How to integrate the portal system with non-sap system

Hi Gurus,
How to integrate Portal system with non-SAP system?
I know few ways .......Using Usermapping UIDPW method.
Using Appintegrator .....and using Business repository objects in JCA?
Is there anyother way to integrate if so please give me the names and steps for integrating it?
Thanks in Advance,
Dharani

Hi Dharani,
You can get information from the following links:
http://help.sap.com/saphelp_nw04s/helpdata/en/43/d08b00d73001b4e10000000a11466f/frameset.htm
https://www.sdn.sap.com/irj/sdn/thread?threadID=744043
SAP CONNECTORS:- Basically Connectors are like middlewares , that we use to connect to the backend system including Non SAP systems also. Will try to explain it to u with some examples of SAP Connectors:-
a) SAP Business Connectors:-
A middleware application based on the B2B integration server from webMethods.
The SAP Business Connector enables both bi-directional synchronous communication and asynchronous communication between SAP applications and SAP and non-SAP applications.
The SAP Business Connector makes all SAP functions that are available via BAPIs or IDocs accessible to business partners over the Internet as an XML-based service.
The SAP Business Connector uses the Internet as a communication platform and XML or HTML as the data format. It integrates non-SAP products by using an open, non-proprietary technology.
b) SAP Java Connector:-
SAP Java Connector (SAP JCo) is a middleware component that enables the development of SAP-compatible components and applications in Java. SAP JCo supports communication with the SAP Server in both directions: inbound calls (Java calls ABAP) and outbound calls (ABAP calls Java).
SAP JCo can be implemented with Desktop applications and with Web server applications.
SAP JCo is used as an integrated component in the following applications:
1) SAP Business Connector, for communication with external Java applications
2) SAP Web Application Server, for connecting the integrated J2EE server with the ABAP environment.
SAP JCo can also be implemented as a standalone component, for example to establish communication with the SAP system for individual online (web) applications.
To Know more go through,
SAP Java Connectors
II) ALE Concept:-
ALE is not restricted to communication between SAP systems, it can also be used for connecting SAP Systems to non-SAP systems.
By using IDocs as universal information containers, ALE can reduce the number of different application interfaces to one single interface that can either send IDocs from an SAP system or receive IDocs in an SAP system.
SAP certified Translator Programs can convert IDoc structures into customer-defined structures.
Alternatively, the RFC interface for sending and receiving IDocs can be used in non-SAP systems.
In both cases you need the RFC Library of the RFC Software Development Kit (RFC-SDK).
This link gives a great insight into landscape for Connectivity to Non-SAP systems:-
SAP to Non-SAP systems
III) Communication Between SAP Systems and External (Non-SAP) Systems using RFC:-
When you use RFC for communication with an external (non-SAP) system, you can also implement the SAP Java Connector or the SAP .Net Connector for the conversion of data. However, there are no specific security requirements for these components, since they only perform internal system conversion functions.
The additional security recommendations for communication with external systems in this section make particular reference to cases where an external system is used as a server (SAP calls the external system). If you use an external system as a client (the external system calls SAP), the appropriate SAP-specific security mechanisms are implemented on the SAP side.
This link explains in detail all the security considerations you need to take for connecting to an External Non SAP system like, User administration, Network Security etc.
Communication Between SAP Systems and External (Non-SAP) Systems using RFC
Hope this helps,
Regards,
Rudradev Devulapalli
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