60 lines
1.4 KiB
Plaintext
60 lines
1.4 KiB
Plaintext
A Spring ``++@Controller++`` that uses ``++@SessionAttributes++`` is designed to handle a stateful / multi-post form. Such ``++@Controller++``s use the specified ``++@SessionAttributes++`` to store data on the server between requests. That data should be cleaned up when the session is over, but unless ``++setComplete()++`` is called on the ``++SessionStatus++`` object from a ``++@RequestMapping++`` method, neither Spring nor the JVM will know it's time to do that. Note that the ``++SessionStatus++`` object must be passed to that method as a parameter.
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== Noncompliant Code Example
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----
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@Controller
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@SessionAttributes("hello") // Noncompliant; this doesn't get cleaned up
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public class HelloWorld {
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@RequestMapping("/greet", method = GET)
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public String greet(String greetee) {
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return "Hello " + greetee;
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}
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}
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----
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== Compliant Solution
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----
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@Controller
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@SessionAttributes("hello")
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public class HelloWorld {
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@RequestMapping("/greet", method = GET)
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public String greet(String greetee) {
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return "Hello " + greetee;
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}
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@RequestMapping("/goodbye", method = POST)
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public String goodbye(SessionStatus status) {
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//...
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status.setComplete();
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}
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}
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----
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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include::message.adoc[]
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include::highlighting.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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