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[dtp-connect-dev] Re: [dtp-dev] New Element for Connection Profile Extension Point

These changes have been committed.

dtp-dev-bounces@xxxxxxxxxxx wrote on 05/10/2006 10:09:20 PM:

>
> Hey all,
>
> I've added a new element to the connection profile extension point.  The
> new element, connectionFactoryAdapter, allows developers to add
connection
> factories that are applied as adapters for specific connection factories
> already defined for a connection profile type.  This allows the adapter
to
> be applied to all profile types containing that factory.  The benefit of
> this is that it allows components to be developed without needing to know
> about specific connection profile types.
>
> This new feature has been applied to the SQL model connection factory.
> This factory is now defined as an adapter and will be applied to all
> connection profiles defining a "java.sql.Connection" connection factory.
> This alleviates developers providing custom DB connection profiles from
> having to define a SQL model connection factory of their own.  They now
> must simply provide a java.sql.Connection connection factory.  (In
addition
> to this, their profile must also reference a driver definition which
> specifies a vendor and version that can be used to look up a DB
definition.
> This is not a change from the current requirements for custom DB
profiles.)
>
> This feature could also be used by ODA for creating ODA connection
objects
> for all profiles providing a java.sql.Connection connection factory.
This
> would allow any DB profile to be accessible through the ODA APIs.
>
> The following is a summary of the API changes:
> IConnectionFactoryProvider:  removed getConnectionProfileProvider() from
> the interface definition.
>
> connectionProfile extension point: added connectionFactoryAdapter
element.
>
> The connectionFactoryAdapter element does provide a mechanism for
> overriding the adapter for specific profile types, if necessary.  Also,
if
> a profile has an existing connection factory of the same type as the
> adapter, the connection factory will be used in place of the adapter.
> (Basically, if there are any existing profiles with a SQL model
connection
> factory already specified, that factory will be used instead of the
factory
> adapter defined within ...sqm.core; i.e. this should not break existing
> implementations.)
>
> The specific changes can be located in the patch file attached to the BZ
> request for this feature.
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=137123
>
> Note, this does not address the multiple connection issue (i.e. two
> connections will still be created when connecting to a DB).  After
spending
> much time, I could not find a way to do this without making significant
> changes to the code base.  In the end, I opted for a simpler mechanism
> which fit well within the current APIs (notice there was only a single
> breaking change to the provisional API).  This also allowed existing UI
> contributions and filter logic to be used as-is.
>
> Please let me know if you have any questions, comments, concerns, etc.
>
> I plan to commit these changes Friday.
>
> Thanks,
> Rob
>
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