When to use which adapter?

Hi Experts,
I have an query regarding use and advantages of adapter!
I want to know in what preference should the adpaters be used IDOC,RFC,PROXIES. what should we consider to use first and what are the advanatages of one over the other.
Regards .
Saras Jain

Hi Saras Jain ,
These r the details regarding Adapters:
Adapter framework
What are XI Adapters?
Adapters enable communication between the XI integration engine and an application system. This leads to the compatibility between heterogeneous systems.Adapters convert the XI protocol (SOAP with attachments over HTTP) to the protocol spoken by the application system and vice-versa.The key purpose of XI is to integrate heterogeneous systems and adapters are the key enabler to achieving this goal
Adapter Categories
Application adapters provided by SAP (IDoc and RFC) and 3rd party vendors (Seeburger, Siebel, Oracle, ...)
Technical adapters relate to specific protocols
File systems (FTP / File)
RDBMS systems (JDBC)
Messaging systems (JMS)
Web services (SOAP)
Mail servers (SMTP)
SAP Business Connector
Marketplaces
Industry standard adapters
RosettaNet
CIDX
The Adapter Engine
The XI Adapter engine is the home of the majority of the XI adapters. Only the IDoc adapter and the plain HTTP adapter do not reside on the adapter engine. They reside on the Integration Server.
It is fully integrated in to the XI landscape with tools provided for configuration, logistics and monitoring. It's Adapter Framework is based on the JCA.
SAP XI requires an adapter framework to communicate outside of the SAP system. These adapters translate code from external applications to an XML message for NetWeaver processes using the Java Connector Architecture.It is a part of the Adapter Engine, which provides interfaces for configuring, managing, and monitoring adapters.
Structure of the Adapter Framework
http://help.sap.com/saphelp_nw04/helpdata/en/fd/16e140a786702ae10000000a155106/content.htm
Adapter for SAP XI environment
http://publib.boulder.ibm.com/infocenter/wbihelp/v6rxmx/index.jsp?topic=/com.ibm.wbia_adapters.doc/doc/sap_xi/sapximst11.htm
List of all adapters compatible with XI 3.0
http://searchsap.techtarget.com/expert/KnowledgebaseAnswer/0,289625,sid21_gci1229988_tax304527,00.html
Adapter and Module Development
http://help.sap.com/saphelp_nw04/helpdata/en/8b/895e407aa4c44ce10000000a1550b0/content.htm
Legacy Integration with the SAP XI Adapter
http://www.makdata.de/www_makdata/sites/www.makdata.de/en/solutions/solutions02/downloads/SAP_XI_Adapter_mak_data_news_23_en.pdf
Installing the SAP XI Integration Components of the XI Adapter
http://documentation.softwareag.com/crossvision/xio311/install/sapXiInstall.htm
cheers!
gyanaraj
***Pls reward points if u find this informative

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