traceqlengine

package
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 Go to latest Published: Jan 21, 2024 License: Apache-2.0 Imports: 16 Imported by: 0

Documentation

Overview

Package traceqlengine implements TraceQL evaluation engine.

Index

Constants

This section is empty.

Variables

View Source 
var NopProcessor = &nopProcessor{}

NopProcessor is a processor that does nothing.

Functions

func ReduceExpr 

func ReduceExpr(expr traceql.TypedExpr) traceql.TypedExpr

ReduceExpr evaluates constant expressions and simplifies expression.

Types

type AggregateEvalauter 

type AggregateEvalauter[A Aggregator] struct {
	Agg A
}

AggregateEvalauter evaluates aggregation expression.

func (*AggregateEvalauter[A]) Eval 

func (e *AggregateEvalauter[A]) Eval(_ tracestorage.Span, ctx EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type Aggregator 

type Aggregator interface {
	Aggregate(set Spanset) float64
}

Aggregator is an aggregation expression.

type AttributeEvaluater 

type AttributeEvaluater struct {
	Name string
}

AttributeEvaluater evaluates attribute selector.

func (*AttributeEvaluater) Eval 

func (e *AttributeEvaluater) Eval(span tracestorage.Span, _ EvaluateCtx) traceql.Static

Eval implemenets Evaluater.

type AvgAgg 

type AvgAgg struct {
	Sum SumAgg
}

AvgAgg is `avg(...)` aggregator.

func (AvgAgg) Aggregate 

func (agg AvgAgg) Aggregate(set Spanset) float64

Aggregate implements Aggregator.

type BinaryEvaluater 

type BinaryEvaluater struct {
	Left  Evaluater
	Op    BinaryOp
	Right Evaluater
}

BinaryEvaluater is a binary operation Evaluater.

func (*BinaryEvaluater) Eval 

func (e *BinaryEvaluater) Eval(span tracestorage.Span, ctx EvaluateCtx) traceql.Static

Eval implemenets Evaluater.

type BinaryExpr 

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

BinaryExpr merges two pipelines.

func (*BinaryExpr) Process 

func (f *BinaryExpr) Process(sets []Spanset) ([]Spanset, error)

Process implements Processor.

type BinaryOp 

type BinaryOp func(a, b traceql.Static) traceql.Static

BinaryOp is a binary operation.

type BinarySpansetExpr 

type BinarySpansetExpr struct {
	Left  Processor
	Op    SpansetOp
	Right Processor
}

BinarySpansetExpr merges two spansets.

func (*BinarySpansetExpr) Process 

func (f *BinarySpansetExpr) Process(sets []Spanset) (output []Spanset, _ error)

Process implements Processor.

type CountAgg 

type CountAgg struct{}

CountAgg is a `count()` aggregator.

func (CountAgg) Aggregate 

func (CountAgg) Aggregate(set Spanset) float64

Aggregate implements Aggregator.

type Engine 

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

Engine is a TraceQL evaluation engine.

func NewEngine 

func NewEngine(querier Querier, opts Options) *Engine

NewEngine creates new Engine.

func (*Engine) Eval 

func (e *Engine) Eval(ctx context.Context, query string, params EvalParams) (traces *tempoapi.Traces, rerr error)

Eval parses and evaluates query.

type EvalParams 

type EvalParams struct {
	// Trace duration to search, optional.
	MinDuration time.Duration
	MaxDuration time.Duration
	// Time range to search, optional.
	Start otelstorage.Timestamp
	End   otelstorage.Timestamp
	Limit int
}

EvalParams sets evaluation parameters.

type EvaluateCtx 

type EvaluateCtx struct {
	Set Spanset
}

EvaluateCtx is evaluation context.

type Evaluater 

type Evaluater interface {
	Eval(span tracestorage.Span, ctx EvaluateCtx) traceql.Static
}

Evaluater evaluates TraceQL expression.

type MaxAgg 

type MaxAgg struct {
	By Evaluater
}

MaxAgg is `max(...)` aggregator.

func (MaxAgg) Aggregate 

func (agg MaxAgg) Aggregate(set Spanset) (r float64)

Aggregate implements Aggregator.

type MemoryQuerier 

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

MemoryQuerier is a simple in-memory querier, used for tests.

func (*MemoryQuerier) Add 

func (q *MemoryQuerier) Add(span tracestorage.Span)

Add adds span to data set.

NOTE: There is no synchronization. Do not call this function concurrently with other methods.

func (*MemoryQuerier) SelectSpansets 

func (q *MemoryQuerier) SelectSpansets(context.Context, SelectSpansetsParams) (iterators.Iterator[Trace], error)

SelectSpansets get spansets from storage.

type MinAgg 

type MinAgg struct {
	By Evaluater
}

MinAgg is `min(...)` aggregator.

func (MinAgg) Aggregate 

func (agg MinAgg) Aggregate(set Spanset) (r float64)

Aggregate implements Aggregator.

type NegEvaluater 

type NegEvaluater struct {
	Sub Evaluater
}

NegEvaluater is a unary negation operation Evaluater.

func (*NegEvaluater) Eval 

func (e *NegEvaluater) Eval(span tracestorage.Span, ctx EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type NotEvaluater 

type NotEvaluater struct {
	Sub Evaluater
}

NotEvaluater is a unary NOT operation Evaluater.

func (*NotEvaluater) Eval 

func (e *NotEvaluater) Eval(span tracestorage.Span, ctx EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type Options 

type Options struct {
	// TracerProvider provides OpenTelemetry tracer for this engine.
	TracerProvider trace.TracerProvider
}

Options sets Engine options.

type ParentEvaluater 

type ParentEvaluater struct{}

ParentEvaluater evaluates `parent` property.

func (*ParentEvaluater) Eval 

func (*ParentEvaluater) Eval(span tracestorage.Span, _ EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type Pipeline 

type Pipeline struct {
	Stages []Processor
}

Pipeline is a multi-stage processor.

func (*Pipeline) Process 

func (p *Pipeline) Process(sets []Spanset) (_ []Spanset, err error)

Process implements Processor.

type Processor 

type Processor interface {
	Process(sets []Spanset) ([]Spanset, error)
}

Processor is a log record processor.

func BuildBinaryExpr 

func BuildBinaryExpr(expr *traceql.BinaryExpr) (Processor, error)

BuildBinaryExpr builds a new binary expression processor.

func BuildExpr 

func BuildExpr(expr traceql.Expr) (Processor, error)

BuildExpr builds given TraceQL expression.

func BuildPipeline 

func BuildPipeline(stages ...traceql.PipelineStage) (Processor, error)

BuildPipeline builds a new Pipeline.

type Querier 

type Querier interface {
	// SelectSpansets get spansets from storage.
	SelectSpansets(ctx context.Context, params SelectSpansetsParams) (iterators.Iterator[Trace], error)
}

Querier does queries to storage.

type ResourceAttributeEvaluater 

type ResourceAttributeEvaluater struct {
	Name string
}

ResourceAttributeEvaluater evaluates resource attribute selector.

func (*ResourceAttributeEvaluater) Eval 

func (e *ResourceAttributeEvaluater) Eval(span tracestorage.Span, _ EvaluateCtx) traceql.Static

Eval implemenets Evaluater.

type RootServiceNameEvaluater 

type RootServiceNameEvaluater struct{}

RootServiceNameEvaluater evaluates `rootServiceName` property.

func (*RootServiceNameEvaluater) Eval 

func (*RootServiceNameEvaluater) Eval(_ tracestorage.Span, ctx EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type RootSpanNameEvaluater 

type RootSpanNameEvaluater struct{}

RootSpanNameEvaluater evaluates `rootName` property.

func (*RootSpanNameEvaluater) Eval 

func (*RootSpanNameEvaluater) Eval(_ tracestorage.Span, ctx EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type ScalarFilter 

type ScalarFilter struct {
	Eval Evaluater
}

ScalarFilter filters Scalars by field expression.

func (*ScalarFilter) Process 

func (f *ScalarFilter) Process(sets []Spanset) (result []Spanset, _ error)

Process implements Processor.

type SelectSpansetsParams 

type SelectSpansetsParams struct {
	Op       traceql.SpansetOp // OpAnd, OpOr
	Matchers []SpanMatcher

	// Time range to query, optional.
	Start, End otelstorage.Timestamp

	// Trace duration, querier should ignore field, if it is zero.
	// TODO(tdakkota): probably, we can put it as SpanMatcher with traceDuration attribute
	//	but it would not work properly with OpOr.
	MinDuration time.Duration
	MaxDuration time.Duration

	Limit int
}

SelectSpansetsParams is a storage query params.

type SpanAttributeEvaluater 

type SpanAttributeEvaluater struct {
	Name string
}

SpanAttributeEvaluater evaluates Span attribute selector.

func (*SpanAttributeEvaluater) Eval 

func (e *SpanAttributeEvaluater) Eval(span tracestorage.Span, _ EvaluateCtx) traceql.Static

Eval implemenets Evaluater.

type SpanDurationEvalauter 

type SpanDurationEvalauter struct{}

SpanDurationEvalauter evaluates `duration` property.

func (*SpanDurationEvalauter) Eval 

func (*SpanDurationEvalauter) Eval(span tracestorage.Span, _ EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type SpanKindEvaluater 

type SpanKindEvaluater struct{}

SpanKindEvaluater evaluates `kind` property.

func (*SpanKindEvaluater) Eval 

func (*SpanKindEvaluater) Eval(span tracestorage.Span, _ EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type SpanMatcher 

type SpanMatcher struct {
	Attribute traceql.Attribute
	Op        traceql.BinaryOp // could be zero, look for spans with such attribute
	Static    traceql.Static
}

SpanMatcher defines span predicate to select.

type SpanNameEvaluater 

type SpanNameEvaluater struct{}

SpanNameEvaluater evaluates `name` property.

func (*SpanNameEvaluater) Eval 

func (*SpanNameEvaluater) Eval(span tracestorage.Span, _ EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type SpanStatusEvaluater 

type SpanStatusEvaluater struct{}

SpanStatusEvaluater evaluates `status` property.

func (*SpanStatusEvaluater) Eval 

func (*SpanStatusEvaluater) Eval(span tracestorage.Span, _ EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type Spanset 

type Spanset struct {
	TraceID otelstorage.TraceID
	Spans   []tracestorage.Span

	Start           time.Time
	RootSpanName    string
	RootServiceName string
	TraceDuration   time.Duration
}

Spanset is a set of spans.

type SpansetFilter 

type SpansetFilter struct {
	Eval Evaluater
}

SpansetFilter filters spansets by field expression.

func (*SpansetFilter) Process 

func (f *SpansetFilter) Process(sets []Spanset) (result []Spanset, _ error)

Process implements Processor.

type SpansetOp 

type SpansetOp func(a, b []Spanset) ([]tracestorage.Span, error)

SpansetOp merges two spansets.

type StaticEvaluater 

type StaticEvaluater struct {
	Val traceql.Static
}

StaticEvaluater is a Evaluater returning a static value.

func (*StaticEvaluater) Eval 

func (e *StaticEvaluater) Eval(tracestorage.Span, EvaluateCtx) traceql.Static

Eval implemenets Evaluater.

type SumAgg 

type SumAgg struct {
	By Evaluater
}

SumAgg is `sum(...)` aggregator.

func (SumAgg) Aggregate 

func (agg SumAgg) Aggregate(set Spanset) (r float64)

Aggregate implements Aggregator.

type Trace 

type Trace struct {
	TraceID otelstorage.TraceID
	Spans   []tracestorage.Span
}

Trace is set of span grouped by trace ID.

type TraceDurationEvaluater 

type TraceDurationEvaluater struct{}

TraceDurationEvaluater evaluates `traceDuration“ property.

func (*TraceDurationEvaluater) Eval 

func (*TraceDurationEvaluater) Eval(_ tracestorage.Span, ctx EvaluateCtx) (r traceql.Static)

Eval implemenets Evaluater.

type UnsupportedError 

type UnsupportedError struct {
	Msg string
}

UnsupportedError is an error that reports unsupported expressions.

func (*UnsupportedError) Error 

func (e *UnsupportedError) Error() string

Error implements error.

Source Files

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