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84 changes: 84 additions & 0 deletions
84
sdks/java/core/src/main/java/org/apache/beam/sdk/metrics/DelegatingGauge.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /* | ||
| * 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.beam.sdk.metrics; | ||
|
|
||
| import java.io.Serializable; | ||
| import org.apache.beam.sdk.annotations.Internal; | ||
|
|
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| /** Implementation of {@link Gauge} that delegates to the instance for the current context. */ | ||
| @Internal | ||
| public class DelegatingGauge implements Metric, Gauge, Serializable { | ||
| private final MetricName name; | ||
| private final boolean processWideContainer; | ||
| private final boolean perWorkerGauge; | ||
|
|
||
| /** | ||
| * Create a {@code DelegatingGauge} with {@code perWorkerGauge} and {@code processWideContainer} | ||
| * set to false. | ||
| * | ||
| * @param name Metric name for this metric. | ||
| */ | ||
| public DelegatingGauge(MetricName name) { | ||
| this(name, false, false); | ||
| } | ||
|
|
||
| /** | ||
| * Create a {@code DelegatingGauge} with {@code perWorkerGauge} set to false. | ||
| * | ||
| * @param name Metric name for this metric. | ||
| * @param processWideContainer Whether this Gauge is stored in the ProcessWide container or the | ||
| * current thread's container. | ||
| */ | ||
| public DelegatingGauge(MetricName name, boolean processWideContainer) { | ||
| this(name, processWideContainer, false); | ||
| } | ||
|
|
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| /** | ||
| * @param name Metric name for this metric. | ||
| * @param processWideContainer Whether this gauge is stored in the ProcessWide container or the | ||
| * current thread's container. | ||
| * @param perWorkerGauge Whether this gauge refers to a perWorker metric or not. | ||
| */ | ||
| public DelegatingGauge(MetricName name, boolean processWideContainer, boolean perWorkerGauge) { | ||
| this.name = name; | ||
| this.processWideContainer = processWideContainer; | ||
| this.perWorkerGauge = perWorkerGauge; | ||
| } | ||
|
|
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| /** Set the gauge. */ | ||
| @Override | ||
| public void set(long n) { | ||
| MetricsContainer container = | ||
| this.processWideContainer | ||
| ? MetricsEnvironment.getProcessWideContainer() | ||
| : MetricsEnvironment.getCurrentContainer(); | ||
| if (container == null) { | ||
| return; | ||
| } | ||
| if (perWorkerGauge) { | ||
| container.getPerWorkerGauge(name).set(n); | ||
| } else { | ||
| container.getGauge(name).set(n); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public MetricName getName() { | ||
| return name; | ||
| } | ||
| } |
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