消息传递

@RunWith(SpringTestRunner.class)
@SpringBootTest
@AutoConfigureMessageVerifier
public static class MessagingContractTests {

  @Autowired
  private MessageVerifier verifier;
  ...
}

import java.util.Collection;
import java.util.Map;

/**
 * Contract for triggering stub messages.
 *
 * @author Marcin Grzejszczak
 */
public interface StubTrigger {

	/**
	 * Triggers an event by a given label for a given {@code groupid:artifactid} notation.
	 * You can use only {@code artifactId} too.
	 *
	 * Feature related to messaging.
	 * @param ivyNotation ivy notation of a stub
	 * @param labelName name of the label to trigger
	 * @return true - if managed to run a trigger
	 */
	boolean trigger(String ivyNotation, String labelName);

	/**
	 * Triggers an event by a given label.
	 *
	 * Feature related to messaging.
	 * @param labelName name of the label to trigger
	 * @return true - if managed to run a trigger
	 */
	boolean trigger(String labelName);

	/**
	 * Triggers all possible events.
	 *
	 * Feature related to messaging.
	 * @return true - if managed to run a trigger
	 */
	boolean trigger();

	/**
	 * Feature related to messaging.
	 * @return a mapping of ivy notation of a dependency to all the labels it has.
	 */
	Map<String, Collection<String>> labels();

}

stubFinder.trigger('return_book_1')

stubFinder.trigger('org.springframework.cloud.contract.verifier.stubs:streamService', 'return_book_1')

└── .m2
    └── repository
        └── io
            └── codearte
                └── accurest
                    └── stubs
                        └── camelService
                            ├── 0.0.1-SNAPSHOT
                            │   ├── camelService-0.0.1-SNAPSHOT.pom
                            │   ├── camelService-0.0.1-SNAPSHOT-stubs.jar
                            │   └── maven-metadata-local.xml
                            └── maven-metadata-local.xml

├── META-INF
│   └── MANIFEST.MF
└── repository
    ├── accurest
    │   └── bookReturned1.groovy
    └── mappings

Contract.make {
	label 'return_book_1'
	input {
		triggeredBy('bookReturnedTriggered()')
	}
	outputMessage {
		sentTo('rabbitmq:output?queue=output')
		body('''{ "bookName" : "foo" }''')
		headers {
			header('BOOK-NAME', 'foo')
		}
	}
}

stubFinder.trigger("return_book_1")

└── .m2
    └── repository
        └── io
            └── codearte
                └── accurest
                    └── stubs
                        └── integrationService
                            ├── 0.0.1-SNAPSHOT
                            │   ├── integrationService-0.0.1-SNAPSHOT.pom
                            │   ├── integrationService-0.0.1-SNAPSHOT-stubs.jar
                            │   └── maven-metadata-local.xml
                            └── maven-metadata-local.xml

├── META-INF
│   └── MANIFEST.MF
└── repository
    ├── accurest
    │   └── bookReturned1.groovy
    └── mappings

Contract.make {
	label 'return_book_1'
	input {
		triggeredBy('bookReturnedTriggered()')
	}
	outputMessage {
		sentTo('output')
		body('''{ "bookName" : "foo" }''')
		headers {
			header('BOOK-NAME', 'foo')
		}
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
			 xmlns:beans="http://www.springframework.org/schema/beans"
			 xmlns="http://www.springframework.org/schema/integration"
			 xsi:schemaLocation="http://www.springframework.org/schema/beans
			https://www.springframework.org/schema/beans/spring-beans.xsd
			http://www.springframework.org/schema/integration
			http://www.springframework.org/schema/integration/spring-integration.xsd">


	<!-- REQUIRED FOR TESTING -->
	<bridge input-channel="output"
			output-channel="outputTest"/>

	<channel id="outputTest">
		<queue/>
	</channel>

</beans:beans>

stubFinder.trigger('return_book_1')

└── .m2
    └── repository
        └── io
            └── codearte
                └── accurest
                    └── stubs
                        └── streamService
                            ├── 0.0.1-SNAPSHOT
                            │   ├── streamService-0.0.1-SNAPSHOT.pom
                            │   ├── streamService-0.0.1-SNAPSHOT-stubs.jar
                            │   └── maven-metadata-local.xml
                            └── maven-metadata-local.xml

├── META-INF
│   └── MANIFEST.MF
└── repository
    ├── accurest
    │   └── bookReturned1.groovy
    └── mappings

Contract.make {
	label 'return_book_1'
	input { triggeredBy('bookReturnedTriggered()') }
	outputMessage {
		sentTo('returnBook')
		body('''{ "bookName" : "foo" }''')
		headers { header('BOOK-NAME', 'foo') }
	}
}

@ImportAutoConfiguration(TestChannelBinderConfiguration.class)
@Configuration(proxyBeanMethods = true)
@EnableAutoConfiguration
protected static class Config {

	@Bean
	Function<String, String> test1() {
		return (input) -> {
			println "Test 1 [${input}]"
			return input
		}
	}

}

stubrunner.repositoryRoot: classpath:m2repo/repository/
stubrunner.ids: org.springframework.cloud.contract.verifier.stubs:streamService:0.0.1-SNAPSHOT:stubs
stubrunner.stubs-mode: remote
spring:
  cloud:
    stream:
      bindings:
        test1-in-0:
          destination: returnBook
        test1-out-0:
          destination: outputToAssertBook
    function:
      definition: test1

server:
  port: 0

debug: true

stubFinder.trigger('return_book_1')

├── stubs
    └── bookReturned1.groovy

stubrunner:
  repository-root: stubs:classpath:/stubs/
  ids: my:stubs
  stubs-mode: remote
spring:
  activemq:
    send-timeout: 1000
  jms:
    template:
      receive-timeout: 1000

Contract.make {
	label 'return_book_1'
	input {
		triggeredBy('bookReturnedTriggered()')
	}
	outputMessage {
		sentTo('output')
		body('''{ "bookName" : "foo" }''')
		headers {
			header('BOOKNAME', 'foo')
		}
	}
}

stubFinder.trigger('return_book_1')