Hello *,
in our use case, quite a few EJB methods (mostly of stateless session beans) need to
communicate with many EJBs on different servers (some on the same server, but then mostly
still as different user). Therefore, we want to stick the authentication info to the EJBs,
making code like this possible:
EjbOfPartner ejbOfPartner1 =
EjbOfPartnerUtil.getHome(getInitCtxProps(partner1)).create();
| EjbOfPartner ejbOfPartner2 =
EjbOfPartnerUtil.getHome(getInitCtxProps(partner2)).create();
| EjbOfPartner ejbOfPartner3 =
EjbOfPartnerUtil.getHome(getInitCtxProps(partner3)).create();
|
| ejbOfPartner1.doSomeBusiness(...);
| Result result = ejbOfPartner2.doSomethingElse(...);
| ejbOfPartner1.doSomethingWithResult(result);
| ejbOfPartner3.doWhatever(...);
| // ... and so on ...
Without this feature, the user of our framework would need to track manually for which EJB
handle he needs to be authenticated how; and then login, logout, login, etc. all the time.
This makes things extremely error-prone and some code even impossible (e.g. where EJB
handles are provided by a factory).
Already a while ago, I tried to use org.jboss.security.jndi.LoginInitialContextFactory.
But after analysing the source-code ('cause it didn't work), I saw that it
doesn't really stick the user data to the EJB handle, but instead only performs a
login. Hence, in my above example, the calls to ejbOfPartner1 and 2 fail (if the EJBs are
on a remote server) or communicate with partner3 instead of 1/2 (if the EJBs are on the
same server). This is, because the user required for partner3 is logged in globally (for
all EJB handles) after the last EjbOfPartnerUtil.getHome(...).create().
Therefore, I hacked a workaround consisting of an InitialContextFactory, a Context and an
Interceptor. This seemed to work fine for JBoss 3.2.x (not sure anymore, but I think it
was 3.2.5). Unfortunately, I didn't work on the code requiring this feature for quite
a while and didn't recognize that it broke some time ago.
You can find details for my workaround here, btw.:
* source
* wiki page
* issue tracking
Now, I need to get it running again, and I was already extremely happy when I saw the new
org.jboss.security.jndi.JndiLoginInitialContextFactory which seemed (according to the wiki
page) to do exactly what I need.
Unfortunately, however, it doesn't :-( and actually behaves in the same wrong way as
my workaround does. I tried to set the flags jnp.restoreLoginIdentity and
jnp.multi-threaded, but it didn't help. What am I doing wrong? Doesn't
JndiLoginInitialContextFactory support what I need?
Well, I thought I'll take a look at my workaround again and I saw that the
org.jboss.invocation.InvocationContext which I use to pass my auth info, is somehow reused
for different EJB handles pointing to different partners (maybe there's a new caching
feature?). This leads to wrong authentications :-( Maybe I should add, that multiple
partners can be hosted on the same machine and thus connections to different partners can
sometimes go to the same server (even locally, i.e. loopback).
Is there an easy way to do what I want? Maybe using JndiLoginInitialContextFactory
correctly (in case I'm doing this wrong) or using another InitialContextFactory (which
one?)... any ideas?
If there's no such solution, can you give me hints on how I can pass the information
from my own InitialContextFactory to an interceptor?
Or is there a totally different and better way to achieve this? Maybe EJB3?
Thanks a lot in advance!
Best regards, Marco :-)
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