[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-4660) Support Cache Retrieve Mode and Cache Store Mode Properties

[Steve Ebersole (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35296#action_35296 ] 

Steve Ebersole commented on HHH-4660:
-------------------------------------

another one bites the dust

> Support Cache Retrieve Mode and Cache Store Mode Properties
> -----------------------------------------------------------
>
>                 Key: HHH-4660
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4660
>             Project: Hibernate Core
>          Issue Type: Sub-task
>          Components: caching (L2), entity-manager
>            Reporter: Emmanuel Bernard
>            Assignee: Steve Ebersole
>             Fix For: 3.5.0-Beta-4
>
>          Time Spent: 4 hours, 3 minutes
>  Remaining Estimate: 0 minutes
>
> Specified by section 3.7.2
> Essentially analogous to the older Hibernate notion of org.hibernate.CacheMode, except that JPA splits the read and write phases into separate discrete values for retrieving and storing.
> In terms of specifying "retrieval behavior", users would use the "javax.persistence.cache.retrieveMode" (org.hibernate.ejb.AvailableSettings#SHARED_CACHE_RETRIEVE_MODE) property, with a value corresponding to one of the javax.persistence.CacheRetrieveMode enum values.
> For "storage behavior", there is the javax.persistence.cache.storeMode (org.hibernate.ejb.AvailableSettings#SHARED_CACHE_STORE_MODE) property and the corresponding javax.persistence.CacheStoreMode enum values.
> These values cannot be specified on the EMF, so each EM starts with a fresh default set of behaviors (javax.persistence.CacheRetrieveMode#USE and javax.persistence.CacheStoreMode#USE).  The default for a given EM can be altered using EntityManager#setProperty
> It is also valid to alter either (or both) the retrieval or storage behavior via:
> * any of the EntityManager#find methods taking a Map of hints; valid for both retrieve and store.
> * any of the EntityManager#refresh methods taking a Map of hints; only valid for store, as refresh always hits the database (retrieveMode is ignored)
> * Query/TypedQuery#setHint; valid for both retrieve and store.

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