/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.camel.rx;
import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.rx.support.EndpointObservable;
import org.apache.camel.rx.support.EndpointSubscription;
import org.apache.camel.rx.support.ExchangeToBodyFunc1;
import org.apache.camel.rx.support.ExchangeToMessageFunc1;
import org.apache.camel.rx.support.ObserverSender;
import org.apache.camel.util.CamelContextHelper;
import rx.Observable;
import rx.Observer;
import rx.Subscription;
import rx.util.functions.Func1;
/**
* Provides the <a href="https://rx.codeplex.com/">Reactive Extensions</a> support for
* Camel via the <a href="https://github.com/Netflix/RxJava/wiki">RxJava library</a>
*/
public class ReactiveCamel {
private final CamelContext camelContext;
public ReactiveCamel(CamelContext camelContext) {
this.camelContext = camelContext;
}
/**
* Returns an {@link rx.Observable < org.apache.camel.Message >} to allow the messages sent on the endpoint
* to be processed using <a href="https://rx.codeplex.com/">Reactive Extensions</a>
*/
public Observable<Message> toObservable(String uri) {
return toObservable(endpoint(uri));
}
/**
* Returns an {@link rx.Observable <T>} for the messages with their payload converted to the given type
* to allow the messages sent on the endpoint
* to be processed using <a href="https://rx.codeplex.com/">Reactive Extensions</a>
*/
public <T> Observable<T> toObservable(String uri, final Class<T> bodyType) {
return toObservable(endpoint(uri), bodyType);
}
/**
* Returns an {@link rx.Observable < org.apache.camel.Message >} to allow the messages sent on the endpoint
* to be processed using <a href="https://rx.codeplex.com/">Reactive Extensions</a>
*/
public Observable<Message> toObservable(Endpoint endpoint) {
return createEndpointObservable(endpoint, ExchangeToMessageFunc1.getInstance());
}
/**
* Returns an {@link rx.Observable <T>} for the messages with their payload converted to the given type
* to allow the messages sent on the endpoint
* to be processed using <a href="https://rx.codeplex.com/">Reactive Extensions</a>
*/
public <T> Observable<T> toObservable(Endpoint endpoint, final Class<T> bodyType) {
return createEndpointObservable(endpoint, new ExchangeToBodyFunc1<T>(bodyType));
}
/**
* Sends events on the given {@link Observable} to the given camel endpoint
*/
public <T> void sendTo(Observable<T> observable, String endpointUri) {
sendTo(observable, endpoint(endpointUri));
}
/**
* Sends events on the given {@link Observable} to the given camel endpoint
*/
@SuppressWarnings("unchecked")
public <T> void sendTo(Observable<T> observable, Endpoint endpoint) {
try {
ObserverSender observer = new ObserverSender(endpoint);
observable.subscribe(observer);
} catch (Exception e) {
throw new RuntimeCamelRxException(e);
}
}
public CamelContext getCamelContext() {
return camelContext;
}
public Endpoint endpoint(String endpointUri) {
return CamelContextHelper.getMandatoryEndpoint(camelContext, endpointUri);
}
/**
* Returns a newly created {@link Observable} given a function which converts
* the {@link Exchange} from the Camel consumer to the required type
*/
@SuppressWarnings("unchecked")
protected <T> Observable<T> createEndpointObservable(final Endpoint endpoint,
final Func1<Exchange, T> converter) {
Observable.OnSubscribeFunc<Message> func = new Observable.OnSubscribeFunc<Message>() {
@Override
public Subscription onSubscribe(Observer<? super Message> observer) {
return new EndpointSubscription(endpoint, observer, converter);
}
};
return new EndpointObservable(endpoint, func);
}
}