using Grails 2 Web Flow plugin for a shared nothing architecture [closed]

Question

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.

Closed 9 years ago.

I am using grails 2.2 for a large, non trivial web application, with “shared nothing” approach. I find Grails plugin -> grails Web flows very useful , however I cannot store the conversation state in the user session. Is there a way to store this in external storage such as memcached or Coherence*Web?

Note: shared nothing means not storing any information in Http session of a Java EE web engine, so as to avoid need for replication of session information in a clustered environment.

Answer 1

The Web Flow plugin provides a bean called conversionManager which is defined like:

conversationManager(SessionBindingConversationManager)

This default implementation of the ConversationManager interface stores conversations in the session. You can replace this implementation with one that stores conversations elsewhere (such as in Coherence) by defining a bean of the same name in grails-app/conf/spring/resources.groovy:

conversationManager(CoherenceConversationManager)

Note that "CoherenceConversationManager" doesn't exist as far as I know, you would need to implement this yourself.