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[enh][monitor]: add metrics for pulsar web service thread pool (#14742)
Fixes #14459 ### Motivation See the issue ### Modifications 1. Add WebExecutorStats to record web thread pool metrics
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pulsar-broker/src/main/java/org/apache/pulsar/broker/web/WebExecutorStats.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 io.prometheus.client.CollectorRegistry; | ||
| import io.prometheus.client.Gauge; | ||
| import java.util.concurrent.atomic.AtomicBoolean; | ||
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| class WebExecutorStats implements AutoCloseable { | ||
| private static final AtomicBoolean CLOSED = new AtomicBoolean(false); | ||
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| private final Gauge maxThreads; | ||
| private final Gauge minThreads; | ||
| private final Gauge idleThreads; | ||
| private final Gauge activeThreads; | ||
| private final Gauge currentThreads; | ||
| private final WebExecutorThreadPool executor; | ||
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|
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| private static volatile WebExecutorStats instance; | ||
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| static synchronized WebExecutorStats getStats(WebExecutorThreadPool executor) { | ||
| if (null == instance) { | ||
| instance = new WebExecutorStats(executor); | ||
| } | ||
|
|
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| return instance; | ||
| } | ||
|
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| private WebExecutorStats(WebExecutorThreadPool executor) { | ||
| this.executor = executor; | ||
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| this.maxThreads = Gauge.build("pulsar_web_executor_max_threads", "-").create() | ||
| .setChild(new Gauge.Child() { | ||
| public double get() { | ||
| return WebExecutorStats.this.executor.getMaxThreads(); | ||
| } | ||
| }) | ||
| .register(); | ||
|
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| this.minThreads = Gauge.build("pulsar_web_executor_min_threads", "-").create() | ||
| .setChild(new Gauge.Child() { | ||
| public double get() { | ||
| return WebExecutorStats.this.executor.getMinThreads(); | ||
| } | ||
| }) | ||
| .register(); | ||
|
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| this.idleThreads = Gauge.build("pulsar_web_executor_idle_threads", "-").create() | ||
| .setChild(new Gauge.Child() { | ||
| public double get() { | ||
| return WebExecutorStats.this.executor.getIdleThreads(); | ||
| } | ||
| }) | ||
| .register(); | ||
|
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| this.activeThreads = Gauge.build("pulsar_web_executor_active_threads", "-").create() | ||
| .setChild(new Gauge.Child() { | ||
| public double get() { | ||
| return WebExecutorStats.this.executor.getThreads() | ||
| - WebExecutorStats.this.executor.getIdleThreads(); | ||
| } | ||
| }) | ||
| .register(); | ||
|
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| this.currentThreads = Gauge.build("pulsar_web_executor_current_threads", "-").create() | ||
| .setChild(new Gauge.Child() { | ||
| public double get() { | ||
| return WebExecutorStats.this.executor.getThreads(); | ||
| } | ||
| }) | ||
| .register(); | ||
| } | ||
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| @Override | ||
| public void close() throws Exception { | ||
| if (CLOSED.compareAndSet(false, true)) { | ||
| CollectorRegistry.defaultRegistry.unregister(this.activeThreads); | ||
| CollectorRegistry.defaultRegistry.unregister(this.maxThreads); | ||
| CollectorRegistry.defaultRegistry.unregister(this.minThreads); | ||
| CollectorRegistry.defaultRegistry.unregister(this.idleThreads); | ||
| CollectorRegistry.defaultRegistry.unregister(this.currentThreads); | ||
| } | ||
| } | ||
| } |
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