Example #1
0
// WatchForEnvironConfigChanges return a NotifyWatcher waiting for the
// environment configuration to change.
func (e *EnvironWatcher) WatchForEnvironConfigChanges() (watcher.NotifyWatcher, error) {
	var result params.NotifyWatchResult
	err := e.caller.Call(e.facadeName, "", "WatchForEnvironConfigChanges", nil, &result)
	if err != nil {
		return nil, err
	}
	return watcher.NewNotifyWatcher(e.caller, result), nil
}
Example #2
0
// WatchAPIHostPorts watches the host/port addresses of the API servers.
func (a *APIAddresser) WatchAPIHostPorts() (watcher.NotifyWatcher, error) {
	var result params.NotifyWatchResult
	err := a.caller.Call(a.facadeName, "", "WatchAPIHostPorts", nil, &result)
	if err != nil {
		return nil, err
	}
	return watcher.NewNotifyWatcher(a.caller, result), nil
}
Example #3
0
func (st *State) WatchMachineErrorRetry() (watcher.NotifyWatcher, error) {
	var result params.NotifyWatchResult
	err := st.call("WatchMachineErrorRetry", nil, &result)
	if err != nil {
		return nil, err
	}
	if err := result.Error; err != nil {
		return nil, result.Error
	}
	w := watcher.NewNotifyWatcher(st.caller, result)
	return w, nil
}
Example #4
0
func (s *watcherSuite) TestWatchMachine(c *gc.C) {
	var results params.NotifyWatchResults
	args := params.Entities{Entities: []params.Entity{{Tag: s.rawMachine.Tag()}}}
	err := s.stateAPI.Call("Machiner", "", "Watch", args, &results)
	c.Assert(err, gc.IsNil)
	c.Assert(results.Results, gc.HasLen, 1)
	result := results.Results[0]
	c.Assert(result.Error, gc.IsNil)

	// params.NotifyWatcher conforms to the state.NotifyWatcher interface
	w := watcher.NewNotifyWatcher(s.stateAPI, result)
	wc := statetesting.NewNotifyWatcherC(c, s.State, w)
	wc.AssertOneChange()
	statetesting.AssertStop(c, w)
	wc.AssertClosed()
}
Example #5
0
func (s *watcherSuite) TestNotifyWatcherStopsWithPendingSend(c *gc.C) {
	var results params.NotifyWatchResults
	args := params.Entities{Entities: []params.Entity{{Tag: s.rawMachine.Tag()}}}
	err := s.stateAPI.Call("Machiner", "", "Watch", args, &results)
	c.Assert(err, gc.IsNil)
	c.Assert(results.Results, gc.HasLen, 1)
	result := results.Results[0]
	c.Assert(result.Error, gc.IsNil)

	// params.NotifyWatcher conforms to the state.NotifyWatcher interface
	w := watcher.NewNotifyWatcher(s.stateAPI, result)
	wc := statetesting.NewNotifyWatcherC(c, s.State, w)

	// Now, without reading any changes try stopping the watcher.
	statetesting.AssertCanStopWhenSending(c, w)
	wc.AssertClosed()
}
Example #6
0
// Watch returns a watcher for observing changes to the unit.
func (u *Unit) Watch() (watcher.NotifyWatcher, error) {
	var results params.NotifyWatchResults
	args := params.Entities{
		Entities: []params.Entity{{Tag: u.tag}},
	}
	err := u.st.call("Watch", args, &results)
	if err != nil {
		return nil, err
	}
	if len(results.Results) != 1 {
		return nil, fmt.Errorf("expected 1 result, got %d", len(results.Results))
	}
	result := results.Results[0]
	if result.Error != nil {
		return nil, result.Error
	}
	w := watcher.NewNotifyWatcher(u.st.caller, result)
	return w, nil
}
Example #7
0
func (st *State) WatchAPIVersion(agentTag string) (watcher.NotifyWatcher, error) {
	var results params.NotifyWatchResults
	args := params.Entities{
		Entities: []params.Entity{{Tag: agentTag}},
	}
	err := st.call("WatchAPIVersion", args, &results)
	if err != nil {
		// TODO: Not directly tested
		return nil, err
	}
	if len(results.Results) != 1 {
		// TODO: Not directly tested
		return nil, fmt.Errorf("expected 1 result, got %d", len(results.Results))
	}
	result := results.Results[0]
	if result.Error != nil {
		//  TODO: Not directly tested
		return nil, result.Error
	}
	w := watcher.NewNotifyWatcher(st.caller, result)
	return w, nil
}