Actually Core Java Server Faces uses backing bean when you use binding attribute on tags. The backing bean is then the bean holding the UIComponent reference.
Regards, ~ Simon On 12/17/06, Simon Kitching <[EMAIL PROTECTED]> wrote:
Behrang Saeedzadeh wrote: > Hi, > > What is the difference between a managed-bean and a backing-bean? > > 1) Aren't all backing-beans, managed-beans as well? > 2) In which scenarios a managed-bean is not a backing-bean? > > I browsed through the JSF 1.1 spec and I couldn't find the definition > for either of these terms. Overall I think the spec lacks a glossary > (local value, etc. are not defined formally anywhere in the sepc.) A "managed bean" is something defined in a faces config file using the <managed-bean> tag. AFAIK, the term "backing bean" is not a term used by the JSF spec at all. It's a common web development term (struts, etc) that doesn't entirely map to the JSF concepts. My personal interpretation is that when a page (jsp/facelets/etc) contains EL expressions that mostly or entirely map onto a single managed bean, then that managed bean can be called the "backing bean" for that page. Note, however, that there is no requirement in JSF for a page to access only one managed bean; it can access a dozen if it wishes, in which case the term "backing bean" really can't be applied. And if I were using the Apache Shale View Controller, then I might use the term "backing bean" to talk about the object that receives the view-based callbacks, even if the associated page accesses a range of other managed beans. Cheers, Simon
