/**
* Slice this buffer at the given positions. Useful for extracting multiple segments of data from
* a buffer when the exact indices of that data is already known.
*
* @param positions The start and end positions of the slices.
* @return A list of {@link View Views} pointing to the slices.
*/
public List<View> slice(int... positions) {
Assert.notNull(positions, "Positions cannot be null.");
if (positions.length == 0) {
return Collections.emptyList();
}
snapshot();
List<View> views = new ArrayList<View>();
int len = positions.length;
for (int i = 0; i < len; i++) {
int start = positions[i];
int end = (i + 1 < len ? positions[++i] : this.limit);
views.add(createView(start, end));
reset();
}
return views;
}
@Test
public void indexBugTest() throws InterruptedException {
int numOfItems = 20;
// this line causes an java.lang.ArrayIndexOutOfBoundsException unless there is a break point in
// ZipAction
// .createSubscriber()
RingBufferProcessor<String> ring = RingBufferProcessor.create("test", 1024);
// this line works
// Broadcaster<String> ring = Broadcaster.create(Environment.get());
Stream<String> stream = Streams.wrap(ring.start());
Stream<String> stream2 =
stream
.zipWith(
Streams.createWith(
(d, s) -> {
for (int i = 0; i < d; i++) {
s.onNext(System.currentTimeMillis());
}
}),
t -> String.format("%s : %s", t.getT2(), t.getT1()))
.observeError(
Throwable.class,
(o, t) -> {
System.err.println(t.toString());
t.printStackTrace();
});
Promise<List<String>> p = stream2.observe(System.out::println).buffer(numOfItems).next();
for (int curr = 0; curr < numOfItems; curr++) {
if (curr % 5 == 0 && curr % 3 == 0) ring.onNext("FizBuz");
else if (curr % 3 == 0) ring.onNext("Fiz");
else if (curr % 5 == 0) ring.onNext("Buz");
else ring.onNext(String.valueOf(curr));
}
Assert.isTrue(p.await(5, TimeUnit.SECONDS) != null, "Has not returned list");
}
/**
* Creates a new {@code NotifyConsumer} that will notify the given {@code observable} using the
* given {@code notifyKey}. If {@code notifyKey} is {@code null}, {@code observable} will be
* notified without a key.
*
* @param notifyKey The notification key, may be {@code null}
* @param observable The observable to notify. May not be {@code null}
*/
public NotifyConsumer(Object notifyKey, Bus<?, ?> observable) {
Assert.notNull(observable, "Observable cannot be null.");
this.notifyKey = notifyKey;
this.observable = observable;
this.wrapEvent = EventBus.class.isAssignableFrom(observable.getClass());
}
