/*
 * Copyright (c) 2008-2017, 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.internal.util.concurrent;

/**
 * Specialization of {@link ConcurrentConveyor} to a single queue.
 */
@SuppressWarnings("checkstyle:interfaceistype")
public final class ConcurrentConveyorSingleQueue<E> extends ConcurrentConveyor<E> {
    private final QueuedPipe<E> queue;

    private ConcurrentConveyorSingleQueue(E submitterGoneItem, QueuedPipe<E> queue) {
        super(submitterGoneItem, queue);
        this.queue = queue;
    }

    /**
     * Creates a new concurrent conveyor with a single queue.
     *
     * @param submitterGoneItem the object that a submitter thread can use to signal it's done submitting
     * @param queue             the concurrent queue the conveyor will manage
     */
    public static <E1> ConcurrentConveyorSingleQueue<E1> concurrentConveyorSingleQueue(
            E1 submitterGoneItem, QueuedPipe<E1> queue
    ) {
        return new ConcurrentConveyorSingleQueue<E1>(submitterGoneItem, queue);
    }

    /**
     * Offers an item to the queue.
     *
     * @return whether the item was accepted by the queue
     * @throws ConcurrentConveyorException if the draining thread has already left
     */
    public boolean offer(E item) throws ConcurrentConveyorException {
        return offer(queue, item);
    }

    /**
     * Submits an item to the queue.
     *
     * @throws ConcurrentConveyorException if the current thread is interrupted or the draining thread has already left
     */
    public void submit(E item) throws ConcurrentConveyorException {
        submit(queue, item);
    }
}