1 /*
2 * JBoss, Home of Professional Open Source.
3 * Copyright 2017 Red Hat, Inc., and individual contributors
4 * as indicated by the @author tags.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package org.jboss.threads;
20
21 import java.util.concurrent.ExecutorService;
22 import java.util.concurrent.TimeUnit;
23 import java.util.concurrent.AbstractExecutorService;
24 import java.util.concurrent.Executor;
25 import java.util.List;
26
27 /**
28 * An implementation of {@code ExecutorService} that delegates to the real executor, while disallowing termination.
29 */
30 class DelegatingExecutorService extends AbstractExecutorService implements ExecutorService {
31 private final Executor delegate;
32
33 DelegatingExecutorService(final Executor delegate) {
34 this.delegate = delegate;
35 }
36
37 public void execute(final Runnable command) {
38 delegate.execute(command);
39 }
40
41 public boolean isShutdown() {
42 // container managed executors are never shut down from the application's perspective
43 return false;
44 }
45
46 public boolean isTerminated() {
47 // container managed executors are never shut down from the application's perspective
48 return false;
49 }
50
51 public boolean awaitTermination(final long timeout, final TimeUnit unit) throws InterruptedException {
52 return false;
53 }
54
55 public void shutdown() {
56 throw Messages.msg.notAllowedContainerManaged("shutdown");
57 }
58
59 public List<Runnable> shutdownNow() {
60 throw Messages.msg.notAllowedContainerManaged("shutdownNow");
61 }
62
63 public String toString() {
64 return String.format("%s -> %s", super.toString(), delegate);
65 }
66 }
67