// processChange takes the backend change notification emitted by the backend and applies it to the server
func processChange(p proxy.Proxy, ch interface{}) error {
switch change := ch.(type) {
case *engine.HostUpserted:
return p.UpsertHost(change.Host)
case *engine.HostDeleted:
return p.DeleteHost(change.HostKey)
case *engine.ListenerUpserted:
return p.UpsertListener(change.Listener)
case *engine.ListenerDeleted:
return p.DeleteListener(change.ListenerKey)
case *engine.FrontendUpserted:
return p.UpsertFrontend(change.Frontend)
case *engine.FrontendDeleted:
return p.DeleteFrontend(change.FrontendKey)
case *engine.MiddlewareUpserted:
return p.UpsertMiddleware(change.FrontendKey, change.Middleware)
case *engine.MiddlewareDeleted:
return p.DeleteMiddleware(change.MiddlewareKey)
case *engine.BackendUpserted:
return p.UpsertBackend(change.Backend)
case *engine.BackendDeleted:
return p.DeleteBackend(change.BackendKey)
case *engine.ServerUpserted:
return p.UpsertServer(change.BackendKey, change.Server)
case *engine.ServerDeleted:
return p.DeleteServer(change.ServerKey)
}
return fmt.Errorf("unsupported change: %#v", ch)
}
