HPCC-20149 adds the ability to have Dynamic ESDL proxy some of the ESDL service methods to another ESP instance elsewhere.  This is primarily intended to allow us to slowly migrate the implementations of a given service one by one to a local Dynamic ESDL implementation while proxiing through the ones that have not yet been migrated.

From the users perspective setting up the proxy is a fairly simple configuration in the dynamic configuration associated with the desdl service.

Under the Methods tag where before there were only children tags of type Method tags of type Proxy are also now supported.

<Methods>

  <Method name="myMethod" url="http://10.45.22.1:292/somepath"/>

  <Method name="myMethod2" url="http://10.45.22.1:292/somepath"/>

  <Proxy method="myMethod3" address="http://10.45.22.1:292" />

  <Proxy method="myWild*" address="http://10.45.22.1:292" />

 </Methods>