[Lift] Re: Potential LiftRules dispatch issue.

2009-01-28 Thread Tim Perrett

On this note, I wrote an image cache for use in conjunction with
MappedBinary - if anyone is interested I'm happy to post the code. It
uses EHCache and first checks the cache for the right image, and grabs
it if it's there, otherwise it does the database read. If your needing
to store images in the database, using an object cache can vastly cut
the amount of DB access and reduce server load

Cheers

Tim

On Jan 28, 12:00 am, Alli  wrote:
> Thanks, will definitely order a PDF or your book when it's out.
>
> Cheers,
> Alli
>
> On Jan 27, 11:56 pm, David Pollak 
> wrote:
>
> > On Tue, Jan 27, 2009 at 3:53 PM, Alli  wrote:
>
> > > Is it possible to make the extension a wild card somehow, e.g.
> > > if i want jpg,png,gif,bmp ?
>
> > LiftRules.dispatch.append {
> >  case r @ Req("picture" :: fileName :: Nil, extension, GetRequest) if
> > List("jpg", "png", "gif").contains(extension) => () =>
> >     ...
>
> > }
>
> > Note that this is not a speed-optimal solution (you'd pre-populate set with
> > the valid extensions).  But it demonstrates using extractors and guards...
> > the stuff I'm writing about this very day in *Beginning Scala*.
>
> > Thanks,
> > David
>
> > > On Jan 27, 11:50 pm, Alli  wrote:
> > > > Thanks chaps, can't believe i didn't spot it :).
>
> > > > Cheers,
> > > > Alfred
>
> > > > On Jan 27, 11:48 pm, Tim Perrett  wrote:
>
> > > > > Change the req to this:
>
> > > > > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
>
> > > > > That should then work for you
>
> > > > > Cheers, Tim
>
> > > > > On Jan 27, 11:39 pm, Alli  wrote:
>
> > > > > > LiftRules.dispatch.append {
> > > > > >   case r @ Req("picture" :: fileName :: Nil, "", GetRequest) => () 
> > > > > > =>
> > > > > >      ...
>
> > > > > > }
>
> > --
> > Lift, the simply functional web frameworkhttp://liftweb.net
> > Beginning 
> > Scalahttp://www.amazon.com/Beginning-Scala-David-Pollak/dp/1430219890/ref=...
> > Follow me:http://twitter.com/dpp
> > Git some:http://github.com/dpp
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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-28 Thread Joachim A.

Hi,
I'd be interested to have  a look at the code :)
I was about to do the same. I'd planned to use a simple cache (by uuid) in a 
concurrent, weak map but EHCache might be the better solution, I guess.

Thanks a lot,
Joachim

> On this note, I wrote an image cache for use in conjunction with
> MappedBinary - if anyone is interested I'm happy to post the code. It
> uses EHCache and first checks the cache for the right image, and grabs
> it if it's there, otherwise it does the database read. If your needing
> to store images in the database, using an object cache can vastly cut
> the amount of DB access and reduce server load
>
> Cheers
>
> Tim
>
> On Jan 28, 12:00 am, Alli  wrote:
> > Thanks, will definitely order a PDF or your book when it's out.
> >
> > Cheers,
> > Alli
> >
> > On Jan 27, 11:56 pm, David Pollak 
> >
> > wrote:
> > > On Tue, Jan 27, 2009 at 3:53 PM, Alli  wrote:
> > > > Is it possible to make the extension a wild card somehow, e.g.
> > > > if i want jpg,png,gif,bmp ?
> > >
> > > LiftRules.dispatch.append {
> > >  case r @ Req("picture" :: fileName :: Nil, extension, GetRequest) if
> > > List("jpg", "png", "gif").contains(extension) => () =>
> > >     ...
> > >
> > > }
> > >
> > > Note that this is not a speed-optimal solution (you'd pre-populate set
> > > with the valid extensions).  But it demonstrates using extractors and
> > > guards... the stuff I'm writing about this very day in *Beginning
> > > Scala*.
> > >
> > > Thanks,
> > > David
> > >
> > > > On Jan 27, 11:50 pm, Alli  wrote:
> > > > > Thanks chaps, can't believe i didn't spot it :).
> > > > >
> > > > > Cheers,
> > > > > Alfred
> > > > >
> > > > > On Jan 27, 11:48 pm, Tim Perrett  wrote:
> > > > > > Change the req to this:
> > > > > >
> > > > > > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
> > > > > >
> > > > > > That should then work for you
> > > > > >
> > > > > > Cheers, Tim
> > > > > >
> > > > > > On Jan 27, 11:39 pm, Alli  wrote:
> > > > > > > LiftRules.dispatch.append {
> > > > > > >   case r @ Req("picture" :: fileName :: Nil, "", GetRequest) =>
> > > > > > > () => ...
> > > > > > >
> > > > > > > }


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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-28 Thread David Pollak
IMHO, a third party cache is a huge waste.

Lift has net.liftweb.util.LRU for this purpose.


On Wed, Jan 28, 2009 at 11:33 AM, Joachim A.
wrote:

>
> Hi,
> I'd be interested to have  a look at the code :)
> I was about to do the same. I'd planned to use a simple cache (by uuid) in
> a
> concurrent, weak map but EHCache might be the better solution, I guess.
>
> Thanks a lot,
> Joachim
>
> > On this note, I wrote an image cache for use in conjunction with
> > MappedBinary - if anyone is interested I'm happy to post the code. It
> > uses EHCache and first checks the cache for the right image, and grabs
> > it if it's there, otherwise it does the database read. If your needing
> > to store images in the database, using an object cache can vastly cut
> > the amount of DB access and reduce server load
> >
> > Cheers
> >
> > Tim
> >
> > On Jan 28, 12:00 am, Alli  wrote:
> > > Thanks, will definitely order a PDF or your book when it's out.
> > >
> > > Cheers,
> > > Alli
> > >
> > > On Jan 27, 11:56 pm, David Pollak 
> > >
> > > wrote:
> > > > On Tue, Jan 27, 2009 at 3:53 PM, Alli  wrote:
> > > > > Is it possible to make the extension a wild card somehow, e.g.
> > > > > if i want jpg,png,gif,bmp ?
> > > >
> > > > LiftRules.dispatch.append {
> > > >  case r @ Req("picture" :: fileName :: Nil, extension, GetRequest) if
> > > > List("jpg", "png", "gif").contains(extension) => () =>
> > > > ...
> > > >
> > > > }
> > > >
> > > > Note that this is not a speed-optimal solution (you'd pre-populate
> set
> > > > with the valid extensions).  But it demonstrates using extractors and
> > > > guards... the stuff I'm writing about this very day in *Beginning
> > > > Scala*.
> > > >
> > > > Thanks,
> > > > David
> > > >
> > > > > On Jan 27, 11:50 pm, Alli  wrote:
> > > > > > Thanks chaps, can't believe i didn't spot it :).
> > > > > >
> > > > > > Cheers,
> > > > > > Alfred
> > > > > >
> > > > > > On Jan 27, 11:48 pm, Tim Perrett  wrote:
> > > > > > > Change the req to this:
> > > > > > >
> > > > > > > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
> > > > > > >
> > > > > > > That should then work for you
> > > > > > >
> > > > > > > Cheers, Tim
> > > > > > >
> > > > > > > On Jan 27, 11:39 pm, Alli  wrote:
> > > > > > > > LiftRules.dispatch.append {
> > > > > > > >   case r @ Req("picture" :: fileName :: Nil, "", GetRequest)
> =>
> > > > > > > > () => ...
> > > > > > > >
> > > > > > > > }
>
>
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-28 Thread Tim Perrett
Oh I really wasn't aware of that... I'll take a look at it - I use  
ehcache for a lot in general, so in that sense it's less if a waste  
for me :-)

Sent from my iPhone

On 28 Jan 2009, at 19:35, David Pollak   
wrote:

> IMHO, a third party cache is a huge waste.
>
> Lift has net.liftweb.util.LRU for this purpose.
>
>
> On Wed, Jan 28, 2009 at 11:33 AM, Joachim A.  > wrote:
>
> Hi,
> I'd be interested to have  a look at the code :)
> I was about to do the same. I'd planned to use a simple cache (by  
> uuid) in a
> concurrent, weak map but EHCache might be the better solution, I  
> guess.
>
> Thanks a lot,
> Joachim
>
> > On this note, I wrote an image cache for use in conjunction with
> > MappedBinary - if anyone is interested I'm happy to post the code.  
> It
> > uses EHCache and first checks the cache for the right image, and  
> grabs
> > it if it's there, otherwise it does the database read. If your  
> needing
> > to store images in the database, using an object cache can vastly  
> cut
> > the amount of DB access and reduce server load
> >
> > Cheers
> >
> > Tim
> >
> > On Jan 28, 12:00 am, Alli  wrote:
> > > Thanks, will definitely order a PDF or your book when it's out.
> > >
> > > Cheers,
> > > Alli
> > >
> > > On Jan 27, 11:56 pm, David Pollak 
> > >
> > > wrote:
> > > > On Tue, Jan 27, 2009 at 3:53 PM, Alli   
> wrote:
> > > > > Is it possible to make the extension a wild card somehow, e.g.
> > > > > if i want jpg,png,gif,bmp ?
> > > >
> > > > LiftRules.dispatch.append {
> > > >  case r @ Req("picture" :: fileName :: Nil, extension,  
> GetRequest) if
> > > > List("jpg", "png", "gif").contains(extension) => () =>
> > > > ...
> > > >
> > > > }
> > > >
> > > > Note that this is not a speed-optimal solution (you'd pre- 
> populate set
> > > > with the valid extensions).  But it demonstrates using  
> extractors and
> > > > guards... the stuff I'm writing about this very day in  
> *Beginning
> > > > Scala*.
> > > >
> > > > Thanks,
> > > > David
> > > >
> > > > > On Jan 27, 11:50 pm, Alli  wrote:
> > > > > > Thanks chaps, can't believe i didn't spot it :).
> > > > > >
> > > > > > Cheers,
> > > > > > Alfred
> > > > > >
> > > > > > On Jan 27, 11:48 pm, Tim Perrett   
> wrote:
> > > > > > > Change the req to this:
> > > > > > >
> > > > > > > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
> > > > > > >
> > > > > > > That should then work for you
> > > > > > >
> > > > > > > Cheers, Tim
> > > > > > >
> > > > > > > On Jan 27, 11:39 pm, Alli  wrote:
> > > > > > > > LiftRules.dispatch.append {
> > > > > > > >   case r @ Req("picture" :: fileName :: Nil, "",  
> GetRequest) =>
> > > > > > > > () => ...
> > > > > > > >
> > > > > > > > }
>
>
>
>
>
>
> -- 
> Lift, the simply functional web framework http://liftweb.net
> Beginning Scala http://www.apress.com/book/view/1430219890
> Follow me: http://twitter.com/dpp
> Git some: http://github.com/dpp
>
> >

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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-28 Thread Tim Perrett

woot! David, that was a great tip, just reduced the LOC and it works
just the same - my cache now looks like:

object ProductCache extends KeyedCache[List[String], Product](1000,
Full(0.75f),
  (in: List[String]) => Product.find(By(Product.permanent_link,
in.last))
)

Then i have a little helper object which just selects the thumbnail or
the large image based on a passed parameter. I cant believe i never
knew these existed... learn something everday i guess!

Cheers

Tim

On Jan 28, 9:29 pm, Tim Perrett  wrote:
> Oh I really wasn't aware of that... I'll take a look at it - I use  
> ehcache for a lot in general, so in that sense it's less if a waste  
> for me :-)
>
> Sent from my iPhone
>
> On 28 Jan 2009, at 19:35, David Pollak   
> wrote:
>
> > IMHO, a third party cache is a huge waste.
>
> > Lift has net.liftweb.util.LRU for this purpose.
>
> > On Wed, Jan 28, 2009 at 11:33 AM, Joachim A.  > > wrote:
>
> > Hi,
> > I'd be interested to have  a look at the code :)
> > I was about to do the same. I'd planned to use a simple cache (by  
> > uuid) in a
> > concurrent, weak map but EHCache might be the better solution, I  
> > guess.
>
> > Thanks a lot,
> > Joachim
>
> > > On this note, I wrote an image cache for use in conjunction with
> > > MappedBinary - if anyone is interested I'm happy to post the code.  
> > It
> > > uses EHCache and first checks the cache for the right image, and  
> > grabs
> > > it if it's there, otherwise it does the database read. If your  
> > needing
> > > to store images in the database, using an object cache can vastly  
> > cut
> > > the amount of DB access and reduce server load
>
> > > Cheers
>
> > > Tim
>
> > > On Jan 28, 12:00 am, Alli  wrote:
> > > > Thanks, will definitely order a PDF or your book when it's out.
>
> > > > Cheers,
> > > > Alli
>
> > > > On Jan 27, 11:56 pm, David Pollak 
>
> > > > wrote:
> > > > > On Tue, Jan 27, 2009 at 3:53 PM, Alli   
> > wrote:
> > > > > > Is it possible to make the extension a wild card somehow, e.g.
> > > > > > if i want jpg,png,gif,bmp ?
>
> > > > > LiftRules.dispatch.append {
> > > > >  case r @ Req("picture" :: fileName :: Nil, extension,  
> > GetRequest) if
> > > > > List("jpg", "png", "gif").contains(extension) => () =>
> > > > >     ...
>
> > > > > }
>
> > > > > Note that this is not a speed-optimal solution (you'd pre-
> > populate set
> > > > > with the valid extensions).  But it demonstrates using  
> > extractors and
> > > > > guards... the stuff I'm writing about this very day in  
> > *Beginning
> > > > > Scala*.
>
> > > > > Thanks,
> > > > > David
>
> > > > > > On Jan 27, 11:50 pm, Alli  wrote:
> > > > > > > Thanks chaps, can't believe i didn't spot it :).
>
> > > > > > > Cheers,
> > > > > > > Alfred
>
> > > > > > > On Jan 27, 11:48 pm, Tim Perrett   
> > wrote:
> > > > > > > > Change the req to this:
>
> > > > > > > > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
>
> > > > > > > > That should then work for you
>
> > > > > > > > Cheers, Tim
>
> > > > > > > > On Jan 27, 11:39 pm, Alli  wrote:
> > > > > > > > > LiftRules.dispatch.append {
> > > > > > > > >   case r @ Req("picture" :: fileName :: Nil, "",  
> > GetRequest) =>
> > > > > > > > > () => ...
>
> > > > > > > > > }
>
> > --
> > Lift, the simply functional web frameworkhttp://liftweb.net
> > Beginning Scalahttp://www.apress.com/book/view/1430219890
> > Follow me:http://twitter.com/dpp
> > Git some:http://github.com/dpp
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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-27 Thread David Pollak
On Tue, Jan 27, 2009 at 3:39 PM, Alli  wrote:

>
> I wrote a frontend so e.g. localhost:8080/picture/blah.jpg
> encapsulates /tmp/blah.jpg and will return an InMemoryResponse() with
> blah.jpg as content.
>
> I have something like the following:
> LiftRules.dispatch.append {
>  case r @ Req("picture" :: fileName :: Nil, "", GetRequest) => () =>
> ...
> }
>
> Thing is my partial function is not being called when I do /picture/
> blah.jpg but only gets called on /picture/blah
>
> It looks like 'fileName' is not allowed to have a 'dot' in it.
>
> Is it possible that this is a bug?


It's by design.  The suffix is removed and a separate parameter.  Try this:

LiftRules.dispatch.append {
 case r @ Req("picture" :: fileName :: Nil, "jpg", GetRequest) => () =>
...
}


>
>
> I'm not familiar enough with the Lift code base to dive into the rules
> engine.
>
> Cheers,
> Alfred
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala
http://www.amazon.com/Beginning-Scala-David-Pollak/dp/1430219890/ref=sr_1_1?ie=UTF8&s=books&qid=1233018535&sr=8-1
Follow me: http://twitter.com/dpp
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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-27 Thread Tim Perrett

Change the req to this:

Req("picture" :: fileName :: Nil, "jpg", GetRequest)

That should then work for you

Cheers, Tim

On Jan 27, 11:39 pm, Alli  wrote:
> LiftRules.dispatch.append {
>   case r @ Req("picture" :: fileName :: Nil, "", GetRequest) => () =>
>      ...
>
> }

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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-27 Thread Alli

Thanks chaps, can't believe i didn't spot it :).

Cheers,
Alfred

On Jan 27, 11:48 pm, Tim Perrett  wrote:
> Change the req to this:
>
> Req("picture" :: fileName :: Nil, "jpg", GetRequest)
>
> That should then work for you
>
> Cheers, Tim
>
> On Jan 27, 11:39 pm, Alli  wrote:
>
> > LiftRules.dispatch.append {
> >   case r @ Req("picture" :: fileName :: Nil, "", GetRequest) => () =>
> >      ...
>
> > }
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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-27 Thread Alli

Is it possible to make the extension a wild card somehow, e.g.
if i want jpg,png,gif,bmp ?

On Jan 27, 11:50 pm, Alli  wrote:
> Thanks chaps, can't believe i didn't spot it :).
>
> Cheers,
> Alfred
>
> On Jan 27, 11:48 pm, Tim Perrett  wrote:
>
> > Change the req to this:
>
> > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
>
> > That should then work for you
>
> > Cheers, Tim
>
> > On Jan 27, 11:39 pm, Alli  wrote:
>
> > > LiftRules.dispatch.append {
> > >   case r @ Req("picture" :: fileName :: Nil, "", GetRequest) => () =>
> > >      ...
>
> > > }
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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-27 Thread David Pollak
On Tue, Jan 27, 2009 at 3:53 PM, Alli  wrote:

>
> Is it possible to make the extension a wild card somehow, e.g.
> if i want jpg,png,gif,bmp ?



LiftRules.dispatch.append {
 case r @ Req("picture" :: fileName :: Nil, extension, GetRequest) if
List("jpg", "png", "gif").contains(extension) => () =>
...
}

Note that this is not a speed-optimal solution (you'd pre-populate set with
the valid extensions).  But it demonstrates using extractors and guards...
the stuff I'm writing about this very day in *Beginning Scala*.

Thanks,
David


>
> On Jan 27, 11:50 pm, Alli  wrote:
> > Thanks chaps, can't believe i didn't spot it :).
> >
> > Cheers,
> > Alfred
> >
> > On Jan 27, 11:48 pm, Tim Perrett  wrote:
> >
> > > Change the req to this:
> >
> > > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
> >
> > > That should then work for you
> >
> > > Cheers, Tim
> >
> > > On Jan 27, 11:39 pm, Alli  wrote:
> >
> > > > LiftRules.dispatch.append {
> > > >   case r @ Req("picture" :: fileName :: Nil, "", GetRequest) => () =>
> > > >  ...
> >
> > > > }
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala
http://www.amazon.com/Beginning-Scala-David-Pollak/dp/1430219890/ref=sr_1_1?ie=UTF8&s=books&qid=1233018535&sr=8-1
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Re: Potential LiftRules dispatch issue.

2009-01-27 Thread Alli

Thanks, will definitely order a PDF or your book when it's out.

Cheers,
Alli

On Jan 27, 11:56 pm, David Pollak 
wrote:
> On Tue, Jan 27, 2009 at 3:53 PM, Alli  wrote:
>
> > Is it possible to make the extension a wild card somehow, e.g.
> > if i want jpg,png,gif,bmp ?
>
> LiftRules.dispatch.append {
>  case r @ Req("picture" :: fileName :: Nil, extension, GetRequest) if
> List("jpg", "png", "gif").contains(extension) => () =>
>     ...
>
> }
>
> Note that this is not a speed-optimal solution (you'd pre-populate set with
> the valid extensions).  But it demonstrates using extractors and guards...
> the stuff I'm writing about this very day in *Beginning Scala*.
>
> Thanks,
> David
>
>
>
>
>
> > On Jan 27, 11:50 pm, Alli  wrote:
> > > Thanks chaps, can't believe i didn't spot it :).
>
> > > Cheers,
> > > Alfred
>
> > > On Jan 27, 11:48 pm, Tim Perrett  wrote:
>
> > > > Change the req to this:
>
> > > > Req("picture" :: fileName :: Nil, "jpg", GetRequest)
>
> > > > That should then work for you
>
> > > > Cheers, Tim
>
> > > > On Jan 27, 11:39 pm, Alli  wrote:
>
> > > > > LiftRules.dispatch.append {
> > > > >   case r @ Req("picture" :: fileName :: Nil, "", GetRequest) => () =>
> > > > >      ...
>
> > > > > }
>
> --
> Lift, the simply functional web frameworkhttp://liftweb.net
> Beginning 
> Scalahttp://www.amazon.com/Beginning-Scala-David-Pollak/dp/1430219890/ref=...
> Follow me:http://twitter.com/dpp
> Git some:http://github.com/dpp
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