October 2003
Beginner
734 pages
16h 56m
English
Content preview from Head First EJB
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
No more vendor lock-in!
Enterprise beans are portable—not just to different JVM’s, but to different EJB servers.
One of the reasons we all love Java is its portability across multiple platforms. The whole write-once-run-anywhere (WORA) thing.
EJB takes portability to a new level, instead of write-once-run-anywhere, it’s write-once-deploy-anywhere (WODA). Just as WORA frees you from being forced to work on a single OS, WODA frees you from being at the mercy of your application server vendor. And then of course there’s YODA, but we digress.
In the old days, each application server vendor had its own proprietary API. You learn it, work with it, and finally get your enterprise apps up and running. And then guess what? You need a new feature. And then guess what? Your vendor says, “We’re considering that for Q3... of next year”. Now what? Like a drug dealer, they’ve hooked you, and now it’s just too painful to consider giving them up. Give them up for what? Another vendor and another proprietary API and more lock-in.
One of the crucial benefits of EJB is WODA. And now the vendors have to compete not just to sell you in the first place, but to keep you. Because as everybody knows, you can just pack up your beans and go elsewhere.
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.