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rxjava-core developed by Netflix
/**
* 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.operators;
/**
* 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.
*/
import java.util.concurrent.atomic.AtomicInteger;
import rx.Observable;
import rx.Observable.Operator;
import rx.Scheduler.Inner;
import rx.Subscriber;
import rx.functions.Action1;
import rx.schedulers.Schedulers;
public class OperatorRetry implements Operator> {
private static final int INFINITE_RETRY = -1;
private final int retryCount;
public OperatorRetry(int retryCount) {
this.retryCount = retryCount;
}
public OperatorRetry() {
this(INFINITE_RETRY);
}
@Override
public Subscriber super Observable> call(final Subscriber super T> s) {
return new Subscriber>(s) {
final AtomicInteger attempts = new AtomicInteger(0);
@Override
public void onCompleted() {
// ignore as we expect a single nested Observable
}
@Override
public void onError(Throwable e) {
s.onError(e);
}
@Override
public void onNext(final Observable o) {
Schedulers.trampoline().schedule(new Action1() {
@Override
public void call(final Inner inner) {
final Action1 _self = this;
attempts.incrementAndGet();
o.subscribe(new Subscriber(s) {
@Override
public void onCompleted() {
s.onCompleted();
}
@Override
public void onError(Throwable e) {
if ((retryCount == INFINITE_RETRY || attempts.get() <= retryCount) && !inner.isUnsubscribed()) {
// retry again
inner.schedule(_self);
} else {
// give up and pass the failure
s.onError(e);
}
}
@Override
public void onNext(T v) {
s.onNext(v);
}
});
}
});
}
};
}
}
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