Thursday Jun 27, 2013

An Overview of Batch Processing in Java EE 7

Up on otn/java is a new article by Oracle senior software engineer Mahesh Kannan, titled “An Overview of Batch Processing in Java EE 7.0,” which explains the new batch processing capabilities provided by JSR 352 in Java EE 7. Kannan explains that “Batch processing is used in many industries for tasks ranging from payroll processing; statement generation; end-of-day jobs such as interest calculation and ETL (extract, load, and transform) in a data warehouse; and many more. Typically, batch processing is bulk-oriented, non-interactive, and long running—and might be data- or computation-intensive. Batch jobs can be run on schedule or initiated on demand. Also, since batch jobs are typically long-running jobs, check-pointing and restarting are common features found in batch jobs.”

JSR 352 defines the programming model for batch applications plus a runtime to run and manage batch jobs. The article covers feature highlights, selected APIs, the structure of Job Scheduling Language, and explains some of the key functions of JSR 352 using a simple payroll processing application. The article also describes how developers can run batch applications using GlassFish Server Open Source Edition 4.0.

Kannan summarizes the article as follows:

“In this article, we saw how to write, package, and run simple batch applications that use chunk-style steps. We also saw how the checkpoint feature of the batch runtime allows for the easy restart of failed batch jobs. Yet, we have barely scratched the surface of JSR 352. With the full set of Java EE components and features at your disposal, including servlets, EJB beans, CDI beans, EJB automatic timers, and so on, feature-rich batch applications can be written fairly easily.”

Check out the article here.

Java Virtual Developer Day Session Videos Available

How are Lambdas handled on a bytecode level?

How does replacing assembly code with Java code improve performance?

Can we send flat files/comma separated/XML files to process in Batch?

In a Java EE app, can I inject an EJB bean inside a REST POJO using @EJB annotation?

Where I can find JavaFX UI controls?

At OTN's Virtual Developer Day, Java experts answered these questions and more. Session are now available for you to view on demand (registration required). This is limited time offer: the sessions will be up to view for free for the next two weeks. 

You can view sessions from these tracks:

VDD
Java SE 8 Track
Learn about the features scheduled for Java SE 8, including Lambda expressions, extension methods for interfaces and a new Date and Time API. Learn how to create basic apps with JavaFX. 

Java EE Track
Take a close look at the new functionality in Java EE 7.
Get presentations and demos on JSON, WebSockets, Batch, Concurrency, JAX-RS 2, JMS 2, 

Java Embedded Track
Provides an introductions to the Raspberry Pi, the Keil board, ARM architecture, and how to make it all work with Java Embedded.

You know Java, now really know Java. Check out the OTN Virtual Developer Day sessions!
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