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package org.glassfish.jersey.client.rx.rxjava;
import java.util.concurrent.ExecutorService;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation;
import javax.ws.rs.client.InvocationCallback;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.Response;
import org.glassfish.jersey.client.rx.spi.AbstractRxInvoker;
import rx.Observable;
import rx.Scheduler;
import rx.Subscriber;
import rx.schedulers.Schedulers;
import rx.subscriptions.CompositeSubscription;
import rx.subscriptions.Subscriptions;
/**
* Implementation of Reactive Invoker for {@code Observable}.
*
* @author Michal Gajdos (michal.gajdos at oracle.com)
* @since 2.13
*/
final class JerseyRxObservableInvoker extends AbstractRxInvoker<Observable> implements RxObservableInvoker {
JerseyRxObservableInvoker(final Invocation.Builder builder, final ExecutorService executor) {
super(builder, executor);
}
@Override
public <T> Observable<T> method(final String name, final Entity<?> entity, final Class<T> responseType) {
if (getExecutorService() == null) {
// Invoke as async JAX-RS client request.
return Observable.create(new Observable.OnSubscribe<T>() {
@Override
public void call(final Subscriber<? super T> subscriber) {
final CompositeSubscription parent = new CompositeSubscription();
subscriber.add(parent);
// return a Subscription that wraps the Future to make sure it can be cancelled
parent.add(Subscriptions.from(getBuilder().async().method(name, entity, new InvocationCallback<Response>() {
@Override
public void completed(final Response response) {
if (!subscriber.isUnsubscribed()) {
try {
final T entity = responseType.isAssignableFrom(response.getClass())
? responseType.cast(response) : response.readEntity(responseType);
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(entity);
}
if (!subscriber.isUnsubscribed()) {
subscriber.onCompleted();
}
} catch (final Throwable throwable) {
failed(throwable);
}
}
}
@Override
public void failed(final Throwable throwable) {
if (!subscriber.isUnsubscribed()) {
subscriber.onError(throwable);
}
}
})));
}
});
} else {
// Invoke as sync JAX-RS client request and subscribe/observe on a scheduler initialized with executor service.
final Scheduler scheduler = Schedulers.from(getExecutorService());
return Observable.create(new Observable.OnSubscribe<T>() {
@Override
public void call(final Subscriber<? super T> subscriber) {
if (!subscriber.isUnsubscribed()) {
try {
final T response = getBuilder().method(name, entity, responseType);
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(response);
}
if (!subscriber.isUnsubscribed()) {
subscriber.onCompleted();
}
} catch (final Throwable throwable) {
if (!subscriber.isUnsubscribed()) {
subscriber.onError(throwable);
}
}
}
}
}).subscribeOn(scheduler).observeOn(scheduler);
}
}
@Override
public <T> Observable<T> method(final String name, final Entity<?> entity, final GenericType<T> responseType) {
if (getExecutorService() == null) {
// Invoke as async JAX-RS client request.
return Observable.create(new Observable.OnSubscribe<T>() {
@Override
public void call(final Subscriber<? super T> subscriber) {
final CompositeSubscription parent = new CompositeSubscription();
subscriber.add(parent);
// return a Subscription that wraps the Future to make sure it can be cancelled
parent.add(Subscriptions.from(getBuilder().async().method(name, entity, new InvocationCallback<Response>() {
@Override
public void completed(final Response response) {
if (!subscriber.isUnsubscribed()) {
try {
@SuppressWarnings("unchecked")
final Class<T> clazz = (Class<T>) responseType.getRawType();
final T entity = clazz.isAssignableFrom(response.getClass())
? clazz.cast(response) : response.readEntity(responseType);
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(entity);
}
if (!subscriber.isUnsubscribed()) {
subscriber.onCompleted();
}
} catch (final Throwable throwable) {
failed(throwable);
}
}
}
@Override
public void failed(final Throwable throwable) {
if (!subscriber.isUnsubscribed()) {
subscriber.onError(throwable);
}
}
})));
}
});
} else {
// Invoke as sync JAX-RS client request and subscribe/observe on a scheduler initialized with executor service.
final Scheduler scheduler = Schedulers.from(getExecutorService());
return Observable.create(new Observable.OnSubscribe<T>() {
@Override
public void call(final Subscriber<? super T> subscriber) {
if (!subscriber.isUnsubscribed()) {
try {
final T response = getBuilder().method(name, entity, responseType);
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(response);
}
if (!subscriber.isUnsubscribed()) {
subscriber.onCompleted();
}
} catch (final Throwable throwable) {
if (!subscriber.isUnsubscribed()) {
subscriber.onError(throwable);
}
}
}
}
}).subscribeOn(scheduler).observeOn(scheduler);
}
}
}