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sink.go
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sink.go
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package debug
import (
"fmt"
"github.com/influxdata/flux"
"github.com/influxdata/flux/execute"
"github.com/influxdata/flux/plan"
"github.com/influxdata/flux/runtime"
)
const SinkKind = "internal/debug.sink"
type SinkOpSpec struct{}
func init() {
sinkSignature := runtime.MustLookupBuiltinType("internal/debug", "sink")
runtime.RegisterPackageValue("internal/debug", "sink", flux.MustValue(flux.FunctionValue(SinkKind, createSinkOpSpec, sinkSignature)))
plan.RegisterProcedureSpec(SinkKind, newSinkProcedure, SinkKind)
execute.RegisterTransformation(SinkKind, createSinkTransformation)
}
func createSinkOpSpec(args flux.Arguments, a *flux.Administration) (flux.OperationSpec, error) {
if err := a.AddParentFromArgs(args); err != nil {
return nil, err
}
return new(SinkOpSpec), nil
}
func (s *SinkOpSpec) Kind() flux.OperationKind {
return SinkKind
}
type SinkProcedureSpec struct {
plan.DefaultCost
}
func newSinkProcedure(qs flux.OperationSpec, pa plan.Administration) (plan.ProcedureSpec, error) {
_, ok := qs.(*SinkOpSpec)
if !ok {
return nil, fmt.Errorf("invalid spec type %T", qs)
}
return new(SinkProcedureSpec), nil
}
func (s *SinkProcedureSpec) Kind() plan.ProcedureKind {
return SinkKind
}
func (s *SinkProcedureSpec) Copy() plan.ProcedureSpec {
return new(SinkProcedureSpec)
}
// TriggerSpec implements plan.TriggerAwareProcedureSpec
func (s *SinkProcedureSpec) TriggerSpec() plan.TriggerSpec {
return plan.NarrowTransformationTriggerSpec{}
}
func createSinkTransformation(id execute.DatasetID, mode execute.AccumulationMode, spec plan.ProcedureSpec, a execute.Administration) (execute.Transformation, execute.Dataset, error) {
s, ok := spec.(*SinkProcedureSpec)
if !ok {
return nil, nil, fmt.Errorf("invalid spec type %T", spec)
}
t, d := NewSinkTransformation(id, s)
return t, d, nil
}
type sinkTransformation struct {
execute.ExecutionNode
d *execute.PassthroughDataset
}
func NewSinkTransformation(id execute.DatasetID, spec *SinkProcedureSpec) (execute.Transformation, execute.Dataset) {
t := &sinkTransformation{
d: execute.NewPassthroughDataset(id),
}
return t, t.d
}
func (t *sinkTransformation) RetractTable(id execute.DatasetID, key flux.GroupKey) error {
return t.d.RetractTable(key)
}
func (t *sinkTransformation) Process(id execute.DatasetID, tbl flux.Table) error {
return tbl.Do(func(cr flux.ColReader) error {
return nil
})
}
func (t *sinkTransformation) UpdateWatermark(id execute.DatasetID, mark execute.Time) error {
return t.d.UpdateWatermark(mark)
}
func (t *sinkTransformation) UpdateProcessingTime(id execute.DatasetID, pt execute.Time) error {
return t.d.UpdateProcessingTime(pt)
}
func (t *sinkTransformation) Finish(id execute.DatasetID, err error) {
t.d.Finish(err)
}