package org.apache.maven.surefire.junitcore.pc;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import java.util.concurrent.CancellationException;

 import java.util.concurrent.ConcurrentLinkedQueue;

 import java.util.concurrent.ExecutionException;

 import java.util.concurrent.ExecutorService;

 import java.util.concurrent.Future;

 /**

  * Parallel strategy for shared thread pool in private package.

  *

  * @author Tibor Digana (tibor17)

  * @since 2.16

  *

  * @see AbstractThreadPoolStrategy

  */

 final class SharedThreadPoolStrategy extends AbstractThreadPoolStrategy {

     SharedThreadPoolStrategy(ExecutorService threadPool) {

         super(threadPool, new ConcurrentLinkedQueue<Future<?>>());

     }

     @Override

     public boolean hasSharedThreadPool() {

         return true;

     }

     @Override

     public boolean finished() throws InterruptedException {

         boolean wasRunningAll = canSchedule();

         for (Future<?> futureResult : getFutureResults()) {

             try {

                 futureResult.get();

             } catch (InterruptedException e) {

                 // after called external ExecutorService#shutdownNow()

                 // or ExecutorService#shutdown()

                 wasRunningAll = false;

             } catch (ExecutionException e) {

                 // test throws exception

             } catch (CancellationException e) {

                 // cannot happen because not calling Future#cancel()

             }

         }

         disable();

         return wasRunningAll;

     }

     @Override

     protected final boolean stop() {

         return stop(false);

     }

     @Override

     protected final boolean stopNow() {

         return stop(true);

     }

     private boolean stop(boolean interrupt) {

         final boolean wasRunning = canSchedule();

         for (Future<?> futureResult : getFutureResults()) {

             futureResult.cancel(interrupt);

         }

         disable();

         return wasRunning;

     }

 }