engine

package
v0.5.0-rc.5 Latest Latest
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 Go to latest Published: Mar 11, 2014 License: MIT Imports: 11 Imported by: 0

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Index

Constants

View Source 
const (
	MAX_SERIES_IN_RESPONSE = 10000
)
View Source 
const (
	POINT_BATCH_SIZE = 100
)

Variables

View Source 
var ALL_GROUP_IDENTIFIER = Group0{}

Functions

func DivideOperator added in v0.5.0 

func DivideOperator(elems []*parser.Value, fields []string, point *protocol.Point) (*protocol.FieldValue, error)

func EqualityOperator added in v0.5.0 

func EqualityOperator(leftValue, rightValue *protocol.FieldValue) (bool, error)

func Filter added in v0.5.0 

func Filter(query *parser.SelectQuery, series *protocol.Series) (*protocol.Series, error)

func GetRegisteredAggregators added in v0.5.0 

func GetRegisteredAggregators() (names []string)

used in testing to get a list of all aggregators

func GetValue added in v0.5.0 

func GetValue(value *parser.Value, fields []string, point *protocol.Point) (*protocol.FieldValue, error)

func GreaterThanOperator added in v0.5.0 

func GreaterThanOperator(leftValue, rightValue *protocol.FieldValue) (bool, error)

func GreaterThanOrEqualOperator added in v0.5.0 

func GreaterThanOrEqualOperator(leftValue, rightValue *protocol.FieldValue) (bool, error)

func InOperator added in v0.5.0 

func InOperator(leftValue *protocol.FieldValue, rightValue []*protocol.FieldValue) (bool, error)

func MinusOperator added in v0.5.0 

func MinusOperator(elems []*parser.Value, fields []string, point *protocol.Point) (*protocol.FieldValue, error)

func MultiplyOperator added in v0.5.0 

func MultiplyOperator(elems []*parser.Value, fields []string, point *protocol.Point) (*protocol.FieldValue, error)

func PlusOperator added in v0.5.0 

func PlusOperator(elems []*parser.Value, fields []string, point *protocol.Point) (*protocol.FieldValue, error)

func RegexMatcherOperator added in v0.5.0 

func RegexMatcherOperator(leftValue, rightValue *protocol.FieldValue) (bool, error)

func SortInt64 

func SortInt64(ints []int64)

Types

type AbstractAggregator added in v0.3.0 

type AbstractAggregator struct {
	Aggregator
	// contains filtered or unexported fields
}

func (*AbstractAggregator) InitializeFieldsMetadata added in v0.3.0 

func (self *AbstractAggregator) InitializeFieldsMetadata(series *protocol.Series) error

type Aggregator 

type Aggregator interface {
	AggregatePoint(series string, group interface{}, p *protocol.Point) error
	InitializeFieldsMetadata(series *protocol.Series) error
	GetValues(series string, group interface{}) [][]*protocol.FieldValue
	ColumnNames() []string
}

func NewCompositeAggregator added in v0.0.6 

func NewCompositeAggregator(left, right Aggregator) (Aggregator, error)

func NewCountAggregator 

func NewCountAggregator(q *parser.SelectQuery, v *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewCumulativeArithmeticAggregator 

func NewCumulativeArithmeticAggregator(name string, value *parser.Value, initialValue float64, defaultValue *parser.Value, operation Operation) (Aggregator, error)

func NewDerivativeAggregator added in v0.0.8 

func NewDerivativeAggregator(q *parser.SelectQuery, v *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewDistinctAggregator 

func NewDistinctAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewFirstAggregator added in v0.3.0 

func NewFirstAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewFirstOrLastAggregator added in v0.3.0 

func NewFirstOrLastAggregator(name string, v *parser.Value, isFirst bool, defaultValue *parser.Value) (Aggregator, error)

func NewHistogramAggregator added in v0.3.0 

func NewHistogramAggregator(q *parser.SelectQuery, v *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewLastAggregator added in v0.3.0 

func NewLastAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewMaxAggregator 

func NewMaxAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewMeanAggregator 

func NewMeanAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewMedianAggregator 

func NewMedianAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewMinAggregator 

func NewMinAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewModeAggregator 

func NewModeAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewPercentileAggregator 

func NewPercentileAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewStandardDeviationAggregator added in v0.0.9 

func NewStandardDeviationAggregator(q *parser.SelectQuery, v *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewSumAggregator 

func NewSumAggregator(_ *parser.SelectQuery, value *parser.Value, defaultValue *parser.Value) (Aggregator, error)

func NewTimestampAggregator 

func NewTimestampAggregator(query *parser.SelectQuery, _ *parser.Value) (Aggregator, error)

type AggregatorInitializer 

type AggregatorInitializer func(*parser.SelectQuery, *parser.Value, *parser.Value) (Aggregator, error)

Initialize a new aggregator given the query, the function call of the aggregator and the default value that should be returned if the bucket doesn't have any points

type ArithmeticOperator added in v0.5.0 

type ArithmeticOperator func(elems []*parser.Value, fields []string, point *protocol.Point) (*protocol.FieldValue, error)

type AscendingAggregatorSortableGroups added in v0.4.0 

type AscendingAggregatorSortableGroups struct {
	CommonSortableGroups
	// contains filtered or unexported fields
}

func (*AscendingAggregatorSortableGroups) Less added in v0.4.0 

func (self *AscendingAggregatorSortableGroups) Less(i, j int) bool

type AscendingGroupTimestampSortableGroups added in v0.4.0 

type AscendingGroupTimestampSortableGroups struct {
	CommonSortableGroups
}

func (*AscendingGroupTimestampSortableGroups) Less added in v0.4.0 

func (self *AscendingGroupTimestampSortableGroups) Less(i, j int) bool

type BooleanOperation added in v0.5.0 

type BooleanOperation func(leftValue *protocol.FieldValue, rightValues []*protocol.FieldValue) (bool, error)

type CommonSortableGroups added in v0.4.0 

type CommonSortableGroups struct {
	// contains filtered or unexported fields
}

func (*CommonSortableGroups) GetSortedGroups added in v0.4.0 

func (self *CommonSortableGroups) GetSortedGroups() []Group

func (*CommonSortableGroups) Len added in v0.4.0 

func (self *CommonSortableGroups) Len() int

func (*CommonSortableGroups) Swap added in v0.4.0 

func (self *CommonSortableGroups) Swap(i, j int)

type CompositeAggregator added in v0.0.6 

type CompositeAggregator struct {
	// contains filtered or unexported fields
}

func (*CompositeAggregator) AggregatePoint added in v0.0.6 

func (self *CompositeAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*CompositeAggregator) ColumnNames added in v0.3.0 

func (self *CompositeAggregator) ColumnNames() []string

func (*CompositeAggregator) GetValues added in v0.3.0 

func (self *CompositeAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

func (*CompositeAggregator) InitializeFieldsMetadata added in v0.0.6 

func (self *CompositeAggregator) InitializeFieldsMetadata(series *protocol.Series) error

type CountAggregator 

type CountAggregator struct {
	// contains filtered or unexported fields
}

func (*CountAggregator) AggregatePoint 

func (self *CountAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*CountAggregator) ColumnNames added in v0.3.0 

func (self *CountAggregator) ColumnNames() []string

func (*CountAggregator) GetValues added in v0.3.0 

func (self *CountAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

func (*CountAggregator) InitializeFieldsMetadata 

func (self *CountAggregator) InitializeFieldsMetadata(series *protocol.Series) error

type CumulativeArithmeticAggregator 

type CumulativeArithmeticAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*CumulativeArithmeticAggregator) AggregatePoint 

func (self *CumulativeArithmeticAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*CumulativeArithmeticAggregator) ColumnNames added in v0.3.0 

func (self *CumulativeArithmeticAggregator) ColumnNames() []string

func (*CumulativeArithmeticAggregator) GetValues added in v0.3.0 

func (self *CumulativeArithmeticAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type DerivativeAggregator added in v0.0.8 

type DerivativeAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*DerivativeAggregator) AggregatePoint added in v0.0.8 

func (self *DerivativeAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*DerivativeAggregator) ColumnNames added in v0.3.0 

func (self *DerivativeAggregator) ColumnNames() []string

func (*DerivativeAggregator) GetValues added in v0.3.0 

func (self *DerivativeAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type DescendingAggregatorSortableGroups added in v0.4.0 

type DescendingAggregatorSortableGroups struct {
	CommonSortableGroups
	// contains filtered or unexported fields
}

func (*DescendingAggregatorSortableGroups) Less added in v0.4.0 

func (self *DescendingAggregatorSortableGroups) Less(i, j int) bool

type DescendingGroupTimestampSortableGroups added in v0.4.0 

type DescendingGroupTimestampSortableGroups struct {
	CommonSortableGroups
}

func (*DescendingGroupTimestampSortableGroups) Less added in v0.4.0 

func (self *DescendingGroupTimestampSortableGroups) Less(i, j int) bool

type DistinctAggregator 

type DistinctAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*DistinctAggregator) AggregatePoint 

func (self *DistinctAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*DistinctAggregator) ColumnNames added in v0.3.0 

func (self *DistinctAggregator) ColumnNames() []string

func (*DistinctAggregator) GetValues added in v0.3.0 

func (self *DistinctAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type EngineI 

type EngineI interface {
	RunQuery(user common.User, database string, query string, localOnly bool, yield func(*protocol.Series) error) error
}

type FirstOrLastAggregator added in v0.3.0 

type FirstOrLastAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*FirstOrLastAggregator) AggregatePoint added in v0.3.0 

func (self *FirstOrLastAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*FirstOrLastAggregator) ColumnNames added in v0.3.0 

func (self *FirstOrLastAggregator) ColumnNames() []string

func (*FirstOrLastAggregator) GetValues added in v0.3.0 

func (self *FirstOrLastAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type Group added in v0.4.0 

type Group interface {
	HasTimestamp() bool
	GetTimestamp() int64
	GetValue(int) interface{}
	WithoutTimestamp() Group
	WithTimestamp(int64) Group
}

type Group0 added in v0.4.0 

type Group0 struct {
	Group
}

func (Group0) GetTimestamp added in v0.4.0 

func (self Group0) GetTimestamp() int64

func (Group0) GetValue added in v0.4.0 

func (self Group0) GetValue(idx int) interface{}

func (Group0) HasTimestamp added in v0.4.0 

func (self Group0) HasTimestamp() bool

func (Group0) WithTimestamp added in v0.4.0 

func (self Group0) WithTimestamp(timestamp int64) Group

func (Group0) WithoutTimestamp added in v0.4.0 

func (self Group0) WithoutTimestamp() Group

type Group1 added in v0.4.0 

type Group1 struct {
	// contains filtered or unexported fields
}

func (Group1) GetTimestamp added in v0.4.0 

func (self Group1) GetTimestamp() int64

func (Group1) GetValue added in v0.4.0 

func (self Group1) GetValue(idx int) interface{}

func (Group1) HasTimestamp added in v0.4.0 

func (self Group1) HasTimestamp() bool

func (Group1) WithTimestamp added in v0.4.0 

func (self Group1) WithTimestamp(timestamp int64) Group

func (Group1) WithoutTimestamp added in v0.4.0 

func (self Group1) WithoutTimestamp() Group

type Group2 added in v0.4.0 

type Group2 struct {
	// contains filtered or unexported fields
}

func (Group2) GetTimestamp added in v0.4.0 

func (self Group2) GetTimestamp() int64

func (Group2) GetValue added in v0.4.0 

func (self Group2) GetValue(idx int) interface{}

func (Group2) HasTimestamp added in v0.4.0 

func (self Group2) HasTimestamp() bool

func (Group2) WithTimestamp added in v0.4.0 

func (self Group2) WithTimestamp(timestamp int64) Group

func (Group2) WithoutTimestamp added in v0.4.0 

func (self Group2) WithoutTimestamp() Group

type Group3 added in v0.4.0 

type Group3 struct {
	// contains filtered or unexported fields
}

func (Group3) GetTimestamp added in v0.4.0 

func (self Group3) GetTimestamp() int64

func (Group3) GetValue added in v0.4.0 

func (self Group3) GetValue(idx int) interface{}

func (Group3) HasTimestamp added in v0.4.0 

func (self Group3) HasTimestamp() bool

func (Group3) WithTimestamp added in v0.4.0 

func (self Group3) WithTimestamp(timestamp int64) Group

func (Group3) WithoutTimestamp added in v0.4.0 

func (self Group3) WithoutTimestamp() Group

type HistogramAggregator added in v0.3.0 

type HistogramAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*HistogramAggregator) AggregatePoint added in v0.3.0 

func (self *HistogramAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*HistogramAggregator) ColumnNames added in v0.3.0 

func (self *HistogramAggregator) ColumnNames() []string

func (*HistogramAggregator) GetValues added in v0.3.0 

func (self *HistogramAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type Int64Slice 

type Int64Slice []int64

Int64Slice attaches the methods of sort.Interface to []int64, sorting in increasing order.

func (Int64Slice) Len 

func (p Int64Slice) Len() int

func (Int64Slice) Less 

func (p Int64Slice) Less(i, j int) bool

func (Int64Slice) Swap 

func (p Int64Slice) Swap(i, j int)

type Limiter added in v0.5.0 

type Limiter struct {
	// contains filtered or unexported fields
}

func NewLimiter added in v0.5.0 

func NewLimiter(limit int) *Limiter

type ListSeriesEngine added in v0.5.0 

type ListSeriesEngine struct {
	// contains filtered or unexported fields
}

func NewListSeriesEngine added in v0.5.0 

func NewListSeriesEngine(responseChan chan *protocol.Response) *ListSeriesEngine

func (*ListSeriesEngine) Close added in v0.5.0 

func (self *ListSeriesEngine) Close()

func (*ListSeriesEngine) YieldPoint added in v0.5.0 

func (self *ListSeriesEngine) YieldPoint(seriesName *string, columnNames []string, point *protocol.Point) bool

type Mapper 

type Mapper func(*protocol.Point) Group

Mapper given a point returns a group identifier as the first return result and a non-time dependent group (the first group without time) as the second result

type MeanAggregator 

type MeanAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*MeanAggregator) AggregatePoint 

func (self *MeanAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*MeanAggregator) ColumnNames added in v0.3.0 

func (self *MeanAggregator) ColumnNames() []string

func (*MeanAggregator) GetValues added in v0.3.0 

func (self *MeanAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type ModeAggregator 

type ModeAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*ModeAggregator) AggregatePoint 

func (self *ModeAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*ModeAggregator) ColumnNames added in v0.3.0 

func (self *ModeAggregator) ColumnNames() []string

func (*ModeAggregator) GetValues added in v0.3.0 

func (self *ModeAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type Operation 

type Operation func(currentValue float64, newValue *protocol.FieldValue) float64

type PassthroughEngine added in v0.5.0 

type PassthroughEngine struct {
	// contains filtered or unexported fields
}

func NewPassthroughEngine added in v0.5.0 

func NewPassthroughEngine(responseChan chan *protocol.Response, maxPointsInResponse int) *PassthroughEngine

func NewPassthroughEngineWithLimit added in v0.5.0 

func NewPassthroughEngineWithLimit(responseChan chan *protocol.Response, maxPointsInResponse, limit int) *PassthroughEngine

func (*PassthroughEngine) Close added in v0.5.0 

func (self *PassthroughEngine) Close()

func (*PassthroughEngine) YieldPoint added in v0.5.0 

func (self *PassthroughEngine) YieldPoint(seriesName *string, columnNames []string, point *protocol.Point) bool

type PercentileAggregator 

type PercentileAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*PercentileAggregator) AggregatePoint 

func (self *PercentileAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*PercentileAggregator) ColumnNames added in v0.3.0 

func (self *PercentileAggregator) ColumnNames() []string

func (*PercentileAggregator) GetValues added in v0.3.0 

func (self *PercentileAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type PointFilter added in v0.5.0 

type PointFilter struct {
	// contains filtered or unexported fields
}

Pair this with a query on a specific series for queries with a where clause

func NewPointFilter added in v0.5.0 

func NewPointFilter(query *parser.SelectQuery, queryColumnNames []string) *PointFilter

type PointRange added in v0.4.0 

type PointRange struct {
	// contains filtered or unexported fields
}

func (*PointRange) UpdateRange added in v0.4.0 

func (self *PointRange) UpdateRange(point *protocol.Point)

type PointSlice 

type PointSlice []protocol.Point

type QueryEngine 

type QueryEngine struct {
	// contains filtered or unexported fields
}

func NewQueryEngine 

func NewQueryEngine(query *parser.SelectQuery, responseChan chan *protocol.Response) (*QueryEngine, error)

func (*QueryEngine) Close added in v0.5.0 

func (self *QueryEngine) Close()

func (*QueryEngine) YieldPoint added in v0.5.0 

func (self *QueryEngine) YieldPoint(seriesName *string, fieldNames []string, point *protocol.Point) (shouldContinue bool)

Returns false if the query should be stopped (either because of limit or error)

type SortableGroups added in v0.2.0 

type SortableGroups interface {
	sort.Interface
	GetSortedGroups() []Group
}

type StandardDeviationAggregator added in v0.0.9 

type StandardDeviationAggregator struct {
	AbstractAggregator
	// contains filtered or unexported fields
}

func (*StandardDeviationAggregator) AggregatePoint added in v0.0.9 

func (self *StandardDeviationAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*StandardDeviationAggregator) ColumnNames added in v0.3.0 

func (self *StandardDeviationAggregator) ColumnNames() []string

func (*StandardDeviationAggregator) GetValues added in v0.3.0 

func (self *StandardDeviationAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

type StandardDeviationRunning added in v0.0.9 

type StandardDeviationRunning struct {
	// contains filtered or unexported fields
}

type TimestampAggregator 

type TimestampAggregator struct {
	// contains filtered or unexported fields
}

func (*TimestampAggregator) AggregatePoint 

func (self *TimestampAggregator) AggregatePoint(series string, group interface{}, p *protocol.Point) error

func (*TimestampAggregator) ColumnNames added in v0.3.0 

func (self *TimestampAggregator) ColumnNames() []string

func (*TimestampAggregator) GetValues added in v0.3.0 

func (self *TimestampAggregator) GetValues(series string, group interface{}) [][]*protocol.FieldValue

func (*TimestampAggregator) InitializeFieldsMetadata 

func (self *TimestampAggregator) InitializeFieldsMetadata(series *protocol.Series) error

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