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Integration between Micronaut and RxJava 3
/*
* Copyright 2017-2020 original authors
*
* 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
*
* https://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.micronaut.rxjava3.converters;
import hu.akarnokd.rxjava3.bridge.RxJavaBridge;
import io.micronaut.context.annotation.BootstrapContextCompatible;
import io.micronaut.context.annotation.Requires;
import io.micronaut.core.annotation.TypeHint;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.core.convert.TypeConverterRegistrar;
import io.reactivex.rxjava3.core.*;
import org.reactivestreams.Publisher;
import javax.inject.Singleton;
/**
* Converters for RxJava 3. Copied from {@link io.micronaut.reactive.rxjava2.converters.RxJavaConverterRegistrar}.
*
* @author graemerocher
* @since 1.0
*/
@Singleton
@Requires(classes = Flowable.class)
@BootstrapContextCompatible
@TypeHint({
Flowable.class,
Maybe.class,
Completable.class,
Single.class,
Observable.class
})
public class RxJava3ConverterRegistrar implements TypeConverterRegistrar {
@SuppressWarnings("unchecked")
@Override
public void register(ConversionService> conversionService) {
// Interop Maybe
conversionService.addConverter(Maybe.class, io.reactivex.Maybe.class, RxJavaBridge::toV2Maybe);
conversionService.addConverter(io.reactivex.Maybe.class, Maybe.class, RxJavaBridge::toV3Maybe);
conversionService.addConverter(Maybe.class, io.reactivex.Flowable.class, maybe ->
RxJavaBridge.toV2Maybe(maybe).toFlowable()
);
conversionService.addConverter(io.reactivex.Flowable.class, Maybe.class, flowable ->
RxJavaBridge.toV3Flowable(flowable).firstElement()
);
conversionService.addConverter(Maybe.class, io.reactivex.Single.class, maybe ->
RxJavaBridge.toV2Maybe(maybe).toSingle()
);
// Interop Single
conversionService.addConverter(Single.class, io.reactivex.Single.class, RxJavaBridge::toV2Single);
conversionService.addConverter(io.reactivex.Single.class, Single.class, RxJavaBridge::toV3Single);
conversionService.addConverter(Single.class, io.reactivex.Flowable.class, single ->
RxJavaBridge.toV2Single(single).toFlowable()
);
conversionService.addConverter(io.reactivex.Flowable.class, Single.class, flowable ->
RxJavaBridge.toV3Flowable(flowable).firstOrError()
);
conversionService.addConverter(Single.class, io.reactivex.Maybe.class, single ->
RxJavaBridge.toV2Single(single).toMaybe()
);
// Interop Flowable
conversionService.addConverter(Flowable.class, io.reactivex.Flowable.class, RxJavaBridge::toV2Flowable);
conversionService.addConverter(io.reactivex.Flowable.class, Flowable.class, RxJavaBridge::toV3Flowable);
// Completable
conversionService.addConverter(Completable.class, Publisher.class, Completable::toFlowable);
conversionService.addConverter(Completable.class, Single.class, (completable) ->
completable.toSingleDefault(new Object())
);
conversionService.addConverter(Completable.class, Maybe.class, Completable::toMaybe);
conversionService.addConverter(Completable.class, Observable.class, Completable::toObservable);
conversionService.addConverter(Object.class, Completable.class, (obj) -> Completable.complete());
// Maybe
conversionService.addConverter(Maybe.class, Publisher.class, Maybe::toFlowable);
conversionService.addConverter(Maybe.class, Single.class, Maybe::toSingle);
conversionService.addConverter(Maybe.class, Observable.class, Maybe::toObservable);
conversionService.addConverter(Maybe.class, Completable.class, Completable::fromMaybe);
conversionService.addConverter(Object.class, Maybe.class, Maybe::just);
// Observable
conversionService.addConverter(Observable.class, Publisher.class, observable ->
observable.toFlowable(BackpressureStrategy.BUFFER)
);
conversionService.addConverter(Observable.class, Single.class, Observable::firstOrError);
conversionService.addConverter(Observable.class, Maybe.class, Observable::firstElement);
conversionService.addConverter(Observable.class, Completable.class, Completable::fromObservable);
conversionService.addConverter(Object.class, Observable.class, o -> {
if (o instanceof Iterable) {
return Observable.fromIterable((Iterable) o);
} else {
return Observable.just(o);
}
});
// Single
conversionService.addConverter(Single.class, Publisher.class, Single::toFlowable);
conversionService.addConverter(Single.class, Maybe.class, Single::toMaybe);
conversionService.addConverter(Single.class, Observable.class, Single::toObservable);
conversionService.addConverter(Single.class, Completable.class, Completable::fromSingle);
conversionService.addConverter(Object.class, Single.class, Single::just);
// Flowable
conversionService.addConverter(Flowable.class, Single.class, Flowable::firstOrError);
conversionService.addConverter(Flowable.class, Maybe.class, Flowable::firstElement);
conversionService.addConverter(Flowable.class, Observable.class, Flowable::toObservable);
conversionService.addConverter(Flowable.class, Completable.class, Completable::fromPublisher);
conversionService.addConverter(Object.class, Flowable.class, o -> {
if (o instanceof Iterable) {
return Flowable.fromIterable((Iterable) o);
} else {
return Flowable.just(o);
}
});
}
}
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