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78 changes: 78 additions & 0 deletions
78
...t-core/src/main/java/co/elastic/apm/agent/impl/transaction/AbstractRefCountedContext.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * Licensed to Elasticsearch B.V. under one or more contributor | ||
| * license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright | ||
| * ownership. Elasticsearch B.V. 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 co.elastic.apm.agent.impl.transaction; | ||
|
|
||
| import co.elastic.apm.agent.tracer.pooling.Recyclable; | ||
| import co.elastic.apm.agent.impl.ElasticApmTracer; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| import java.util.concurrent.atomic.AtomicInteger; | ||
|
|
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| public abstract class AbstractRefCountedContext<T extends AbstractRefCountedContext<T>> extends ElasticContext<T> implements Recyclable { | ||
| private static final Logger logger = LoggerFactory.getLogger(AbstractRefCountedContext.class); | ||
|
|
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| private final AtomicInteger references = new AtomicInteger(); | ||
|
|
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| protected AbstractRefCountedContext(ElasticApmTracer tracer) { | ||
| super(tracer); | ||
| } | ||
|
|
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| @Override | ||
| public void incrementReferences() { | ||
| int referenceCount = references.incrementAndGet(); | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("increment references to {} ({})", this, referenceCount); | ||
| if (logger.isTraceEnabled()) { | ||
| logger.trace("incrementing references at", | ||
| new RuntimeException("This is an expected exception. Is just used to record where the reference count has been incremented.")); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void decrementReferences() { | ||
| int referenceCount = references.decrementAndGet(); | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("decrement references to {} ({})", this, referenceCount); | ||
| if (logger.isTraceEnabled()) { | ||
| logger.trace("decrementing references at", | ||
| new RuntimeException("This is an expected exception. Is just used to record where the reference count has been decremented.")); | ||
| } | ||
| } | ||
| if (referenceCount == 0) { | ||
| recycle(); | ||
| } | ||
| } | ||
|
|
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| public boolean isReferenced() { | ||
| return references.get() > 0; | ||
| } | ||
|
|
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| public int getReferenceCount() { | ||
| return references.get(); | ||
| } | ||
|
|
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| protected abstract void recycle(); | ||
|
|
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| @Override | ||
| public void resetState() { | ||
| references.set(0); | ||
| } | ||
| } |
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