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Q about Entity Bean DD

 
Deep Chand
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See the DD section for entity bean at the end (from MZ Study Notes):

a) Does this mean that either local, local-home OR home, remote MUST be specified? OR you can get away without speciying them at all.

b) MZ study notes say:
" an optional specification of the entity bean�s abstract schema name (CMP only), an optional list of container-managed fields (CMP only), an optional specification of the primary key field (CMP only)"

Does this mean that in CMP also they are optional OR if the bean is CMP then they MUST be specified?

<!ELEMENT entity (description?, display-name?, small-icon?,
large-icon?, ejb-name, home?, remote?, local-home?,
local?, ejb-class, persistence-type, prim-key-class,
reentrant, cmp-version?, abstract-schema-name?,
cmp-field*, primkey-field?, env-entry*, ejb-ref*,
ejb-local-ref*, security-role-ref*, security-identity?,
resource-ref*, resource-env-ref*, query*)>
 
Paul Codillo
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a) Does this mean that either local, local-home OR home, remote MUST be specified? OR you can get away without speciying them at all.
- MDBs do not have client views, so component and home interfaces do not make sense to them.

b) MZ study notes say:
" an optional specification of the entity bean�s abstract schema name (CMP only), an optional list of container-managed fields (CMP only), an optional specification of the primary key field (CMP only)"
Does this mean that in CMP also they are optional OR if the bean is CMP then they MUST be specified?
- This means they have to be filled in for CMP entity beans.
[ March 22, 2005: Message edited by: paul.com ]
 
Deep Chand
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No but every where it's written that the 5 mandatory elements for entity beans are:

ejb name, ejb class, prim key class, reentrant and persistence type.

What about remote, home interfaces etc? Don't they need to be be mandatory?

Thanks
Deep
 
Stefan Guilhen
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Suppose that remote and home were mandatory. What would this imply? That the bean provider would need to define the remote component and home interfaces of the entity bean even when it does not have a remote view! The same applies to local and local-home: if they were mandatory the bean provider would need to define them for an entity even when it does not define a local view.
The spec says that the entity bean must define at least one set of interfaces (remote or local or both) and the container will check this at deployment time. The DTD just don't make them mandatory because that would be too restricting.

Regards,
Stefan
[ March 22, 2005: Message edited by: Stefan Guilhen ]
 
Deep Chand
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Thanks. Now it makes sense to me.
 
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