>
> thanks Ard.
>
> well.. the use-request-parameters was just an example.
> actually, I am writing a reader and I dont want to hardcode a
> value. So,
> thot of passing it from sitemap.
well, for exampla in your sitemap components you define your default settings
like:
<map:reader logger="sitemap.reader.image" name="image" pool-grow="4"
pool-max="32" pool-min="1" src="org.apache.cocoon.reading.ImageReader">
<parameter name="expires" value="86400000"/> // 1 day
</map:reader>
This ImageReader extends the ResourceReader, that for example has in its
configure the following line:
this.configuredExpires = parameters.getParameterAsLong("expires", -1);
Now, when you actually use the ImageReader in a pipeline matcher, for example,
<map:match pattern="readtest">
<map:read src="/foo.gif" type="image">
<map:parameter name="expires" value="60"/>
</map:read>
Now, if in the setup method you have for example,
this.expires = par.getParameterAsLong("expires", this.configuredExpires);
it means that this specific matcher, you have defined a specific expires, and
therefor, you dont take the default configuredExpires, right?
So, if you would have
<map:match pattern="readtest">
<map:read src="/foo.gif" type="image">
</map:read>
you would get the default expires configured.
and with
<map:match pattern="readtest">
<map:read src="/foo.gif" type="image">
<map:parameter name="expires" value="120"/>
</map:read>
you would get 2 minutes expires on what you read instead of 60 sec or 86400000
secs..
Ard
>
> So, where in the sitemap shud I be putting this value and
> where in the
> reader code shud I be reading it?
>
> thanks
>
> -S.
>
>
>
> >From: "Ard Schrijvers" <[EMAIL PROTECTED]>
> >Reply-To: [email protected]
> >To: <[email protected]>
> >Subject: RE: difference betn configuration and parameters
> >Date: Thu, 12 Oct 2006 20:28:48 +0200
> >
> >Hello,
> > >
> > >
> > > Hi,
> > >
> > > I was looking at some of the cocoon source-code that has some
> > > configurable
> > > entries in the sitemap
> > > (eg: ResourceReader, TraxTransformer etc.)
> > >
> > > in the configure method, it retreives the entry from
> sitemap in the
> > > following way,
> > >
> > > Configuration child;
> > > child = conf.getChild("use-request-parameters");
> > > this.useParameters = child.getValueAsBoolean(false);
> > > this._useParameters = this.useParameters;
> >
> >Configuration typically is called during configure of the component
> >(happens already at cocoon start-up, also see
> >http://excalibur.apache.org/framework/lifecycle.html). You
> can see this
> >configuration (in cocoon.xconf) of the component as "global" default
> >configuration of your component. (configure is only called once per
> >instance of the component...I think :-) ).
> >
> >Now, calling a pipeline using this component, like the
> TraxTransformer runs
> >the setup method. During setup, typically, you can override default
> >component behavior, like setting use-request-parameters to
> another value.
> >
> >I don't think you will freq use this for the
> TraxTransformer, but for
> >example for readers it is very common, to define one default
> reader in
> >components in the sitemap with some expires value, and then,
> in specific
> >matchers override this default value.
> >
> >Then, I want to end with my evangelistic remark (I did not
> count, but there
> >must be many) : For the TraxTransformer, never never ever set
> >user-request-parameters to true!!
> >
> >Regards Ard
> >
> > >
> > > and again, in the setup method,
> > >
> > > _useParameters =
> par.getParameterAsBoolean("use-request-parameters",
> > > this.useParameters);
> > >
> > > ----------
> > > whats the difference between the two???
> > > why should we do it 2 times???
> > >
> > > thanks
> > >
> > > -S.
> > >
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