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Posted to solr-user@lucene.apache.org by Mark Robinson <ma...@gmail.com> on 2016/07/02 09:52:47 UTC
Re: Load a java class on start up
Thanks much Andrea esp. for the suggestion of SolrCoreAware!
Best,
Mark.
On Thu, Jun 30, 2016 at 10:23 AM, Andrea Gazzarini <gx...@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
>>
>>
>
Re: Load a java class on start up
Posted by Mark Robinson <ma...@gmail.com>.
Yes.
Integrating my CustomComponent along with SolrCoreAware (I was unaware of
this prev) should give me what I am looking for.
Thanks!
Mark.
On Sat, Jul 2, 2016 at 5:57 AM, Andrea Gazzarini <gx...@gmail.com> wrote:
> You're welcome ;) is that close to what you were looking for?
> On 2 Jul 2016 11:53, "Mark Robinson" <ma...@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 <gx...@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
> > >>
> > >>
> > >
> >
>
Re: Load a java class on start up
Posted by Andrea Gazzarini <gx...@gmail.com>.
You're welcome ;) is that close to what you were looking for?
On 2 Jul 2016 11:53, "Mark Robinson" <ma...@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 <gx...@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
> >>
> >>
> >
>