cmd/juju: working bootstrap and destroy commands

state/service.go

 // launchpad.net/juju/state
 //
 // Copyright (c) 2011-2012 Canonical Ltd.
 
 package state
 
 import (
         "errors"
         "fmt"
         "launchpad.net/goyaml"
@@ skipping 218 matching lines @@
                 return err
         }
         return nil
 }
 
 // Config returns the configuration node for the service.
 func (s *Service) Config() (*ConfigNode, error) {
         return readConfigNode(s.st.zk, s.zkConfigPath())
 }
 
+// WatchConfig creates a watcher for the configuration node
+// of the service.
+func (s *Service) WatchConfig() *ConfigWatcher {
+        return newConfigWatcher(s.st, s.zkConfigPath())
+}
+
 // zkKey returns ZooKeeper key of the service.
 func (s *Service) zkKey() string {
         return s.key
 }
 
 // zkPath returns the ZooKeeper base path for the service.
 func (s *Service) zkPath() string {
         return fmt.Sprintf("/services/%s", s.key)
 }
 
 // zkConfigPath returns the ZooKeeper path for the service configuration.
 func (s *Service) zkConfigPath() string {
         return fmt.Sprintf("/services/%s/config", s.key)
 }
 
 // zkExposedPath, if exists in ZooKeeper, indicates, that a
 // service is exposed.
 func (s *Service) zkExposedPath() string {
         return fmt.Sprintf("/services/%s/exposed", s.key)
 }