package com.github.benjchristensen.gist;
import java.util.concurrent.TimeUnit;
import rx.Observable;
import rx.Subscriber;
import rx.schedulers.Schedulers;
public class WindowExample {
public static void main(String args[]) {
// buffer every 500ms (using 999999999 to mark start of output)
hotStream().window(500, TimeUnit.MILLISECONDS).take(10).flatMap(w -> w.startWith(999999999)).toBlocking().forEach(System.out::println);
// buffer 10 items at a time (using 999999999 to mark start of output)
hotStream().window(10).take(10).flatMap(w -> w.startWith(999999999)).toBlocking().forEach(System.out::println);
}
/**
* This is an artificial source to demonstrate an infinite stream that bursts intermittently
*/
public static Observable<Integer> hotStream() {
return Observable.create((Subscriber<? super Integer> s) -> {
while (!s.isUnsubscribed()) {
// burst some number of items
for (int i = 0; i < Math.random() * 20; i++) {
s.onNext(i);
}
try {
// sleep for a random amount of time
// NOTE: Only using Thread.sleep here as an artificial demo.
Thread.sleep((long) (Math.random() * 1000));
} catch (Exception e) {
// do nothing
}
}
}).subscribeOn(Schedulers.newThread()); // use newThread since we are using sleep to block
}
}