Common Object Request Broker Architecture: Difference between revisions

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Revision as of 20:48, 11 December 2003

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'''CORBA''' ('''Common Object Request Broker Architecture''') is a [[standard]] for [[software component]]s. CORBA defines [[API]]s, [[communication protocol]], and object/service [[information modelsmodel]]s to enable heterogeneous applications[[application]]s written in various languages[[language]]s running on various platforms[[platform]]s to interoperate. CORBA

CORBA therefore provides platform and [[___location transparency]] for well-defined objects[[object]]s, which are the fundamental underpinnings of any [[Distributed computing]] platform.

CORBA is created and controlled by the [[Object Management Group]] (OMG).

In a general sense CORBA "wraps" [[code]] written in another [[language]] into a [[bundle]] containing additional [[information]] on the capabilities of the code inside, and how to call it. The resulting [[wrapped objectsobject]]s can then be called from other programs[[program]]s (or CORBA objects[[object]]s) over the [[network]]. In this sense CORBA can be considered as a machine-readable [[documentation format]], similar to a [[header file]] but with considerably more information.

CORBA uses an [[Interface definition language|interface definition language]], to specify the interfaces[[interface]]s that objects[[object]]s will present to the [[world]]. CORBA then specifies a "[[mapping]]" from [[IDL]] to a specific [[implementation language]] like [[C plus plus|C++]] or [[Java programming language|Java]]. This mapping precisely describes how the CORBA [[data typestype]]s are to be used in both [[client]] and [[server implementationsimplementation]]s. Standard mappings exist for [[C language|C]], [[C plus plus|C++]], [[Smalltalk|Smalltalk]], [[Java programming language|Java]] and [[Python programming language|Python]]. There are also non-standard mappings for [[Perl]] and [[Tcl]] implemented by [[ORB]]s written for those languages.

The CORBA IDL is only one example of an IDL.

CORBA is most widely used with C++ or Java, but it is also usable with Smalltalk, C, Python, Perl and Tcl, and therefore allows easy [[interoperability]] between all those languages.

CORBA is more than just a language and platform neutral [[remote procedure call]] specification. It defines commonly needed services[[service]]s such as transactions[[transaction]]s and [[security]].

==ExternalSee linkalso==

* [[RFC]]

* http://www.omg.org/

* [[RMI]]

* [[DCOM]]

* [[SOAP]]

* [[.NET]]

* [[Web service]]

* [[Distributed systems]]

* [[Servant]]

==External links==

* [http://www.omg.org/ Object Management Group]

* [http://www.corba.org/ Information Board]

* [http://www.omg.org/technology/documents/spec_catalog.htm Catalog of OMG Specifications]

** [http://www.omg.org/technology/documents/idl2x_spec_catalog.htm IDL / Language Mapping]

** [http://www.omg.org/technology/documents/corba_spec_catalog.htm#ccm CORBA Component Model (CCM)]

** [http://www.omg.org/technology/documents/corba_spec_catalog.htm IIOP]

** [http://www.omg.org/technology/documents/corbaservices_spec_catalog.htm Services]

** [http://www.omg.org/technology/documents/corbafacilities_spec_catalog.htm Facilities]

** [http://www.omg.org/technology/documents/domain_spec_catalog.htm Domain]

** [http://www.omg.org/technology/documents/embed_intel_spec_catalog.htm Embedded Intelligence]

** [http://www.omg.org/technology/documents/formal/omg_security.htm Security]

** [http://www.omg.org/technology/documents/modeling_spec_catalog.htm UML, MOF, XMI, CWM]

* [http://www.fpx.de/Combat/ CORBA interface for TCL]