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Java Web Services: Getting Started

March 9, 2010 by Frank Salinas · Leave a Comment 

When it came time for me to tackle my first web service implementation I ran into a lot of problems. Here I will write a series of articles to address the questions and problems I encountered in hopes of helping you get started in developing web services faster than I did. The following example will show you how to create a web service using JAX-WS and packaged as a servlet. Read more

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The EJB Specification, Concurrency, and Batch Processing

March 1, 2009 by Frank Salinas · 1 Comment 

The EJB specification does not leave much room for implementing concurrent processing within the EJB container. This poses a problem to developers who need to implement solutions for processing long running batch processes as part of the business logic of an application. The EJB specification states the following:

The enterprise bean must not attempt to manage threads. The enterprise bean must not attempt to start, stop, suspend, or resume a thread, or to change a thread’s priority or name. The enterprise bean must not attempt to manage thread groups.

These functions are reserved for the EJB container. Allowing the enterprise bean to manage threads would decrease the container’s ability to properly manage the runtime environment.

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Web Services on JBoss

October 29, 2008 by Frank Salinas · 7 Comments 

I’ve been working on a project which requires developing some web service endpoints. This is the first time I’ve had to develop Java web services and I came across a couple of issues which slowed me down. I am using JBoss 4.0.5.GA which comes packaged with JBossWS 1.0.3.SP1. I started out by going through the examples provided in Chapter 12 of the J2EE Users Guide which helped me get a template for my project. As I attempted to expand my project with multiple service endpoints I received errors during deployment using JBossWS 1.0.3.SP1.  I decided to upgrade to JBossWS 1.2.1.GA which is packaged in the 4.2.3.GA certified distribution of JBoss Application Server. The upgrade solved some of my initial issues but introduced a couple more, some of which are not documented in the official JBossWS users guide. Read more

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