473 lines
10 KiB
Go
473 lines
10 KiB
Go
package bolt
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import (
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"bytes"
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"context"
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"encoding/json"
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bolt "github.com/coreos/bbolt"
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influxdb "github.com/influxdata/influxdb"
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)
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var (
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labelBucket = []byte("labelsv1")
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labelMappingBucket = []byte("labelmappingsv1")
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)
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func (c *Client) initializeLabels(ctx context.Context, tx *bolt.Tx) error {
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if _, err := tx.CreateBucketIfNotExists([]byte(labelBucket)); err != nil {
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return err
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}
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if _, err := tx.CreateBucketIfNotExists([]byte(labelMappingBucket)); err != nil {
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return err
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}
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return nil
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}
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// FindLabelByID finds a label by its ID
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func (c *Client) FindLabelByID(ctx context.Context, id influxdb.ID) (*influxdb.Label, error) {
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var l *influxdb.Label
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err := c.db.View(func(tx *bolt.Tx) error {
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label, pe := c.findLabelByID(ctx, tx, id)
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if pe != nil {
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return pe
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}
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l = label
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return nil
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})
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if err != nil {
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return nil, &influxdb.Error{
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Op: getOp(influxdb.OpFindLabelByID),
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Err: err,
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}
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}
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return l, nil
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}
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func (c *Client) findLabelByID(ctx context.Context, tx *bolt.Tx, id influxdb.ID) (*influxdb.Label, *influxdb.Error) {
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encodedID, err := id.Encode()
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if err != nil {
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return nil, &influxdb.Error{
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Err: err,
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}
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}
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var l influxdb.Label
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v := tx.Bucket(labelBucket).Get(encodedID)
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if len(v) == 0 {
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return nil, &influxdb.Error{
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Code: influxdb.ENotFound,
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Msg: influxdb.ErrLabelNotFound,
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}
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}
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if err := json.Unmarshal(v, &l); err != nil {
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return nil, &influxdb.Error{
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Err: err,
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}
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}
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return &l, nil
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}
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func filterLabelsFn(filter influxdb.LabelFilter) func(l *influxdb.Label) bool {
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return func(label *influxdb.Label) bool {
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return (filter.Name == "" || (filter.Name == label.Name))
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}
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}
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// FindLabels returns a list of labels that match a filter.
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func (c *Client) FindLabels(ctx context.Context, filter influxdb.LabelFilter, opt ...influxdb.FindOptions) ([]*influxdb.Label, error) {
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ls := []*influxdb.Label{}
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err := c.db.View(func(tx *bolt.Tx) error {
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labels, err := c.findLabels(ctx, tx, filter)
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if err != nil {
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return err
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}
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ls = labels
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return nil
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})
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if err != nil {
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return nil, err
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}
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return ls, nil
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}
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func (c *Client) findLabels(ctx context.Context, tx *bolt.Tx, filter influxdb.LabelFilter) ([]*influxdb.Label, error) {
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ls := []*influxdb.Label{}
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filterFn := filterLabelsFn(filter)
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err := c.forEachLabel(ctx, tx, func(l *influxdb.Label) bool {
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if filterFn(l) {
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ls = append(ls, l)
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}
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return true
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})
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if err != nil {
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return nil, err
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}
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return ls, nil
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}
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// func filterMappingsFn(filter influxdb.LabelMappingFilter) func(m *influxdb.LabelMapping) bool {
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// return func(mapping *influxdb.LabelMapping) bool {
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// return (filter.ResourceID.String() == mapping.ResourceID.String()) &&
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// (filter.LabelID == nil || filter.LabelID == mapping.LabelID)
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// }
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// }
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func decodeLabelMappingKey(key []byte) (resourceID influxdb.ID, labelID influxdb.ID, err error) {
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if len(key) != 2*influxdb.IDLength {
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return 0, 0, &influxdb.Error{Code: influxdb.EInvalid, Msg: "malformed label mapping key (please report this error)"}
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}
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if err := (&resourceID).Decode(key[:influxdb.IDLength]); err != nil {
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return 0, 0, &influxdb.Error{Code: influxdb.EInvalid, Msg: "bad resource id", Err: influxdb.ErrInvalidID}
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}
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if err := (&labelID).Decode(key[influxdb.IDLength:]); err != nil {
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return 0, 0, &influxdb.Error{Code: influxdb.EInvalid, Msg: "bad label id", Err: influxdb.ErrInvalidID}
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}
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return resourceID, labelID, nil
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}
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func (c *Client) FindResourceLabels(ctx context.Context, filter influxdb.LabelMappingFilter) ([]*influxdb.Label, error) {
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if !filter.ResourceID.Valid() {
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return nil, &influxdb.Error{Code: influxdb.EInvalid, Msg: "filter requires a valid resource id", Err: influxdb.ErrInvalidID}
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}
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ls := []*influxdb.Label{}
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err := c.db.View(func(tx *bolt.Tx) error {
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cur := tx.Bucket(labelMappingBucket).Cursor()
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prefix, err := filter.ResourceID.Encode()
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if err != nil {
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return err
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}
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for k, _ := cur.Seek(prefix); bytes.HasPrefix(k, prefix); k, _ = cur.Next() {
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_, id, err := decodeLabelMappingKey(k)
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if err != nil {
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return err
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}
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l, err := c.findLabelByID(ctx, tx, id)
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if l == nil && err != nil {
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// TODO(jm): return error instead of continuing once orphaned mappings are fixed
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// (see https://github.com/influxdata/influxdb/issues/11278)
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continue
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}
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ls = append(ls, l)
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}
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return nil
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})
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if err != nil {
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return nil, &influxdb.Error{
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Err: err,
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Op: getOp(influxdb.OpFindLabelMapping),
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}
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}
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return ls, nil
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}
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// CreateLabelMapping creates a new mapping between a resource and a label.
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func (c *Client) CreateLabelMapping(ctx context.Context, m *influxdb.LabelMapping) error {
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_, err := c.FindLabelByID(ctx, m.LabelID)
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if err != nil {
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return &influxdb.Error{
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Err: err,
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Op: getOp(influxdb.OpCreateLabel),
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}
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}
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err = c.db.Update(func(tx *bolt.Tx) error {
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return c.putLabelMapping(ctx, tx, m)
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})
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if err != nil {
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return &influxdb.Error{
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Err: err,
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Op: getOp(influxdb.OpCreateLabel),
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}
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}
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return nil
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}
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// DeleteLabelMapping deletes a label mapping.
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func (c *Client) DeleteLabelMapping(ctx context.Context, m *influxdb.LabelMapping) error {
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err := c.db.Update(func(tx *bolt.Tx) error {
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return c.deleteLabelMapping(ctx, tx, m)
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})
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if err != nil {
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return &influxdb.Error{
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Op: getOp(influxdb.OpDeleteLabelMapping),
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Err: err,
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}
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}
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return nil
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}
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func (c *Client) deleteLabelMapping(ctx context.Context, tx *bolt.Tx, m *influxdb.LabelMapping) error {
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key, err := labelMappingKey(m)
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if err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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if err := tx.Bucket(labelMappingBucket).Delete(key); err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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return nil
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}
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// CreateLabel creates a new label.
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func (c *Client) CreateLabel(ctx context.Context, l *influxdb.Label) error {
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err := c.db.Update(func(tx *bolt.Tx) error {
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l.ID = c.IDGenerator.ID()
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return c.putLabel(ctx, tx, l)
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})
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if err != nil {
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return &influxdb.Error{
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Err: err,
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Op: getOp(influxdb.OpCreateLabel),
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}
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}
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return nil
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}
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// PutLabel creates a label from the provided struct, without generating a new ID.
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func (c *Client) PutLabel(ctx context.Context, l *influxdb.Label) error {
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return c.db.Update(func(tx *bolt.Tx) error {
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var err error
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pe := c.putLabel(ctx, tx, l)
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if pe != nil {
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err = pe
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}
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return err
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})
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}
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func labelMappingKey(m *influxdb.LabelMapping) ([]byte, error) {
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lid, err := m.LabelID.Encode()
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if err != nil {
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return nil, &influxdb.Error{
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Code: influxdb.EInvalid,
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Err: err,
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}
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}
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rid, err := m.ResourceID.Encode()
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if err != nil {
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return nil, &influxdb.Error{
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Code: influxdb.EInvalid,
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Err: err,
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}
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}
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key := make([]byte, len(rid)+len(lid))
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copy(key, rid)
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copy(key[len(rid):], lid)
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return key, nil
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}
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func (c *Client) forEachLabel(ctx context.Context, tx *bolt.Tx, fn func(*influxdb.Label) bool) error {
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cur := tx.Bucket(labelBucket).Cursor()
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for k, v := cur.First(); k != nil; k, v = cur.Next() {
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l := &influxdb.Label{}
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if err := json.Unmarshal(v, l); err != nil {
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return err
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}
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if !fn(l) {
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break
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}
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}
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return nil
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}
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// UpdateLabel updates a label.
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func (c *Client) UpdateLabel(ctx context.Context, id influxdb.ID, upd influxdb.LabelUpdate) (*influxdb.Label, error) {
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var label *influxdb.Label
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err := c.db.Update(func(tx *bolt.Tx) error {
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labelResponse, pe := c.updateLabel(ctx, tx, id, upd)
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if pe != nil {
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return &influxdb.Error{
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Err: pe,
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Op: getOp(influxdb.OpUpdateLabel),
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}
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}
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label = labelResponse
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return nil
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})
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return label, err
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}
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func (c *Client) updateLabel(ctx context.Context, tx *bolt.Tx, id influxdb.ID, upd influxdb.LabelUpdate) (*influxdb.Label, error) {
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label, err := c.findLabelByID(ctx, tx, id)
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if err != nil {
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return nil, err
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}
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if label.Properties == nil {
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label.Properties = make(map[string]string)
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}
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for k, v := range upd.Properties {
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if v == "" {
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delete(label.Properties, k)
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} else {
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label.Properties[k] = v
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}
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}
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if upd.Name != "" {
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label.Name = upd.Name
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}
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if err := label.Validate(); err != nil {
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return nil, &influxdb.Error{
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Code: influxdb.EInvalid,
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Err: err,
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}
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}
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if err := c.putLabel(ctx, tx, label); err != nil {
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return nil, &influxdb.Error{
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Err: err,
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}
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}
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return label, nil
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}
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// set a label and overwrite any existing label
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func (c *Client) putLabel(ctx context.Context, tx *bolt.Tx, l *influxdb.Label) error {
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v, err := json.Marshal(l)
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if err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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encodedID, err := l.ID.Encode()
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if err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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if err := tx.Bucket(labelBucket).Put(encodedID, v); err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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return nil
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}
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// PutLabelMapping writes a label mapping to boltdb
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func (c *Client) PutLabelMapping(ctx context.Context, m *influxdb.LabelMapping) error {
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return c.db.Update(func(tx *bolt.Tx) error {
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var err error
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pe := c.putLabelMapping(ctx, tx, m)
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if pe != nil {
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err = pe
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}
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return err
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})
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}
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func (c *Client) putLabelMapping(ctx context.Context, tx *bolt.Tx, m *influxdb.LabelMapping) error {
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v, err := json.Marshal(m)
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if err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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key, err := labelMappingKey(m)
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if err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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if err := tx.Bucket(labelMappingBucket).Put(key, v); err != nil {
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return &influxdb.Error{
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Err: err,
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}
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}
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return nil
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}
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// DeleteLabel deletes a label.
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func (c *Client) DeleteLabel(ctx context.Context, id influxdb.ID) error {
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err := c.db.Update(func(tx *bolt.Tx) error {
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return c.deleteLabel(ctx, tx, id)
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})
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if err != nil {
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return &influxdb.Error{
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Op: getOp(influxdb.OpDeleteLabel),
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Err: err,
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}
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}
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return nil
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}
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func (c *Client) deleteLabel(ctx context.Context, tx *bolt.Tx, id influxdb.ID) error {
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_, err := c.findLabelByID(ctx, tx, id)
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if err != nil {
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return err
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}
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encodedID, idErr := id.Encode()
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if idErr != nil {
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return &influxdb.Error{
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Err: idErr,
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}
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}
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return tx.Bucket(labelBucket).Delete(encodedID)
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}
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// func (c *Client) deleteLabels(ctx context.Context, tx *bolt.Tx, filter influxdb.LabelFilter) error {
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// ls, err := c.findLabels(ctx, tx, filter)
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// if err != nil {
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// return err
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// }
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// for _, l := range ls {
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// encodedID, idErr := l.ID.Encode()
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// if idErr != nil {
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// return &influxdb.Error{
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// Err: idErr,
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// }
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// }
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//
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// if err = tx.Bucket(labelBucket).Delete(encodedID); err != nil {
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// return err
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// }
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// }
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// return nil
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// }
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