Support for interception of controller method invocation after binding has completed [SPR-7793]

[spring-projects-issues]

Mark Pollack opened SPR-7793 and commented

Other MVC framework such as Ruby on Rails and ASP.NET MVC support interception after parameter binding has occured. Spring MVC should support this extension point. The use case driving this are storing of MVC event analytics data in NoSQL databases such as MongoDB. The current filter support in MVC is before binding has taken place and therefore harder to access information that will be converted to objects at the time of controller invocation.

See https://github.com/SpringSource/spring-data-document/tree/master/spring-data-document-core/src/main/java/org/springframework/data/document/web/servlet

for an example implementation.

These are called 'action filters' in Ruby on Rails/ASP.NET MVC

http://guides.rubyonrails.org/action_controller_overview.html

http://www.asp.net/mvc/tutorials/understanding-action-filters-cs

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Affects: 3.0 GA

Issue Links:

• @MVC should provide an "onBind" hook prior to automatic validation [SPR-6437] #11103 @MVC should provide an "onBind" hook prior to automatic validation ("duplicates")

[spring-projects-issues]

Rossen Stoyanchev commented

The same request and further suggested approaches in #11103.

[spring-projects-issues]

Rossen Stoyanchev commented

Mark, I am resolving this as duplicate of #11103. Please, see these two comments.

Essentially you have two options:

1. For controller-specific needs, avoid use of @Valid, inject the validator in the controller, and apply the required logic before validation.
2. For needs that apply across controllers, consider configuring a variant of ServletModelMethodProcessor, which provides hooks around data binding and validation.