"CCM
(CORBA Component Model) is a technical improvement on EJB. CCM provides
four sophisticated component types such as service, session, process
& entity. In fact, it is a superset of J2EE component model."
>>
CCM
joins together the best of .NET and J2EE component model. CCM based
solutions will have growing demand from domains such as Aerospace,
Defense, Telecom, Energy etc. >>
CCM vs EJB vs .NET
Overview - OMG CCM Architecture
Component
architecture framework for creating distributed n-tier
application using JAVA and C++
consisting
of
- CCM
server
- CCM
containers that run on CCM server
- CCM
Components that run in these containers
- CCM
Component clients and service like Transactions,
Security, Persistence, Notification
Two types of CCM component
- Basic
component &
- Extended
component: Ports and Assembly Four categories of CCM component
- Service
Component (Stateless): Meant for client and
business logic
- Session
Component (State full): Meant for client sessions
and business logic
- Entity
Component : Provide an abstract view of an
entity (data model)
-
Self Manage Persistence and Container Managed
Persistence
-
Process Component : Meant to model a business
process
-
Self Manage Persistence and Container Managed
Persistence Deployment facilities for component as
well as assembly Interoperability
with EJB Component Metadata
& Metamodel:Interface Repository and MOF
extensions
Note: The highligted
text in color red
denotes
those CCM features which are not available
in EJB
EJB vs CCM
Description
J2EE
CCM
Component
Programming Model
Supports
components in multi-language such as
(C++, Java)
4 sophisticated
choices of component types (service,
session, process & entity)
Components
support new concept called ports for
communication
Support
for both synchronous and asynchronous
communication within single component
definition
Component
supports segmented persistence
Application
by assembly (and not by programming)
using ports
Deployment
of assembly using collocation mechanism
Note: CCM
supports distributed deployment of components
in multiple component servers (CCM servers)
unlike J2EE where EJBs are deployed in single
host server
.NET, J2EE & CCM
Description
.NET
J2EE
CCM
Component
Programming Model
System
construction visible at runtime
Application
by assembly and not by programming
Unified
component programming model for development
& integration
Maintenance
of system by substitution of parts
Domain
models available from OMG (such as
Telecom, Manufacturing, Finance)
Component
architecture framework for creating distributed n-tier
application using JAVA and C++
consisting
of 
