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The Java operations layer for the MongoDB Java Driver. Third parties can wrap this layer to provide custom higher-level APIs

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/*
 * Copyright 2008-present MongoDB, Inc.
 *
 * Licensed 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 com.mongodb.internal.binding;

import java.util.concurrent.atomic.AtomicInteger;

/**
 * 

This class is not part of the public API and may be removed or changed at any time

*/ public abstract class AbstractReferenceCounted implements ReferenceCounted { private final AtomicInteger referenceCount = new AtomicInteger(1); @Override public int getCount() { return referenceCount.get(); } @Override public ReferenceCounted retain() { if (referenceCount.incrementAndGet() == 1) { throw new IllegalStateException("Attempted to increment the reference count when it is already 0"); } return this; } @Override public int release() { int decrementedValue = referenceCount.decrementAndGet(); if (decrementedValue < 0) { throw new IllegalStateException("Attempted to decrement the reference count below 0"); } return decrementedValue; } }




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