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Dan Allen
Principal Software Engineer - JBoss by Red Hat, Author, Open Source Advocate
To colleagues, Dan's known for his hard work and passion for Open Source technologies. His technical expertise includes Java frameworks (Seam, CDI, Weld, JSF, EJB 3, JPA, Hibernate, Spring), testing frameworks (Arquillian, JUnit, TestNG, Selenium), build tools (Maven 2, Gradle, Ant) and web development (Ajax, JavaScript, CSS) and more.
You can keep up with Dan's discoveries by reading his blogs at http://mojavelinux.com and http://community.jboss.org/people/dan.j.allen/blog or tracking what he's currently up to by following him on Twitter at http://twitter.com/mojavelinux.
Blog
Seam in Action Translations
Posted Monday, January 2, 2012
A long overdue post, I'm still excited to share that Seam in Action was translated (in 2010) into Korean and Simplified Chinese--two languages I can't even pretend to understand. It's pretty strange to see words that you spend countless hours revising lmore »Open letter to the JCP Executive Committee calling for JCP reform
Posted Monday, November 1, 2010
Seizing the opportunity of a new Executive Committee (EC) under a new regime, I'd like to issue a call for reform of the Java Community Process (JCP) to allow it to produce more iterative and timely technology and live up to it's name as a "community promore »Curious how JSF loads without requiring a listener in web.xml?
Posted Thursday, October 7, 2010
I always wondered how Mojarra (the JSF Reference Implementation) managed to initialize without requiring a Servlet lifecycle listener entry (using the <listener> element) in web.xml. I figured it was either initializing on the first request or othemore »Presentations
Write real Java integration tests
In this workshop, you'll discover the missing link in enterprise Java development: simple, portable integration tests. For many, developing with enterprise Java has long been an arduous undertaking because it's been a bear to test. Though development lifmore »Delivering the rich web at low cost: Bidirectional client/server messaging in GWT
End users now expect to be presented with real time data in a web application. But these rich experiences are complex to develop. Tools like GWT enable efficient development of high-performance, rich web applications by shielding developers from JavaScripmore »Going Mobile with Java-Based Technologies Today
Mobile devices such as smartphones and tablets are rapidly becoming the primary Web clients for many users. Taking your existing skills from traditional Web application development and applying them to a mobile interface can be daunting. This session walkmore »Write real Java integration tests
By Dan Allen
In this workshop, you'll discover the missing link in enterprise Java development: simple, portable integration tests.
For many, developing with enterprise Java has long been an arduous undertaking because it's been a bear to test. Though development life is simple with unit tests and mocks, they only get you so far. Eventually, you need to validate that your components interact and operate properly in their intended environment--you real need integration tests.
The main obstacle is that your integration tests live in a different world than your application. We'll overcome this discrepency by adopting a component model for your tests, a service provided by Arquillian. This lab puts Arquillian in your toolbox. The goal is to allow you to make a smooth transition from unit to integration tests.
What's the secret? Arquillian, a container-oriented testing framework for TestNG and JUnit, makes testing enterprise Java applications easy by bringing your test to the runtime rather than requiring you to manage the runtime from your test. Picking up where unit tests leave off, Arquillian enables you to test real components that rely on real enterprise services in a real runtime.
We'll begin by introducing you to the fluent API provided by ShrinkWrap that is used to package a test archive, giving you fine-grained control over which resources are available to be tested. We'll work on examples that demonstrate how the test archive is deployed and executed inside standalone, embedded and remote containers. You'll work through tests that exercise a wide range of technologies, including CDI, EJB, JPA, Spring, JAX-RS, JSF, web UI tests and more.
You'll walk away confident that you can:
- write integration tests just as you would a unit test,
- run those tests in multiple environments (containers) and
- have a tool in your toolbox for both testing and discovery
Join this lab to learn how simple and powerful Java enterprise testing can be.
Delivering the rich web at low cost: Bidirectional client/server messaging in GWT
By Dan Allen
End users now expect to be presented with real time data in a web application. But these rich experiences are complex to develop. Tools like GWT enable efficient development of high-performance, rich web applications by shielding developers from JavaScript, browser quirks and evolving markup languages. However, GWT only addresses the client-side environment. Developers need a similar abstraction for exchanging real time data with the server.
Errai, an open-source GWT extension framework, streams data asynchronously over a high-performance, bidirectional messaging bus. Errai's bus runs concurrently in the browser and on the server (inside a Java Servlet). Errai's push technology delivers data from the server to any connected browser simultaneously and in real time, while the method of communication is transparent to the developer.
Errai also brings CDI, the standard Java programming model, to the browser. What, CDI in the browser? Yep, in JavaScript. This means the developer can use a single programming model for both client and server-side development. To take it a step further, Errai hooks the CDI event notifications to its messaging bus, hiding the high-performance messaging behind CDI's declarative event model. Client or server, it's all just CDI programming.
Come learn how the GWT, Errai and CDI stack enable you to create rich applications that process real time data without all the complexity.
Going Mobile with Java-Based Technologies Today
By Dan Allen
Mobile devices such as smartphones and tablets are rapidly becoming the primary Web clients for many users. Taking your existing skills from traditional Web application development and applying them to a mobile interface can be daunting. This session walks through best practices for building a mobile solution using a combination of JSF, CDI, JMS, data grid, HTML5, and CSS3 technologies.
Attendees will learn which front-end mobile frameworks work best with Java-based technologies and how they can be used to kick-start your own applications. The presentation begins with an overview of technologies used to create the demo and then jumps into the code for a step-by-step tutorial.
Books
by Dan Allen
List Price: $44.99
Price: $29.69
You Save: $15.30 (34%)
-
JBoss Seam is an exciting new application framework based on the Java EE platform that is used to build rich, web-based business applications. Seam is rapidly capturing the interest of Java enterprise developers because of its focus on simplicity, ease of use, transparent integration, and scalability.
Seam in Action offers a practical and in-depth look at JBoss Seam. The book puts Seam head-to-head with the complexities in the Java EE architecture. The author presents an unbiased view of Seam from outside the walls of RedHat/JBoss, focusing on such topics as Spring integration and deployment to alternative application servers to steer clear of vendor lock-in. By the end of the book, you should expect to not only gain a deep understanding of Seam, but also come away with the confidence to teach the material to others.
To start off, you will see a working Java EE-compliant application come together by the end of the second chapter. As you progress through the book, you will discover how Seam eliminates unnecessary layers and configurations, solves the most common JSF pain points, and establishes the missing link between JSF, EJB 3 and JavaBean components. The author also shows you how Seam opens doors for you to incorporate technologies you previously have not had time to learn, such as business processes and stateful page flows (jBPM), Ajax remoting, PDF generation, asynchronous tasks, and more.
All too often, developers spend a majority of their time integrating disparate technologies, manually tracking state, struggling to understand JSF, wrestling with Hibernate exceptions, and constantly redeploying applications, rather than on the logic pertaining to the business at hand. Seam in Action dives deep into thorough explanations of how Seam eliminates these non-core tasks by leveraging configuration by exception, Java 5 annotations, and aspect-oriented programming.
Price: $29.69
You Save: $15.30 (34%)
-
JBoss Seam is an exciting new application framework based on the Java EE platform that is used to build rich, web-based business applications. Seam is rapidly capturing the interest of Java enterprise developers because of its focus on simplicity, ease of use, transparent integration, and scalability.
Seam in Action offers a practical and in-depth look at JBoss Seam. The book puts Seam head-to-head with the complexities in the Java EE architecture. The author presents an unbiased view of Seam from outside the walls of RedHat/JBoss, focusing on such topics as Spring integration and deployment to alternative application servers to steer clear of vendor lock-in. By the end of the book, you should expect to not only gain a deep understanding of Seam, but also come away with the confidence to teach the material to others.
To start off, you will see a working Java EE-compliant application come together by the end of the second chapter. As you progress through the book, you will discover how Seam eliminates unnecessary layers and configurations, solves the most common JSF pain points, and establishes the missing link between JSF, EJB 3 and JavaBean components. The author also shows you how Seam opens doors for you to incorporate technologies you previously have not had time to learn, such as business processes and stateful page flows (jBPM), Ajax remoting, PDF generation, asynchronous tasks, and more.
All too often, developers spend a majority of their time integrating disparate technologies, manually tracking state, struggling to understand JSF, wrestling with Hibernate exceptions, and constantly redeploying applications, rather than on the logic pertaining to the business at hand. Seam in Action dives deep into thorough explanations of how Seam eliminates these non-core tasks by leveraging configuration by exception, Java 5 annotations, and aspect-oriented programming.
