[infinispan-issues] [JBoss JIRA] (ISPN-694) Create Expiration Notification

[Galder Zamarreño (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771296#comment-12771296 ] 

Galder Zamarreño commented on ISPN-694:
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>From IRC:

{code}
Apr 29 14:47:51 <pferraro>	mmarkus: whoops - I meant, also ISPN-694
Apr 29 14:47:52 <jbossbot>	jira [ISPN-694] Create Expiration Notification [Reopened (Unresolved) Feature Request, Major, Unassigned] https://issues.jboss.org/browse/ISPN-694
Apr 29 14:49:04 <pferraro>	mmarkus: I'm in the process of redesigning web session clustering for wildfly, and these 2 jiras stand in the way of leveraging infinispan's native expiration and eviction support.
...
Apr 29 18:12:41 <mmarkus1>	pferraro: in the scope of ISPN-694, we'd need to make the CacheStore trigger expiration notifications 
Apr 29 18:12:42 <jbossbot>	jira [ISPN-694] Create Expiration Notification [Reopened (Unresolved) Feature Request, Major, Galder Zamarreño] https://issues.jboss.org/browse/ISPN-694
Apr 29 18:13:25 *	manik has quit (Quit: Leaving.)
Apr 29 18:13:39 <mmarkus1>	pferraro: are you using a CustomCache store or one that exists in Infinispan?
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Apr 29 18:27:34 <pferraro>	mmarkus1: For my case, if the cache entry was already passivated to a cache store, I only need the expiration notification if a subsequent cache get attempts to load it, but it should have expired.
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Apr 29 18:28:21 <pferraro>	mmarkus1: so - for my case, it is enough that the in-memory entries are promptly expired - stuff in the cache store can receive expiration notifications as they are discovered
Apr 29 18:28:38 <pferraro>	mmarkus1: does that make sense?
Apr 29 18:29:55 <pferraro>	mmarkus1: So, currently, I'm not using a custom cache store, but rather an existing cache store that emits an expiration notification if it is ever fetched from the store
Apr 29 18:34:28 <mmarkus1>	pferraro_afk: yes, thanks!
{code}

So, for Paul's use case, expiration notifications for entries in memory is really what's needed.

Give that as discussed in this JIRA, expiration of entries in cache store would require some careful thought, this part will be deferred until the CacheStore interfaces are redesigned in the next big major API review.
                
> Create Expiration Notification
> ------------------------------
>
>                 Key: ISPN-694
>                 URL: https://issues.jboss.org/browse/ISPN-694
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: Eviction
>         Environment: any
>            Reporter: Edouard Boily
>            Assignee: Galder Zamarreño
>         Attachments: 01.patch
>
>
> Create a CacheEntryExpired notification and make EvictionManager send this notification when a cache entry is evicted because it is expired.
> Also mage sure the cache entry value is sent over in the event.
> CacheEntryEvicted notification should also send the entry value in the event.

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