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Support suspending handler methods in Spring MVC

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This commit adds support for Kotlin Coroutines suspending functions to
Spring MVC, by converting those to a Mono that can then be handled by
the asynchronous request processing feature.

It also optimizes Coroutines detection with the introduction of an
optimized KotlinDetector.isSuspendingFunction() method that does not
require kotlin-reflect.

Closes gh-23611
This commit is contained in:
Sébastien Deleuze
2020-10-09 12:22:15 +02:00
parent fad7243733
commit 94a42a3086
13 changed files with 110 additions and 29 deletions
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3
spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/reactive/InvocableHandlerMethod.java
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@@ -131,8 +131,7 @@ public class InvocableHandlerMethod extends HandlerMethod {
try {
Method method = getBridgedMethod();
ReflectionUtils.makeAccessible(method);
if (KotlinDetector.isKotlinReflectPresent() && KotlinDetector.isKotlinType(method.getDeclaringClass())
&& CoroutinesUtils.isSuspendingFunction(method)) {
if (KotlinDetector.isSuspendingFunction(method)) {
isSuspendingFunction = true;
value = CoroutinesUtils.invokeSuspendingFunction(method, getBean(), args);
}