rx.observers.SafeCompletableSubscriber Maven / Gradle / Ivy
/**
* Copyright 2016 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.observers;
import rx.CompletableSubscriber;
import rx.Subscription;
import rx.annotations.Experimental;
import rx.exceptions.*;
import rx.plugins.RxJavaHooks;
/**
* Wraps another CompletableSubscriber and handles exceptions thrown
* from onError and onCompleted.
*
* @since (if this graduates from Experimental/Beta to supported, replace this parenthetical with the release number)
*/
@Experimental
public final class SafeCompletableSubscriber implements CompletableSubscriber, Subscription {
final CompletableSubscriber actual;
Subscription s;
boolean done;
public SafeCompletableSubscriber(CompletableSubscriber actual) {
this.actual = actual;
}
@Override
public void onCompleted() {
if (done) {
return;
}
done = true;
try {
actual.onCompleted();
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
throw new OnCompletedFailedException(ex);
}
}
@Override
public void onError(Throwable e) {
RxJavaHooks.onError(e);
if (done) {
return;
}
done = true;
try {
actual.onError(e);
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
throw new OnErrorFailedException(new CompositeException(e, ex));
}
}
@Override
public void onSubscribe(Subscription d) {
this.s = d;
try {
actual.onSubscribe(this);
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
d.unsubscribe();
onError(ex);
}
}
@Override
public void unsubscribe() {
s.unsubscribe();
}
@Override
public boolean isUnsubscribed() {
return done || s.isUnsubscribed();
}
}
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