我有这段代码:
Observable<Contact> phoneContactsObservable = Observable.create(new Observable.OnSubscribe....
ReplaySubject subject = ReplaySubject.create();
phoneContactsObservable.subscribe(subject)
Observable.combineLatest(subject,(PublishSubject<List>) getContacts(), new Func2<....).subscribe()
Observable.combineLatest(subject,(PublishSubject<List>)getFBContacts(), new Func2<....).subscribe()
如果我在getContacts
中出现错误,那么Func2
中的getFBContacts
无法运行,然后我会执行一些方法并希望重新运行此Observables
我该怎么做?
答案 0 :(得分:0)
你有可观察的doOn...
)的钩子 - 比如doOnError
,doOnTerminate
甚至是doOnSubscribe
(我会尝试使用它来永远不会导致误差)。
也就是说,docs中有一个简单的重试延迟模式的例子。请注意,它不会在同一个元素上重试,而是通过重新订阅observable在下一个元素上重试:
Observable.create((Subscriber<? super String> s) -> {
System.out.println("subscribing");
s.onError(new RuntimeException("always fails"));
}).retryWhen(attempts -> {
return attempts.zipWith(Observable.range(1, 3), (n, i) -> i).flatMap(i -> {
System.out.println("delay retry by " + i + " second(s)");
return Observable.timer(i, TimeUnit.SECONDS);
});
}).toBlocking().forEach(System.out::println);
会给:
subscribing
delay retry by 1 second(s)
subscribing
delay retry by 2 second(s)
subscribing
delay retry by 3 second(s)
subscribing