Further to my last post, this works correctly in v1.5 of velocity - I get the expected response of "new value dave"
Cheers, Steve -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve O'Hara Sent: 08 December 2008 16:37 To: Velocity Users List Subject: RE: Caching Problem with Macros Hi All, We have upgraded to 1.6 but still have this issue. I've condensed it down to the following; #set($steve="old value") #macro(tmpMacro $steve) #set($steve="new value $steve") $steve #end #tmpMacro("dave") As you can see, there is some messing with the scope going on here but this is in essence what is occurring in our application on a much larger scale. I would expect the result to be "new value dave" but it's not, bizarrely it's "dave" Are we running foul of some golden rules here concerning scope and variable names? Steve Nathan: I didn't re-open the JIRA issue just in case this is down to our own stupidity -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] .org] On Behalf Of Steve O'Hara Sent: 18 September 2008 11:59 To: Velocity Users List Subject: Caching Problem with Macros Hi All, I'm re-raising this issue because it has just bitten us in the backside again. Here's the scenario; we have a framework that allows us to reload the Velocity runtime so that we can tinker with caching etc at runtime. We normally run development with template caching turned off and deliver to the client with caching turned on. There is a problem with inline macros (probably macro libraries too, not sure) whereby they will behave differently once they are compiled and cached then when they are interpreted at runtime. It is all to do with the re-assignment of parameter variables within the macro. Here is a very simple example; #macro(tmpMacro $FieldNames) #set($FieldNames="ingredient." + $FieldNames.replaceAll(",",",ingredient.")) ..... #end #tmpMacro("one,two,three") This works fine when the template is not cached - as soon as you turn on caching, the macro becomes unreliable. My original prognosis was that we were upsetting the variable types by converting strings into lists but as you can see, that isn't the case in this example. The problem is solved by changing the assignment to; #set($Names="ingredient." + $FieldNames.replaceAll(",",",ingredient.")) I can appreciate that maybe this type of "re-assignment" of parameters might be an issue, but the real problem is the inconsistency between the cached and non-cached behaviours. I'll raise this as a bug. Regards, Steve -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] .org] On Behalf Of Steve O'Hara Sent: 26 June 2008 18:58 To: Velocity Users List Subject: RE: Strange Caching Problem with Macros - RESOLVED Hi Nathan, By cutting down the example to it's bare bones, I've discovered the problem. The following statement causes some sort of error within Velocity (not announced in the logger) that only occurs when the template is cached. #set($FieldNames="one,two,three") ....... #set($FieldNames=$utils.splitToList($FieldNames,",")) I think that maybe we're playing fast and loose with velocity and it's type management, because what we're doing here is assigning a List to the same variable that formerly contained a String. When this is run without caching it works fine but once caching is on, it fails. By changing the statement to this, it works fine. #set($FieldNamesList=$utils.splitToList($FieldNames,",")) Perhaps not really a bug, more of a nudge for us to remember that velocity is not type-less? Thanks, Steve -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] .org] On Behalf Of Nathan Bubna Sent: 24 June 2008 03:32 To: Velocity Users List Subject: Re: Strange Caching Problem with Macros can you replicate this with a simpler example at all? it's a bit hard to spot the tree in the forest. :) it's not obvious to me what the problem is, and i can't run your example, so it's rather hard to track down. could you also let us know what version of Velocity this is and perhaps what your velocity.properties are when you experience this? On Sun, Jun 22, 2008 at 4:55 AM, Steve O'Hara <[EMAIL PROTECTED]> wrote: > > I'm getting a problem when caching is turned on whereby a method call is > not being run consistently. > > I have a macro as per below; > > #macro(macroShowGrid $FieldNames $SortFieldName) > > #set($Rows=$Entity.getConstituentGrid($FieldNames,$SortFieldName)) > #if ($PreviousBrand) > #set($OldRows=$PreviousBrand.getConstituentGrid($FieldNames,$SortFieldNa > me)) #end > #set($FieldNames=$utils.splitToList($FieldNames,",")) > > #foreach($Row in $Rows) > <tr> > #foreach($Field in $FieldNames) > #if ($velocityCount==1) #macroWriteImage($Row $Field > "") #end > <td > style="background-color:white;vertical-align:top;"> > #if ($velocityCount==1) > #set($Number=$Row.get($Field)) > #if($Number.matches("[0-9]+")) > > #set($Url="$AppPath/$PageType/explorer?datasrc=$DataSource&new&view=bran > d&key=$Number") > #else > > #set($Url="$AppPath/$PageType/explorer?datasrc=$DataSource&new&view=inde > x&minutenumber=$Number") > #end > <a href="$Url" target="_blank" > #macroMouseOver("View this record")>$Row.get($Field)</a> > #else > $Row.get($Field) > #end > </td> > #end > </tr> > #end > #end > > This macro is called from with another macro; > > #macro(macroShowProductIngredients $FieldName $FieldTitle > $FieldComment $FieldList $FieldOrder) > #if ($Entity.getValue($FieldName).length()>0 || > $Entity.getValue($FieldComment).length()>0) > <table border="1" bordercolor="#CDCB99" cellspacing="0" > cellpadding="3" bgcolor="#E2E0C8" > style="margin-top:8px;margin-left:4px"> > <tr> > <td colspan="5">$FieldTitle</td> > </tr> > <tr> > #set($Fields=$utils.splitToList($FieldList,",")) > <td nowrap width="100" colspan="2"align="center">Minute > Number</td> > <td nowrap width="100%">Description</td> > <td nowrap align="center">Level (%)</td> > <td nowrap width="150" align="left">Supplier</td> > </tr> > #macroShowGrid($FieldList $FieldOrder) > #set($PreviousFieldValue="") > #set($FieldValue="") > #if ($PreviousBrand) > #set($PreviousFieldValue=$PreviousBrand.getValue($FieldComment)) #end > #set ($FieldValue=$Entity.getValue($FieldComment)) > #if ($FieldValue.length()>0 || $PreviousFieldValue.length>0 > || $PreviousBrand) > <tr> > <td bgcolor="#FFFFFF" valign="top" colspan="5"> > #macroShowValue($FieldValue $PreviousFieldValue) > </td> > </tr> > #end > </table> > #end > #end > > > > All works fine when caching is turned off but when I turn it on, the > method call $Entity.getConstituentGrid($FieldNames,$SortFieldName) is > not being run. The value of $Rows is always undefined. I say always, I > don't mean always, it seems to be a bit intermittent. > These macros are inline and I'm using a custom file based resource > loader. > > My understanding of caching was that it cached the structure of the > template in an AST, not the contents? > I've checked that the $Entity object is valid, which it is and that it > has a different Class ID each call, which it does which would indicate > the Context is definitely getting given a different Entity each call. > The parameters are correct for the call too. > > Thanks, > Steve > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
