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1   /*
2    * Copyright 2019 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.channel;
17  
18  import java.util.Queue;
19  
20  /**
21   * Factory used to create {@link Queue} instances that will be used to store tasks for an {@link EventLoop}.
22   *
23   * Generally speaking the returned {@link Queue} MUST be thread-safe and depending on the {@link EventLoop}
24   * implementation must be of type {@link java.util.concurrent.BlockingQueue}.
25   */
26  public interface EventLoopTaskQueueFactory {
27  
28      /**
29       * Returns a new {@link Queue} to use.
30       * @param maxCapacity the maximum amount of elements that can be stored in the {@link Queue} at a given point
31       *                    in time.
32       * @return the new queue.
33       */
34      Queue<Runnable> newTaskQueue(int maxCapacity);
35  }