fork-join

A thread starvation deadlock occurs in a normal thread pool if all the threads in the pool are waiting for queued tasks in the same pool to complete. ForkJoinPool avoids this problem by stealing work from other threads from inside the join() call, rather than simply waiting. For example: private static class ForkableTask extends RecursiveTask<Integer> { private final CyclicBarrier barrier; ForkableTask(CyclicBarrier barrier) { this.barrier = barrier; } @Override protected Integer compute() { try { barrier.await(); return 1; } catch (InterruptedException | BrokenBarrierException e) { throw new

Here's my understanding of the Stream framework of Java 8: Something creates a source Stream The implementation is responsible for providing a BaseStream#parallel() method, which in turns returns a Stream that can run it's operations in parallel. While someone has already found a way to use a custom thread pool with Stream framework's parallel executions, I cannot for the life of me find any mention in the Java 8 API that the default Java 8 parallel Stream implementations would use ForkJoinPool#commonPool() . ( Collection#parallelStream() , the methods in StreamSupport class, and others

As I understand jdk7 has the support for fork-and-join, Can I use fork-and-join in JDK6 without upgraging to JDK7.0? Yup, see here - the package you want is jsr166y. 来源： https://stackoverflow.com/questions/8205874/use-fork-and-join-in-jdk6

I'm comparing two variations on a test program. Both are operating with a 4-thread ForkJoinPool on a machine with four cores. In 'mode 1', I use the pool very much like an executor service. I toss a pile of tasks into ExecutorService.invokeAll . I get better performance than from an ordinary fixed thread executor service (even though there are calls to Lucene, that do some I/O, in there). There is no divide-and-conquer here. Literally, I do ExecutorService es = new ForkJoinPool(4); es.invokeAll(collection_of_Callables); In 'mode 2', I submit a single task to the pool, and in that task call

In the Observables forkJoin documentation, it says that args can be an array but it doesn't list an example doing so: https://github.com/Reactive-Extensions/RxJS/blob/master/doc/api/core/operators/forkjoin.md I have tried a function similar to what I listed (below) but came up with an error: :3000/angular2/src/platform/browser/browser_adapter.js:76 EXCEPTION: TypeError: Observable_1.Observable.forkJoin is not a function A sheared version of my function below: processStuff( inputObject ) { let _self = this; return new Observable(function(observer) { let observableBatch = []; inputObject.forEach