You can short cut the second call if the first method return a boolean. ( false I believe )...
Martin Joel Halbert-2 wrote: > > Hi, > > I've been thinking about how onActivate methods are called... > > If i have a page with two onActivate methods: > > > MyPage.onActivate(int modelId1, int modelId2); > MyPage.onActivate(int modelId1, int modelId2, int modelId3); > > and if i have a link to this page which supplies the full 3 argument > context, (e.g. http://bla.com/MyPage/1/2/3) then T5 will invoke the > second method and then the first. > > What is the rational behind thiinvoking both onActivate methods for the > same context? > > If onActivate methods are an opportunity to intialise models (in this > case by looking up the model based on the supplied id) then having both > methods invoked requires us to be defensive about initialisation, if we > want to avoid unecessary model intialisation and data access: > > e.g. i need to write something like this in the first of the above two > methods: > > onActivate(int modelId1, int modelId2){ > if (model1 != null) { > model1 = model1Dao.getById(model1Id); > } > > if (model2 != null) { > model2 = model2Dao.getById(model1Id); > } > } > > (I'm not presuming to have model caching, which i do, but this is > incidental to the problem illustrated) > > I'd be interested to hear how others handle this, and what the merit of > having all available onActivate methods > invoked is when the full context is supplied. > > Rgs, > > Joel > > -- > SU3 Analytics Ltd > The Print House > 18 Ashwin Street > E8 3DL > London > > Tel: +44 (0) 20 3051 8637 > Fax: +44 (0) 20 8196 2215 > Mob: +44 (0) 79 7431 0685 > www.su3analytics.com > > SU3 Analytics Ltd is a company registered in England and Wales under > company number 06639473 at registered address 61b Oxford Gardens, London > W10 5UJ, United Kingdom. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/Rationale-behind-all-possible-onActivate-methods-invoked-when-context-is-supplied-tp20397445p20397591.html Sent from the Tapestry - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
