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CallEnqueueObservable.java
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CallEnqueueObservable.java
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/*
* Copyright (C) 2020 Square, 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 retrofit2.adapter.rxjava3;
import io.reactivex.rxjava3.core.Observable;
import io.reactivex.rxjava3.core.Observer;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.exceptions.CompositeException;
import io.reactivex.rxjava3.exceptions.Exceptions;
import io.reactivex.rxjava3.plugins.RxJavaPlugins;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
final class CallEnqueueObservable<T> extends Observable<Response<T>> {
private final Call<T> originalCall;
CallEnqueueObservable(Call<T> originalCall) {
this.originalCall = originalCall;
}
@Override
protected void subscribeActual(Observer<? super Response<T>> observer) {
// Since Call is a one-shot type, clone it for each new observer.
Call<T> call = originalCall.clone();
CallCallback<T> callback = new CallCallback<>(call, observer);
observer.onSubscribe(callback);
if (!callback.isDisposed()) {
call.enqueue(callback);
}
}
private static final class CallCallback<T> implements Disposable, Callback<T> {
private final Call<?> call;
private final Observer<? super Response<T>> observer;
private volatile boolean disposed;
boolean terminated = false;
CallCallback(Call<?> call, Observer<? super Response<T>> observer) {
this.call = call;
this.observer = observer;
}
@Override
public void onResponse(Call<T> call, Response<T> response) {
if (disposed) return;
try {
observer.onNext(response);
if (!disposed) {
terminated = true;
observer.onComplete();
}
} catch (Throwable t) {
Exceptions.throwIfFatal(t);
if (terminated) {
RxJavaPlugins.onError(t);
} else if (!disposed) {
try {
observer.onError(t);
} catch (Throwable inner) {
Exceptions.throwIfFatal(inner);
RxJavaPlugins.onError(new CompositeException(t, inner));
}
}
}
}
@Override
public void onFailure(Call<T> call, Throwable t) {
if (call.isCanceled()) return;
try {
observer.onError(t);
} catch (Throwable inner) {
Exceptions.throwIfFatal(inner);
RxJavaPlugins.onError(new CompositeException(t, inner));
}
}
@Override
public void dispose() {
disposed = true;
call.cancel();
}
@Override
public boolean isDisposed() {
return disposed;
}
}
}