On Thu, Aug 26, 2004 at 01:38:51AM +0200, Jacek Laskowski wrote:
> Mark Lybarger wrote:
>
> >is it possible for me to configure openejb to make available a
> >datasource outside of using a resource-ref?
>
> You don't have to use resource-ref. You can declare
> InitialContextFactory as the Local or Remote one of OpenEJB and use the
> stuff bound to it. Resource-refs are the way to abstract a code from the
> real container of these refs. Using resource-ref allows you to make
> changes to resource configuration outside of your code (no recompilation
> necessary then).
>
> Just attach itself to OpenEJB JNDI via the Local or Remote
> InitialContext (see http://www.openejb.org/embedded.html or
> http://www.openejb.org/remote-server.html) and lookup what's available
> casting where required to the appropriate type, e.g. javax.sql.DataSource.
>
A couple corrections: using resourc-refs is the only J2EE or EJB
compliant way to get a DataSource from an enterprise bean; datasources
aren't available through either the Local or Remote InitialContext
implementations.
The compliant way is to do this:
<resource-ref>
<res-ref-name>my/favorite/datasource/foo</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
These are all valid ways to get that datasource.
-----------------
InitialContext ctx = new InitialContext();
DataSource ds = (DataSource)
ctx.lookup("java:comp/env/my/favorite/datasource/foo");
-----------------
Context ctx = new InitialContext();
ctx = (Context) ctx.lookup("java:comp/env");
// ...
DataSource ds = (DataSource) ctx.lookup("my/favorite/datasource/foo");
-----------------
Context ctx = new InitialContext();
ctx = (Context) ctx.lookup("java:comp/env");
// ...
ctx = (Context) ctx.lookup("my/favorite");
// ...
DataSource ds = (DataSource) ctx.lookup("datasource/foo");
-----------------
Everything the bean looks up from JNDI must be relative to
"java:comp/env" in one way or another.
-David
