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[feat][broker] PIP-264: Add broker web executor metrics (apache#22816)
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...-broker-common/src/main/java/org/apache/pulsar/broker/web/WebExecutorThreadPoolStats.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
| package org.apache.pulsar.broker.web; | ||
|
|
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| import com.google.common.annotations.VisibleForTesting; | ||
| import io.opentelemetry.api.common.AttributeKey; | ||
| import io.opentelemetry.api.common.Attributes; | ||
| import io.opentelemetry.api.metrics.Meter; | ||
| import io.opentelemetry.api.metrics.ObservableLongUpDownCounter; | ||
|
|
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| public class WebExecutorThreadPoolStats implements AutoCloseable { | ||
| // Replaces ['pulsar_web_executor_max_threads', 'pulsar_web_executor_min_threads'] | ||
| public static final String LIMIT_COUNTER = "pulsar.web.executor.thread.limit"; | ||
| private final ObservableLongUpDownCounter limitCounter; | ||
|
|
||
| // Replaces | ||
| // ['pulsar_web_executor_active_threads', 'pulsar_web_executor_current_threads', 'pulsar_web_executor_idle_threads'] | ||
| public static final String USAGE_COUNTER = "pulsar.web.executor.thread.usage"; | ||
| private final ObservableLongUpDownCounter usageCounter; | ||
|
|
||
| public static final AttributeKey<String> LIMIT_TYPE_KEY = | ||
| AttributeKey.stringKey("pulsar.web.executor.thread.limit.type"); | ||
| @VisibleForTesting | ||
| enum LimitType { | ||
| MAX, | ||
| MIN; | ||
| public final Attributes attributes = Attributes.of(LIMIT_TYPE_KEY, name().toLowerCase()); | ||
| } | ||
|
|
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| public static final AttributeKey<String> USAGE_TYPE_KEY = | ||
| AttributeKey.stringKey("pulsar.web.executor.thread.usage.type"); | ||
| @VisibleForTesting | ||
| enum UsageType { | ||
| ACTIVE, | ||
| CURRENT, | ||
| IDLE; | ||
| public final Attributes attributes = Attributes.of(USAGE_TYPE_KEY, name().toLowerCase()); | ||
| } | ||
|
|
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| public WebExecutorThreadPoolStats(Meter meter, WebExecutorThreadPool executor) { | ||
| limitCounter = meter | ||
| .upDownCounterBuilder(LIMIT_COUNTER) | ||
| .setUnit("{thread}") | ||
| .setDescription("The thread limits for the pulsar-web executor pool.") | ||
| .buildWithCallback(measurement -> { | ||
| measurement.record(executor.getMaxThreads(), LimitType.MAX.attributes); | ||
| measurement.record(executor.getMinThreads(), LimitType.MIN.attributes); | ||
| }); | ||
| usageCounter = meter | ||
| .upDownCounterBuilder(USAGE_COUNTER) | ||
| .setUnit("{thread}") | ||
| .setDescription("The current usage of threads in the pulsar-web executor pool.") | ||
| .buildWithCallback(measurement -> { | ||
| var idleThreads = executor.getIdleThreads(); | ||
| var currentThreads = executor.getThreads(); | ||
| measurement.record(idleThreads, UsageType.IDLE.attributes); | ||
| measurement.record(currentThreads, UsageType.CURRENT.attributes); | ||
| measurement.record(currentThreads - idleThreads, UsageType.ACTIVE.attributes); | ||
| }); | ||
| } | ||
|
|
||
| @Override | ||
| public synchronized void close() { | ||
| limitCounter.close(); | ||
| usageCounter.close(); | ||
| } | ||
| } |
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