Class DefaultSubscriber<T>

java.lang.Object
io.reactivex.rxjava4.subscribers.DefaultSubscriber<T>
Type Parameters:
T - the value type

Example

Flowable.range(1, 5)
    .subscribe(new DefaultSubscriber<Integer>() {
        @Override public void onStart() {
            System.out.println("Start!");
            request(1);
        }
        @Override public void onNext(Integer t) {
            if (t == 3) {
                cancel();
            }
            System.out.println(t);
            request(1);
        }
        @Override public void onError(Throwable t) {
            t.printStackTrace();
        }
        @Override public void onComplete() {
            System.out.println("Done!");
        }
    });
All Implemented Interfaces:
FlowableSubscriber<T>, Flow.Subscriber<T>
public abstract class DefaultSubscriber<T> extends Object implements FlowableSubscriber<T>
Abstract base implementation of a
invalid reference 
Subscriber
with support for requesting via request(long), cancelling via via cancel() (both synchronously) and calls onStart() when the subscription happens.

All pre-implemented final methods are thread-safe.

The default onStart() requests Long.MAX_VALUE by default. Override the method to request a custom positive amount.

Note that calling request(long) from onStart() may trigger an immediate, asynchronous emission of data to Flow.Subscriber.onNext(Object). Make sure all initialization happens before the call to request() in onStart(). Calling request(long) inside Flow.Subscriber.onNext(Object) can happen at any time because by design, onNext calls from upstream are non-reentrant and non-overlapping.

Use the protected cancel() to cancel the sequence from within an onNext implementation.

Like all other consumers, DefaultSubscriber can be subscribed only once. Any subsequent attempt to subscribe it to a new source will yield an IllegalStateException with message "It is not allowed to subscribe with a(n) <class name> multiple times.".

Implementation of onStart(), Flow.Subscriber.onNext(Object), Flow.Subscriber.onError(Throwable) and Flow.Subscriber.onComplete() are not allowed to throw any unchecked exceptions. If for some reason this can't be avoided, use Flowable.safeSubscribe(org.reactivestreams.Subscriber) instead of the standard subscribe() method.

  • Constructor Details

    • DefaultSubscriber

      public DefaultSubscriber()

  • Method Details