On 2010-06-20 14:55, Douglas Garstang wrote:
> I think I have a misunderstanding of variable scope in classes.
>
> Wy isn't tfel4_ClusterDbType set in the elements::tfel4::elements
> class? It's set in elements::tfel4::defaults but then goes *poof* when
> elements::tfel4::elements tries to access it.
>
> class elements::tfel4::defaults {
> if ( !$tfel4_ClusterDbType ) {
> $tfel4_ClusterDbType = "oracle"
> }
> notice("(1)tfel4_ClusterDbType = ${tfel4_ClusterDbType}")
> }
>
> class elements::tfel4::elements {
> include elements::tfel4::jboss
> include elements::tfel4::defaults
> notice("(2)tfel4_ClusterDbType = ${tfel4_ClusterDbType}")
> }
>
Each class is able to access the scopes of its parents but not of its
siblings. so, in the case of the elements::tfel4::defaults class, it
will see variables from elements::tfel4 , elements, :: (global scope),
in that order of precendence -- e.g. the global variables being accessed
only if the variables are not "redefined" or modified in the parents.
so, for your case, the tfel4_ClusterDbType variable could be defined in
elements::tfel4
--
Gabriel Filion
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