Example of using vijava API from clojure to list all hostnames/IPs for those VMs that VMware knows the IP of

hosts.clj

; Return a list of vectors of hostname/ip address for VMware virtual machines from vCenter
; Export the environment variables:
; VI_USERNAME - your vCenter username
; VI_PASSWORD - your vCenter password
; VI_SERVER   - the vCenter hostname/IP
; Invoke with the command line:
; java -cp clojure-1.2.0/clojure.jar:vijava2120100715.jar:dom4j-1.6.1.jar clojure.main hosts.clj
(import '(com.vmware.vim25.mo ServiceInstance InventoryNavigator))

(def si (ServiceInstance.
     (java.net.URL. (str "https://" (System/getenv "VI_SERVER") "/sdk"))
     (System/getenv "VI_USERNAME")
     (System/getenv "VI_PASSWORD")
     true
))

(defn get-ips [vms]
  "Return sequence of vectors of VM [ hostname IP ]"
  (letfn 
    [(get-ip [vm] (.. vm getGuest ipAddress))
     (get-name [vm] (.. vm getName))
     (get-data [vm] (vector (get-name vm) (get-ip vm)))]
    (map get-data (filter get-ip vms))))

(let [inv (new InventoryNavigator (. si getRootFolder))
      vms (. inv searchManagedEntities "VirtualMachine")]
  (get-ips vms))