67 lines
2.3 KiB
Java
67 lines
2.3 KiB
Java
/*
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* Copyright 2011 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.util.internal;
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import java.util.Collection;
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import java.util.concurrent.BlockingQueue;
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import io.netty.util.UnsafeDetectUtil;
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/**
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* This factory should be used to create the "optimal" {@link BlockingQueue} instance for the running JVM.
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*
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*/
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public final class QueueFactory {
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private static final boolean useUnsafe = UnsafeDetectUtil.isUnsafeFound(QueueFactory.class.getClassLoader());
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private QueueFactory() {
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// only use static methods!
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}
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/**
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* Create a new unbound {@link BlockingQueue}
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*
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* @param itemClass the {@link Class} type which will be used as {@link BlockingQueue} items
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* @return queue the {@link BlockingQueue} implementation
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*/
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public static <T> BlockingQueue<T> createQueue(Class<T> itemClass) {
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if (useUnsafe) {
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return new LinkedTransferQueue<T>();
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} else {
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return new LegacyLinkedTransferQueue<T>();
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}
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}
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/**
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* Create a new unbound {@link BlockingQueue}
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*
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* @param collection the collection which should get copied to the newly created {@link BlockingQueue}
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* @param itemClass the {@link Class} type which will be used as {@link BlockingQueue} items
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* @return queue the {@link BlockingQueue} implementation
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*/
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public static <T> BlockingQueue<T> createQueue(Collection<? extends T> collection, Class<T> itemClass) {
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if (useUnsafe) {
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return new LinkedTransferQueue<T>(collection);
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} else {
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return new LegacyLinkedTransferQueue<T>(collection);
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}
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}
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}
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