Sounds like you just need JDE to invoke a service on IS, whenever it deems appropriate.
I’m not familiar with JDE in depth, but can you set it up to do an HTTP post? If so, have JDE invoke the service that you were scheduling. If you want control to return to JDE before the service is finished, write a wrapper service that kicks off the real service in a thread and returns immediately to JDE.
#Integration-Server-and-ESB#Adapters-and-E-Standards#webMethods