com.github.mizool.core.concurrent

Class BufferedStreamAdapter<V>

java.lang.Object

com.github.mizool.core.concurrent.BufferedStreamAdapter<V>

public class BufferedStreamAdapter<V>
extends Object

Buffers a Stream of ListenableFutures and provides the results as a new Stream.

Futures are collected as fast as possible without the sum of concurrently running futures and available results exceeding bufferSize.
The new stream contains the results in the completion order of the futures. It blocks while no results are available and there are still futures to wait for.
Any Throwable thrown by one of the incoming futures is wrapped in an UncheckedExecutionException and thrown while supplying the new stream with values.

This buffer is intended to be used like so:

 Stream<ListenableFuture<V>> futureStream;
 Stream<V> resultStream = BufferedStreamAdapter.adapt(futureStream, bufferSize, executorService);

Method Summary

Modifier and Type	Method and Description
static <V> Stream<V>	adapt(Stream<com.google.common.util.concurrent.ListenableFuture<V>> futures, int bufferSize, ExecutorService executorService)

Methods inherited from class java.lang.Object

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

Method Detail

adapt

public static <V> Stream<V> adapt(Stream<com.google.common.util.concurrent.ListenableFuture<V>> futures,
                                  int bufferSize,
                                  ExecutorService executorService)