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Posted to user@nutch.apache.org by Kaiwii Ho <ka...@gmail.com> on 2011/08/25 05:31:12 UTC
Why URLNormalizer doesn't implement the Pluggable?
I'm a freshman learning about the nutch.
Here,I have serval questions:
1、URLNormalizer is a kind of a ExtensionPoint.But why does it implement the
Pluggable as other extensionpoint does?And further-more,do any difference
exist between the URLNormalizer and the other ExtensionPoint leading
the URLNormalizer's not implementing the Pluggable?
2、while URLNormalizer not implementing the Pluggable,everything seems to
work well.So,I wonder whether it is necessary to make the extensionpoint
implement the Pluggable?
Waiting for ur answer.And thank u!
Re: Why URLNormalizer doesn't implement the Pluggable?
Posted by Julien Nioche <li...@gmail.com>.
Resending your messages every hour won't get you more answers - at the
opposite
On 26 August 2011 09:28, Kaiwii Ho <ka...@gmail.com> wrote:
>
> I'm a freshman learning about the nutch.
> Here,I have serval questions:
> 1、URLNormalizer is a kind of a ExtensionPoint.But why does it implement the
> Pluggable as other extensionpoint does?And further-more,do any difference
> exist between the URLNormalizer and the other ExtensionPoint leading
> the URLNormalizer's not implementing the Pluggable?
> 2、while URLNormalizer not implementing the Pluggable,everything seems to
> work well.So,I wonder whether it is necessary to make the extensionpoint
> implement the Pluggable?
>
> Is it a bug or a specified trick?
>
> Waiting for ur answer.And thank u!
>
>
--
*
*Open Source Solutions for Text Engineering
http://digitalpebble.blogspot.com/
http://www.digitalpebble.com
Why URLNormalizer doesn't implement the Pluggable?
Posted by Kaiwii Ho <ka...@gmail.com>.
I'm a freshman learning about the nutch.
Here,I have serval questions:
1、URLNormalizer is a kind of a ExtensionPoint.But why does it implement the
Pluggable as other extensionpoint does?And further-more,do any difference
exist between the URLNormalizer and the other ExtensionPoint leading
the URLNormalizer's not implementing the Pluggable?
2、while URLNormalizer not implementing the Pluggable,everything seems to
work well.So,I wonder whether it is necessary to make the extensionpoint
implement the Pluggable?
Is it a bug or a specified trick?
Waiting for ur answer.And thank u!
Re: Why URLNormalizer doesn't implement the Pluggable?
Posted by Kaiwii Ho <ka...@gmail.com>.
thank u alot.But,anyway,I am still curious why the developer of the nutch
not treat the UrlNormalizer as the others do.Is it a bug or a specified
trick?
On Thu, Aug 25, 2011 at 5:09 PM, lewis john mcgibbney <
lewis.mcgibbney@gmail.com> wrote:
> Hi Kaiwii,
>
> If you look at nutch-extensionpoints/plugin.xml you will see a short
> comment
> which states "...that plugins can define extension points as well to be
> extendable". The the case of the ulrnormalizer series of plugins we can
> specify settings (within nutch-site.xml) for which urlnormalizer plugins we
> wish to use, in which order we wish to use them, etc.
>
> On Thu, Aug 25, 2011 at 4:31 AM, Kaiwii Ho <ka...@gmail.com> wrote:
>
> > I'm a freshman learning about the nutch.
> > Here,I have serval questions:
> > 1、URLNormalizer is a kind of a ExtensionPoint.But why does it implement
> the
> > Pluggable as other extensionpoint does?
>
>
>
> > And further-more,do any difference
> > exist between the URLNormalizer and the other ExtensionPoint leading
> > the URLNormalizer's not implementing the Pluggable?
> >
>
> The honest truth here is I don't know, however I what difference would you
> expect to get from comparing a pluggable urlnormalizer with accessing the
> nutch-extensionpoint directly... is there any reason for this... IMHO it
> would be easier to utilise the functionality of a particular plugin in the
> usual way, through nutch-site.xml
>
> 2、while URLNormalizer not implementing the Pluggable,everything seems to
> > work well.So,I wonder whether it is necessary to make the extensionpoint
> > implement the Pluggable?
> >
>
> As above...
>
> >
> > Waiting for ur answer.And thank u!
> >
>
>
> --
> *Lewis*
>
Re: Why URLNormalizer doesn't implement the Pluggable?
Posted by lewis john mcgibbney <le...@gmail.com>.
Hi Kaiwii,
If you look at nutch-extensionpoints/plugin.xml you will see a short comment
which states "...that plugins can define extension points as well to be
extendable". The the case of the ulrnormalizer series of plugins we can
specify settings (within nutch-site.xml) for which urlnormalizer plugins we
wish to use, in which order we wish to use them, etc.
On Thu, Aug 25, 2011 at 4:31 AM, Kaiwii Ho <ka...@gmail.com> wrote:
> I'm a freshman learning about the nutch.
> Here,I have serval questions:
> 1、URLNormalizer is a kind of a ExtensionPoint.But why does it implement the
> Pluggable as other extensionpoint does?
> And further-more,do any difference
> exist between the URLNormalizer and the other ExtensionPoint leading
> the URLNormalizer's not implementing the Pluggable?
>
The honest truth here is I don't know, however I what difference would you
expect to get from comparing a pluggable urlnormalizer with accessing the
nutch-extensionpoint directly... is there any reason for this... IMHO it
would be easier to utilise the functionality of a particular plugin in the
usual way, through nutch-site.xml
2、while URLNormalizer not implementing the Pluggable,everything seems to
> work well.So,I wonder whether it is necessary to make the extensionpoint
> implement the Pluggable?
>
As above...
>
> Waiting for ur answer.And thank u!
>
--
*Lewis*