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Posted to user@velocity.apache.org by Robert Koberg <ro...@koberg.com> on 2005/08/23 19:01:06 UTC
set a value in a macro
Hi,
Say I have a VM_global_library.vm that has a macro like:
#macro (roleList)
#set ($roles = ["foo", "bar"])
#end
Should I be able to do the following in a template:
#roleList
#foreach ($role in $roles)
...
#end
OR, how would you globally set a variable that is only needed in a few
different templates? In other words, I was hoping to instantiate the
$roles variable only when needed?
Any ideas?
best,
-Rob
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Re: set a value in a macro
Posted by Barbara Baughman <ba...@utdallas.edu>.
I personally set all of my global variables whenever I touch Velocity,
and I have at least 100 of them, some defined with some pretty
complicated routines. It doesn't seem to impact response times on the
web application, and it saves a lot of programming and debugging time
to just know they are always there.
I'm very impressed with Velocity's speed. I'm willing to trade minor
inefficiency for speed in coding.
Barbara Baughman
X2157
On Tue, 23 Aug 2005, Robert Koberg wrote:
> Hi,
>
> Say I have a VM_global_library.vm that has a macro like:
>
> #macro (roleList)
>
> #set ($roles = ["foo", "bar"])
>
> #end
>
> Should I be able to do the following in a template:
>
> #roleList
> #foreach ($role in $roles)
> ...
> #end
>
>
> OR, how would you globally set a variable that is only needed in a few
> different templates? In other words, I was hoping to instantiate the
> $roles variable only when needed?
>
> Any ideas?
>
> best,
> -Rob
>
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>
>
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Re: set a value in a macro
Posted by Nathan Bubna <nb...@gmail.com>.
On 8/25/05, Robert Koberg <ro...@koberg.com> wrote:
> Nathan Bubna wrote:
>
> > hmm. both your way and Jason's?
>
> No, I did not try to #parse. Just tried to set the variable value in a
> macro. haven't needed to #parse anything yet - I guess I could look
> into it.
>
>
> > also, what were your velocimacro
> > settings in your velocity.properties? (just curious, i'm not sure if
> > they'll make a difference)
> >
>
> Here is my velocity.properties:
>
> input.encoding = UTF-8
> output.encoding = UTF-8
>
> webapp.resource.loader.cache = false
> velocimacro.library.autoreload = true
>
> velocimacro.library = /WEB-INF/VM_global_library.vm
yeah, if it were going to work, it should have done so with those.
the only other thing you might try (besides Jason's #parse method, of
course) would be to do a #set( $roles = 'foo' ) before the #roleList()
macro call. that might make the $roles variable stick.
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Re: set a value in a macro
Posted by Robert Koberg <ro...@koberg.com>.
Nathan Bubna wrote:
> hmm. both your way and Jason's?
No, I did not try to #parse. Just tried to set the variable value in a
macro. haven't needed to #parse anything yet - I guess I could look
into it.
> also, what were your velocimacro
> settings in your velocity.properties? (just curious, i'm not sure if
> they'll make a difference)
>
Here is my velocity.properties:
input.encoding = UTF-8
output.encoding = UTF-8
webapp.resource.loader.cache = false
velocimacro.library.autoreload = true
velocimacro.library = /WEB-INF/VM_global_library.vm
thanks,
-Rob
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Re: set a value in a macro
Posted by Nathan Bubna <nb...@gmail.com>.
On 8/25/05, Robert Koberg <ro...@koberg.com> wrote:
> Nathan Bubna wrote:
>
> >>>
> >>>>OR, how would you globally set a variable that is only needed in a few
> >>>>different templates? In other words, I was hoping to instantiate the
> >>>>$roles variable only when needed?
> >>>>
> >>>>Any ideas?
> >>>
> >>>
> >>>if you use the VelocityViewServlet (part of VelocityTools), you could
> >>>set some data (no arrays/lists yet, sorry) in the toolbox.xml as
> >>><data> elements. or you could use a servlet filter to put the values
> >>>in the servletContext attributes upon first request. then they'll be
> >>>automatically available to all templates and subsequent requests.
> >>
> >>Hi,
> >>thanks, but I was looking for a way to keep it available, but not put it
> >>into memory unless I needed it.
> >>
> >>It is not a bug deal (the array contains 11 items...), just checking.
> >
> >
> > ah. i didn't pick up on that. so, having once again skimmed thru
> > your first email, i'm curious... did you try the velocimacro approach
> > you described? i think it ought to work. Jason's method should too.
>
> I did try it and it did not work.
hmm. both your way and Jason's? also, what were your velocimacro
settings in your velocity.properties? (just curious, i'm not sure if
they'll make a difference)
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Re: set a value in a macro
Posted by Robert Koberg <ro...@koberg.com>.
Nathan Bubna wrote:
>>>
>>>>OR, how would you globally set a variable that is only needed in a few
>>>>different templates? In other words, I was hoping to instantiate the
>>>>$roles variable only when needed?
>>>>
>>>>Any ideas?
>>>
>>>
>>>if you use the VelocityViewServlet (part of VelocityTools), you could
>>>set some data (no arrays/lists yet, sorry) in the toolbox.xml as
>>><data> elements. or you could use a servlet filter to put the values
>>>in the servletContext attributes upon first request. then they'll be
>>>automatically available to all templates and subsequent requests.
>>
>>Hi,
>>thanks, but I was looking for a way to keep it available, but not put it
>>into memory unless I needed it.
>>
>>It is not a bug deal (the array contains 11 items...), just checking.
>
>
> ah. i didn't pick up on that. so, having once again skimmed thru
> your first email, i'm curious... did you try the velocimacro approach
> you described? i think it ought to work. Jason's method should too.
I did try it and it did not work.
best,
-Rob
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Re: set a value in a macro
Posted by Nathan Bubna <nb...@gmail.com>.
On 8/24/05, Robert Koberg <ro...@koberg.com> wrote:
> Nathan Bubna wrote:
> > On 8/23/05, Robert Koberg <ro...@koberg.com> wrote:
> > #snip
> >
> >>OR, how would you globally set a variable that is only needed in a few
> >>different templates? In other words, I was hoping to instantiate the
> >>$roles variable only when needed?
> >>
> >>Any ideas?
> >
> >
> > if you use the VelocityViewServlet (part of VelocityTools), you could
> > set some data (no arrays/lists yet, sorry) in the toolbox.xml as
> > <data> elements. or you could use a servlet filter to put the values
> > in the servletContext attributes upon first request. then they'll be
> > automatically available to all templates and subsequent requests.
>
> Hi,
> thanks, but I was looking for a way to keep it available, but not put it
> into memory unless I needed it.
>
> It is not a bug deal (the array contains 11 items...), just checking.
ah. i didn't pick up on that. so, having once again skimmed thru
your first email, i'm curious... did you try the velocimacro approach
you described? i think it ought to work. Jason's method should too.
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Re: set a value in a macro
Posted by Robert Koberg <ro...@koberg.com>.
Nathan Bubna wrote:
> On 8/23/05, Robert Koberg <ro...@koberg.com> wrote:
> #snip
>
>>OR, how would you globally set a variable that is only needed in a few
>>different templates? In other words, I was hoping to instantiate the
>>$roles variable only when needed?
>>
>>Any ideas?
>
>
> if you use the VelocityViewServlet (part of VelocityTools), you could
> set some data (no arrays/lists yet, sorry) in the toolbox.xml as
> <data> elements. or you could use a servlet filter to put the values
> in the servletContext attributes upon first request. then they'll be
> automatically available to all templates and subsequent requests.
Hi,
thanks, but I was looking for a way to keep it available, but not put it
into memory unless I needed it.
It is not a bug deal (the array contains 11 items...), just checking.
best,
-Rob
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Re: set a value in a macro
Posted by Nathan Bubna <nb...@gmail.com>.
On 8/23/05, Robert Koberg <ro...@koberg.com> wrote:
#snip
> OR, how would you globally set a variable that is only needed in a few
> different templates? In other words, I was hoping to instantiate the
> $roles variable only when needed?
>
> Any ideas?
if you use the VelocityViewServlet (part of VelocityTools), you could
set some data (no arrays/lists yet, sorry) in the toolbox.xml as
<data> elements. or you could use a servlet filter to put the values
in the servletContext attributes upon first request. then they'll be
automatically available to all templates and subsequent requests.
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Re: set a value in a macro
Posted by Jason Pettiss <ja...@TheCatalis.com>.
I'm not sure about the performance impact of this, but I just create a
template which has my common variables for a particular area of my app
and #parse it from wherever I need it.
--jason
Robert Koberg wrote:
> Hi,
>
> Say I have a VM_global_library.vm that has a macro like:
>
> #macro (roleList)
>
> #set ($roles = ["foo", "bar"])
>
> #end
>
> Should I be able to do the following in a template:
>
> #roleList
> #foreach ($role in $roles)
> ...
> #end
>
>
> OR, how would you globally set a variable that is only needed in a few
> different templates? In other words, I was hoping to instantiate the
> $roles variable only when needed?
>
> Any ideas?
>
> best,
> -Rob
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: velocity-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: velocity-user-help@jakarta.apache.org
>
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