/**
* Constructs a thread-pool stage.
*
* @param name the stage name
* @param handler the event handler to execute
* @param executor the external executor service provided for consistent tracking, it is
* recommended to create executor with {@link DefaultThreadFactory}
* @param errorHandler the error handler
*/
@Inject
public ThreadPoolStage(
@Parameter(StageName.class) final String name,
@Parameter(StageHandler.class) final EventHandler<T> handler,
@Parameter(StageExecutorService.class) final ExecutorService executor,
@Parameter(ErrorHandler.class) final EventHandler<Throwable> errorHandler) {
super(name);
this.handler = handler;
this.errorHandler = errorHandler;
this.numThreads = 0;
this.executor = executor;
StageManager.instance().register(this);
}
/**
* Constructs a single thread stage.
*
* @param name the stage name
* @param handler the event handler to execute
* @param capacity the queue capacity
*/
@Inject
public SingleThreadStage(
@Parameter(StageName.class) final String name,
@Parameter(StageHandler.class) final EventHandler<T> handler,
@Parameter(Capacity.class) final int capacity) {
super(name);
queue = new ArrayBlockingQueue<T>(capacity);
interrupted = new AtomicBoolean(false);
thread = new Thread(new Producer<T>(name, queue, handler, interrupted));
thread.setName("SingleThreadStage<" + name + ">");
thread.start();
StageManager.instance().register(this);
}
/**
* Constructs a thread-pool stage.
*
* @param name the stage name
* @param handler the event handler to execute
* @param numThreads the number of threads to use
* @param errorHandler the error handler
* @throws WakeRuntimeException
*/
@Inject
public ThreadPoolStage(
@Parameter(StageName.class) final String name,
@Parameter(StageHandler.class) final EventHandler<T> handler,
@Parameter(NumberOfThreads.class) final int numThreads,
@Parameter(ErrorHandler.class) final EventHandler<Throwable> errorHandler) {
super(name);
this.handler = handler;
this.errorHandler = errorHandler;
if (numThreads <= 0) {
throw new WakeRuntimeException(
name + " numThreads " + numThreads + " is less than or equal to 0");
}
this.numThreads = numThreads;
this.executor = Executors.newFixedThreadPool(numThreads, new DefaultThreadFactory(name));
StageManager.instance().register(this);
}
