1 /*
2 * Copyright 2013 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
20 /**
21 * {@link Executor} which execute tasks in the callers thread.
22 */
23 public final class ImmediateExecutor implements Executor {
24 public static final ImmediateExecutor INSTANCE = new ImmediateExecutor();
25
26 private ImmediateExecutor() {
27 // use static instance
28 }
29
30 @Override
31 public void execute(Runnable command) {
32 if (command == null) {
33 throw new NullPointerException("command");
34 }
35 command.run();
36 }
37 }