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/*
 * Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
 *
 * 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.hazelcast.collection;

import com.hazelcast.transaction.TransactionalQueue;

import javax.annotation.Nonnull;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;

/**
 * Concurrent, blocking, distributed, observable queue.
 * 

* The IQueue is not a partitioned data-structure. All the content of an * IQueue is stored in a single machine (and in the backup). * The IQueue will not scale by adding more members to the cluster. * * @param queue item type * @see BaseQueue * @see java.util.Queue * @see BlockingQueue * @see TransactionalQueue */ public interface IQueue extends BlockingQueue, BaseQueue, ICollection { /* * Added poll(), poll(long timeout, TimeUnit unit) and take() * methods here to prevent wrong method return type issue when * compiled with java 8. * * For additional details see: * * http://mail.openjdk.java.net/pipermail/compiler-dev/2014-November/009139.html * https://bugs.openjdk.java.net/browse/JDK-8064803 * */ /** * {@inheritDoc} */ E poll(); /** * {@inheritDoc} */ E poll(long timeout, @Nonnull TimeUnit unit) throws InterruptedException; /** * {@inheritDoc} */ @Nonnull E take() throws InterruptedException; /** * Returns LocalQueueStats for this queue. * LocalQueueStats is the statistics for the local portion of this * queue. * * @return this queue's local statistics. */ LocalQueueStats getLocalQueueStats(); }





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