GsUtil.java

/*
 * Copyright 2014 Avanza Bank AB
 *
 * 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 com.avanza.astrix.remoting.util;

import java.util.ArrayList;
import java.util.List;

import org.openspaces.remoting.SpaceRemotingResult;

import com.avanza.astrix.core.AstrixRemoteResult;
import com.avanza.astrix.core.CorrelationId;
import com.avanza.astrix.core.RemoteServiceInvocationException;
import com.avanza.astrix.core.ServiceInvocationException;
import com.gigaspaces.async.AsyncFuture;
import com.gigaspaces.async.AsyncFutureListener;
import com.gigaspaces.async.AsyncResult;

import rx.Observable;
import rx.Observable.OnSubscribe;
import rx.Subscriber;
import rx.functions.Func1;

/**
 * @author joasah
 */
public class GsUtil {
	
	@Deprecated
	public static <T> List<AstrixRemoteResult<T>> convertToAstrixRemoteResults(SpaceRemotingResult<T>[] results) {
		List<AstrixRemoteResult<T>> converted = new ArrayList<AstrixRemoteResult<T>>(results.length);
		for (SpaceRemotingResult<T> result : results) {
			if (result.getException() != null) {
				converted.add(AstrixRemoteResult.<T>failure(toRuntimeException(result.getException()), CorrelationId.undefined()));
			} else {
				converted.add(AstrixRemoteResult.successful(result.getResult()));
			}
		}
		return converted;
	}
	
	private static ServiceInvocationException toRuntimeException(Throwable exception) {
		if (exception instanceof RuntimeException) {
			return (ServiceInvocationException) exception;
		} else {
			return new RemoteServiceInvocationException("Remote service threw exception: " + exception.getMessage(), exception.getClass().getName());
		}
	}
	
	public static <T> void subscribe(final AsyncFuture<T> asyncFuture, final Subscriber<? super T> t1) {
		asyncFuture.setListener(new AsyncFutureListener<T>() {
			@Override
			public void onResult(AsyncResult<T> result) {
				if (result.getException() == null) {
					t1.onNext(result.getResult());
					t1.onCompleted();
				} else {
					t1.onError(result.getException());
				}
			}
		});
	}

	public static <T> Func1<List<AsyncResult<T>>, Observable<T>> asyncResultListToObservable() {
		return new Func1<List<AsyncResult<T>>, Observable<T>>() {
			@Override
			public Observable<T> call(final List<AsyncResult<T>> asyncRresults) {
				return Observable.create(new OnSubscribe<T>() {
					@Override
					public void call(Subscriber<? super T> subscriber) {
						for (AsyncResult<T> asyncInvocationResponse : asyncRresults) {
							if (asyncInvocationResponse.getException() != null) {
								subscriber.onError(asyncInvocationResponse.getException());
								return;
							}
							subscriber.onNext(asyncInvocationResponse.getResult());
						}
						subscriber.onCompleted();
					}
				});
			}};
	}
	
}