I need something light, so no EJB or Seam. Would you care to explain what makes EJBs heavy since EJB3? Do you realize that we are not in 2004 anymore? I’d really like to read your definition of light and your arguments (and I will update my answer with pleasure because I’m pretty sure I … Read more
What happens if I promote the column to be a/the PK, too (a.k.a. identifying relationship)? As the column is now the PK, I must tag it with @Id (…). This enhanced support of derived identifiers is actually part of the new stuff in JPA 2.0 (see the section 2.4.1 Primary Keys Corresponding to Derived Identities … Read more
The most robust one I saw off-the-shelf is the URLEncodedUtils class from Apache Http Compoments (HttpClient 4.0). The method URLEncodedUtils.format() is what you need. It doesn’t use map so you can have duplicate parameter names, like, a=1&a=2&b=3 Not that I recommend this kind of use of parameter names.
I solved mine by deleting the .settings folder and .project file in the project and then reimporting the project.
UPDATE Just as an update and to be more explicit, these are the main differences between servlets 2.5 and 3 (I’m not trying to be exhaustive, I’m just mentioning the most interesting parts): Annotations to declare servlets, filters and listeners (ease of development) In servlets 2.5, to declare a servlet with one init parameter you … Read more
Stateless Session Beans (SLSB) are not tied to one client and there is no guarantee for one client to get the same instance with each method invocation (some containers may create and destroy beans with each method invocation session, this is an implementation-specific decision, but instances are typically pooled – and I don’t mention clustered … Read more
Even if I know that this will be controversial, my advice would be to start with Java EE 6 only. So, grab GlassFish v3 and either get the book Beginning Java EE 6 Platform with GlassFish 3: From Novice to Professional or follow the Java EE 6 tutorial. In my opinion, the book (that I’ve … Read more
Why can’t the libraries function outside of the application server environment? Actually they can. Most of the libraries can be directly used standalone (in Java SE) or included in a .war (practically that’s nearly always Tomcat). Some parts of Java EE, like JPA, have explicit sections in their respective specifications that tells how they should … Read more
You create a new project. The new project is your EAR assembly project which contains your two dependencies for your EJB project and your WAR project. So you actually have three maven projects here. One EJB. One WAR. One EAR that pulls the two parts together and creates the ear. Deployment descriptors can be generated … Read more
Enhanced from Source: Servlets Vs Portlets Similarities Servlets and Portlets are web based components which use Java for their implementation. Portlets are managed by a portlet container just like servlet is managed by servlet container. Both static and dynamic content can be generated by Portlets and Servlets. The life cycle of portlets and servlets is … Read more