View Javadoc
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.Executor;
19  import java.util.concurrent.ThreadFactory;
20  
21  /**
22   * Default {@link SingleThreadEventExecutor} implementation which just execute all submitted task in a
23   * serial fashion.
24   */
25  public final class DefaultEventExecutor extends SingleThreadEventExecutor {
26  
27      public DefaultEventExecutor() {
28          this((EventExecutorGroup) null);
29      }
30  
31      public DefaultEventExecutor(ThreadFactory threadFactory) {
32          this(null, threadFactory);
33      }
34  
35      public DefaultEventExecutor(Executor executor) {
36          this(null, executor);
37      }
38  
39      public DefaultEventExecutor(EventExecutorGroup parent) {
40          this(parent, new DefaultThreadFactory(DefaultEventExecutor.class));
41      }
42  
43      public DefaultEventExecutor(EventExecutorGroup parent, ThreadFactory threadFactory) {
44          super(parent, threadFactory, true);
45      }
46  
47      public DefaultEventExecutor(EventExecutorGroup parent, Executor executor) {
48          super(parent, executor, true);
49      }
50  
51      public DefaultEventExecutor(EventExecutorGroup parent, ThreadFactory threadFactory, int maxPendingTasks,
52                                  RejectedExecutionHandler rejectedExecutionHandler) {
53          super(parent, threadFactory, true, maxPendingTasks, rejectedExecutionHandler);
54      }
55  
56      public DefaultEventExecutor(EventExecutorGroup parent, Executor executor, int maxPendingTasks,
57                                  RejectedExecutionHandler rejectedExecutionHandler) {
58          super(parent, executor, true, maxPendingTasks, rejectedExecutionHandler);
59      }
60  
61      @Override
62      protected void run() {
63          for (;;) {
64              Runnable task = takeTask();
65              if (task != null) {
66                  task.run();
67                  updateLastExecutionTime();
68              }
69  
70              if (confirmShutdown()) {
71                  break;
72              }
73          }
74      }
75  }