Hi Wenxing
If the different XML messages have different root element name, then you can consider designing all of them as multiple operations under 1 service interface. This way you just need to have one URL. On PI side when an XML message is received via the HTTP_AAE sender adapter, during receiver determination it will check the XML message root name against the service interface to determine which mapping to execute - it is all automatic.
Refer to my reply in the following thread. The scenario is slightly different (different system calling single URL) but the idea of a single endpoint is still valid.
Re: Multiple WS Receivers for synchronous request
Rgds
Eng Swee