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Reactive Extensions for Java
/**
* Copyright (c) 2016-present, RxJava Contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
* the License for the specific language governing permissions and limitations under the License.
*/
package io.reactivex.internal.operators.observable;
import io.reactivex.*;
import io.reactivex.annotations.Experimental;
import io.reactivex.annotations.Nullable;
import io.reactivex.functions.Consumer;
import io.reactivex.internal.observers.BasicFuseableObserver;
/**
* Calls a consumer after pushing the current item to the downstream.
* @param the value type
* @since 2.0.1 - experimental
*/
@Experimental
public final class ObservableDoAfterNext extends AbstractObservableWithUpstream {
final Consumer super T> onAfterNext;
public ObservableDoAfterNext(ObservableSource source, Consumer super T> onAfterNext) {
super(source);
this.onAfterNext = onAfterNext;
}
@Override
protected void subscribeActual(Observer super T> s) {
source.subscribe(new DoAfterObserver(s, onAfterNext));
}
static final class DoAfterObserver extends BasicFuseableObserver {
final Consumer super T> onAfterNext;
DoAfterObserver(Observer super T> actual, Consumer super T> onAfterNext) {
super(actual);
this.onAfterNext = onAfterNext;
}
@Override
public void onNext(T t) {
actual.onNext(t);
if (sourceMode == NONE) {
try {
onAfterNext.accept(t);
} catch (Throwable ex) {
fail(ex);
}
}
}
@Override
public int requestFusion(int mode) {
return transitiveBoundaryFusion(mode);
}
@Nullable
@Override
public T poll() throws Exception {
T v = qs.poll();
if (v != null) {
onAfterNext.accept(v);
}
return v;
}
}
}
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