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From Andrea Gazzarini <gxs...@gmail.com>
Subject Re: Load a java class on start up
Date Sat, 02 Jul 2016 09:57:06 GMT
You're welcome ;) is that close to what you were looking for?
On 2 Jul 2016 11:53, "Mark Robinson" <mark123learns@gmail.com> wrote:

> Thanks much Andrea esp. for the suggestion of SolrCoreAware!
>
>
>
> Best,
> Mark.
>
> On Thu, Jun 30, 2016 at 10:23 AM, Andrea Gazzarini <gxsubs@gmail.com>
> wrote:
>
> > Hi,
> > the lifecycle of your Solr extension (i.e. the component) is not
> something
> > that's up to you.
> > Before designing the component you should read the framework docs [1], in
> > order to understand the context where it will live, once deployed.
> >
> > There's nothing, as far as I know, other than the component callbacks
> > (e.g. the inform, init methods) that can help you to manage the lifecycle
> > of a custom class you're using within the component. Look at the
> > SolrCoreAware [2] interface, maybe it could fit your needs.
> > From what you write it seems you could need something like a singleton
> > (which is often an anti-pattern in distributed environment) , but without
> > further details I'm just shooting in the dark
> >
> > In addition: you wrote a component so I guess it shouldn't be so hard to
> > have a look at one of the existing built-in components. I'm quite sure
> they
> > already met (and solved) a similar issue.
> >
> > Best,
> > Andrea
> >
> > [1]
> >
> https://lucene.apache.org/solr/6_1_0/solr-core/org/apache/solr/handler/component/SearchComponent.html
> > [2] https://wiki.apache.org/solr/SolrPlugins#SolrCoreAware
> >
> >
> > On 30/06/16 16:00, Mark Robinson wrote:
> >
> >> Hi,
> >>
> >> I have a java OBJECT which I need to load once.
> >> I have written a java custom component, which I have added in
> >> "last-components" in solrconfig.xml, from which I want to access the
> above
> >> mentioned OBJECT when each search request comes in.
> >>
> >> Is there a way I can load a java object on server/ instance startup?
> >> OR
> >> Load it when the first call comes to SOLR?
> >>
> >> For the time being I created that Java object inside the custom
> component
> >> itself; but it is loaded each time a search request comes in.
> >>
> >> Could some one pls give some pointers on how my above requirement can be
> >> achieved in SOLR?
> >>
> >> Thanks!
> >> Mark
> >>
> >>
> >
>

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