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Charles Lee

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Top Stories by Charles Lee

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)

Java Feature — The Holy Grail of Database Independence

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)

Bridging the Gap Between Open Source and Commercial Applications

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)