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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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38
spring-cloud-function-samples/function-sample-cloudevent/src/main/java/io/spring/cloudevent/CloudeventDemoApplication.java
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@@ -20,8 +20,12 @@ import java.util.function.Function;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.function.cloudevent.CloudEventAttributes;
import org.springframework.cloud.function.cloudevent.CloudEventAtttributesProvider;
import org.springframework.cloud.function.cloudevent.DefaultCloudEventAttributesProvider;
import org.springframework.context.annotation.Bean;
import org.springframework.messaging.Message;
import org.springframework.messaging.support.MessageBuilder;
/**
* Sample application that demonstrates how user functions can be triggered by cloud event.
@@ -77,4 +81,38 @@ public class CloudeventDemoApplication {
return v.toString();
};
}
@Bean
public Function<Message<SpringReleaseEvent>, Message<SpringReleaseEvent>> consumeAndProduceCloudEvent(CloudEventAtttributesProvider ceAttrProvider) {
return ceMessage -> {
SpringReleaseEvent data = ceMessage.getPayload();
data.setVersion("2.0");
data.setReleaseDateAsString("01-10-2006");
CloudEventAttributes ceAttributes = ceAttrProvider.get(ceMessage.getHeaders())
.setSource("https://interface21.icom/")
.setType("com.interface21");
return MessageBuilder.withPayload(data).copyHeaders(ceAttributes).build();
};
}
// // spring.io/applicationName
//
// @Bean
// public Function<Message<SpringReleaseEvent>, SpringReleaseEvent> consumeAndProduceCloudEvent() {
// return ceMessage -> {
// SpringReleaseEvent data = ceMessage.getPayload();
// data.setVersion("2.0");
// data.setReleaseDateAsString("01-10-2006");
//
// CloudEventAtttributesProvider ceAttrProvider = new DefaultCloudEventAttributesProvider();
//
// CloudEventAttributes ceAttributes = ceAttrProvider.get(ceMessage.getHeaders())
// .setSource("https://interface21.icom/")
// .setType("com.interface21");
//
// return MessageBuilder.withPayload(data).copyHeaders(ceAttributes).build();
// };
// }
}

10
spring-cloud-function-samples/function-sample-cloudevent/src/main/java/io/spring/cloudevent/SpringReleaseEvent.java
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@@ -16,6 +16,7 @@
package io.spring.cloudevent;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
@@ -44,6 +45,15 @@ public class SpringReleaseEvent {
this.releaseDate = releaseDate;
}
public void setReleaseDateAsString(String releaseDate) {
try {
this.releaseDate = new SimpleDateFormat("dd-MM-yyyy").parse(releaseDate);
}
catch (ParseException e) {
throw new IllegalArgumentException(e);
}
}
public String getReleaseName() {
return releaseName;
}

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));
}
}
}