Hello, tomcat community!
I have a question regarding ejb-s and the J2EE-isms.
I know that the J2EE datasources are now available
with Tomcat. I may just configure conf/server.xml,
describe the datasource and go ahead. Very good.
1)
What about EJB-s? I understand that J2EE 1.3
mandates that the InitialContext be created with
as zero-argument constructor and that this
context should contain the EJB-s that have been
requested via <ejb-ref> and <ejb-local-ref>
elements in web.xml (along with other JNDI stuff
from web.xml)
1.1) Is this ejb functionality availalbe?
1.2) How to configure that?
1.3) What ejb containers may be used with Tomcat in
a J2EE compliant way?
1.3.1) What ejb containers may run in the same jvm
with Tomcat?
1.3.2) What ejb containers may run in a separate jvm?
2)
I understand that if we create InitialContexts
with special constructor and a special Map of parameters -
this has little to do with J2EE for web containers.
I guess that in this situation
- every creation of InitialContext requires establishing at
least one new network connection
- hence may be as slow as creating a new database connection
- the InitialContext obtained has nothing to do with the
<ejb-ref>, <ejb-local-ref> in web-xml
and other environment stuff from web.xml.
Are all these statements correct?
3)
I failed to find anything in the docs.
The <Ejb> element in the servler.xml
has remained a mistery for me.
Is it just a way to create a <ejb-ref>
entry that is virtually added to all web.xml
files?
3.1) If yes, where's the <ejb-local-ref> analog?
4) Would also be interesting to hear
comments on the Tomcat 3.x family too
5) How are EJBs binded to JNDI namely for
5.1) JBoss+Tomcat 3.2?
5.2) JBOss+Tomcat 4?
I know that this is best read in docs,
but in general, just some configuration
file per web app? Additional deployment
descriptor put to WEB-INF?
(Plus some JBoss-private setup)
Do these JBoss+Tomcat combinations always
run in the same jvm (this is actually a
duplicate
6) Can JBoss/Tomcat run in differenct jvms?
(Any versions of both?)
--
- Anton
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