Golang resource.Info类代码示例

// 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
}

// save invokes the API to alter an object. The reporter passed to this method is the same returned by
// the migration visitor method (for this type, transformImageReferences). It should return an error
// if the input type cannot be saved. It returns migrate.ErrRecalculate if migration should be re-run
// on the provided object.
func (o *MigrateImageReferenceOptions) save(info *resource.Info, reporter migrate.Reporter) error {
	switch t := info.Object.(type) {
	case *imageapi.ImageStream:
		// update status first so that a subsequent spec update won't pull incorrect values
		if reporter.(imageChangeInfo).status {
			updated, err := o.Client.ImageStreams(t.Namespace).UpdateStatus(t)
			if err != nil {
				return migrate.DefaultRetriable(info, err)
			}
			info.Refresh(updated, true)
			return migrate.ErrRecalculate
		}
		if reporter.(imageChangeInfo).spec {
			updated, err := o.Client.ImageStreams(t.Namespace).Update(t)
			if err != nil {
				return migrate.DefaultRetriable(info, err)
			}
			info.Refresh(updated, true)
		}
		return nil
	default:
		if _, err := resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, info.Object); err != nil {
			return migrate.DefaultRetriable(info, err)
		}
	}
	return nil
}

// createAndRefresh creates an object from input info and refreshes info with that object
func createAndRefresh(info *resource.Info) error {
	obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, info.Object)
	if err != nil {
		return err
	}
	info.Refresh(obj, true)
	return nil
}

func createAndRefresh(info *resource.Info) error {
	obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, info.Object)
	if err != nil {
		if errors.IsAlreadyExists(err) {
			glog.V(5).Infof("Object %s/%s already exists", info.Namespace, info.Name)
			return nil
		}
		return err
	}
	info.Refresh(obj, true)
	return nil
}

// CreateResource creates the given resource on openshift
// and returns an error, or nil if successful
//
// Usage: first parse the resource with Context.ParseResource
// and then use the visitor pattern on the parsed resource:
//   r.Visit(CreateResource)
func CreateResource(info *resource.Info) error {
	data, err := info.Mapping.Codec.Encode(info.Object)
	if err != nil {
		return err
	}

	obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, data)
	if err != nil {
		return err
	}

	info.Refresh(obj, 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
}

// save invokes the API to alter an object. The reporter passed to this method is the same returned by
// the migration visitor method (for this type, transformAPIStorage). It should return an error
// if the input type cannot be saved. It returns migrate.ErrRecalculate if migration should be re-run
// on the provided object.
func (o *MigrateAPIStorageOptions) save(info *resource.Info, reporter migrate.Reporter) error {
	switch info.Object.(type) {
	// TODO: add any custom mutations necessary
	default:
		// load the body and save it back, without transformation to avoid losing fields
		get := info.Client.Get().
			Resource(info.Mapping.Resource).
			NamespaceIfScoped(info.Namespace, info.Mapping.Scope.Name() == meta.RESTScopeNameNamespace).
			Name(info.Name).Do()
		data, err := get.Raw()
		if err != nil {
			return migrate.DefaultRetriable(info, err)
		}
		update := info.Client.Put().
			Resource(info.Mapping.Resource).
			NamespaceIfScoped(info.Namespace, info.Mapping.Scope.Name() == meta.RESTScopeNameNamespace).
			Name(info.Name).Body(data).
			Do()
		if err := update.Error(); err != nil {
			return migrate.DefaultRetriable(info, err)
		}

		if oldObject, err := get.Get(); err == nil {
			info.Refresh(oldObject, true)
			oldVersion := info.ResourceVersion
			if object, err := update.Get(); err == nil {
				info.Refresh(object, true)
				if info.ResourceVersion == oldVersion {
					return migrate.ErrUnchanged
				}
			} else {
				glog.V(4).Infof("unable to calculate resource version: %v", err)
			}
		} else {
			glog.V(4).Infof("unable to calculate resource version: %v", err)
		}
	}
	return nil
}