Is there an official correlation between Java EE / J2EE and J2SE / JDK versions? Sun may try to keep some kind of “correlation” to not confuse users and for marketing purpose but, AFAIK, no, there is no official correlation (and maintaining the pseudo synchronisation might become harder in the future as the JDK evolves … Read more
You need a ResourceLink in your META-INF/context.xml file to make the global resource available to the web application. <ResourceLink name=”jdbc/mydb” global=”jdbc/mydb” type=”javax.sql.DataSource” />
Your call to methodB() is an ordinary call of a method, not intercepted by the EJB container; at run-time the EJB container will inject a proxy and not an instance of your class, this is the way it intercepts calls and setup the environment before calling your method. If you use this you’re calling a … Read more
Here is nice image which explains it. Web profile is a subset of Java EE and it’s purpose is to allow developers to create more lightweight applications which can be used inside simple servlet container (like Tomcat or Jetty).
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
Resin 3.0 documents this behavior: load-on-startup can specify an (optional) integer value. If the value is 0 or greater, it indicates an order for servlets to be loaded, servlets with higher numbers get loaded after servlets with lower numbers. The JSP 3.1 spec (JSR 340) says this on page 14-160: The element load-on-startup indicates that … Read more
RESTful is more an architecture style than a different technology. In server perspective, it is designed to be entirely stateless and self-contained on a per-request basis (i.e. there are no sessions). In client perspective, it’s more a way of getting information in different formats via URLs with (self-documenting) path parameters instead of request parameters. Surely … Read more
Java EE 8 and up If you’re on Java EE 8 or newer, put @RememberMe on a custom HttpAuthenticationMechanism along with a RememberMeIdentityStore. @ApplicationScoped @AutoApplySession @RememberMe public class CustomAuthenticationMechanism implements HttpAuthenticationMechanism { @Inject private IdentityStore identityStore; @Override public AuthenticationStatus validateRequest(HttpServletRequest request, HttpServletResponse response, HttpMessageContext context) { Credential credential = context.getAuthParameters().getCredential(); if (credential != null) { … Read more
Stateful session beans (SFSB) are not exactly what you think they are. You seem to think that they behave somehow like session scoped JSF managed beans. This is untrue. The term “session” in EJBs has an entirely different meaning than the HTTP session which you’ve had in mind. The “session” in EJBs must be interpreted … Read more
Just implement Serializable If you’re getting a NotSerializableException like follows, java.io.NotSerializableException: bean.ProjectAreaBean then it simply means that the class as identified by the fully qualified name in the exception message (which is bean.ProjectAreaBean in your case) does not implement the Serializable interface while it is been expected by the code behind. Fixing it is relatively … Read more