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  • Praveen Kumar thinks this is interesting:

Let us consider a sample scenario. Application A is only capable of exporting files to a particular directory and application B would like to get some information out of an exported file in a SOAP message over HTTP. The ESB can implement a message flow that is triggered by a SOAP request message from application B and read the requested information of the exported file of application A with a file adapter.

From

Cover of Architectural Patterns

Note

Example for ESB usage