Hi sageon,
ESA (now called Enterprise SOA) is SAP view on the SOA concept. There is an extensive section here in SDN on the topic. ESA is the style or a methodology to build applications which reflects SAP's 30 years of experience and latest IT advancements such as webservices. ESA helps you in building Flexible applications which can adopt the changes whenever occured in the market. ESA is SAP's new vision and we can realize this using Netweaver.
SOA is not about what technology you are using to connect. Its about whether your business processes have been exposed as services for other applications / processes to access. You can use XI as well to access these services.
For more information:
In simple terms, ESA envisages exposing some of the processes (for example, creation of a Sales Order) as services, and since the web is one of the commonly used media, Web Services will be the preferred service 'type'.
These processes can be from a single SAP component (as is the case in the example that I have given) or can derive from one or more components. Just to take another example, if a customer or an ISV wants to create their own compensation-related processes based on what’s available in SAP HR and FI, then ESA, through the NetWeaver platform, will enable them to cull data/processes (which will be available as services) from HR & FI, so that they can put together the custom processes (this is foundation for xApps). So if multiple components/systems are involved, XI may have a role to play (but may not be a necessity).
Please let me know if you hve any queries...!
Thanks and Regards,
Chandu.
Message was edited by:
Chandu
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