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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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/* | ||
* 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; | ||
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import co.elastic.apm.agent.tracer.pooling.Recyclable; | ||
import co.elastic.apm.agent.impl.ElasticApmTracer; | ||
import org.slf4j.Logger; | ||
import org.slf4j.LoggerFactory; | ||
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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.")); | ||
} | ||
} | ||
} | ||
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@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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