Golang Info.Get方法代码示例

// applyPatch reads the latest version of the object, writes it to version, then attempts to merge
// the changes onto it without conflict. If a conflict occurs jsonmerge.IsConflicting(err) is
// true. The info object is mutated
func applyPatch(delta *jsonmerge.Delta, info *resource.Info, version string) error {
	if err := info.Get(); err != nil {
		return patchError{err}
	}
	obj, err := resource.AsVersionedObject([]*resource.Info{info}, false, version)
	if err != nil {
		return patchError{err}
	}
	data, err := info.Mapping.Codec.Encode(obj)
	if err != nil {
		return patchError{err}
	}
	merged, err := delta.Apply(data)
	if err != nil {
		return patchError{err}
	}
	mergedObj, err := info.Mapping.Codec.Decode(merged)
	if err != nil {
		return patchError{err}
	}
	updated, err := resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, mergedObj)
	if err != nil {
		return err
	}
	info.Refresh(updated, true)
	return nil
}

// waitForObjectDeletion refreshes the object, waiting until it is deleted, a timeout is reached, or
// an error is encountered. It checks once a second.
func waitForObjectDeletion(info *resource.Info, timeout time.Duration) error {
	copied := *info
	info = &copied
	// TODO: refactor Reaper so that we can pass the "wait" option into it, and then check for UID change.
	return wait.PollImmediate(objectDeletionWaitInterval, timeout, func() (bool, error) {
		switch err := info.Get(); {
		case err == nil:
			return false, nil
		case errors.IsNotFound(err):
			return true, nil
		default:
			return false, err
		}
	})
}

// DefaultRetriable adds retry information to the provided error, and will refresh the
// info if the client info is stale. If the refresh fails the error is made fatal.
// All other errors are left in their natural state - they will not be retried unless
// they define a Temporary() method that returns true.
func DefaultRetriable(info *resource.Info, err error) error {
	if err == nil {
		return nil
	}
	switch {
	case errors.IsMethodNotSupported(err):
		return ErrNotRetriable{err}
	case errors.IsConflict(err):
		if refreshErr := info.Get(); refreshErr != nil {
			return ErrNotRetriable{err}
		}
		return ErrRetriable{err}
	case errors.IsServerTimeout(err):
		return ErrRetriable{err}
	}
	return err
}