1
16
17 package org.springframework.cloud.aws.messaging.endpoint;
18
19 import com.fasterxml.jackson.databind.JsonNode;
20
21 import org.springframework.cloud.aws.messaging.config.annotation.NotificationSubject;
22 import org.springframework.core.MethodParameter;
23 import org.springframework.http.HttpInputMessage;
24 import org.springframework.util.ClassUtils;
25
26
29 public class NotificationSubjectHandlerMethodArgumentResolver
30 extends AbstractNotificationMessageHandlerMethodArgumentResolver {
31
32 @Override
33 public boolean supportsParameter(MethodParameter parameter) {
34 return (parameter.hasParameterAnnotation(NotificationSubject.class)
35 && ClassUtils.isAssignable(String.class, parameter.getParameterType()));
36 }
37
38 @Override
39 protected Object doResolveArgumentFromNotificationMessage(JsonNode content,
40 HttpInputMessage request, Class<?> parameterType) {
41 if (!"Notification".equals(content.get("Type").asText())) {
42 throw new IllegalArgumentException(
43 "@NotificationMessage annotated parameters are only allowed for method that receive a notification message.");
44 }
45 return content.findPath("Subject").asText();
46 }
47
48 }
49