Cloud computing provides more than scaling. It provides elasticity. That
means it can expand needed enterprise software resources and contract those
resources that are not needed and It can do all this on demand. On the
surface, this looks like a great opportunity for new cloud services
businesses to emerge. These providers would basically sell capacity to other
businesses that would otherwise have to maintain enough IT to accommodate
infrequent but significant spikes in usage traffic. These cloud computing
vendors would be providing what is called an external cloud.
One use case that is often used to explain cloud computing is a greeting card
company that conducts business over the internet. During most of the year,
sales are relatively constant with most business coming from birthdays and
anniversaries. However, on some holidays, sales will spike and computing
The question that is often posed in one rhetorical flourish or another is
this: Which is better (faster, more efficient, blah blah blah...) Java or
C++? The question that is really not being asked is: for what? Selecting a
programming language is not like selecting a dinner suit; you are not going
to be asking the question that frequently. In fact, this question is more
like deciding on a business plan rather than simply selecting a tool from the
The reality is that the only people that would really ask this question are
Are just at the beginning of planni... (more)
OpenJPA is the open source implementation of the Java Persistence API (JPA).
OK, so what's that? THAT is a way to persist information in Java by way of
using a back-end database and not having to write a bunch of messy JDBC code.
Why is this needed? Well maybe it's not. But unless you are writing
calculator software, some output, settings or something has to be saved off.
There are plenty of schemes for saving data from writing flat text files, to
elegant multi-megabyte XML streams to JDBC connected databases. But JPA is
not just another scheme. For Java, it is really THE way to ... (more)
Java Developer Magazine on Ulitzer
IBM WebSphere started its Open Beta (Managed Betas are so 'last-year') for
the WebSphere Application Server Feature Pack for OSGi Applications and JPA
2.0 today. The Open Beta site is here. I'll list some of the highlights from
the Beta site as a teaser.
Highlights of the OSGi applications support delivered in the feature pack
(from the Beta Site ):
OSGi 4.2 Blueprint component model for declarative assembly, and simplified
unit test Extensions to the Blueprint component model for declarative
transactions, container-managed JPA and resource ref... (more)