Tuesday May 28, 2013

Virtual Developer Day: Java ME, SE, and EE

It's an exciting time in the Java Jungle! There are a lot of things going on "in Java" right now, and as a result, there are several free webinars scheduled to provide introductions to technologies and concepts you might want to know a bit more about. Just recently, I mentioned the upcoming Introducing Java EE 7 webcast, and now there's another one you'll probably be very interested to attend. The best part(s)? You can attend from your home or workplace and it's completely free! The worst part? You may struggle to decide which track to take - they're all that good.

For this four-hour Virtual Developer Day, here are the tracks and their topics:

Separate dates/times are offered for western and eastern hemispheres; please click this link to learn more and register.

Keep the Java flowing,
Mark

Wednesday May 22, 2013

Java EE 7: Get Ready!

With the recent approval of the Java EE 7 platform JSR, Java EE 7 is on its way!

There will be two webinars to introduce new features and give you an idea of what all the buzz is about. You can access this feature-packed event from your own desk, jump in when you can and step away when you need to do so. Registering once gets you access to both days, so you can sign up now and nail down your schedule as the time approaches.

What will you see in this online event ?
  • Business Keynote (Hasan Rizvi and Cameron Purdy)
  • Technical Keynote (Linda DeMichiel)
  • Breakout Sessions on different JSRs by specification leads
  • Live Chat
  • Lots of Demos
  • Community, Partner, and Customer video testimonials

Follow this link to sign up, or click on the images above/below. "See" you there!

All the best,
Mark

Tuesday Oct 09, 2012

Seven Random Thoughts on JavaOne

As most people reading this blog may know, last week was JavaOne. There are a lot of summary/recap articles popping up now, and while I didn't want to just "add to the pile", I did want to share a few observations. Disclaimer: I am an Oracle employee, but most of these observations are either externally verifiable or based upon a collection of opinions from Oracle and non-Oracle attendees alike. Anyway, here are a few take-aways:

  1. The Java ecosystem is alive and well, with a breadth and depth that is impossible to adequately describe in a short post...or a long post, for that matter. If there is any one area within the Java language or JVM that you would like to - or need to - know more about, it's well-represented at J1.
  2. While there are several IDEs that are used to great effect by the developer community, NetBeans is on a roll. I lost count how many sessions mentioned or used NetBeans, but it was by far the dominant IDE in use at J1. As a recent re-convert to NetBeans, I wasn't surprised others liked it so well, only how many.
  3. OpenJDK, OpenJFX, etc. Many developers were understandably concerned with the change of sponsorship/leadership when Java creator and longtime steward Sun Microsystems was acquired by Oracle. The read I got from attendees regarding Oracle's stewardship was almost universally positive, and the push for "openness" is deep and wide within the current Java environs. Few would probably have imagined it to be this good, this soon. Someone observed that "Larry (Ellison) is competitive, and he wants to be the best...so if he wants to have a community, it will be the best community on the planet." Like any company, Oracle is bound to make missteps, but leadership seems to be striking an excellent balance between embracing open efforts and innovating in competitive paid offerings.
  4. JavaFX (2.x) isn't perfect or comprehensive, but a great many people (myself included) see great potential, are developing for it, and are really excited about where it is and where it may be headed. This is another part of the Java ecosystem that has impressive depth for being so new (JavaFX 1.x aside). If you haven't kicked the tires yet, give it a try! You'll be surprised at how capable and versatile it is, and you'll probably catch yourself smiling while coding again.  :-)
  5. JavaEE is everywhere. Not exactly a newsflash, but there is a lot of buzz around EE still/again/anew. Sessions ranged from updated component specs/technologies to Websockets/HTML5, from frameworks to profiles and application servers. Programming "server-side" Java isn't confined to the server (as you no doubt realize), and if you still consider JavaEE a cumbersome beast, you clearly haven't been using the last couple of versions. Download GlassFish or the WebLogic Zip distro (or another JavaEE 6 implementation) and treat yourself.
  6. JavaOne is not inexpensive, but to paraphrase an old saying, "If you think that's expensive, you should try ignorance." :-) I suppose it's possible to attend J1 and learn nothing, but you'd have to really work at it! Attending even a single session is bound to expand your horizons and make you approach your code, your problem domain, differently...even if it's a session about something you already know quite well. The various presenters offer vastly different perspectives and challenge you to re-think your own approach(es).
  7. And finally, if you think the scheduled sessions are great - and make no mistake, most are clearly outstanding - wait until you see what you pick up from what I like to call the "hallway sessions". Between the presentations, people freely mingle in the hallways, go to lunch and dinner together, and talk. And talk. And talk. Ideas flow freely, sparking other ideas and the "crowdsourcing" of knowledge in a way that is hard to imagine outside of a conference of this magnitude. Consider this the "GO" part of a "BOGO" (Buy One, Get One) offer: you buy the ticket to the "structured" part of JavaOne and get the hallway sessions at no additional charge. They're really that good.

If you weren't able to make it to JavaOne this year, you can still watch/listen to the sessions online by visiting the JavaOne course catalog and clicking the media link(s) in the right column - another demonstration of Oracle's commitment to the Java community. But make plans to be there next year to get the full benefit! You'll be glad you did.

 

All the best,
Mark

P.S. - I didn't mention several other exciting developments in areas like the embedded space and the "internet of things" (M2M), robotics, optimization, and the cloud (among others), but I think you get the idea. JavaOne == brainExpansion;  Hope to see you there next year!

Monday Jun 11, 2012

JavaOne 2012 Java Jungle Session!

Well, it's official - the proposal I submitted to JavaOne 2012 was accepted! Pending management approval, I'll be leading the following session:

Session ID: CON3519

Session Title: Building Hybrid Cloud Apps: Local Databases + The Cloud = Extreme Versatility

If you've been struggling with ways to "move to the cloud" without losing the advantages you currently enjoy/require in your current environment, I hope you'll consider signing up for this session.

Hope to see you there!

Mark

Tuesday Jun 05, 2012

Quick Fix for GlassFish/MySQL NoPasswordCredential Found

Just the other day, I stood up a GlassFish 3.1.2 server in preparation for a new web app we've developed. Since we're using MySQL as the back-end database, I configured it for MySQL (driver) and created the requisite JDBC resource and supporting connection pool. Pinging the finished pool returned a success, and all was well.

Until we fired up the app, that is -- in this case, after a weekend. Funny how things seem to break when you leave them alone for a couple of days. :-) Strangely, the error indicated "No PasswordCredential found". Time to re-check that pool.

All the usual properties and values were there (URL, driverClass, serverName, databaseName, portNumber, user, password) and were populated correctly. Yes, the password field, too. And it had pinged successfully. So why the problem?

A bit of searching online produced enough relevant material to offer promise. I didn't take notes as I was investigating the cause (note to self), but here were the general steps I took to resolve the issue:

First, per some guidance I had found, I tried resetting the password value to nothing (using () for a value). Of course, this didn't fix anything; the database account requires a password. And when I tried to put the value back, GlassFish politely refused. Hmm.

I'd seen that some folks created a new pool to replace the "broken" one, and while that did work for them, it seemed to simply side-step the issue. So I deleted the password property - which GlassFish allowed me to do - and restarted the domain. Once I was back in, I re-added the password property and its value, saved it, and pinged...success! But now to the app for the litmus test.

The web app worked, and everything and everyone was now happy. Not bad for a Monday.  :-D

Hope this helps,
Mark
About

The Java Jungle addresses topics from mobile to enterprise Java, tech news to techniques, and anything even remotely related. The goal is to help us all do our work better with Java, however we use it.

Your Java Jungle guide is Mark Heckler, an Oracle Java/Middleware/Core Engineer with development experience in numerous environments. Mark's current work pursuits and passions all revolve around Java and leave little time to blog or tweet - but somehow, he finds time to do both anyway.

Mark lives with his very understanding wife, three kids, and dog in the St. Louis, MO area.



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