Welcome!

Weblogic Authors: Yeshim Deniz, Elizabeth White, Michael Meiner, Michael Bushong, Avi Rosenthal

Related Topics: Weblogic

Weblogic: Article

Pattern Matching

Pattern Matching

When I first graduated (well, actually, the second time) I had an offer from a company for a programming job. They were going to hire me, contingent upon my passing the IBM Programmer's Aptitude Test. So one day I drove my college junk heap an hour out of my way to take this test. I had to get an "A" to get the job. I was nervous, but once I got the test, I realized I needn't have worried - it was all about patterns.

It's both a relief and a disappointment in the programming business that nothing is really new. We keep solving the same old problems, sometimes in new ways, or with new tools. That's disappointing, but at the same time it allows us to focus on repeatability. It also lets us focus on the business side of our careers (i.e., the things that pay the bills) by developing a certain amount of productivity. In a sense, as knowledge workers (that's such a nasty term) we're like highly educated assembly-line workers - paid to do the same things over and over again. Our added value (and the justification for our billing rates or salaries) is that unlike an assembly line worker, who is normally given a set pattern, it's our job to identify patterns in business processes or their technical implementations, and take advantage of them for maximum efficiency.

Nowhere in programming are patterns and best practices more important than in the J2EE world. In the beginning, there were no J2EE patterns, and people did all sorts of strange things with their code. It compiled, it even ran, but at the end of the day it performed poorly.

You should, of course be familiar with the idea of patterns. If you're not, put this down, go buy Design Patterns by Gamma et al., and study up, then pick this issue up again.

Patterns are everywhere. The JavaBean and the EJB approach are based on patterns such as the getter/setter method of defining an attribute. Or the use of deployment descriptors.

But these aren't enough to ensure performance, which is why the folks at Sun put together the J2EE Blueprints. These are a group of patterns that help to optimize the performance of a J2EE application. The Fast Lane Reader pattern, for example, helps reduce the overhead of transferring read-only (or read mostly) data to user displays by avoiding the instantiation of entity beans. Because when you send the data across the EJB container to the Web container, you don't send the EJB, you send its data.

Even these patterns need proper care and feeding. It's easy to go overboard and make everything session beans (or even JSP pages), but this doesn't accomplish the goals of a partitioned architecture, nor does it leverage the transaction management and storage mechanisms of the EJB container. There's a balance to pattern usage, and it's very important to consider that balance before acting.

This issue presents some patterns for J2EE use. Properly designed, a J2EE application can scale to virtually any level of client support. Improperly designed, you can choke a user community to death with a system that cannot be saved even by throwing hardware at it. It's up to you to learn what patterns exist, and not just what patterns, but when it's appropriate to use them. Do so and you're on your way to the transition from programmer to architect. And to making things count for your business or client.

I got an "A" on the aptitude test, but I took a different job that paid better and offered more skill development in modern languages and systems. Did they really think I wanted to learn COBOL? Yikes!

More Stories By Sean Rhody

Sean Rhody is the founding-editor (1999) and editor-in-chief of SOA World Magazine. He is a respected industry expert on SOA and Web Services and a consultant with a leading consulting services company. Most recently, Sean served as the tech chair of SOA World Conference & Expo 2007 East.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


IoT & Smart Cities Stories
Digital Transformation and Disruption, Amazon Style - What You Can Learn. Chris Kocher is a co-founder of Grey Heron, a management and strategic marketing consulting firm. He has 25+ years in both strategic and hands-on operating experience helping executives and investors build revenues and shareholder value. He has consulted with over 130 companies on innovating with new business models, product strategies and monetization. Chris has held management positions at HP and Symantec in addition to ...
Dynatrace is an application performance management software company with products for the information technology departments and digital business owners of medium and large businesses. Building the Future of Monitoring with Artificial Intelligence. Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more busine...
The challenges of aggregating data from consumer-oriented devices, such as wearable technologies and smart thermostats, are fairly well-understood. However, there are a new set of challenges for IoT devices that generate megabytes or gigabytes of data per second. Certainly, the infrastructure will have to change, as those volumes of data will likely overwhelm the available bandwidth for aggregating the data into a central repository. Ochandarena discusses a whole new way to think about your next...
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
All in Mobile is a place where we continually maximize their impact by fostering understanding, empathy, insights, creativity and joy. They believe that a truly useful and desirable mobile app doesn't need the brightest idea or the most advanced technology. A great product begins with understanding people. It's easy to think that customers will love your app, but can you justify it? They make sure your final app is something that users truly want and need. The only way to do this is by ...
DXWorldEXPO LLC announced today that Big Data Federation to Exhibit at the 22nd International CloudEXPO, colocated with DevOpsSUMMIT and DXWorldEXPO, November 12-13, 2018 in New York City. Big Data Federation, Inc. develops and applies artificial intelligence to predict financial and economic events that matter. The company uncovers patterns and precise drivers of performance and outcomes with the aid of machine-learning algorithms, big data, and fundamental analysis. Their products are deployed...
Cell networks have the advantage of long-range communications, reaching an estimated 90% of the world. But cell networks such as 2G, 3G and LTE consume lots of power and were designed for connecting people. They are not optimized for low- or battery-powered devices or for IoT applications with infrequently transmitted data. Cell IoT modules that support narrow-band IoT and 4G cell networks will enable cell connectivity, device management, and app enablement for low-power wide-area network IoT. B...
The hierarchical architecture that distributes "compute" within the network specially at the edge can enable new services by harnessing emerging technologies. But Edge-Compute comes at increased cost that needs to be managed and potentially augmented by creative architecture solutions as there will always a catching-up with the capacity demands. Processing power in smartphones has enhanced YoY and there is increasingly spare compute capacity that can be potentially pooled. Uber has successfully ...
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things'). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing. IoT is not about the devices, its about the data consumed and generated. The devices are tools, mechanisms, conduits. This paper discusses the considerations when dealing with the...