Examples of java.util.concurrent.ConcurrentHashMap.keySet()

Class java.util.concurrent.ConcurrentHashMap

Examples of java.util.concurrent.ConcurrentHashMap.keySet()

java.util.concurrent.ConcurrentHashMap.keySet()
Returns a set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from this map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations. The returned iterator is a "weakly consistent" iterator that will never throw {@link java.util.ConcurrentModificationException}, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction. @return a set view of the keys contained in this map.

          field.setAccessible(true);
          final Object object = field.get(javaSupport);
          if(object instanceof ConcurrentHashMap)
          {
            ConcurrentHashMap classCache = (ConcurrentHashMap) object;
            for(Object classObject : classCache.keySet())
            {
              Class aClass = (Class)classObject;
              if(aClass.toString().startsWith("class $Proxy"))
                classCache.remove(aClass);
            }

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      Thread.sleep(500);
      sleptSoFar += 500;
      if(sleptSoFar > 5000) {
        throw new RuntimeException("Waited too much");
      }
    } while(map.keySet().size() < N_THREADS);
    
    Set<Integer> distinctPorts = new HashSet<Integer>();
    for(Object entry: map.entrySet()) {
      PortLock pLock = (PortLock)((Map.Entry)entry).getValue();
      distinctPorts.add(pLock.getPort());

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      distinctPorts.add(pLock.getPort());
      pLock.release();
    }
    
    // Assert every thread locked on a different port
    assertEquals(distinctPorts.size(), map.keySet().size());
  }
  
  @Test
  public void test() throws ClassNotFoundException, SQLException, IOException, InterruptedException {
    EmbeddedMySQL mysql = new EmbeddedMySQL();

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        ConcurrentHashMap map = (ConcurrentHashMap) properties.get(null);
        if (map == null)
            return;


        Iterator<Class> itor = map.keySet().iterator();
        while (itor.hasNext())
        {
            Class clazz = itor.next();
            LOG.debug("Clazz: "+clazz+" loaded by "+clazz.getClassLoader());
            if (Thread.currentThread().getContextClassLoader().equals(clazz.getClassLoader()))

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