jakarta ee - How to access deployment parameter from within EJB

Question

In a Java EE 6 Web application, I would like to access a deployment parameter (a string value) from within an EJB.

I know that I can define a Context Parameter in web.xml descriptor, and I'll be able to access it through javax.faces.context.ExternalContext#getInitParameterMap(), when I am in a JSF bean, and through getServletContext() from within a Servlet, but this is not the case, indeed, because I am in an EJB.

So, the question is: is there any standard (and possibly clean) way to accomplish this goal?

Answer 1

After further research, I have found out the use of env-entry annotation in web.xml.:

<env-entry>
    <env-entry-name>myEnvEntry</env-entry-name>
    <env-entry-type>java.lang.String</env-entry-type>
    <env-entry-value>MyEnvEntryValue</env-entry-value>
</env-entry>        

The env-entry can be accessed in various ways from an EJB. The simplest is the use of @Resource annotation (requires CDI):

@Resource(name="myEnvEntry")
private String myEnvEntry;

Links: Configure your EJB 3 with envirnoment entries using ENC