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Merge pull request #24386 from hyeonisism/Simplify-use-compute-if-absent

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Closes gh-24386
This commit is contained in:
Rossen Stoyanchev
2020-02-03 20:59:49 +00:00
parent adbc55e72a e7d40f930f
commit d8cd46121a
1 changed files with 4 additions and 13 deletions
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17
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2019 the original author or authors.
* Copyright 2002-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -821,18 +821,9 @@ public class RequestMappingHandlerAdapter extends AbstractHandlerMethodAdapter
* (never {@code null}).
*/
private SessionAttributesHandler getSessionAttributesHandler(HandlerMethod handlerMethod) {
Class<?> handlerType = handlerMethod.getBeanType();
SessionAttributesHandler sessionAttrHandler = this.sessionAttributesHandlerCache.get(handlerType);
if (sessionAttrHandler == null) {
synchronized (this.sessionAttributesHandlerCache) {
sessionAttrHandler = this.sessionAttributesHandlerCache.get(handlerType);
if (sessionAttrHandler == null) {
sessionAttrHandler = new SessionAttributesHandler(handlerType, this.sessionAttributeStore);
this.sessionAttributesHandlerCache.put(handlerType, sessionAttrHandler);
}
}
}
return sessionAttrHandler;
return this.sessionAttributesHandlerCache.computeIfAbsent(
handlerMethod.getBeanType(),
type -> new SessionAttributesHandler(type, this.sessionAttributeStore));
}
/**