||
| if (queueCircuitState == null) { | ||
| return null; | ||
| } | ||
| switch (queueCircuitState) { | ||
| case CLOSED: | ||
| return 0; | ||
| case HALF_OPEN: | ||
| return 1; | ||
| case OPEN: | ||
| return 2; | ||
| default: | ||
| return null; | ||
| } | ||
| } | ||
| } |
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