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. ]


    /**
     * Creates a new DynamicPooledExecutor.
     */
    public DynamicPooledExecutor() {
        executor = new PooledExecutor();
        executor.setKeepAliveTime(500);
        adjustPoolSize();
    }

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        if (backLog <= 0) {
            c = new SynchronousChannel();
        } else {
            c = new BoundedLinkedQueue(backLog);
        }
        this.executor = new PooledExecutor(c, poolSize);
        this.executor.setMinimumPoolSize(poolSize);
        this.executor.setBlockedExecutionHandler(
                new PooledExecutor.BlockedExecutionHandler() {
            public boolean blockedAction(Runnable command) {
                // execute with current thread and log message

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    /**
     * Creates a new DynamicPooledExecutor.
     */
    public DynamicPooledExecutor() {
        executor = new PooledExecutor();
        executor.waitWhenBlocked();
        adjustPoolSize();
    }

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

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   /**
    * Creates a new DynamicPooledExecutor.
    */
   public DynamicPooledExecutor()
   {
      executor = new PooledExecutor();
      executor.waitWhenBlocked();
      adjustPoolSize();
   }

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      c = new LinkedQueue();
    } else {
      c = new BoundedBuffer(queueSize);
    }


    pool = new PooledExecutor(c, maxPoolSize);
    pool.setMinimumPoolSize(minPoolSize);
    pool.setKeepAliveTime(1000 * 60 * threadKeepAliveTime);


    workerMap = new HashMap();

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     * one.
     *
     * @param maxSize Maximum size of the work executor pool.
     */
    public WorkExecutorPoolImpl(int maxSize) {
        pooledExecutor = new PooledExecutor(new LinkedQueue(), maxSize);
        pooledExecutor.setMinimumPoolSize(maxSize);
        pooledExecutor.waitWhenBlocked();
    }

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     * @param maxSize Maximum size of the work executor pool.
     */
    public WorkExecutorPoolImpl(
            Channel channel,
            int maxSize) {
        pooledExecutor = new PooledExecutor(channel, maxSize);
        pooledExecutor.setMinimumPoolSize(maxSize);
        pooledExecutor.waitWhenBlocked();
    }

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     */
    synchronized public Executor getWorkManager() {
        if (workManager != null)
            return workManager;


        PooledExecutor p = new PooledExecutor();
        p.setKeepAliveTime(1000 * 30);
        p.setMinimumPoolSize(5);
        p.setMaximumPoolSize(Integer.MAX_VALUE);
        p.setThreadFactory(new ThreadFactory() {
            public Thread newThread(Runnable arg0) {
                return new Thread(arg0, "Remoting 'async' protocol worker " + getNextWorkerID());
            }
        });

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    private int getNextWorkerID() {
        return nextWorkerID++;
    }


    public void doStart() throws WaitingException, Exception {
        PooledExecutor p = new PooledExecutor(new LinkedQueue(), poolSize);
        p.setKeepAliveTime(keepAliveTime);
        p.setMinimumPoolSize(poolSize);
        p.setThreadFactory(new ThreadFactory() {
            public Thread newThread(Runnable arg0) {
                return new Thread(arg0, poolName + " " + getNextWorkerID());
            }
        });

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