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Fix Pulsar Function localrun with multiple instances and metrics serv…
…er is enabled (apache#10208)
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256 changes: 177 additions & 79 deletions
256
...r-broker/src/test/java/org/apache/pulsar/functions/worker/PulsarFunctionLocalRunTest.java
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43 changes: 43 additions & 0 deletions
43
...e/src/main/java/org/apache/pulsar/functions/instance/stats/FunctionCollectorRegistry.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| /** | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.pulsar.functions.instance.stats; | ||
|
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| import io.prometheus.client.Collector; | ||
| import io.prometheus.client.CollectorRegistry; | ||
|
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| /** | ||
| * Internal representation of Prometheus Collector Registry | ||
| */ | ||
| public abstract class FunctionCollectorRegistry extends CollectorRegistry { | ||
| public static FunctionCollectorRegistry getDefaultImplementation() { | ||
| return new FunctionCollectorRegistryImpl(); | ||
| } | ||
|
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| /** | ||
| * Register a metric if it does not yet exist. If it does exist, then return the existing metric. | ||
| * Currently, only needed by the LocalRunner when running in threaded and exposing metrics via a http server. | ||
| * This method helps resolve the conflict in which multiple instances within the LocalRunner process try to register the same metric. | ||
| * @param metricName the name of the metric | ||
| * @param collector the metric object e.g. Count, Gauge, etc. | ||
| * @param <T> | ||
| * @return If the metric with the name `metricName` already exists, return the existing metric object. If not, return null | ||
| */ | ||
| public abstract <T extends Collector> T registerIfNotExist(String metricName, T collector); | ||
| } |
42 changes: 42 additions & 0 deletions
42
...c/main/java/org/apache/pulsar/functions/instance/stats/FunctionCollectorRegistryImpl.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| /** | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.pulsar.functions.instance.stats; | ||
|
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| import io.prometheus.client.Collector; | ||
|
|
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
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| public class FunctionCollectorRegistryImpl extends FunctionCollectorRegistry { | ||
|
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| private final Map<String, Collector> namesToCollectors = new HashMap<String, Collector>(); | ||
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| public Collector registerIfNotExist(String metricName, Collector collector) { | ||
| synchronized (this) { | ||
| Collector existingCollector = namesToCollectors.get(metricName); | ||
| if (existingCollector == null) { | ||
| namesToCollectors.put(metricName, collector); | ||
| super.register(collector); | ||
| return collector; | ||
| } | ||
| return existingCollector; | ||
| } | ||
| } | ||
| } |
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