Best practice for onActivate and onPassivate without persistence

[Peter Stavrinides <P....@albourne.com>]

Hi everyone,

I was wandering about best practice for passing multiple parameters to a page without using persist in the mix. Take the following example:

void onActivate(Integer companyId, Integer siteId) throws SQLException {
    _site = getSite(companyId,siteId);
}

CompanySite onPassivate(){
	return _site;
}	

This works okay for my purposes... I like it because its stateless, however is CompanySite being serialized underneath? how expensive could that potentially be (we use some extreme objects)...  If so then an uglier way could be better? perhaps:

String onPassivate(){
   return _site.getCId() + "/" + _site.getSiteId();
}	


thanks for your help,
Peter

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Re: Best practice for onActivate and onPassivate without persistence

["Thiago H. de Paula Figueiredo" <th...@gmail.com>]

Em Tue, 04 Nov 2008 09:31:36 -0300, Peter Stavrinides  
<P....@albourne.com> escreveu:

> Hi everyone,

Hi!

> I was wandering about best practice for passing multiple parameters to a  
> page without using persist in the mix. Take the following example:
>
> void onActivate(Integer companyId, Integer siteId) throws SQLException {
>     _site = getSite(companyId,siteId);
> }
>
> CompanySite onPassivate(){
> 	return _site;
> }	
>
> This works okay for my purposes... I like it because its stateless,  
> however is CompanySite being serialized underneath?

AFAIK, no.

> String onPassivate(){
>    return _site.getCId() + "/" + _site.getSiteId();
> }	

It wouldn't work. Tapestry would handle it as a single String and scape  
the / character. Then, your onActivate method, as written above, wouldn't  
work. You should return an Object[] or List instead:

Object onPassivate(){
     return new Object[] {_site.getCId(), + _site.getSiteId()};
}	

-- 
Thiago H. de Paula Figueiredo
Independent Java consultant, developer, and instructor
http://www.arsmachina.com.br/thiago

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