forked from influxdata/influxdb
/
store.go
214 lines (175 loc) · 4.97 KB
/
store.go
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package storage
import (
"context"
"errors"
"math"
"sort"
"time"
"github.com/gogo/protobuf/proto"
"github.com/gogo/protobuf/types"
"github.com/influxdata/influxdb/models"
"github.com/influxdata/influxdb/services/meta"
"github.com/influxdata/influxdb/tsdb"
"github.com/influxdata/platform/query/functions/inputs/storage"
"github.com/influxdata/platform/storage/reads"
"github.com/influxdata/platform/storage/reads/datatypes"
"go.uber.org/zap"
)
var (
ErrMissingReadSource = errors.New("missing ReadSource")
)
func getReadSource(req *datatypes.ReadRequest) (*ReadSource, error) {
if req.ReadSource == nil {
return nil, ErrMissingReadSource
}
var source ReadSource
if err := types.UnmarshalAny(req.ReadSource, &source); err != nil {
return nil, err
}
return &source, nil
}
type MetaClient interface {
Database(name string) *meta.DatabaseInfo
ShardGroupsByTimeRange(database, policy string, min, max time.Time) (a []meta.ShardGroupInfo, err error)
}
type Store struct {
TSDBStore *tsdb.Store
MetaClient MetaClient
Logger *zap.Logger
}
func NewStore(store *tsdb.Store, metaClient MetaClient) *Store {
return &Store{
TSDBStore: store,
MetaClient: metaClient,
Logger: zap.NewNop(),
}
}
// WithLogger sets the logger for the service.
func (s *Store) WithLogger(log *zap.Logger) {
s.Logger = log.With(zap.String("service", "store"))
}
func (s *Store) findShardIDs(database, rp string, desc bool, start, end int64) ([]uint64, error) {
groups, err := s.MetaClient.ShardGroupsByTimeRange(database, rp, time.Unix(0, start), time.Unix(0, end))
if err != nil {
return nil, err
}
if len(groups) == 0 {
return nil, nil
}
if desc {
sort.Sort(sort.Reverse(meta.ShardGroupInfos(groups)))
} else {
sort.Sort(meta.ShardGroupInfos(groups))
}
shardIDs := make([]uint64, 0, len(groups[0].Shards)*len(groups))
for _, g := range groups {
for _, si := range g.Shards {
shardIDs = append(shardIDs, si.ID)
}
}
return shardIDs, nil
}
func (s *Store) validateArgs(database, rp string, start, end int64) (string, string, int64, int64, error) {
di := s.MetaClient.Database(database)
if di == nil {
return "", "", 0, 0, errors.New("no database")
}
if rp == "" {
rp = di.DefaultRetentionPolicy
}
rpi := di.RetentionPolicy(rp)
if rpi == nil {
return "", "", 0, 0, errors.New("invalid retention policy")
}
if start <= 0 {
start = models.MinNanoTime
}
if end <= 0 {
end = models.MaxNanoTime
}
return database, rp, start, end, nil
}
func (s *Store) Read(ctx context.Context, req *datatypes.ReadRequest) (reads.ResultSet, error) {
if len(req.GroupKeys) > 0 {
panic("Read: len(Grouping) > 0")
}
if req.Hints.NoPoints() {
req.PointsLimit = -1
}
if req.PointsLimit == 0 {
req.PointsLimit = math.MaxInt64
}
source, err := getReadSource(req)
if err != nil {
return nil, err
}
database, rp, start, end, err := s.validateArgs(source.Database, source.RetentionPolicy, req.TimestampRange.Start, req.TimestampRange.End)
if err != nil {
return nil, err
}
shardIDs, err := s.findShardIDs(database, rp, req.Descending, start, end)
if err != nil {
return nil, err
}
if len(shardIDs) == 0 { // TODO(jeff): this was a typed nil
return nil, nil
}
var cur reads.SeriesCursor
if ic, err := newIndexSeriesCursor(ctx, req.Predicate, s.TSDBStore.Shards(shardIDs)); err != nil {
return nil, err
} else if ic == nil { // TODO(jeff): this was a typed nil
return nil, nil
} else {
cur = ic
}
if req.SeriesLimit > 0 || req.SeriesOffset > 0 {
cur = reads.NewLimitSeriesCursor(ctx, cur, req.SeriesLimit, req.SeriesOffset)
}
req.TimestampRange.Start = start
req.TimestampRange.End = end
return reads.NewResultSet(ctx, req, cur), nil
}
func (s *Store) GroupRead(ctx context.Context, req *datatypes.ReadRequest) (reads.GroupResultSet, error) {
if req.SeriesLimit > 0 || req.SeriesOffset > 0 {
return nil, errors.New("GroupRead: SeriesLimit and SeriesOffset not supported when Grouping")
}
if req.Hints.NoPoints() {
req.PointsLimit = -1
}
if req.PointsLimit == 0 {
req.PointsLimit = math.MaxInt64
}
source, err := getReadSource(req)
if err != nil {
return nil, err
}
database, rp, start, end, err := s.validateArgs(source.Database, source.RetentionPolicy, req.TimestampRange.Start, req.TimestampRange.End)
if err != nil {
return nil, err
}
shardIDs, err := s.findShardIDs(database, rp, req.Descending, start, end)
if err != nil {
return nil, err
}
if len(shardIDs) == 0 {
return nil, nil
}
shards := s.TSDBStore.Shards(shardIDs)
req.TimestampRange.Start = start
req.TimestampRange.End = end
newCursor := func() (reads.SeriesCursor, error) {
cur, err := newIndexSeriesCursor(ctx, req.Predicate, shards)
if cur == nil || err != nil {
return nil, err
}
return cur, nil
}
rs := reads.NewGroupResultSet(ctx, req, newCursor)
if rs == nil {
return nil, nil
}
return rs, nil
}
func (s *Store) GetSource(rs storage.ReadSpec) (proto.Message, error) {
return &ReadSource{Database: rs.Database, RetentionPolicy: rs.RetentionPolicy}, nil
}