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1   package org.apache.maven.surefire.junitcore.pc;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.util.concurrent.atomic.AtomicBoolean;
23  
24  /**
25   * The sequentially executing strategy in private package.
26   *
27   * @author Tibor Digana (tibor17)
28   * @since 2.16
29   *
30   * @see SchedulingStrategy
31   */
32  final class InvokerStrategy extends SchedulingStrategy {
33      private final AtomicBoolean canSchedule = new AtomicBoolean(true);
34  
35      @Override
36      public void schedule(Runnable task) {
37          if (canSchedule()) {
38              task.run();
39          }
40      }
41  
42      @Override
43      protected boolean stop() {
44          return canSchedule.getAndSet(false);
45      }
46  
47      @Override
48      public boolean hasSharedThreadPool() {
49          return false;
50      }
51  
52      @Override
53      public boolean canSchedule() {
54          return canSchedule.get();
55      }
56  
57      @Override
58      public boolean finished() throws InterruptedException {
59          return stop();
60      }
61  }