package org.eclipse.aether.named.hazelcast;
   
   /*
    * 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.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import org.eclipse.aether.named.NamedLock;
  import org.eclipse.aether.named.NamedLockFactory;
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TestName;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.is;
  import static org.hamcrest.Matchers.not;
  import static org.hamcrest.Matchers.sameInstance;
  
  /**
   * UT support for {@link NamedLockFactory}.
   */
  public abstract class NamedLockFactoryTestSupport
  {
      protected static final HazelcastClientUtils utils = new HazelcastClientUtils();
  
      protected static NamedLockFactory namedLockFactory;
  
      @Rule
      public TestName testName = new TestName();
  
      @AfterClass
      public static void cleanup()
      {
          if ( namedLockFactory != null )
          {
              namedLockFactory.shutdown();
          }
          utils.cleanup();
      }
  
      @Test
      public void refCounting()
      {
          final String name = testName.getMethodName();
          try ( NamedLock one = namedLockFactory.getLock( name );
                NamedLock two = namedLockFactory.getLock( name ) )
          {
              assertThat( one, sameInstance( two ) );
              one.close();
              two.close();
  
              try ( NamedLock three = namedLockFactory.getLock( name ) )
              {
                  assertThat( three, not( sameInstance( two ) ) );
              }
          }
      }
  
      @Test( expected = IllegalStateException.class )
      public void unlockWoLock()
      {
          final String name = testName.getMethodName();
          try ( NamedLock one = namedLockFactory.getLock( name ) )
          {
              one.unlock();
          }
      }
  
      @Test
      public void wwBoxing() throws InterruptedException
      {
          final String name = testName.getMethodName();
          try ( NamedLock one = namedLockFactory.getLock( name ) )
          {
              assertThat( one.lockExclusively( 1L, TimeUnit.MILLISECONDS ), is( true ) );
              assertThat( one.lockExclusively( 1L, TimeUnit.MILLISECONDS ), is( true ) );
              one.unlock();
              one.unlock();
          }
      }
 
     @Test
     public void rrBoxing() throws InterruptedException
     {
         final String name = testName.getMethodName();
         try ( NamedLock one = namedLockFactory.getLock( name ) )
         {
             assertThat( one.lockShared( 1L, TimeUnit.MILLISECONDS ), is( true ) );
             assertThat( one.lockShared( 1L, TimeUnit.MILLISECONDS ), is( true ) );
             one.unlock();
             one.unlock();
         }
     }
 
     @Test
     public void wrBoxing() throws InterruptedException
     {
         final String name = testName.getMethodName();
         try ( NamedLock one = namedLockFactory.getLock( name ) )
         {
             assertThat( one.lockExclusively( 1L, TimeUnit.MILLISECONDS ), is( true ) );
             assertThat( one.lockShared( 1L, TimeUnit.MILLISECONDS ), is( true ) );
             one.unlock();
             one.unlock();
         }
     }
 
     @Test
     public void rwBoxing() throws InterruptedException
     {
         final String name = testName.getMethodName();
         try ( NamedLock one = namedLockFactory.getLock( name ) )
         {
             assertThat( one.lockShared( 1L, TimeUnit.MILLISECONDS ), is( true ) );
             assertThat( one.lockExclusively( 1L, TimeUnit.MILLISECONDS ), is( false ) );
             one.unlock();
         }
     }
 
     @Test( timeout = 5000 )
     public void sharedAccess() throws InterruptedException
     {
         final String name = testName.getMethodName();
         CountDownLatch winners = new CountDownLatch( 2 ); // we expect 2 winner
         CountDownLatch losers = new CountDownLatch( 0 ); // we expect 0 loser
         Thread t1 = new Thread( new Access( namedLockFactory, name, true, winners, losers ) );
         Thread t2 = new Thread( new Access( namedLockFactory, name, true, winners, losers ) );
         t1.start();
         t2.start();
         t1.join();
         t2.join();
         winners.await();
         losers.await();
     }
 
     @Test( timeout = 5000 )
     public void exclusiveAccess() throws InterruptedException
     {
         final String name = testName.getMethodName();
         CountDownLatch winners = new CountDownLatch( 1 ); // we expect 1 winner
         CountDownLatch losers = new CountDownLatch( 1 ); // we expect 1 loser
         Thread t1 = new Thread( new Access( namedLockFactory, name, false, winners, losers ) );
         Thread t2 = new Thread( new Access( namedLockFactory, name, false, winners, losers ) );
         t1.start();
         t2.start();
         t1.join();
         t2.join();
         winners.await();
         losers.await();
     }
 
     @Test( timeout = 5000 )
     public void mixedAccess() throws InterruptedException
     {
         final String name = testName.getMethodName();
         CountDownLatch winners = new CountDownLatch( 1 ); // we expect 1 winner
         CountDownLatch losers = new CountDownLatch( 1 ); // we expect 1 loser
         Thread t1 = new Thread( new Access( namedLockFactory, name, true, winners, losers ) );
         Thread t2 = new Thread( new Access( namedLockFactory, name, false, winners, losers ) );
         t1.start();
         t2.start();
         t1.join();
         t2.join();
         winners.await();
         losers.await();
     }
 
     private static class Access implements Runnable
     {
         final NamedLockFactory namedLockFactory;
         final String name;
         final boolean shared;
         final CountDownLatch winner;
         final CountDownLatch loser;
 
         public Access( NamedLockFactory namedLockFactory,
                        String name,
                        boolean shared,
                        CountDownLatch winner,
                        CountDownLatch loser )
         {
             this.namedLockFactory = namedLockFactory;
             this.name = name;
             this.shared = shared;
             this.winner = winner;
             this.loser = loser;
         }
 
         @Override
         public void run()
         {
             try ( NamedLock lock = namedLockFactory.getLock( name ) )
             {
                 if ( shared ? lock.lockShared( 100L, TimeUnit.MILLISECONDS ) :
                         lock.lockExclusively( 100L, TimeUnit.MILLISECONDS ) )
                 {
                     try
                     {
                         winner.countDown();
                         loser.await();
                     }
                     finally
                     {
                         lock.unlock();
                     }
                 }
                 else
                 {
                     loser.countDown();
                     winner.await();
                 }
             }
             catch ( InterruptedException e )
             {
                 Assert.fail( e.getMessage() );
             }
         }
     }
 }