io.airlift.concurrent

Class AsyncSemaphore<T>

java.lang.Object

io.airlift.concurrent.AsyncSemaphore<T>

@ThreadSafe
public class AsyncSemaphore<T>
extends Object

Guarantees that no more than maxPermits of tasks will be run concurrently. The class will rely on the ListenableFuture returned by the submitter function to determine when a task has been completed. The submitter function NEEDS to be thread-safe and is recommended to do the bulk of its work asynchronously.

Constructor Summary

Constructors

Constructor and Description
AsyncSemaphore(int maxPermits, Executor submitExecutor, com.google.common.base.Function<T,com.google.common.util.concurrent.ListenableFuture<?>> submitter)

Method Summary

Modifier and Type	Method and Description
com.google.common.util.concurrent.ListenableFuture<?>	submit(T task)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AsyncSemaphore

public AsyncSemaphore(int maxPermits,
                      Executor submitExecutor,
                      com.google.common.base.Function<T,com.google.common.util.concurrent.ListenableFuture<?>> submitter)

Method Detail

submit

public com.google.common.util.concurrent.ListenableFuture<?> submit(T task)