[jboss-jira] [JBoss JIRA] Resolved: (JBCACHE-777) Creating a custom cache loader which delegates to a standard cache loader, can generate misleading WARN messages

[Galder Zamarreno (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBCACHE-777?page=all ]

Galder Zamarreno resolved JBCACHE-777.
--------------------------------------

    Resolution: Done

The level of the CacheLoader WARN message (when using custom) regarding new CacheLoader contract has changed to INFO. The message is still needed for customers to be aware of the CacheLoader interface contract changes added with JBC 1.3.

> Creating a custom cache loader which delegates to a standard cache loader, can generate misleading WARN messages
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: JBCACHE-777
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-777
>             Project: JBoss Cache
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 1.4.0.SP1, 1.3.0.SP3
>            Reporter: Galder Zamarreno
>         Assigned To: Galder Zamarreno
>            Priority: Minor
>             Fix For: 1.4.0.SP2
>
>          Time Spent: 1 hour
>  Remaining Estimate: 0 minutes
>
> FileCacheLoader can return a null value for get(fqn) if the node does not exist.
>  /**
>     * Returns all keys and values from the persistent store, given a fully qualified name.
>     *
>     * NOTE that the expected return value of this method has changed from JBossCache 1.2.x
>     * and before!  This will affect cache loaders written prior to JBossCache 1.3.0 and such
>     * implementations should be checked for compliance with the behaviour expected.
>     *
>     * @param name
>     * @return Map<Object,Object> keys and values for the given node. Returns
>     * null if the node is not found.  If the node is found but has no
>     * attributes, this method returns an empty Map.
>     * @throws Exception
>  */
> If the customer creates a custom cache loader which delegates to a FileCacheLoader, the 
> following misleading warning message is logged:
> 10:52:10.839 WARN [MessageListenerThread - Belvedere/Desk/CacheLoaderInterceptor] CacheLoader.get(Fqn) returned a null; assuming the node nodes not exist.
> 10:52:10.839 WARN [MessageListenerThread - Belvedere/Desk/CacheLoaderInterceptor] The CacheLoader interface has changed since JBossCache 1.3.x
> 10:52:10.839 WARN [MessageListenerThread - Belvedere/Desk/CacheLoaderInterceptor] Please see http://jira.jboss.com/jira/browse/JBCACHE-118
> 10:52:10.849 WARN [MessageListenerThread - Belvedere/Desk/CacheLoaderInterceptor] CacheLoader.get() should return an empty Map if the node does exist but doesn't have any attributes.
> This occurrs even though the FileCacheLoader is actually doing the job accordingly.

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