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1   /*
2    * Copyright 2012 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    *   http://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.util.concurrent;
17  
18  import java.util.concurrent.ThreadFactory;
19  
20  /**
21   * Default implementation of {@link MultithreadEventExecutorGroup} which will use {@link DefaultEventExecutor} instances
22   * to handle the tasks.
23   */
24  public class DefaultEventExecutorGroup extends MultithreadEventExecutorGroup {
25      /**
26       * @see #DefaultEventExecutorGroup(int, ThreadFactory)
27       */
28      public DefaultEventExecutorGroup(int nThreads) {
29          this(nThreads, null);
30      }
31  
32      /**
33       * Create a new instance.
34       *
35       * @param nThreads          the number of threads that will be used by this instance.
36       * @param threadFactory     the ThreadFactory to use, or {@code null} if the default should be used.
37       */
38      public DefaultEventExecutorGroup(int nThreads, ThreadFactory threadFactory) {
39          this(nThreads, threadFactory, SingleThreadEventExecutor.DEFAULT_MAX_PENDING_EXECUTOR_TASKS,
40                  RejectedExecutionHandlers.reject());
41      }
42  
43      /**
44       * Create a new instance.
45       *
46       * @param nThreads          the number of threads that will be used by this instance.
47       * @param threadFactory     the ThreadFactory to use, or {@code null} if the default should be used.
48       * @param maxPendingTasks   the maximum number of pending tasks before new tasks will be rejected.
49       * @param rejectedHandler   the {@link RejectedExecutionHandler} to use.
50       */
51      public DefaultEventExecutorGroup(int nThreads, ThreadFactory threadFactory, int maxPendingTasks,
52                                       RejectedExecutionHandler rejectedHandler) {
53          super(nThreads, threadFactory, maxPendingTasks, rejectedHandler);
54      }
55  
56      @Override
57      protected EventExecutor newChild(ThreadFactory threadFactory, Object... args) throws Exception {
58          return new DefaultEventExecutor(this, threadFactory, (Integer) args[0], (RejectedExecutionHandler) args[1]);
59      }
60  }