package org.apache.maven.surefire.junitcore;
   
   /*
    * 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.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  import org.apache.maven.surefire.util.NestedRuntimeException;
  
  import org.junit.runners.model.RunnerScheduler;
  
  /**
   * @author <a href="mailto:kristian@zenior.no">Kristian Rosenvold</a>
   */
  public class AsynchronousRunner
      implements RunnerScheduler
  {
      private final List<Future<Object>> futures = Collections.synchronizedList( new ArrayList<Future<Object>>() );
  
      private final ExecutorService fService;
  
      public AsynchronousRunner( ExecutorService fService )
      {
          this.fService = fService;
      }
  
      public void schedule( final Runnable childStatement )
      {
          futures.add( fService.submit( Executors.callable( childStatement ) ) );
      }
  
  
      public void finished()
      {
          try
          {
              waitForCompletion();
          }
          catch ( ExecutionException e )
          {
              throw new NestedRuntimeException( e );
          }
      }
  
      public void waitForCompletion()
          throws ExecutionException
      {
          for ( Future<Object> each : futures )
          {
              try
              {
                  each.get();
              }
              catch ( InterruptedException e )
              {
                  throw new NestedRuntimeException( e );
              }
          }
      }
  }