Karl - you can get the core from SolrQueryRequest#getCore(), with
SolrQueryRequest being passed into QParserPlugin#createParser.
Erik
On Jan 11, 2012, at 01:29 , <[email protected]> <[email protected]>
wrote:
> "SolrCoreAware" and "CloseHook" are related in that you need a SolrCore
> object in order to call SolrCore.addCloseHook(). Indeed, the javadoc for the
> CloseHook interface states that the expected way you are supposed to use this
> in a plugin is via something like this:
>
> public void inform(SolrCore core)
> {
> core.addCloseHook(new MyCloseHookInstance());
> }
>
> If you have another way I can get hold of the right SolrCore object from
> within a QParserPlugin, please let me know. I've opened SOLR-3015 to track
> this issue.
>
> Karl
>
> ________________________________________
> From: ext Chris Hostetter [[email protected]]
> Sent: Tuesday, January 03, 2012 12:55 PM
> To: [email protected]
> Subject: RE: Solr plugin component resource cleanup?
>
> : This works fine for a SearchComponent, but if I try this for a
> QParserPlugin I get the following:
> :
> : [junit] org.apache.solr.common.SolrException: Invalid 'Aware'
> : object: org.apache.solr.mcf.ManifoldCFQParserPlugin@18941f7 --
> : org.apache.solr.util.plugin.SolrCoreAware must be an instance of:
>
> ...that seems like an orthoginal problem to what i suggested...
>
> : take a look at the "CloseHook" API and SolrCore.addCloseHook(...)
> :
> : : Is there a preferred time/manner for a Solr component (e.g. a
> : : SearchComponent) to clean up resources that have been allocated during
> : : the time of its existence, other than via a finalizer? There seems to
>
>
> ...any object can call SolrCore.addCloseHook, regardless of wether or not
> that class implements SolrCoreAware (two ideas are unrelated). The list
> of classes that implement SolrCoreAware has always been limited
> to prevent circular lifecycle problems.
>
> what type of resouces are you trying to clean up? are they really
> specific to the initialization of the QParserPlugin (which shoulds *VERY*
> unusual), or to the QParsers that it creates? because you can always call
> addCloseHook in the createParser method.
>
>
>
> -Hoss
>
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