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Reactive StreamListener does not propagate headers
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| /* | |
| * Copyright 2016-2017 the original author or 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 | |
| * | |
| * 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.springframework.cloud.stream.reactive; | |
| import java.io.Closeable; | |
| import org.apache.commons.logging.Log; | |
| import org.apache.commons.logging.LogFactory; | |
| import org.reactivestreams.Publisher; | |
| import reactor.core.Disposable; | |
| import reactor.core.publisher.Flux; | |
| import org.springframework.cloud.stream.binding.StreamListenerResultAdapter; | |
| import org.springframework.integration.support.MessageBuilder; | |
| import org.springframework.messaging.Message; | |
| import org.springframework.messaging.MessageChannel; | |
| /** | |
| * A {@link org.springframework.cloud.stream.binding.StreamListenerResultAdapter} from a | |
| * {@link Publisher} return type to a bound {@link MessageChannel}. | |
| * | |
| * @author Marius Bogoevici | |
| * @author Soby Chacko | |
| * | |
| */ | |
| public class PublisherToMessageChannelResultAdapter | |
| implements StreamListenerResultAdapter<Publisher<?>, MessageChannel> { | |
| private Log log = LogFactory.getLog(PublisherToMessageChannelResultAdapter.class); | |
| @Override | |
| public boolean supports(Class<?> resultType, Class<?> bindingTarget) { | |
| return Publisher.class.isAssignableFrom(resultType) | |
| && MessageChannel.class.isAssignableFrom(bindingTarget); | |
| } | |
| public Closeable adapt(Publisher<?> streamListenerResult, MessageChannel bindingTarget) { | |
| Disposable disposable = Flux.from(streamListenerResult) | |
| .doOnError(e -> this.log.error("Error while processing result", e)) | |
| .retry() | |
| .subscribe( | |
| result -> | |
| bindingTarget.send(result instanceof Message<?> | |
| ? (Message<?>) result | |
| : MessageBuilder.withPayload(result).build())); //Here! | |
| //Convert to a message whose headers are not propagated | |
| return disposable::dispose; | |
| } | |
| } |
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