296 lines
10 KiB
Go
296 lines
10 KiB
Go
package cluster_test
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import (
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"bytes"
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"errors"
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"io"
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"os"
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"reflect"
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"testing"
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"time"
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"github.com/davecgh/go-spew/spew"
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"github.com/influxdata/influxdb"
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"github.com/influxdata/influxdb/cluster"
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"github.com/influxdata/influxdb/influxql"
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"github.com/influxdata/influxdb/models"
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"github.com/influxdata/influxdb/services/meta"
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)
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const (
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// DefaultDatabase is the default database name used in tests.
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DefaultDatabase = "db0"
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// DefaultRetentionPolicy is the default retention policy name used in tests.
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DefaultRetentionPolicy = "rp0"
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)
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// Ensure query executor can execute a simple SELECT statement.
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func TestQueryExecutor_ExecuteQuery_SelectStatement(t *testing.T) {
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e := DefaultQueryExecutor()
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// The meta client should return a single shard owned by the local node.
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e.MetaClient.ShardsByTimeRangeFn = func(sources influxql.Sources, tmin, tmax time.Time) (a []meta.ShardInfo, err error) {
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return []meta.ShardInfo{{ID: 100, Owners: []meta.ShardOwner{{NodeID: 0}}}}, nil
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}
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// The TSDB store should return an IteratorCreator for shard.
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// This IteratorCreator returns a single iterator with "value" in the aux fields.
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e.TSDBStore.ShardIteratorCreatorFn = func(id uint64) influxql.IteratorCreator {
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if id != 100 {
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t.Fatalf("unexpected shard id: %d", id)
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}
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var ic IteratorCreator
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ic.CreateIteratorFn = func(opt influxql.IteratorOptions) (influxql.Iterator, error) {
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return &FloatIterator{Points: []influxql.FloatPoint{
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{Name: "cpu", Time: int64(0 * time.Second), Aux: []interface{}{float64(100)}},
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{Name: "cpu", Time: int64(1 * time.Second), Aux: []interface{}{float64(200)}},
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}}, nil
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}
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ic.FieldDimensionsFn = func(sources influxql.Sources) (fields, dimensions map[string]struct{}, err error) {
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return map[string]struct{}{"value": struct{}{}}, nil, nil
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}
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ic.SeriesKeysFn = func(opt influxql.IteratorOptions) (influxql.SeriesList, error) {
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return influxql.SeriesList{
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{Name: "cpu", Aux: []influxql.DataType{influxql.Float}},
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}, nil
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}
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return &ic
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}
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// Verify all results from the query.
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if a := ReadAllResults(e.ExecuteQuery(`SELECT * FROM cpu`, "db0", 0)); !reflect.DeepEqual(a, []*influxql.Result{
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{
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StatementID: 0,
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Series: []*models.Row{{
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Name: "cpu",
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Columns: []string{"time", "value"},
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Values: [][]interface{}{
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{time.Unix(0, 0).UTC(), float64(100)},
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{time.Unix(1, 0).UTC(), float64(200)},
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},
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}},
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},
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}) {
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t.Fatalf("unexpected results: %s", spew.Sdump(a))
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}
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}
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// Ensure query executor can enforce a maximum series selection count.
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func TestQueryExecutor_ExecuteQuery_MaxSelectSeriesN(t *testing.T) {
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e := DefaultQueryExecutor()
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e.MaxSelectSeriesN = 3
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// The meta client should return a two shards on the local node.
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e.MetaClient.ShardsByTimeRangeFn = func(sources influxql.Sources, tmin, tmax time.Time) (a []meta.ShardInfo, err error) {
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return []meta.ShardInfo{
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{ID: 100, Owners: []meta.ShardOwner{{NodeID: 0}}},
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{ID: 101, Owners: []meta.ShardOwner{{NodeID: 0}}},
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}, nil
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}
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// This iterator creator returns an iterator that operates on 2 series.
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// Reuse this iterator for both shards. This brings the total series count to 4.
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var ic IteratorCreator
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ic.CreateIteratorFn = func(opt influxql.IteratorOptions) (influxql.Iterator, error) {
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return &FloatIterator{
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Points: []influxql.FloatPoint{{Name: "cpu", Time: int64(0 * time.Second), Aux: []interface{}{float64(100)}}},
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stats: influxql.IteratorStats{SeriesN: 2},
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}, nil
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}
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ic.FieldDimensionsFn = func(sources influxql.Sources) (fields, dimensions map[string]struct{}, err error) {
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return map[string]struct{}{"value": struct{}{}}, nil, nil
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}
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ic.SeriesKeysFn = func(opt influxql.IteratorOptions) (influxql.SeriesList, error) {
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return influxql.SeriesList{
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{Name: "cpu", Aux: []influxql.DataType{influxql.Float}},
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}, nil
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}
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e.TSDBStore.ShardIteratorCreatorFn = func(id uint64) influxql.IteratorCreator { return &ic }
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// Verify all results from the query.
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if a := ReadAllResults(e.ExecuteQuery(`SELECT count(value) FROM cpu`, "db0", 0)); !reflect.DeepEqual(a, []*influxql.Result{
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{
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StatementID: 0,
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Err: errors.New("max select series count exceeded: 4 series"),
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},
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}) {
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t.Fatalf("unexpected results: %s", spew.Sdump(a))
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}
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}
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// QueryExecutor is a test wrapper for cluster.QueryExecutor.
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type QueryExecutor struct {
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*cluster.QueryExecutor
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MetaClient MetaClient
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TSDBStore TSDBStore
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LogOutput bytes.Buffer
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}
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// NewQueryExecutor returns a new instance of QueryExecutor.
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// This query executor always has a node id of 0.
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func NewQueryExecutor() *QueryExecutor {
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e := &QueryExecutor{
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QueryExecutor: cluster.NewQueryExecutor(),
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}
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e.Node = &influxdb.Node{ID: 0}
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e.QueryExecutor.MetaClient = &e.MetaClient
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e.QueryExecutor.TSDBStore = &e.TSDBStore
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e.QueryExecutor.LogOutput = &e.LogOutput
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if testing.Verbose() {
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e.QueryExecutor.LogOutput = io.MultiWriter(e.QueryExecutor.LogOutput, os.Stderr)
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}
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return e
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}
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// DefaultQueryExecutor returns a QueryExecutor with a database (db0) and retention policy (rp0).
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func DefaultQueryExecutor() *QueryExecutor {
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e := NewQueryExecutor()
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e.MetaClient.DatabaseFn = DefaultMetaClientDatabaseFn
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e.TSDBStore.ExpandSourcesFn = DefaultTSDBStoreExpandSourcesFn
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return e
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}
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// ExecuteQuery parses query and executes against the database.
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func (e *QueryExecutor) ExecuteQuery(query, database string, chunkSize int) <-chan *influxql.Result {
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return e.QueryExecutor.ExecuteQuery(MustParseQuery(query), database, chunkSize, make(chan struct{}))
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}
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// TSDBStore is a mockable implementation of cluster.TSDBStore.
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type TSDBStore struct {
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CreateShardFn func(database, policy string, shardID uint64) error
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WriteToShardFn func(shardID uint64, points []models.Point) error
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DeleteDatabaseFn func(name string) error
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DeleteMeasurementFn func(database, name string) error
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DeleteRetentionPolicyFn func(database, name string) error
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DeleteShardFn func(id uint64) error
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DeleteSeriesFn func(database string, sources []influxql.Source, condition influxql.Expr) error
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ExecuteShowFieldKeysStatementFn func(stmt *influxql.ShowFieldKeysStatement, database string) (models.Rows, error)
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ExecuteShowTagValuesStatementFn func(stmt *influxql.ShowTagValuesStatement, database string) (models.Rows, error)
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ExpandSourcesFn func(sources influxql.Sources) (influxql.Sources, error)
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ShardIteratorCreatorFn func(id uint64) influxql.IteratorCreator
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}
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func (s *TSDBStore) CreateShard(database, policy string, shardID uint64) error {
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if s.CreateShardFn == nil {
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return nil
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}
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return s.CreateShardFn(database, policy, shardID)
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}
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func (s *TSDBStore) WriteToShard(shardID uint64, points []models.Point) error {
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return s.WriteToShardFn(shardID, points)
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}
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func (s *TSDBStore) DeleteDatabase(name string) error {
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return s.DeleteDatabaseFn(name)
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}
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func (s *TSDBStore) DeleteMeasurement(database, name string) error {
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return s.DeleteMeasurementFn(database, name)
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}
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func (s *TSDBStore) DeleteRetentionPolicy(database, name string) error {
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return s.DeleteRetentionPolicyFn(database, name)
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}
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func (s *TSDBStore) DeleteShard(id uint64) error {
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return s.DeleteShardFn(id)
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}
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func (s *TSDBStore) DeleteSeries(database string, sources []influxql.Source, condition influxql.Expr) error {
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return s.DeleteSeriesFn(database, sources, condition)
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}
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func (s *TSDBStore) ExecuteShowFieldKeysStatement(stmt *influxql.ShowFieldKeysStatement, database string) (models.Rows, error) {
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return s.ExecuteShowFieldKeysStatementFn(stmt, database)
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}
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func (s *TSDBStore) ExecuteShowTagValuesStatement(stmt *influxql.ShowTagValuesStatement, database string) (models.Rows, error) {
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return s.ExecuteShowTagValuesStatementFn(stmt, database)
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}
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func (s *TSDBStore) ExpandSources(sources influxql.Sources) (influxql.Sources, error) {
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return s.ExpandSourcesFn(sources)
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}
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func (s *TSDBStore) ShardIteratorCreator(id uint64) influxql.IteratorCreator {
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return s.ShardIteratorCreatorFn(id)
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}
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// DefaultTSDBStoreExpandSourcesFn expands a single source using the default database & retention policy.
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func DefaultTSDBStoreExpandSourcesFn(sources influxql.Sources) (influxql.Sources, error) {
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return influxql.Sources{&influxql.Measurement{
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Database: DefaultDatabase,
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RetentionPolicy: DefaultRetentionPolicy,
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Name: sources[0].(*influxql.Measurement).Name},
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}, nil
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}
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// MustParseQuery parses s into a query. Panic on error.
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func MustParseQuery(s string) *influxql.Query {
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q, err := influxql.ParseQuery(s)
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if err != nil {
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panic(err)
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}
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return q
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}
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// ReadAllResults reads all results from c and returns as a slice.
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func ReadAllResults(c <-chan *influxql.Result) []*influxql.Result {
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var a []*influxql.Result
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for result := range c {
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a = append(a, result)
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}
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return a
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}
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// IteratorCreator is a mockable implementation of IteratorCreator.
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type IteratorCreator struct {
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CreateIteratorFn func(opt influxql.IteratorOptions) (influxql.Iterator, error)
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FieldDimensionsFn func(sources influxql.Sources) (fields, dimensions map[string]struct{}, err error)
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SeriesKeysFn func(opt influxql.IteratorOptions) (influxql.SeriesList, error)
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ExpandSourcesFn func(sources influxql.Sources) (influxql.Sources, error)
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}
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func (ic *IteratorCreator) CreateIterator(opt influxql.IteratorOptions) (influxql.Iterator, error) {
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return ic.CreateIteratorFn(opt)
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}
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func (ic *IteratorCreator) FieldDimensions(sources influxql.Sources) (fields, dimensions map[string]struct{}, err error) {
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return ic.FieldDimensionsFn(sources)
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}
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func (ic *IteratorCreator) SeriesKeys(opt influxql.IteratorOptions) (influxql.SeriesList, error) {
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return ic.SeriesKeysFn(opt)
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}
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func (ic *IteratorCreator) ExpandSources(sources influxql.Sources) (influxql.Sources, error) {
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return ic.ExpandSourcesFn(sources)
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}
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// FloatIterator is a represents an iterator that reads from a slice.
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type FloatIterator struct {
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Points []influxql.FloatPoint
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stats influxql.IteratorStats
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}
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func (itr *FloatIterator) Stats() influxql.IteratorStats { return itr.stats }
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func (itr *FloatIterator) Close() error { return nil }
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// Next returns the next value and shifts it off the beginning of the points slice.
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func (itr *FloatIterator) Next() *influxql.FloatPoint {
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if len(itr.Points) == 0 {
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return nil
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}
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v := &itr.Points[0]
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itr.Points = itr.Points[1:]
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return v
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}
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