[sca-j] ISSUE-175: Updated Proposal

[Ramkumar R1 <ramkumar_rj@in.ibm.com>]

Important points to note from Spring Documentation:
(just for information, not for the proposal)

• When using XML-based configuration metadata, you use the 'id' or 'name' attributes to specify the bean identifier(s). The 'id' attribute allows you to specify exactly one id, and as it is a real XML element ID attribute, the XML parser is able to do some extra validation when other elements reference the id; as such, it is the preferred way to specify a bean id.
• Please note that you are not required to supply a name for a bean. If no name is supplied explicitly, the container will generate a unique name for that bean. The motivating use case for not supplying a name for a bean is inner beans.
• In Spring you can have ApplicationContexts form a hierarchy, one contexts is said to be the parent of another one. In case of multiple application context, later bean definitions will override ones defined in earlier loaded files. This can be leveraged to deliberately override certain bean definitions via an extra XML file.

Updated Proposal:

The SCA Spring Component Implementation specification
should state that...

If there are no <sca:service/> elements in the application context, one <service/> element exists for each service implemented by each top-level <bean/> element in the application context whose "id" attribute is available. Every bean that needs to be considered for implicit services within the application context should have "id" attribute associated with it which uniquely identifies the bean, beans with no "id" attribute will be ignored.

In case of multiple application context hierarchy, where one context is said to be the parent of another one, the later bean definition will override ones defined in the earlier loaded files. Applying this rule, implicit services will be created for the later bean definition which will override the ones defined in the earlier loaded files.

Thanks & Regards,

R Ramkumar
Open Source SOA Development - Apache Tuscany
Phone : 91-80-41927623
Email  : ramkumar_rj@in.ibm.com