/**
* Copyright 2014 Netflix, Inc.
*
* 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 rx.internal.operators;
import java.util.
Arrays;
import rx.*;
import rx.
Observable.
OnSubscribe;
import rx.exceptions.*;
import rx.plugins.
RxJavaHooks;
/**
* Calls specified actions for each notification.
*
* @param <T> the value type
*/
public class
OnSubscribeDoOnEach<T> implements
OnSubscribe<T> {
private final
Observer<? super T>
doOnEachObserver;
private final
Observable<T>
source;
public
OnSubscribeDoOnEach(
Observable<T>
source,
Observer<? super T>
doOnEachObserver) {
this.
source =
source;
this.
doOnEachObserver =
doOnEachObserver;
}
@
Override
public void
call(final
Subscriber<? super T>
subscriber) {
source.
unsafeSubscribe(new
DoOnEachSubscriber<T>(
subscriber,
doOnEachObserver));
}
private static final class
DoOnEachSubscriber<T> extends
Subscriber<T> {
private final
Subscriber<? super T>
subscriber;
private final
Observer<? super T>
doOnEachObserver;
private boolean
done;
DoOnEachSubscriber(
Subscriber<? super T>
subscriber,
Observer<? super T>
doOnEachObserver) {
super(
subscriber);
this.
subscriber =
subscriber;
this.
doOnEachObserver =
doOnEachObserver;
}
@
Override
public void
onCompleted() {
if (
done) {
return;
}
try {
doOnEachObserver.
onCompleted();
} catch (
Throwable e) {
Exceptions.
throwOrReport(
e, this);
return;
}
// Set `done` here so that the error in `doOnEachObserver.onCompleted()` can be noticed by observer
done = true;
subscriber.
onCompleted();
}
@
Override
public void
onError(
Throwable e) {
if (
done) {
RxJavaHooks.
onError(
e);
return;
}
done = true;
try {
doOnEachObserver.
onError(
e);
} catch (
Throwable e2) {
Exceptions.
throwIfFatal(
e2);
subscriber.
onError(new
CompositeException(
Arrays.
asList(
e,
e2)));
return;
}
subscriber.
onError(
e);
}
@
Override
public void
onNext(T
value) {
if (
done) {
return;
}
try {
doOnEachObserver.
onNext(
value);
} catch (
Throwable e) {
Exceptions.
throwOrReport(
e, this,
value);
return;
}
subscriber.
onNext(
value);
}
}
}