Golang Info.Kind方法代码示例

func (s *storageResolver) nextHookOp(
	tag names.StorageTag,
	snap remotestate.StorageSnapshot,
	opFactory operation.Factory,
) (operation.Operation, error) {
	logger.Debugf("next hook op for %v: %+v", tag, snap)
	if !snap.Attached {
		return nil, resolver.ErrNoOperation
	}
	storageAttachment, ok := s.storage.storageAttachments[tag]
	if !ok {
		return nil, resolver.ErrNoOperation
	}
	switch snap.Life {
	case params.Alive:
		if storageAttachment.attached {
			// Storage attachments currently do not change
			// (apart from lifecycle) after being provisioned.
			// We don't process unprovisioned storage here,
			// so there's nothing to do.
			return nil, resolver.ErrNoOperation
		}
	case params.Dying:
		if !storageAttachment.attached {
			// Nothing to do: attachment is dying, but
			// the storage-attached hook has not been
			// consumed.
			return nil, resolver.ErrNoOperation
		}
	case params.Dead:
		// Storage must have been Dying to become Dead;
		// no further action is required.
		return nil, resolver.ErrNoOperation
	}

	hookInfo := hook.Info{
		StorageId: tag.Id(),
	}
	if snap.Life == params.Alive {
		hookInfo.Kind = hooks.StorageAttached
	} else {
		hookInfo.Kind = hooks.StorageDetaching
	}
	context := &contextStorage{
		tag:      tag,
		kind:     storage.StorageKind(snap.Kind),
		location: snap.Location,
	}
	storageAttachment.ContextStorageAttachment = context
	s.storage.storageAttachments[tag] = storageAttachment

	logger.Debugf("queued hook: %v", hookInfo)
	return opFactory.NewRunHook(hookInfo)
}

// Commit updates relation state to include the fact of the hook's execution,
// records the impact of start and collect-metrics hooks, and queues follow-up
// config-changed hooks to directly follow install and upgrade-charm hooks.
// Commit is part of the Operation interface.
func (rh *runHook) Commit(state State) (*State, error) {
	if err := rh.callbacks.CommitHook(rh.info); err != nil {
		return nil, err
	}

	change := stateChange{
		Kind: Continue,
		Step: Pending,
	}

	var hi *hook.Info = &hook.Info{Kind: hooks.ConfigChanged}
	switch rh.info.Kind {
	case hooks.ConfigChanged:
		if state.Started {
			break
		}
		hi.Kind = hooks.Start
		fallthrough
	case hooks.UpgradeCharm:
		change = stateChange{
			Kind: RunHook,
			Step: Queued,
			Hook: hi,
		}
	}

	newState := change.apply(state)

	switch rh.info.Kind {
	case hooks.Start:
		newState.Started = true
	case hooks.Stop:
		newState.Stopped = true
	case hooks.CollectMetrics:
		newState.CollectMetricsTime = time.Now().Unix()
	case hooks.UpdateStatus:
		newState.UpdateStatusTime = time.Now().Unix()
	}

	return newState, nil
}

func (s *storageResolver) nextHookOp(
	tag names.StorageTag,
	snap remotestate.StorageSnapshot,
	opFactory operation.Factory,
) (operation.Operation, error) {

	logger.Debugf("next hook op for %v: %+v", tag, snap)

	if snap.Life == params.Dead {
		// Storage must have been Dying to become Dead;
		// no further action is required.
		return nil, resolver.ErrNoOperation
	}

	hookInfo := hook.Info{StorageId: tag.Id()}
	switch snap.Life {
	case params.Alive:
		storageAttachment, ok := s.storage.storageAttachments[tag]
		if ok && storageAttachment.attached {
			// Once the storage is attached, we only care about
			// lifecycle state changes.
			return nil, resolver.ErrNoOperation
		}
		// The storage-attached hook has not been committed, so add the
		// storage to the pending set.
		s.storage.pending.Add(tag)
		if !snap.Attached {
			// The storage attachment has not been provisioned yet,
			// so just ignore it for now. We'll be notified again
			// when it has been provisioned.
			return nil, resolver.ErrNoOperation
		}
		// The storage is alive, but we haven't previously run the
		// "storage-attached" hook. Do so now.
		hookInfo.Kind = hooks.StorageAttached
	case params.Dying:
		storageAttachment, ok := s.storage.storageAttachments[tag]
		if !ok || !storageAttachment.attached {
			// Nothing to do: attachment is dying, but
			// the storage-attached hook has not been
			// issued.
			return nil, resolver.ErrNoOperation
		}
		// The storage is dying, but we haven't previously run the
		// "storage-detached" hook. Do so now.
		hookInfo.Kind = hooks.StorageDetaching
	}

	// Update the local state to reflect what we're about to report
	// to a hook.
	stateFile, err := readStateFile(s.storage.storageStateDir, tag)
	if err != nil {
		return nil, errors.Trace(err)
	}
	s.storage.storageAttachments[tag] = storageAttachment{
		stateFile, &contextStorage{
			tag:      tag,
			kind:     storage.StorageKind(snap.Kind),
			location: snap.Location,
		},
	}

	return opFactory.NewRunHook(hookInfo)
}

// deploy deploys the supplied charm URL, and sets follow-up hook operation state
// as indicated by reason.
func (u *Uniter) deploy(curl *corecharm.URL, reason Op) error {
	if reason != Install && reason != Upgrade {
		panic(fmt.Errorf("%q is not a deploy operation", reason))
	}
	var hi *hook.Info
	if u.s != nil && (u.s.Op == RunHook || u.s.Op == Upgrade) {
		// If this upgrade interrupts a RunHook, we need to preserve the hook
		// info so that we can return to the appropriate error state. However,
		// if we're resuming (or have force-interrupted) an Upgrade, we also
		// need to preserve whatever hook info was preserved when we initially
		// started upgrading, to ensure we still return to the correct state.
		hi = u.s.Hook
	}
	if u.s == nil || u.s.OpStep != Done {
		// Get the new charm bundle before announcing intention to use it.
		logger.Infof("fetching charm %q", curl)
		sch, err := u.st.Charm(curl)
		if err != nil {
			return err
		}
		if err = u.deployer.Stage(sch, u.tomb.Dying()); err != nil {
			return err
		}

		// Set the new charm URL - this returns when the operation is complete,
		// at which point we can refresh the local copy of the unit to get a
		// version with the correct charm URL, and can go ahead and deploy
		// the charm proper.
		if err := u.f.SetCharm(curl); err != nil {
			return err
		}
		if err := u.unit.Refresh(); err != nil {
			return err
		}
		logger.Infof("deploying charm %q", curl)
		if err = u.writeState(reason, Pending, hi, curl); err != nil {
			return err
		}
		if err = u.deployer.Deploy(); err != nil {
			return err
		}
		if err = u.writeState(reason, Done, hi, curl); err != nil {
			return err
		}
	}
	logger.Infof("charm %q is deployed", curl)
	status := Queued
	if hi != nil {
		// If a hook operation was interrupted, restore it.
		status = Pending
	} else {
		// Otherwise, queue the relevant post-deploy hook.
		hi = &hook.Info{}
		switch reason {
		case Install:
			hi.Kind = hooks.Install
		case Upgrade:
			hi.Kind = hooks.UpgradeCharm
		}
	}
	return u.writeState(RunHook, status, hi, nil)
}