suexec asked ##java about accessing an EJB from a JSP template.
dreamreal (i.e., your author) put together a simple application (rather imaginatively called “
suexec-war” ) to explore the possibilities. The application was built from Adam Bien‘s minimalistic Java EE 7 Maven archetype, deployed into Wildfly 10.0.
It turns out that to the best of my understanding, injection of an EJB into a JSP is simply unsupported. The JSP can use JNDI to acquire an EJB via JNDI (see source) but the CDI injection never worked.
The process would have been the same no matter what templating library was chosen: you’d take the values you wanted to render and store them somewhere such that the rendering engine could access them. In my case, I could have built a composite object (or even asked Handlebars to call the
greet() method itself, using the
ejb value) but I was aiming for simplicity rather than optimal behavior, following whaley’s “Make it work, make it pretty, make it fast” principle (from “Suffering-oriented programming” )- this is rough code, meant to serve more as a smoke test than an actual example of a great application, so I left off at “make it work,” leaving even “make it pretty” to others.
Comments and improvements welcomed.