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GH-422 GH-606 Add support for simplifying message headers to attribute mapping

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Added CloudEventAttributesProvider and default implementation
Added CloudEventMessageUtils
This commit is contained in:
Oleg Zhurakousky
2020-11-13 10:24:27 +01:00
parent f999cdd787
commit 9c58e6d64b
12 changed files with 438 additions and 69 deletions
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68
spring-cloud-function-samples/function-sample-cloudevent/src/test/java/io/spring/cloudevent/CloudeventDemoApplicationFunctionTests.java
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@@ -20,8 +20,10 @@ import java.util.function.Function;
import org.junit.jupiter.api.Test;
import org.springframework.boot.SpringApplication;
import org.springframework.cloud.function.cloudevent.CloudEventAtttributesProvider;
import org.springframework.cloud.function.cloudevent.DefaultCloudEventAttributesProvider;
import org.springframework.cloud.function.context.FunctionCatalog;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.messaging.Message;
import org.springframework.messaging.support.MessageBuilder;
@@ -34,31 +36,51 @@ public class CloudeventDemoApplicationFunctionTests {
@Test
public void demoPureFunctionInvocation() {
ApplicationContext context = SpringApplication.run(CloudeventDemoApplication.class);
FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
Message<String> binaryCloudEventMessage = MessageBuilder
.withPayload("{\"releaseDate\":\"24-03-2004\", \"releaseName\":\"Spring Framework\", \"version\":\"1.0\"}")
.setHeader("ce-specversion", "1.0")
.setHeader("ce-type", "com.example.springevent")
.setHeader("ce-source", "spring.io/spring-event")
.setHeader("ce-id", "123-456-9876-09")
.build();
/*
* NOTE how it makes no difference what the actual function signature
* is (see `asPOJOMessage` and `asPOJO` specifically). Type conversion will happen
* inside spring-cloud-function.
*/
Function<Message<String>, String> asPojoMessage = catalog.lookup("asPOJOMessage");
System.out.println(asPojoMessage.apply(binaryCloudEventMessage));
try(ConfigurableApplicationContext context = SpringApplication.run(CloudeventDemoApplication.class)) {
FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
CloudEventAtttributesProvider ceAttrProvider = new DefaultCloudEventAttributesProvider();
Message<String> binaryCloudEventMessage = MessageBuilder
.withPayload("{\"releaseDate\":\"24-03-2004\", \"releaseName\":\"Spring Framework\", \"version\":\"1.0\"}")
.copyHeaders(ceAttrProvider.get("spring.io/spring-event", "com.example.springevent"))
.build();
Function<Message<String>, String> asPojo = catalog.lookup("asPOJO");
System.out.println(asPojo.apply(binaryCloudEventMessage));
/*
* NOTE how it makes no difference what the actual function signature
* is (see `asPOJOMessage` and `asPOJO` specifically). Type conversion will happen
* inside spring-cloud-function.
*/
Function<Message<String>, String> asPojoMessage = catalog.lookup("asPOJOMessage");
System.out.println(asPojoMessage.apply(binaryCloudEventMessage));
Function<Message<String>, String> asString = catalog.lookup("asString");
System.out.println(asString.apply(binaryCloudEventMessage));
Function<Message<String>, String> asPojo = catalog.lookup("asPOJO");
System.out.println(asPojo.apply(binaryCloudEventMessage));
Function<Message<String>, String> asStringMessage = catalog.lookup("asStringMessage");
System.out.println(asStringMessage.apply(binaryCloudEventMessage));
Function<Message<String>, String> asString = catalog.lookup("asString");
System.out.println(asString.apply(binaryCloudEventMessage));
Function<Message<String>, String> asStringMessage = catalog.lookup("asStringMessage");
System.out.println(asStringMessage.apply(binaryCloudEventMessage));
}
}
@Test
public void demoPureFunctionProduceConsumeCloudEvent() {
try(ConfigurableApplicationContext context = SpringApplication.run(CloudeventDemoApplication.class)) {
FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
CloudEventAtttributesProvider ceAttrProvider = new DefaultCloudEventAttributesProvider();
Message<String> binaryCloudEventMessage = MessageBuilder
.withPayload("{\"releaseDate\":\"24-03-2004\", \"releaseName\":\"Spring Framework\", \"version\":\"1.0\"}")
.copyHeaders(ceAttrProvider.get("spring.io/spring-event", "com.example.springevent"))
.build();
/*
* NOTE how it makes no difference what the actual function signature
* is (see `asPOJOMessage` and `asPOJO` specifically). Type conversion will happen
* inside spring-cloud-function.
*/
Function<Message<String>, Message<String>> asPojoMessage = catalog.lookup("consumeAndProduceCloudEvent");
System.out.println(asPojoMessage.apply(binaryCloudEventMessage));
}
}
}