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

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

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

EDU.oswego.cs.dl.util.concurrent.PooledExecutor
ialize to use a maximum of 8 threads. static PooledExecutor pool = new PooledExecutor(8); } Here are some sample variants in initialization:
1. Using a bounded buffer of 10 tasks, at least 4 threads (started only when needed due to incoming requests), but allowing up to 100 threads if the buffer gets full.
```
 pool = new PooledExecutor(new BoundedBuffer(10), 100); pool.setMinimumPoolSize(4); 
```
2. Same as (1), except pre-start 9 threads, allowing them to die if they are not used for five minutes.
```
 pool = new PooledExecutor(new BoundedBuffer(10), 100); pool.setMinimumPoolSize(4); pool.setKeepAliveTime(1000 * 60 * 5); pool.createThreads(9); 
```
3. Same as (2) except clients block if both the buffer is full and all 100 threads are busy:
```
 pool = new PooledExecutor(new BoundedBuffer(10), 100); pool.setMinimumPoolSize(4); pool.setKeepAliveTime(1000 * 60 * 5); pool.waitWhenBlocked(); pool.createThreads(9); 
```
4. An unbounded queue serviced by exactly 5 threads:
```
 pool = new PooledExecutor(new LinkedQueue()); pool.setKeepAliveTime(-1); // live forever pool.createThreads(5); 
```
Usage notes.
Pools do not mesh well with using thread-specific storage via java.lang.ThreadLocal. ThreadLocal relies on the identity of a thread executing a particular task. Pools use the same thread to perform different tasks.
If you need a policy not handled by the parameters in this class consider writing a subclass.
Version note: Previous versions of this class relied on ThreadGroups for aggregate control. This has been removed, and the method interruptAll added, to avoid differences in behavior across JVMs.
[ Introduction to this package. ]

                    if (closed.get()) {
                        socket.close();
                    }
                    else {
                        // have thread per channel for sending messages and a thread for receiving them
                        PooledExecutor executor = null;
                        if (useAsyncSend) {
                            executor = new PooledExecutor(new BoundedBuffer(maxOutstandingMessages), 1);
                            executor.waitWhenBlocked();
                            executor.setKeepAliveTime(1000);
                        }
                        TcpTransportChannel channel = createTransportChannel(socket, executor);
                        addClient(channel);
                    }
                }

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     */    
     public void setUseAsyncSend(boolean useAsyncSend) {
        this.useAsyncSend = useAsyncSend;
        try {
            if (useAsyncSend && executor==null ) {
                PooledExecutor pe = new PooledExecutor(new BoundedBuffer(10), 1);
                pe.waitWhenBlocked();
                pe.setKeepAliveTime(1000);
                executor = pe;
            }
            else if (!useAsyncSend && executor != null) {
                stopExecutor(executor);
            }

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        this.destinations = new ConcurrentHashMap();
        this.subscriptions = new ConcurrentHashMap();
        this.filterFactory = new FilterFactoryImpl();
        this.started = new SynchronizedBoolean(false);
        this.doingGarbageCollection = new SynchronizedBoolean(false);
        this.threadPool = new PooledExecutor();
        this.threadPool.setThreadFactory(new TransientQueueThreadFactory());
        this.inactiveTimeout = DEFAULT_INACTIVE_TIMEOUT;
        this.garbageCoolectionCapacityLimit = DEFAULT_GARBAGE_COLLECTION_CAPACITY_LIMIT;
    }

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        this.destinations = new ConcurrentHashMap();
        this.subscriptions = new ConcurrentHashMap();
        this.filterFactory = new FilterFactoryImpl();
        this.started = new SynchronizedBoolean(false);
        this.doingGarbageCollection = new SynchronizedBoolean(false);
        this.threadPool = new PooledExecutor();
        this.threadPool.setThreadFactory(new DurableQueueThreadFactory());
        this.inactiveTimeout = DEFAULT_INACTIVE_TIMEOUT;
        this.garbageCoolectionCapacityLimit = DEFAULT_GARBAGE_COLLECTION_CAPACITY_LIMIT;
    }

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    private ActiveMQPrefetchPolicy remotePrefetchPolicy = new ActiveMQPrefetchPolicy();




    public NetworkConnector(BrokerContainer brokerContainer) {
        this.brokerContainer = brokerContainer;
        this.threadPool = new PooledExecutor();
    }

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            this(objectListener, 10);
        }


        public ObjectDispatcher(AsynchWriteAsynchChannelAdapter objectListener, int queueSize) {
            this.objectListener = objectListener;
            executor = new PooledExecutor(new BoundedBuffer(queueSize), 1);
            executor.waitWhenBlocked();
        }

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        final boolean useQueueing = poolConfig.getChild("use-queueing").getValueAsBoolean(false);
        final int queueSize = poolConfig.getChild("queue-size").getValueAsInteger(-1);


        if (useQueueing) {
            if (queueSize > 0) {
                m_executor = new PooledExecutor(new BoundedBuffer(queueSize));
            } else {
                m_executor = new PooledExecutor(new LinkedQueue());
            }
        } else {
            m_executor = new PooledExecutor();
        }


        final int maxPoolSize = poolConfig.getChild("max-pool-size").getValueAsInteger(-1);


        if (maxPoolSize > 0) {

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    public ThreadManagerImpl() {
        
        log.info("Intializing Thread Manager");
        
        backgroundExecutor = new PooledExecutor(new BoundedBuffer(10), 25);
        backgroundExecutor.setMinimumPoolSize(4);
        backgroundExecutor.setKeepAliveTime(1000 * 60 * 5);
        backgroundExecutor.waitWhenBlocked();
        backgroundExecutor.createThreads(9);

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        started = new SynchronizedBoolean(false);
        // there's not much point logging all exceptions, lets just keep a few around
        exceptionsList = new BoundedLinkedQueue(10);
        outboundLock = new Object();
        if (useAsyncSend) {
            executor = new PooledExecutor(new BoundedBuffer(1000), 1);
        }
        super.setCachingEnabled(true);
    }

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        this.destinations = new ConcurrentHashMap();
        this.subscriptions = new ConcurrentHashMap();
        this.filterFactory = new FilterFactoryImpl();
        this.started = new SynchronizedBoolean(false);
        this.doingGarbageCollection = new SynchronizedBoolean(false);
        this.threadPool = new PooledExecutor();
        this.threadPool.setThreadFactory(new TransientQueueThreadFactory());
        this.inactiveTimeout = DEFAULT_INACTIVE_TIMEOUT;
        this.garbageCoolectionCapacityLimit = DEFAULT_GARBAGE_COLLECTION_CAPACITY_LIMIT;
    }

View Full Code Here

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Related Classes of EDU.oswego.cs.dl.util.concurrent.PooledExecutor

examples.util.concurrent.AsynchronousManager

org.activeio.adapter.AsynchWriteAsynchChannelAdapter$ObjectDispatcher

org.activemq.service.AsyncSimpleBrokerTest

org.activemq.service.boundedvm.DurableQueueBoundedMessageManager

org.activemq.service.boundedvm.TransientQueueBoundedMessageManager

org.activemq.transport.jgroups.JGroupsTransportChannel

org.activemq.transport.NetworkConnector

org.activemq.transport.tcp.TcpTransportChannel

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