Examples of EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

Package EDU.oswego.cs.dl.util.concurrent

Examples of EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock

EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock
ade lock: rwl.readLock().release(); // must release first to obtain writelock rwl.writeLock().acquire(); if (!cacheValid) { // recheck data = ... cacheValid = true; } // downgrade lock rwl.readLock().acquire(); // reacquire read without giving up lock rwl.writeLock().release(); // release write, still hold read } use(data); rwl.readLock().release(); } }
[ Introduction to this package. ] @see ReentrantLock

      
      this.channelIDManager = channelIDManager;
      
      this.clusterNotifier = clusterNotifier;


      lock = new ReentrantWriterPreferenceReadWriteLock();
       
      waitForBindUnbindLock = new Object();
   }

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        ReadWriteLock lock = (ReadWriteLock) mLocks.get(key);


        if (null == lock)
        {
            lock = new ReentrantWriterPreferenceReadWriteLock();


            mLocks.put(key, lock);
        }


        return lock;

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      this.channelIDManager = channelIDManager;
      
      this.clusterNotifier = clusterNotifier;


      lock = new ReentrantWriterPreferenceReadWriteLock();
       
      waitForBindUnbindLock = new Object();
   }

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      this.channelIDManager = channelIDManager;
      
      this.clusterNotifier = clusterNotifier;


      lock = new ReentrantWriterPreferenceReadWriteLock();
       
      waitForBindUnbindLock = new Object();
   }

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      this.channelIDManager = channelIDManager;
      
      this.clusterNotifier = clusterNotifier;


      lock = new ReentrantWriterPreferenceReadWriteLock();
       
      waitForBindUnbindLock = new Object();
   }

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         throw ex;
   }




   public void testMoreWriteReleasesThanAcquisitions() throws InterruptedException {
      lock=new ReentrantWriterPreferenceReadWriteLock();
      lock.writeLock().acquire();
      lock.writeLock().release();
      lock.writeLock().release();
   }

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      lock.writeLock().release();
      lock.writeLock().release();
   }


   public void testMoreReadReleasesThanAcquisitions() throws InterruptedException {
      lock=new ReentrantWriterPreferenceReadWriteLock();
      lock.readLock().acquire();
      lock.readLock().release();
      try {
         lock.readLock().release();
         fail("read locks cannot be released more than acquired");

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      }
   }


   public void testSimple() throws InterruptedException {
      lock=new ReentrantWriterPreferenceReadWriteLock();
      lock.readLock().acquire();
      lock.readLock().acquire();
      lock.writeLock().acquire();
      lock.writeLock().acquire();
   }

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      lock.writeLock().acquire();
   }




   public void testOneWriterMultipleReaders() throws InterruptedException {
      lock=new ReentrantWriterPreferenceReadWriteLock();


      Writer writer=new Writer("writer");
      Reader reader1=new Reader("reader1");
      Reader reader2=new Reader("reader2");

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      Map distribution = new HashMap();


      Iterator fqnsIterator = fqns.iterator();
      while (fqnsIterator.hasNext())
      {
         ReentrantWriterPreferenceReadWriteLock lock = stripedLock.getLock((Fqn) fqnsIterator.next());
         if (distribution.containsKey(lock))
         {
            int count = ((Integer) distribution.get(lock)).intValue() + 1;
            distribution.put(lock, new Integer(count));
         }

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