In late 2002, Javier Soltero, Doug MacEachern, Ryan Morgan, Jon Travis, and I
(the eventual co-founders of Hyperic) began designing and architecting an
application management system that was to become Hyperic HQ. We wanted it to
be the management system that bridged the gap between open source and
commercial applications and, furthermore, we wanted it to use, be built on,
and deployed to the applications and operating systems that we managed.
To achieve that goal, we set out to implement on standards using a
cross-platform language. Thus the decision to use Java was pretty clear, as
the abstraction of the system-specific runtime freed us from having to figure
out native APIs and implement different paths to achieve the desired
functionality. We chose JBoss (then mildly p... (more)
The hope of using any persistence framework is absolute database
independence. Database independence means that you can focus on your job as
an application developer and not a DBA. However, no framework can fully make
this claim. There's much more to running an application on a database than
simply issuing compatible SQL queries and getting back the query results as
expected. In my last ... (more)
Migrating EJB 2.0 entity beans to Hibernate POJOs is pretty straightforward.
Like many applications, all of the data for HQ is stored in the database, and
we need to map from the underlying data store to an object-oriented view. In
EJB 2.0, you would model that data with entity beans. An entity bean is
created and found through the Home interface, and its fields are modified
through its ... (more)