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Java EE 6 Testing Part I – EJB 3.1 Embeddable API

December 6th, 2011

One of the most common requests we hear from Enterprise JavaBeans developers is for improved unit/integration testing support.
EJB 3.1 Specification introduced the EJB 3.1 Embeddable API for executing EJB components within a Java SE environment.

Unlike traditional Java EE server-based execution, embeddable usage allows client code and its corresponding enterprise beans to run within the same JVM and class loader. This provides better support for testing, offline processing (e.g. batch), and the use of the EJB programming model in desktop applications.
[...]
The embeddable EJB container provides a managed environment with support for the same basic services that exist within a Java EE runtime: injection, access to a component environment, container-managed transactions, etc. In general, enterprise bean components are unaware of the kind of managed environment in which they are running. This allows maximum reusability of enterprise components across a wide range of testing and deployment scenarios without significant rework.

» Read more: Java EE 6 Testing Part I – EJB 3.1 Embeddable API

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Stripes framework XSS Interceptor

August 3rd, 2010

I have created a new project at Google Code named Stripes XSS Interceptor.

This project escapes all the parameters that Stripes binds during its Validation & Binding phase using a wrapped request object (a convenient implementation of the HttpServletRequest interface).

The code follows the XSS (Cross Site Scripting) security guidance posted at OWASP (Open Web Application Security Project).

Please feel free to report any bug you find in the project Issue Tracking.

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Maven 2 Cobertura Plugin – Updated

April 14th, 2010

My previous Maven 2 Cobertura Plugin article gives a workaround for the very buggy version 2.1 of the Cobertura Maven Plugin.

This bug is fixed on versions 2.2 or higher, and consequently, that workaround does not work anymore.
For those reading my previous article and having difficulties configuring the plugin, this is my actual configuration.

» Read more: Maven 2 Cobertura Plugin – Updated

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Run PHP on Google App Engine

December 14th, 2009

By adding Java to their App Engine, Google has opened the door for a whole slew of languages that have been implemented on the JVM, now including PHP via Quercus.

This weekend I decided to give it a try and deploy an old tutorial of mine – PHP Tutorials – on GAE.

I must admit that I was pleasantly surprised by how effortless it was. OK, it’s a very rudimentary PHP application, the only PHP code used was to run the examples described on the code blocks and do some includes; nevertheless I didn’t feel the need to change a single line of code.

Also, deploying a Java application to GAE is simpler than a Python one. Not only because you have a very handy Eclipse plugin, but you will also find configuring the file appengine-web.xml a lot easier when compared to app.yaml.

All you need to do in order to deploy a PHP application, at least as simple as the one I’ve tried, is to follow these steps:
» Read more: Run PHP on Google App Engine

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Java Web Development with Stripes framework

September 17th, 2009

Stripes Framework presentation for the Portuguese Java User Group session on the JavaPT09 event.

The used source code is also available.

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Unit Testing JBoss 5 Services

September 2nd, 2009

The JBoss Microcontainer is a refactoring of JBoss’s JMX Microkernel to support direct POJO deployment and standalone use outside the JBoss application server.
It allows the creation of services using simple Plain Old Java Objects (POJOs) to be deployed into a standard Java SE runtime environment.

JBoss Microcontainer uses dependency injection to wire individual POJOs together to create services. Configuration is performed using either annotations or XML depending on where the information is best located.

The goal of this article is to show how easy it is to test these services using TestNG testing framework.
» Read more: Unit Testing JBoss 5 Services

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Axis 1.4 Read timed out and HTTP 1.1

April 6th, 2009

For those getting a SocketTimeoutException when calling an Axis 1.4 Web Service.
This may be a solution for your problem.

If your log show an error similar to this:

12:38:51,693 ERROR [TerminalSessionHelper] ; nested exception is:
	java.net.SocketTimeoutException: Read timed out
AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
 faultSubcode:
 faultString: java.net.SocketTimeoutException: Read timed out
 faultActor:
 faultNode:
 faultDetail:
	{http://xml.apache.org/axis/}stackTrace:java.net.SocketTimeoutException: Read timed out
...

And your call looks like this:

TerminalSessionService terminalSessionService = new TerminalSessionServiceLocator();

TerminalSession_PortType terminalSession_PortType = terminalSessionService.getTerminalSession();

((TerminalSessionSOAPBindingStub) terminalSession_PortType).setTimeout(15000);

Try to use CommonsHTTPSender as the Transport Sender of the Axis client:

BasicClientConfig basicClientConfig = new BasicClientConfig();
SimpleChain simpleChain = new SimpleChain();

simpleChain.addHandler(new CommonsHTTPSender());
basicClientConfig.deployTransport("http", simpleChain);

TerminalSessionService terminalSessionService = new TerminalSessionServiceLocator(basicClientConfig);

TerminalSession_PortType terminalSession_PortType = terminalSessionService.getTerminalSession();

((TerminalSessionSOAPBindingStub) terminalSession_PortType).setTimeout(15000);

This also has the advantage to use HTTP 1.1 instead of HTTP 1.0.
Note: You will need to add the common-httpclient.jar and common.codec.jar to the jar directory for this to work.

Still want to use HTTP 1.0? No problem, just add the following line of code:

((TerminalSessionSOAPBindingStub) terminalSession_PortType)._setProperty(
        MessageContext.HTTP_TRANSPORT_VERSION, HTTPConstants.HEADER_PROTOCOL_V10);

Hope this can save your time. Axis can be really painful…

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JBoss PojoCache configuration

March 17th, 2009

Everyone knows that documentation is not one of JBoss strengths.
This article is meant to fill this gap. It describes and exemplifies how to configure JBoss PojoCache as a MBean service, using loadtime transformations with JBossAop framework, so you don’t need precompiled instrumentation.

Introduction

This section gives you an introduction about PojoCache and its advantages over TreeCache (a plain cache system).

PojoCache is an in-memomy, transactional, and replicated POJO (plain old Java object) cache system that allows users to operate on a POJO transparently without active user management of either replication or persistency aspects. PojoCache, a component of JBossCache (uses PojoCache class as an internal implementation, the old implementation TreeCacheAop has been deprecated.), is the first in the market to provide a POJO cache functionality. JBossCache by itself is a 100% Java based library that can be run either as a standalone program or inside an application server.

TreeCache limitations:

  • Users will have to manage the cache specifically; e.g., when an object is updated, a user will need a corresponding API call to update the cache content.
  • If the object size is huge, even a single field update would trigger the whole object serialization. Thus, it can be unnecessarily expensive.
  • The object structure can not have a graph relationship. That is, the object can not have sub-objects that are shared (multiple referenced) or referenced to itself (cyclic). Otherwise, the relationship will be broken upon serialization.

PojoCache advantages:

  • No need to implement Serializable interface for the POJOs.
  • Replication (or even persistency) is done on a per-field basis (as opposed to the whole object binary level).
  • The object relationship and identity are preserved automatically in a distributed, replicated environment. It enables transparent usage behavior and increases software performance.

» Read more: JBoss PojoCache configuration

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Stripes framework and jQuery Autocomplete

December 16th, 2008

I really enjoy jQuery. But finding the right UI widget can be a daunting task.
Autocomplete is one of those widgets.

I decided to share an asynchronous example on how to use the jQuery Autocomplete plugin with Stripes.

Here’s an example output:
Stripes and jQuery Autocomplete example
» Read more: Stripes framework and jQuery Autocomplete

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Stripes framework and jQuery: AJAX forms and HTTP Session Validation

October 23rd, 2008

This example was greatly inspired by the Stripes and jQuery AJAX Forms article from Freddy Daoud, but with some nice improvements

Last week I was working on a new Stripes/AJAX example. It involves having a table listing entities, being the last row of the table a form for adding new ones.
The form gets submitted via AJAX, using jQuery, and the response is validated in order to check if the HTTP session is still valid.

If everything is OK, the list is refreshed and a success message appears. On the other hand, if validation errors occur, the list is refreshed and an error message appears.
Also, if the user’s session has expired on the server, an alert is shown to inform the user that his session is invalid, and the page is reloaded so the user can login once more.
» Read more: Stripes framework and jQuery: AJAX forms and HTTP Session Validation

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