Leo Simons wrote:
Hi Adam,The above approach only works if the CompanyID value is a static (i.e. declared i a configuration, or context directive or whatever). If you have a runtime value, you have to (a) create you own DefaultContext and handle a compoent deployment, (b) use a component lifecycle extension, or (c) roll-your-own container.
On Fri, 2002-11-15 at 19:39, Adam Rossi wrote:
Stephen, I found your summary descriptions helpful. On thing I amnah....it's something you need to do often and it can be easily done
struggling with is how to set a parameter in a component that is needed
during Initialiable. For example, if my Company component needs a
companyID set before it can initialize, how does the container set the
ID before initialize is called? It seems that a name/value pair should
be set in the context so that Contextualizable can supply the companyId
before it is initialized. I have tried to find an example of this but
could not find one. Is this beyond the lifecycle of the container and
something that should be done via a set method after I have my object?
using the avalon lifecycle.
we've got Parameterizable and Parameters for passing in property-like
stuff, but the use of that in current container is not quite as easy as
using Configuration and Configurable.
What you do is provide a xml configuration file, and then that
configuration is handed in as an object hierarchy (think DOM, but way
easier to use) to the component by the container (it calls the
configure() method on your component). This is guaranteed to happen
before initialize() is called.
(While it is of course possible to put stuff like this in a Context,
using a Configuration is usually easier and more straightforward for
data that is naturally represented in XML)
How to do this exactly differs a little per container. If you are using
phoenix, your best bet is to take a look at how the demo apps do it
(somewhat out-of-date downloads from
http://cvs.apache.org/~hammant/apps/, for the most recent stuff you'll
have to get this from the jakarta-avalon-apps CVS) for clues.
I'm CCing the avalon-user list as that's really the best place for talk
about this. no worries though ;)
Cheer, Steve.
see - I can write short messages ;-)
regards,
- Leo Simons
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