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GH-680 Add support for strict (or not) dependency on target-protocol header for CE

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Resolves #680
This commit is contained in:
Oleg Zhurakousky
2021-04-14 18:49:01 +02:00
parent b7edd1e1b7
commit 727322b1f0
3 changed files with 27 additions and 3 deletions
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8
spring-cloud-function-context/src/main/java/org/springframework/cloud/function/cloudevent/CloudEventMessageUtils.java
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@@ -275,9 +275,13 @@ public final class CloudEventMessageUtils {
* @return prefix (e.g., 'ce_' or 'ce-' etc.)
*/
static String determinePrefixToUse(Map<String, Object> messageHeaders) {
return determinePrefixToUse(messageHeaders, false);
}
static String determinePrefixToUse(Map<String, Object> messageHeaders, boolean strict) {
String targetProtocol = (String) messageHeaders.get(MessageUtils.TARGET_PROTOCOL);
String prefix = determinePrefixToUse(targetProtocol);
if (StringUtils.hasText(prefix)) {
if (StringUtils.hasText(prefix) && (strict || StringUtils.hasText((String) messageHeaders.get(prefix + _SPECVERSION)))) {
return prefix;
}
else {
@@ -294,7 +298,7 @@ public final class CloudEventMessageUtils {
}
}
return "";
return DEFAULT_ATTR_PREFIX;
}
/**

2
spring-cloud-function-context/src/main/java/org/springframework/cloud/function/cloudevent/CloudEventsFunctionInvocationHelper.java
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@@ -90,7 +90,7 @@ public class CloudEventsFunctionInvocationHelper implements FunctionInvocationHe
if (this.messageConverter != null && CLOUD_EVENT_CLASS != null && CLOUD_EVENT_CLASS.isAssignableFrom(result.getClass())) {
convertedResult = this.messageConverter.toMessage(result, input.getHeaders());
}
String targetPrefix = CloudEventMessageUtils.determinePrefixToUse(input.getHeaders());
String targetPrefix = CloudEventMessageUtils.determinePrefixToUse(input.getHeaders(), true);
return this.doPostProcessResult(convertedResult, targetPrefix);
}

20
spring-cloud-function-context/src/test/java/org/springframework/cloud/function/cloudevent/CloudEventMessageUtilsAndBuilderTests.java
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@@ -31,6 +31,26 @@ import static org.assertj.core.api.Assertions.assertThat;
*/
public class CloudEventMessageUtilsAndBuilderTests {
@Test// see https://github.com/spring-cloud/spring-cloud-function/issues/680
public void testProperAttributeExtractionRegardlessOfTargetProtocol() {
Message<String> ceMessage = CloudEventMessageBuilder.withData("foo").build();
ceMessage = MessageBuilder.fromMessage(ceMessage).setHeader("target-protocol", "kafka").build();
String prefix = CloudEventMessageUtils.determinePrefixToUse(ceMessage.getHeaders());
assertThat(prefix).isEqualTo("ce-");
prefix = CloudEventMessageUtils.determinePrefixToUse(ceMessage.getHeaders(), true);
assertThat(prefix).isEqualTo("ce_");
String specVersion = CloudEventMessageUtils.getSpecVersion(ceMessage);
assertThat(specVersion).isEqualTo("1.0");
String type = CloudEventMessageUtils.getType(ceMessage);
assertThat(type).isEqualTo("java.lang.String");
String id = CloudEventMessageUtils.getId(ceMessage);
assertThat(id).isNotNull();
URI source = CloudEventMessageUtils.getSource(ceMessage);
assertThat(source.toString()).isEqualTo("https://spring.io/");
}
@Test
public void testAttributeRecognitionAndCanonicalization() {
Message<String> httpMessage = MessageBuilder.withPayload("hello")