EJB 3.0: getCallerPrincipal in Entity Bean?

[gdellelce]

What is the best way to call getCallerPrincipal in an Entity Bean in EJB3.0 or,
in other words, how I get a reference to an EJBContext?

THANK YOU for all hints in advance
Gianfranco

[manica]

You can inject the context like so:

@Resource javax.ejb.SessionContext ctx;

Darin

[milx]

I'm unable to inject the SessionContext either in the entity itself or in a separate class, it is null at the @PrePersist callback. Does security have to be configured in order to inject the SessionContext?

I can access the EJBContext from the javax.ejb.InvocationContext in an @AroundInvoke interceptor method.

[epbernard]

There is no context for an entity bean.
Only for Session and MDB

[gdellelce]

So the question is: What is the best way to know the caller principal in an Entity Bean in EJB3.0?

[bill.burke]

"gdellelce" wrote:
So the question is: What is the best way to know the caller principal in an Entity Bean in EJB3.0?

Wrap your EntityBean access from within a @Stateless bean and get it from the SessionContext.

Or, get it from your ServletContext if you're invoking on a servlet.

[gdellelce]

I've a table like this:

create table theEntity(
id integer primary key not null,
....
// Audit fields
createdBy varchar(....) not null,
createDate timestamp not null,
modifiedBy varchar(...) not null,
modifyDate timestamp not null
);

so I would like to have an Entity with a @PrePersist and a @PreUpdate
like this


@PrePersist
public void prePersist() {
if (getCreateDate() == null)
setCreateDate(new java.util.Date());
if (getCreatedBy() == null)
setCreatedBy(ctx.getCallerPrincipal().getName());
preUpdate();
}

@PreUpdate
public void preUpdate() {
setModifyDate(new java.util.Date());
setModifiedBy(ctx.getCallerPrincipal().getName());
}

like a database trigger so I don't have to take care of this fields in the code.

Gianfranco

[bigm25]

So it looks like it's not possible to have some "audit"-fields in EJB3.

But JBoss 3 had some "proprietary" extensions for such audit-fields.

Any chance that such extension will be available with JBoss3 AND EJB3 ??

Rgds.

[epbernard]

"bigm25" wrote:
So it looks like it's not possible to have some "audit"-fields in EJB3.

What are you talking about?

[bigm25]

In Jboss 3.2 we were using the following stuff in "jbosscmp-jdb.xml":

<entity>

......
.....
 <audit>
 <created-by>
 <column-name>createdby</column-name>
 </created-by>
 <created-time>
 <column-name>createdtime</column-name>
 </created-time>
 <updated-by>
 <column-name>updatedby</column-name>
 </updated-by>
 <updated-time>
 <column-name>updatedtime</column-name>
 </updated-time>
 </audit>
</entity>

and JBoss happily stored the time/principial of any changes or creations, no matter which code actually triggerd the update/store.

So the question is, how to achieve the same effect with JBoss4 AND EJB3, since there is neither a "jbosscmp-jdbc.xml", nor can we get the callerPrincipal from within an entity.

Did i miss something or wouldn't this be a nice "extension" to implement?

[michael_c_small]

Did you get an answer on this question? I'm trying to perform the same functionality. My only thought was to create a utility session bean that not only injects the session context through a setter method, but also provides a getter method.

[gdellelce]

No answer until now. But I think that a session bean isn't the solution to every situation because you could have cascade persistence and in this case can
miss some modifyBy updates.

[bill.burke]

You have to use a session bean in front or you can use

org.jboss.aspects.security.SecurityContext

which is proprietary

We also have JACC integration with CRUD operations but really haven't documented it well yet.