How Abap proxy works?

Question

Hi friends,
Can anybody explain me that how actually ABAP proxy works(in both cases clent and server proxy). when shuld we go for proxy.And how proxy seprates business application from technical infrastructure?
If u have any presentation or document on ABAP proxies ,plz send me
Thanks in advance
Shweta

Answer 1

Hi
Adapters are part of the Adapter Framework. Adapters provide the technical connectivity to enable the integration of SAP and non-SAP applications through XI’s Integration Engine.Again, Adapters are used for connectivity from and to external systems with XI that cannot communicate via proxies.Adapters are only required in SAP systems older than 6.20 and external systems.
Systems based on 6.20or higher can communicate directly with proxies.
Proxies
The literal definition of a proxy is an object / process authorized to act for another; an agent or a substitute. In simpler terms, proxies in the XI context are objects used to encapsulate the creation (from a sender system) or parsing of XML (at a receiver system) as well as the communication with the relevant runtime components required to send or receive those messages.
Proxies are generated from Message Interface in IR.
The Proxy Runtime controls these objects / processes, and can itself be controlled by the applications it communicates with. The Proxy Runtime currently has the following components available: 1. ABAP Proxy Runtime – Communication using XI or Web Services a. Web Service Runtime 2. Java Proxy Runtime – Communication using XI (J2EE) The objects that the Proxy Runtime then controls are created via Proxy Generation, for both ABAP and Java. In the following sections a ‘client’ proxy is used by an application to send messages outside of the system it resides in (normally to the IS in this context). Conversely, a ‘server’ proxy is used by an application to receive messages from sources outside itself (again, normally the IS in this context).
Proxies are interfaces which will get executed in the application system. They can be created only in the system from message interfaces using the proxy generation functions. You can use proxies for systems with WAS >=6.20
XI will communicate in native language with SAP systems via proxies. Proxies uses XML - SOAP based communication for both ABAP and Java Proxies.
mainly we go for proxies for adapters less communicaton there
Client Proxy: Proxies created out of Outbound message Interfaces.Here XI is receiving some information and is
acting as a client.
Server Proxy : Proxies created out of Inbound message Interfaces.Here XI sends the information to some other system acting as the Server.
we can create the ABAP proxy in ABAP workbench.
Use
Using ABAP the proxy generation function you can generate ABAP proxy objects to an SAP system from an interface description in the SAP Exchange Infrastructure Integration Repository.
Prerequisites
ABAP proxy objects can only be generated for SAP systems that are based on SAP Web Application Server 6.40.
The proxy generation retrieves the WSDL description of the interface from the Integration Repository using HTTP. The address of the appropriate server is taken from the exchange profile (parameters 1, 2, and 3 u2013 see below). Queries to the Repository are subject to authentication. The user and password for these queries are also taken from here (parameters 5 and 6). Information used to navigate from the ABAP Proxy Generation to the initial page of the Integration Builder is also taken from the exchange profile (parameters 1, 2, and 4).
How to create proxy.
http://help.sap.com/saphelp_nw04/helpdata/en/14/555f3c482a7331e10000000a114084/frameset.htm
How to Activate Proxy.
How do you activate ABAP Proxies?
ABAP Server Proxies (Inbound Proxy)
ABAP Server Proxies
OutBound Proxy (Client Proxy)
Smarter Approach for coding ABAP Proxies
ABAP Proxies in XI(Client Proxy)
File to R/3 via ABAP Proxy with good example
File to R/3 via ABAP Proxy
http://help.sap.com/saphelp_nw2004s/helpdata/en/48/d5a1fe5f317a4e8e35801ed2c88246/frameset.htm
Synchronous Proxies:
Outbound Synchronous Proxy
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/profile/abap%2bproxy%2boutbound%2bprogram%2b-%2bpurchase%2border%2bsend
Inbound Synchronous Proxy
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/profile/abap%2bproxy%2binbound%2bprogram%2b-%2bsales%2border%2bcreation
go thru the weblog How do you activate ABAP Proxies? which explains how to activate proxies
Check this for Use Of Proxies
Choose the Right Adapter to integrate with SAP systems
Hope this is useful and clears your doubts
Thanks
Saiyog