About Proxies

Question

Hi all
give me clear information about
what is proxies
why we go for proxies
when we go for ABAP proxy and Java proxy
How to configure ABAP proxy
How to configure Java proxy
How to debug a proxy
How to handle errors in Proxies

Answer 1

HI
We can use proxies to communicate with integration engine.
Proxies are objects (classes & methods) generated from a language.
Proxy communication starts with objects in integration repository and adapter communication starts with application system.
Out-Side In Development: Here we define language independent message interfaces in to integration repository. Then we can use proxy generation to create java or abap proxies.
Proxies communicate with the XI server by means of native SOAP calls over HTTP .RFC does not, so you have to convert from SOAP to RFC calls and vice versa. So XML conversion is required.
ABAP Proxies uses Webservice and Http Protocols.
If you use ABAP Proxy , you can reduce the overhead calling the function again and again.
What are Proxies?
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.
The biggest advantage of the proxy is that it always by passes the Adapter Engine and will directly interact with the application system and Integration engine - so it will and should give us a better performance.
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. The Proxy Runtime controls these objects / processes, and can itself be controlled by the applications it communicates with.
What is Proxy communication.
The aim of proxy communication is to bypass the adapter engine thus providing an adapterless communication. With proxy you save on performance over using adapters and also it reduces complexity.
Where Proxy communication is used i.e in which type of systems or situations.
The Proxy currently has the following components available:
1. ABAP Proxy u2013 Communication using XI or Web Services
2. Java Proxyu2013 Communication using XI (J2EE)
JAVA Proxies:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a068cf2f-0401-0010-2aa9-f5ae4b2096f9
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/f272165e-0401-0010-b4a1-e7eb8903501d
ABAP Proxies:
/people/sap.user72/blog/2005/12/13/integration-builders-through-proxy-server-part--2
/people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy
/people/arulraja.ma/blog/2006/08/18/xi-reliable-messaging-150-eoio-in-abap-proxies
/people/stefan.grube/blog/2006/07/28/xi-debug-your-inbound-abap-proxy-implementation
/people/michal.krawczyk2/blog/2006/04/19/xi-rfc-or-abap-proxy-abap-proxies-with-attachments
/people/sukumar.natarajan/blog/2007/01/07/how-to-raise-alerts-from-abap-proxy
/people/sravya.talanki2/blog/2006/07/28/smarter-approach-for-coding-abap-proxies
ON SDN TV
https://www.sdn.sap.com/irj/sdn/advancedsearch?query=abap%20proxy%20xi&cat=sdn_all&start=11#
Proxies communicate with the XI server by means of native SOAP calls over HTTP .RFC does not, so you have to convert from SOAP to RFC calls and vice versa. So XML conversion is required.
ABAP Proxies uses Webservice and Http Protocols. And if you use RFC it is mainly meant for Sync. call. But Proxies is used for both Sync and Async.
If you use ABAP Proxy , you can reduce the overhead calling the function again and again.
/people/vijaya.kumari2/blog/2006/01/26/how-do-you-activate-abap-proxies - Activate Proxy
/people/siva.maranani/blog/2005/04/03/abap-server-proxies - ABAP Server Proxy
/people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy - ABAP Client Proxy
Re: JDBC Sender select/update problem
What is the difference between server proxy and client proxy.
If u generate proxy for outbound interface then its client proxy and for inbound interface its server proxy.
In client proxy u can call the method to send messages but u can't modify it but in server proxy its possible to write a user code within the method to execute proxy.
CLIENT PROXY:
A WSDL description from a UDDI server (or an Internet page) is usually used to make a service executable in the Internet and to describe the interface of this service. You require a client proxy and not a server proxy to call this service by using the Web service infrastructure.
SERVER PROXY:
You can only generate ABAP server proxies from a WSDL description if they originate in the Integration Repository.You can also generate server proxies for Java and client proxies for ABAP from message interfaces.
There are two Types of proxies which can be done by ABAP or JAVA
u2018clientu2019 proxy is used by an application to send messages outside of the system it resides in (normally to the IS in this context).
u2018serveru2019 proxy is used by an application to receive messages from sources outside itself (again, normally the IS in this context).
To test a connection - /people/vijaya.kumari2/blog/2006/01/26/how-do-you-activate-abap-proxies
Client Proxy - /people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy
Server Proxy - /people/siva.maranani/blog/2005/04/03/abap-server-proxies
Testing proxy - /people/stefan.grube/blog/2006/07/28/xi-debug-your-inbound-abap-proxy-implementation
JAVA Proxies:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a068cf2f-0401-0010-2aa9-f5ae4b2096f9
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/f272165e-0401-0010-b4a1-e7eb8903501d
ABAP Proxies:
/people/sap.user72/blog/2005/12/13/integration-builders-through-proxy-server-part--2
/people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy
/people/arulraja.ma/blog/2006/08/18/xi-reliable-messaging-150-eoio-in-abap-proxies
/people/stefan.grube/blog/2006/07/28/xi-debug-your-inbound-abap-proxy-implementation
/people/michal.krawczyk2/blog/2006/04/19/xi-rfc-or-abap-proxy-abap-proxies-with-attachments
/people/sukumar.natarajan/blog/2007/01/07/how-to-raise-alerts-from-abap-proxy
/people/sravya.talanki2/blog/2006/07/28/smarter-approach-for-coding-abap-proxies
ON SDN TV
https://www.sdn.sap.com/irj/sdn/advancedsearch?query=abap%20proxy%20xi&cat=sdn_all&start=11#
Get back if u not getting these...
These blogs will answer all your questions
Proxies are nothing but interfaces , which will directly communicate witht he IS with out any adapter. these are adapter less communication
Proxies Help file
http://help.sap.com/saphelp_nw04/helpdata/en/86/58cd3b11571962e10000000a11402f/content.htm
How to Activate Abap Proxy
/people/vijaya.kumari2/blog/2006/01/26/how-do-you-activate-abap-proxies
File to R3 via ABAP Server Proxy
/people/prateek.shah/blog/2005/06/14/file-to-r3-via-abap-proxy
ABAP Client proxy
/people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy
As we know, the role of SAP XIu2019s integration broker is basically to integrate SAP and non-SAP systems, as in the integration of an SAP R/3 system with a database using adapters. SAP XI provides various adapters to integrate different types of systems.
But in some of real-time scenarios, itu2019s not always a particular type of business system that has to send/receive messages with SAPXI; it can also be an application like ABAP or Java. To cater to these needs, SAP XI provides different ways to generate interfaces in ABAP and JAVA u2013 and these interfaces are known as proxies.
ABAP proxies are generated using the transaction SPROXY (in SAP Web AS 6.20 and above); for Java proxies, the Integration Builder tool is used.
Basicly client & server are just diffrent terminology for sender and reciever (client being the sender and server the reciever), proxies are basicly program that begin in one SAP system and continue running at nother SAP system (with control ultimatly return to the original system).
It's a good way to create your own application "envelope" to activate any code you want and that is both its strong point and weak point (maintanance and flexability).
ABAP proxy can be used with WAS version greater than 6.20
If u r wondering why we need ABAP proxy when we have a RFC..the reason is hat the overhead incurred is less in case of proxy and swift execution too.
There is a cliet proxy and a server proxy
The chief distinction betwen the two is :
Client proxy: Calls a webservice on the internet
Server Proxy : Provides an inbound interface as a webservice
ABAP proxy generation is part of the SAP Web AS 6.40. ABAP proxy generation enables you to generate proxies to communicate by using the Web service infrastructure and by using SAP Exchange Infrastructure. ABAP proxies that were generated from message interfaces in the Integration Repository (IR) can be used in both infrastructures. This means that if none of the Integration Server services are required for a proxy-to-proxy communication scenario in ABAP, you can use a point-to-point connection using the Web service infrastructure instead.
u2022 Java proxy generation in the Integration Builder (Design) generates proxies from message interfaces in the Integration Repository. Java proxy generation packs the proxy objects in a Jar file, which you can save locally. You use the generated classes in J2EE applications on the SAP J2EE Engine.
Advantages of Proxies:
Basically proxies are used for adapter less communication & main purpose of it is to bypass adapter engine.
Proxy generation enables you to create proxies in application systems. Proxies encapsulate the creation or parsing of XML messages and the communication with the relevant runtime components required to send or receive the messages. The proxy runtime controls these processes and can itself be controlled in application programs by means of additional methods.
Since the communication between the sender and receiver is decoupled, you can use proxies to exchange messages with various different communication parties, and also by using adapters. However, this section of the documentation only discusses the programming model for the proxy runtime.
We can generate proxies out of the message interface (inbound/outbound) defined in Integration repository.
Proxy generation converts non-language specific interface descriptions in WSDL into executable interfaces know as proxies. Proxies are executable interfaces in the application system.
There are two kinds of proxies:
1) Java proxies - generated in IR from WSDL description of interface u2013 results in .jar file containing generated java classes.
2) ABAP proxies - generated in application server with SPROXY transaction based on WSDL representation of message interface.
Note: For WAS release lower than 6.20 adapters are the only means to establish
connection. From WAS 6.20, proxy generation feature enables application systems to communicate with XI using proxies. Proxies enable adapter-less
communication (native connectivity).
You can get details about PrProxy : Proxy is a structure where there is no processing function module associated. You need to explicitly write the Business Logic/Call the subroutines .
Choosing of RFC adapter depends on the version of the system we r going to communicate.
Using RFC Adapter is the only option when we have SAP system with WAS 6.1 or older.
RFC Adapter may not be considered as the best option when we have WAS 6.2 onwards.
Proxys bypasses adapter engine & they communicate directly with IE .
Thru proxys
You can handle large amount of data
You can handle error messages
if you want to reduce the work load over XI server
then the best way is avoiding protocol conversion which adapters does(XYZ format to XML format)
if we use proxy which will be deployed on local proxy engine which in turn does protocol conversion instead of giving the job to XI.
i.e is (XYZ to XML format is done by proxy runtime and passed to XI at XI no conversion is done)
go thru this link :
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2162oxies [original link is broken] [original link is broken] [original link is broken] here..
.If you have a transfer the huge amount of data between two entities..you need to use Proxy..
ABAP proxies - generated in application server with SPROXY transaction based on WSDL representation of message interface
They are Client Proxy and Server proxy.
Client Proxy - When Java or R/3 is calling XI.
R/3 or Java -
> XI----
> Any Application
Server Proxy - When XI is calling Java or R/3
Any Application--> XI--
> R/3 or Java
Activating ABAP proxies:
/people/vijaya.kumari2/blog/2006/01/26/how-do-you-activate-abap-proxies
XSD Data Types vs. ABAP Data Types -- Quick Reference u2013 Part I
XSD Data Types vs. ABAP Data Types - Quick Reference u2013 Part II
Client Proxy - /people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy
Server Proxy - /people/siva.maranani/blog/2005/04/03/abap-server-proxies
ABAP CLIENT PROXY
/people/ravikumar.allampallam/blog/2005/03/14/abap-proxies-in-xiclient-proxy
ABAP SERVER PROXY
/people/siva.maranani/blog/2005/04/03/abap-server-proxies
cheers
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