Seam Framework - JBoss Seam. Enterprise Java Community: JSF Anti-Patterns and Pitfalls. This article covers anti-patterns and pitfalls of day to day JSF development. Most of these issues have kept the author up at night; some of these are the same old challenges with a new face, pun intended. These challenges include performance, tight coupling, thread safety, security, interoperability and just plain ugliness. The Validating Setter Constructors are a good place to put validation logic for a domain model.
The JSF specification defines a dependency injection mechanism for managed beans: setter injection was defined, constructor injection was not. The Validating Setter anti-pattern occurs when code that would normally be in the managed bean constructor is moved to the setter that would be invoked last by JSF dependency injection. <managed-bean><managed-bean-name>iteration</managed-bean-name><managed-bean-class>net.dbyrne.agile.Iteration</managed-bean-class><managed-bean-scope>request</managed-bean-scope><managed-property><! Below is the Iteration class.
The Map Trick <! JSF KickStart Tutorial. In this tutorial, we will show you an example of a JSF application developed without any special IDE. We won't dwell on the theory behind JSF here. There are plenty of sites and books that will do that for you. Instead, we will go quickly into the construction of this simple application that we hope can form the basis for you to start developing more advanced applications. What Is JavaServer Faces? Per our promise, we will keep the background simple. JavaServer Faces is a new framework for building Web applications using Java. JavaServer Faces provides you with the following main features: Page navigation specification Standard user interface components like input fields, buttons, and links User input validation Easy error handling Java bean management Event handling Internationalization support What Will You Need?
You will need the following to complete this tutorial: JDK 1.4 Tomcat 5.0 or any other servlet container (JBoss, Resin, JRun). What Are We Going to Build? JSF Application Structure. JavaServer Faces Technology. JSFTemplating and Woodstock: Component Authoring Made Easy. Oracle Technology Network > Java Software Downloads View All Downloads Top Downloads New Downloads What's New Java in the Cloud: Rapidly develop and deploy Java business applications in the cloud. Essential Links Developer Spotlight Java EE—the Most Lightweight Enterprise Framework?
Blogs Technologies Contact Us About Oracle Cloud Events Top Actions News Key Topics Oracle Integrated Cloud Applications & Platform Services. JSF Central - Your JavaServer Faces Community - Home. GFWiki: JavaServerFacesRI. JavaServer Faces Technology. Enterprise Java Community: Rethinking JSF - The Real Problem. JSF - JavaServer Faces, JCP's component framework for the presentation layer - has had a long and fairly controversial road so far. There's still a lot of dislike floating around for it, as you can see on various TheServerSide threads that deal with it head on. The problem isn't JSF - not for the most part, at least. The real problem is the perception of JSF, as well as how it's being shown and taught. JSF is, as stated and well known, a component framework. Let's look at the components it has: a text input of various sorts (hidden, text area, single field); buttons; radio groups and check boxes; links, anchors, data tables, even simple grids.
Of these, while all are necessary for decent user interfaces, only the tables even come close to being anything like a unique or useful component. The real problem is that JSF, for a component framework, has so few components. What kind of component would be useful? So... where are the login box components? These are potentially equivalent. Enterprise Java Community: JSFTemplate Components. Creating a component in JavaServer Faces is hard. The JavaServer Faces 2.0 EG recognizes the importance of making component authoring easier and has made it one of its top priorities. However, JSF 2.0 is too far off to wait for. Let's look at why it's hard to create a component, then I'll show one way to help simplify this process. To create a component you must: Create a Java class to contain properties and component logic (UIComponent) Create a Java class to write out markup (Renderer) Create a JSP, Facelets, JSFTemplating taglib / factory (or combination of these) Register the component in the faces-config.xml file Figure out how to resolve any resources (.css, .gif, .properties, .js, etc.) your component needs Ensure state is correctly managed for your component Handle "decode" behavior correctly If you look at each of these steps in detail, you'll see there are very specific requirements that you must follow many not obvious.
The resulting page should look something like: Steps: