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GH-422, GH-606 Add support for generating attributes using provider in Consumer

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This commit is contained in:
Oleg Zhurakousky
2020-11-16 16:27:54 +01:00
parent 6093aefe14
commit ee3868debd
3 changed files with 58 additions and 7 deletions
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46
spring-cloud-function-samples/function-sample-cloudevent/src/main/java/io/spring/cloudevent/CloudeventDemoApplication.java
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@@ -16,18 +16,28 @@
package io.spring.cloudevent;
import java.net.URI;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import java.util.function.Function;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.cloud.function.cloudevent.CloudEventAttributes;
import org.springframework.cloud.function.cloudevent.CloudEventAttributesProvider;
import org.springframework.cloud.function.cloudevent.CloudEventMessageUtils;
import org.springframework.cloud.function.web.util.HeaderUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.http.RequestEntity;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.util.Assert;
import org.springframework.web.client.RestTemplate;
/**
* Sample application that demonstrates how user functions can be triggered by cloud event.
@@ -120,11 +130,33 @@ public class CloudeventDemoApplication {
};
}
// @Bean
// public Consumer<SpringReleaseEvent> pojoConsumer(CloudEventAttributesProvider provider) {
// return event -> {
//
// provider.generateDefaultCloudEventHeaders(attributes);
// };
// }
@Bean
public Consumer<Message<SpringReleaseEvent>> pojoConsumer(CloudEventAttributesProvider provider, RestTemplateBuilder builder) {
return eventMessage -> {
RequestEntity<SpringReleaseEvent> entity = RequestEntity.post(URI.create("http://foo.com"))
.headers(HeaderUtils.fromMessage(
new MessageHeaders(CloudEventMessageUtils.generateAttributesWithProvider(eventMessage.getHeaders(), provider))))
.body(eventMessage.getPayload());
List<String> sourceHeader = entity.getHeaders().get("ce-source");
List<String> typeHeader = entity.getHeaders().get("ce-type");
Assert.isTrue(sourceHeader.get(0).equals("https://interface21.com/"), "'source' must be https://interface21.com/");
Assert.isTrue(typeHeader.get(0).equals("com.interface21"), "'source' must be com.interface21");
};
}
@Bean
@ConditionalOnExpression("'${K_SINK:}'!=''")
public Consumer<Message<Map<String, Object>>> sink(CloudEventAttributesProvider provider,
RestTemplateBuilder builder, @Value("${K_SINK}") String url) {
RestTemplate client = builder.build();
return eventMessage -> {
RequestEntity<Map<String, Object>> entity = RequestEntity.post(URI.create("http://foo.com"))
.headers(HeaderUtils.fromMessage(
new MessageHeaders(CloudEventMessageUtils.generateAttributesWithProvider(eventMessage.getHeaders(), provider))))
.body(eventMessage.getPayload());
client.exchange(entity, byte[].class);
};
}
}