Client Server Systems

Download Beginning JBoss Seam: From Novice to Professional by Joseph Faisal Nusairat PDF

By Joseph Faisal Nusairat

JBoss Seam represents the first counter to the new and winning Spring Framework and maybe even Ruby on Rails framework. The open resource light-weight Java EE five criteria established JBoss Seam framework is part of this moment wave of open resource light-weight Java that’s occurring. starting JBoss Seam: From beginner to specialist goals to exploit this sizzling sector, and goals to be first starting e-book and considered one of might be books to industry during this most likely profitable quarter. This booklet supplies an summary of Seam comparable JSF and EJB three as present in Java EE five; presents info at the instruments to make improvement with Seam more uncomplicated in addition to a functioning intensive demo to really use Seam; and offers tips and tips to utilizing Seam.

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Furthermore, many names in the system were similar to one another, and the Javadoc was quite incomplete. As a result, I used a lot of trial and error in attempting to add the right lists and to retrieve the right lists, and I received many casting errors. I am sure just about every developer has made this mistake as well. You run your code and then up comes a ClassCastException because you casted the wrong type of object from the list. Having errors like this that are relatively simple to make and that pop up only at runtime is unsafe.

Often you see them used as domain objects or even business objects. Instead of having to extend objects and make the classes conform to a specification, they are looser. In fact some frameworks such as Spring wrap the transactioning and other business concepts on the object by using XML to define which POJOs are what. Annotations on POJOs The use of annotations is what gives POJOs their magic. As I said earlier, annotations add discrete functionality to the code without forcing the class to implement any interfaces or be subclassed.

Listing 1-6. println(sum); } As you can see, this is much less complicated. This will take your collection and set it to the variable i, which is of type Integer. So on each loop it will go around storing the CHAPTER 1 ■ WHAT IS JBOSS SEAM? next value of the collection into the variable you defined. This is much simpler and much easier to use, especially if you want to use embedded for loops. You can also use this technique on arrays by replacing your collection with an array of integers (the rest of the code would look exactly the same—note that this will work with primitive data types as well).

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