[Lift] Re: Potential LiftRules dispatch issue.
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 allilis...@gmail.com wrote:
Thanks, will definitely order a PDF or your book when it's out.
Cheers,
Alli
On Jan 27, 11:56 pm, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Tue, Jan 27, 2009 at 3:53 PM, Alli allilis...@gmail.com 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 allilis...@gmail.com wrote:
Thanks chaps, can't believe i didn't spot it :).
Cheers,
Alfred
On Jan 27, 11:48 pm, Tim Perrett he...@timperrett.com 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 allilis...@gmail.com wrote:
LiftRules.dispatch.append {
case r @ Req(picture :: fileName :: Nil, , GetRequest) =
() = ...
}
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[Lift] Re: Potential LiftRules dispatch issue.
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.
wallaby.po...@googlemail.comwrote:
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 allilis...@gmail.com wrote:
Thanks, will definitely order a PDF or your book when it's out.
Cheers,
Alli
On Jan 27, 11:56 pm, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Tue, Jan 27, 2009 at 3:53 PM, Alli allilis...@gmail.com 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 allilis...@gmail.com wrote:
Thanks chaps, can't believe i didn't spot it :).
Cheers,
Alfred
On Jan 27, 11:48 pm, Tim Perrett he...@timperrett.com 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 allilis...@gmail.com 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.
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 feeder.of.the.be...@gmail.com
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. wallaby.po...@googlemail.com
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 allilis...@gmail.com wrote:
Thanks, will definitely order a PDF or your book when it's out.
Cheers,
Alli
On Jan 27, 11:56 pm, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Tue, Jan 27, 2009 at 3:53 PM, Alli allilis...@gmail.com
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 allilis...@gmail.com wrote:
Thanks chaps, can't believe i didn't spot it :).
Cheers,
Alfred
On Jan 27, 11:48 pm, Tim Perrett he...@timperrett.com
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 allilis...@gmail.com 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: StatefulComet
Ditto.
Chas.
Meredith Gregory wrote:
David,
i would definitely benefit from an example like the tic-tac-toe.
Best wishes,
--greg
On Wed, Jan 28, 2009 at 9:27 AM, David Pollak
feeder.of.the.be...@gmail.com mailto:feeder.of.the.be...@gmail.com
wrote:
Folks,
Thanks to some excellent prodding from Greg Meredith, I've added
StatefulComet which is a subclass of CometActor that supports games
and other Comet applications.
What do you have to implement:
trait StatefulComet extends CometActor {
type Delta : DeltaTrait
type State : CometState[Delta, State]
Define the types. Delta is a difference between two State
objects. Deltas know how to turn themselves into the JavaScript
commands that update display state. State is an immutable data
structure that contains the current state to be displayed.
/**
* Test the parameter to see if it's an updated state object
*/
def testState(in: Any): Box[State]
/**
* Return the empty state object
*/
def emptyState: State
}
You also have to implement a CometState object that holds the
current state:
trait CometState[DeltaType : DeltaTrait, MyType :
CometState[DeltaType, MyType]] {
self: MyType =
def -(other: MyType): Seq[DeltaType]
def render: NodeSeq
}
CometState knows how to diff itself and render itself.
You can implement a very powerful game or other multi-user system on
top of this paradigm. I hope to get some example code built around
a tic-tac-toe game later today or tomorrow.
Thanks,
David
--
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
--
L.G. Meredith
Managing Partner
Biosimilarity LLC
806 55th St NE
Seattle, WA 98105
+1 206.650.3740
http://biosimilarity.blogspot.com
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