Welcome!

Java IoT Authors: Pat Romanski, Yeshim Deniz, Elizabeth White, Liz McMillan, Paul Simmons

Related Topics: Java IoT, IBM Cloud, Weblogic, Machine Learning , Recurring Revenue

Java IoT: Blog Post

OCE EJB Certification Boosts JEE 6 Design Skills

EJB certification Preparation Tips

The latest Java EE 6 Certification for business component developer is divided into two certifications - EJB and JPA. These two certifications are completely different from previous SCBCD/OCPJBCD certification.

The Java Designer's general principle to architecting high scale or low scale application is choosing between EJB Centric Design (with EJB) or Web Centric Design (without EJB). OCE EJB Certification covers all design/developer knowledge required to implement Enterprise Java Bean Components.

Difference between SCBCD 5 and OCE EJB Certification
Oracle Certified Professional, Java EE 5 Business Component Developer (Formerly Sun Certified Business Component Developer (SCBCD)) certification provides knowledge required to develop Java EE 5 EJB and JPA applications. However, OCE EJB only covers Java EE 6 EJB components and OCE JPA covers only Java EE 6 JPA API.

SCBCD 5 = Java EE 5 EJB + Java EE 5 JPA
OCE EJB = Java EE 6 EJB
OCE JPA = Java EE 6 JPA

Oracle introduced new level (Expert) for these certifications instead of regular professional level.

You can find complete info about OCE EJB certification from this article.
http://www.epractizelabs.com/blog2/?p=91

How OCE EJB exam improves your JEE 6 Design Skills?
The certification tests your design decision knowledge about choosing right EJB for the given business problem. Note that, Java EE Architect exam has similar type of questions to test architecture knowledge in business tier components. EJB certification is more focused on design and development of Stateless Session Bean, Stateful Session Bean, Singleton Session Bean and Message Driven Beans.

The exam may not cover questions about web services and it is beyond EJB certification topics, however it is covered on architecture and web services exams.

Introduction to Java EE 6 EJB Types Java EE 6 provides the following EJB components.

  • Stateful Session Bean
  • Stateless Session Bean
  • Singleton Session Bean (new bean introduced in Java EE 6)
  • Message Driven Bean

The exam will tests your applicability knowledge of these components in different business scenarios.  You may also need to have thorough knowledge in annotations to develop these EJB components with timer services, interceptor methods, transactions and security.

Note that Singleton bean is under session type introduced in Java EE 6.

EJB Design decision

Using Stateless Session Beans

You are developing a business component where it does not contain the data for a specific client. Your search component is the best example for this scenario. Note that search requires only one method invocation with search query among all the clients to perform the generic task (executing search query on server side).

Example: Google search, Yahoo search and MSN search.

The following contents are taken from Oracle:
When to use Stateful Session Bean:

  • If the bean does not contain the data for a specific client.
  • If there is only one method invocation among all the clients to perform the generic task.

Using Stateful Session Beans
You are developing a business component where it wants to hold information about the client across method invocation. The most common example ofthis type of implementation would be "Shopping Cart", where it needs to hold client specific information.

Example: Gmail, Yahoo Mail and Facebook.

The following contents are taken from Oracle:
When to use Stateful Session Bean:

  • What the bean wants to hold information about the client across method invocation.
  • When the bean works as the mediator between the client and the other component of the application.
  • When the bean have to manage the workflow of several other enterprise beans.

Using Singleton Session Beans
You can easily decide by the name itself, when you want to have exactly one instance of a session bean go for Singleton session bean. You are developing an application where you want to have some configuration parameters needs to be used across different modules and they needs to be available during your server startup. You can easily implement this scenario by using Singleton Session bean.

The following contents are taken from Oracle:
When to use Singleton Session Bean:

  • State needs to be shared across the application.
  • A single enterprise bean needs to be accessed by multiple threads concurrently.
  • The application needs an enterprise bean to perform tasks upon application startup and shutdown.
  • The bean implements a web service.

Using Message Driven Beans
Unless like regular Java method calls, MDBs are called asynchronously without blocking. Note that Java EE 6 Session beans allow you to send JMS messages and to receive them synchronously but not asynchronously. To avoid tying up server resources, do not to use blocking synchronous receives in a server-side component; in general, JMS messages should not be sent or received synchronously. To receive messages asynchronously, we should use a message-driven bean.

The certification tests coding/design knowledge in the following areas:
Java EE design choices about using different EJB components.

  • Implementing Session Beans with annotations.
  • How to access Session Beans from other components or clients.
  • Implementing Singleton Session Bean
  • The exam requires knowledge in developing Java EE Applications

Using Messaging and Message-Driven Beans.

Using Timer Services in EJB components.

The other topics you must have good knowledge are Interceptor Classes and Methods, Transactions and Security.

What is next?
Go and register for OCE EJB exam from Oracle.
Prepare for your exam with good EJB Study materials like Java EE 6 EJB OCE Training Lab.
Take exam and achieve your potential certification.
Cheers !!!

More Stories By Kenrick Freemen

Kenrick Freemen is a software architect doing consulting for banking and education domains. He has more than 6 years of experience in developing Java EE applications. He is a Sun Certified Java Programmer, Oracle Certified Professional, Java EE 5 Web Services Developer and Sun Certified Java EE Architect.

@ThingsExpo Stories
As data explodes in quantity, importance and from new sources, the need for managing and protecting data residing across physical, virtual, and cloud environments grow with it. Managing data includes protecting it, indexing and classifying it for true, long-term management, compliance and E-Discovery. Commvault can ensure this with a single pane of glass solution – whether in a private cloud, a Service Provider delivered public cloud or a hybrid cloud environment – across the heterogeneous enter...
DXWorldEXPO LLC announced today that ICC-USA, a computer systems integrator and server manufacturing company focused on developing products and product appliances, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. DXWordEXPO New York 2018, colocated with CloudEXPO New York 2018 will be held November 11-13, 2018, in New York City. ICC is a computer systems integrator and server manufacturing company focused on developing products and product appliances to meet a wide range of ...
More and more brands have jumped on the IoT bandwagon. We have an excess of wearables – activity trackers, smartwatches, smart glasses and sneakers, and more that track seemingly endless datapoints. However, most consumers have no idea what “IoT” means. Creating more wearables that track data shouldn't be the aim of brands; delivering meaningful, tangible relevance to their users should be. We're in a period in which the IoT pendulum is still swinging. Initially, it swung toward "smart for smart...
Headquartered in Plainsboro, NJ, Synametrics Technologies has provided IT professionals and computer systems developers since 1997. Based on the success of their initial product offerings (WinSQL and DeltaCopy), the company continues to create and hone innovative products that help its customers get more from their computer applications, databases and infrastructure. To date, over one million users around the world have chosen Synametrics solutions to help power their accelerated business or per...
Dion Hinchcliffe is an internationally recognized digital expert, bestselling book author, frequent keynote speaker, analyst, futurist, and transformation expert based in Washington, DC. He is currently Chief Strategy Officer at the industry-leading digital strategy and online community solutions firm, 7Summits.
In an era of historic innovation fueled by unprecedented access to data and technology, the low cost and risk of entering new markets has leveled the playing field for business. Today, any ambitious innovator can easily introduce a new application or product that can reinvent business models and transform the client experience. In their Day 2 Keynote at 19th Cloud Expo, Mercer Rowe, IBM Vice President of Strategic Alliances, and Raejeanne Skillern, Intel Vice President of Data Center Group and ...
Founded in 2000, Chetu Inc. is a global provider of customized software development solutions and IT staff augmentation services for software technology providers. By providing clients with unparalleled niche technology expertise and industry experience, Chetu has become the premiere long-term, back-end software development partner for start-ups, SMBs, and Fortune 500 companies. Chetu is headquartered in Plantation, Florida, with thirteen offices throughout the U.S. and abroad.
Bill Schmarzo, author of "Big Data: Understanding How Data Powers Big Business" and "Big Data MBA: Driving Business Strategies with Data Science," is responsible for setting the strategy and defining the Big Data service offerings and capabilities for EMC Global Services Big Data Practice. As the CTO for the Big Data Practice, he is responsible for working with organizations to help them identify where and how to start their big data journeys. He's written several white papers, is an avid blogge...
"We are a well-established player in the application life cycle management market and we also have a very strong version control product," stated Flint Brenton, CEO of CollabNet,, in this SYS-CON.tv interview at 18th Cloud Expo at the Javits Center in New York City, NY.
It is of utmost importance for the future success of WebRTC to ensure that interoperability is operational between web browsers and any WebRTC-compliant client. To be guaranteed as operational and effective, interoperability must be tested extensively by establishing WebRTC data and media connections between different web browsers running on different devices and operating systems. In his session at WebRTC Summit at @ThingsExpo, Dr. Alex Gouaillard, CEO and Founder of CoSMo Software, presented ...
Most people haven’t heard the word, “gamification,” even though they probably, and perhaps unwittingly, participate in it every day. Gamification is “the process of adding games or game-like elements to something (as a task) so as to encourage participation.” Further, gamification is about bringing game mechanics – rules, constructs, processes, and methods – into the real world in an effort to engage people. In his session at @ThingsExpo, Robert Endo, owner and engagement manager of Intrepid D...
Recently, WebRTC has a lot of eyes from market. The use cases of WebRTC are expanding - video chat, online education, online health care etc. Not only for human-to-human communication, but also IoT use cases such as machine to human use cases can be seen recently. One of the typical use-case is remote camera monitoring. With WebRTC, people can have interoperability and flexibility for deploying monitoring service. However, the benefit of WebRTC for IoT is not only its convenience and interopera...
Michael Maximilien, better known as max or Dr. Max, is a computer scientist with IBM. At IBM Research Triangle Park, he was a principal engineer for the worldwide industry point-of-sale standard: JavaPOS. At IBM Research, some highlights include pioneering research on semantic Web services, mashups, and cloud computing, and platform-as-a-service. He joined the IBM Cloud Labs in 2014 and works closely with Pivotal Inc., to help make the Cloud Found the best PaaS.
Everything run by electricity will eventually be connected to the Internet. Get ahead of the Internet of Things revolution. In his session at @ThingsExpo, Akvelon expert and IoT industry leader Sergey Grebnov provided an educational dive into the world of managing your home, workplace and all the devices they contain with the power of machine-based AI and intelligent Bot services for a completely streamlined experience.
Cloud-enabled transformation has evolved from cost saving measure to business innovation strategy -- one that combines the cloud with cognitive capabilities to drive market disruption. Learn how you can achieve the insight and agility you need to gain a competitive advantage. Industry-acclaimed CTO and cloud expert, Shankar Kalyana presents. Only the most exceptional IBMers are appointed with the rare distinction of IBM Fellow, the highest technical honor in the company. Shankar has also receive...
Business professionals no longer wonder if they'll migrate to the cloud; it's now a matter of when. The cloud environment has proved to be a major force in transitioning to an agile business model that enables quick decisions and fast implementation that solidify customer relationships. And when the cloud is combined with the power of cognitive computing, it drives innovation and transformation that achieves astounding competitive advantage.
Personalization has long been the holy grail of marketing. Simply stated, communicate the most relevant offer to the right person and you will increase sales. To achieve this, you must understand the individual. Consequently, digital marketers developed many ways to gather and leverage customer information to deliver targeted experiences. In his session at @ThingsExpo, Lou Casal, Founder and Principal Consultant at Practicala, discussed how the Internet of Things (IoT) has accelerated our abilit...
In his session at Cloud Expo, Alan Winters, U.S. Head of Business Development at MobiDev, presented a success story of an entrepreneur who has both suffered through and benefited from offshore development across multiple businesses: The smart choice, or how to select the right offshore development partner Warning signs, or how to minimize chances of making the wrong choice Collaboration, or how to establish the most effective work processes Budget control, or how to maximize project result...
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
Data is the fuel that drives the machine learning algorithmic engines and ultimately provides the business value. In his session at Cloud Expo, Ed Featherston, a director and senior enterprise architect at Collaborative Consulting, discussed the key considerations around quality, volume, timeliness, and pedigree that must be dealt with in order to properly fuel that engine.