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GH-3192: pub-sub DSL for broker-backed channels (#3193)

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* GH-3192: pub-sub DSL for broker-backed channels

Fixes https://github.com/spring-projects/spring-integration/issues/3192

* Introduce a `BroadcastCapableChannel` abstract to indicate those `SubscribableChannel`
implementations which can provide a pub-sub functionality
* Implement a `BroadcastCapableChannel` in broker-baked channels with pub-sub option
* Introduce a `BaseIntegrationFlowDefinition.publishSubscribeChannel()` based
on the `BroadcastCapableChannel` and `BroadcastPublishSubscribeSpec` to let to
configure sub-flow subscribers in fluent manner

* * Add some JavaDocs and document new feature

* * Show the channel bean definition in the doc
* Fix typo
This commit is contained in:
Artem Bilan
2020-02-25 13:01:38 -05:00
committed by GitHub
parent 7dbdbdee3f
commit 87c8e47a88
11 changed files with 265 additions and 63 deletions
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29
spring-integration-jms/src/test/java/org/springframework/integration/jms/dsl/JmsTests.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2016-2019 the original author or authors.
* Copyright 2016-2020 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.
@@ -41,6 +41,7 @@ import org.springframework.integration.annotation.InboundChannelAdapter;
import org.springframework.integration.annotation.IntegrationComponentScan;
import org.springframework.integration.annotation.MessagingGateway;
import org.springframework.integration.annotation.Poller;
import org.springframework.integration.channel.BroadcastCapableChannel;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.channel.FixedSubscriberChannel;
import org.springframework.integration.channel.QueueChannel;
@@ -125,6 +126,9 @@ public class JmsTests extends ActiveMQMultiContextTests {
@Autowired
private PollableChannel jmsPubSubBridgeChannel;
@Autowired
private PollableChannel jmsPubSubBridgeChannel2;
@Autowired
@Qualifier("jmsOutboundGateway.handler")
private MessageHandler jmsOutboundGatewayHandler;
@@ -254,6 +258,11 @@ public class JmsTests extends ActiveMQMultiContextTests {
.isNotNull()
.extracting(Message::getPayload)
.isEqualTo("foo");
received = this.jmsPubSubBridgeChannel2.receive(5000);
assertThat(received)
.isNotNull()
.extracting(Message::getPayload)
.isEqualTo("foo");
}
@Test
@@ -351,10 +360,20 @@ public class JmsTests extends ActiveMQMultiContextTests {
@Bean
public IntegrationFlow pubSubFlow() {
return IntegrationFlows
.from(Jms.publishSubscribeChannel(jmsConnectionFactory())
.destination("pubsub"))
.channel(c -> c.queue("jmsPubSubBridgeChannel"))
return f -> f
.publishSubscribeChannel(jmsPublishSubscribeChannel(),
pubsub -> pubsub
.subscribe(subFlow -> subFlow
.channel(c -> c.queue("jmsPubSubBridgeChannel")))
.subscribe(subFlow -> subFlow
.channel(c -> c.queue("jmsPubSubBridgeChannel2"))));
}
@Bean
public BroadcastCapableChannel jmsPublishSubscribeChannel() {
// TODO reconsider target generic type for channel implementation to return from this kind of specs
return (BroadcastCapableChannel) Jms.publishSubscribeChannel(jmsConnectionFactory())
.destination("pubsub")
.get();
}