query filter ordering

[c wanek <sp...@gmail.com>]

Is there a way I can configure a particular order to the Nutch query
filters, and if so how?

I would like to modify the query *after* the BasicQueryFilter has done its
work.  My filter was working this way with version 0.8, but now in 0.9, my
filter seems to be getting invoked before BasicQueryFilter.

I thought I saw something about this someplace in the docs, but now can't
find it.

Thanks
Charlie

Re: query filter ordering

[c wanek <sp...@gmail.com>]

Not finding any documentation about ordering, I thought I'd extend
BasicQueryFilter to include my added query functionality.  It seems this
would be cleaner anyway.

But now I see something that looks like a bug in the plugin mechanism.

In nutch-site.xml I configured query-basic to be ignored and my plugin to be
included in the plugin.includes property, something like this (edited for
clarity):
<property>
   <name>plugin.includes</name>
   <value>...|query-(site|url)|query-myfilter|...</value>


But because I extend the functionality of query-basic, it is a dependency
for my plugin, so I include that in the my plugin.xml file:
    <requires>
    <import plugin="nutch-extensionpoints"/>
    <import plugin="query-basic"/>
  </requires>

So what I think is the bug is that the query-basic filter is run anyway,
independently of mine.  So my filter runs, and I build clauses much like
query-basic does, and after that, query-basic runs, adding its own clauses
to the query.

It seems to me that if query-basic is not in the plugin-includes property,
it should not get invoked in the series of query filters.  Is the behavior
I'm observing really by design?

Thx




On 4/27/07, c wanek <sp...@gmail.com> wrote:
>
> Is there a way I can configure a particular order to the Nutch query
> filters, and if so how?
>
> I would like to modify the query *after* the BasicQueryFilter has done its
> work.  My filter was working this way with version 0.8, but now in 0.9, my
> filter seems to be getting invoked before BasicQueryFilter.
>
> I thought I saw something about this someplace in the docs, but now can't
> find it.
>
> Thanks
> Charlie
>