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datum_set.go
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/
datum_set.go
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package worker
import (
"fmt"
"github.com/pachyderm/pachyderm/src/client"
"github.com/pachyderm/pachyderm/src/client/pfs"
"github.com/pachyderm/pachyderm/src/client/pps"
"golang.org/x/net/context"
)
// DatumFactory is an interface which allows you to iterate through the datums
// for a job.
type DatumFactory interface {
Len() int
Datum(i int) []*Input
}
type atomDatumFactory struct {
inputs []*Input
index int
}
func newAtomDatumFactory(ctx context.Context, pfsClient pfs.APIClient, input *pps.AtomInput) (DatumFactory, error) {
result := &atomDatumFactory{}
fileInfos, err := pfsClient.GlobFile(ctx, &pfs.GlobFileRequest{
Commit: client.NewCommit(input.Repo, input.Commit),
Pattern: input.Glob,
})
if err != nil {
return nil, err
}
for _, fileInfo := range fileInfos.FileInfo {
result.inputs = append(result.inputs, &Input{
FileInfo: fileInfo,
Name: input.Name,
Lazy: input.Lazy,
Branch: input.Branch,
})
}
return result, nil
}
func (d *atomDatumFactory) Len() int {
return len(d.inputs)
}
func (d *atomDatumFactory) Datum(i int) []*Input {
return []*Input{d.inputs[i]}
}
type unionDatumFactory struct {
inputs []DatumFactory
}
func newUnionDatumFactory(ctx context.Context, pfsClient pfs.APIClient, union []*pps.Input) (DatumFactory, error) {
result := &unionDatumFactory{}
for _, input := range union {
datumFactory, err := NewDatumFactory(ctx, pfsClient, input)
if err != nil {
return nil, err
}
result.inputs = append(result.inputs, datumFactory)
}
return result, nil
}
func (d *unionDatumFactory) Len() int {
result := 0
for _, datumFactory := range d.inputs {
result += datumFactory.Len()
}
return result
}
func (d *unionDatumFactory) Datum(i int) []*Input {
for _, datumFactory := range d.inputs {
if i < datumFactory.Len() {
return datumFactory.Datum(i)
}
i -= datumFactory.Len()
}
panic("index out of bounds")
}
type crossDatumFactory struct {
inputs []DatumFactory
}
func (d *crossDatumFactory) Len() int {
if len(d.inputs) == 0 {
return 0
}
result := d.inputs[0].Len()
for i := 1; i < len(d.inputs); i++ {
result *= d.inputs[i].Len()
}
return result
}
func (d *crossDatumFactory) Datum(i int) []*Input {
if i >= d.Len() {
panic("index out of bounds")
}
var result []*Input
for _, datumFactory := range d.inputs {
result = append(result, datumFactory.Datum(i%datumFactory.Len())...)
i /= datumFactory.Len()
}
return result
}
func newCrossDatumFactory(ctx context.Context, pfsClient pfs.APIClient, cross []*pps.Input) (DatumFactory, error) {
result := &crossDatumFactory{}
for _, input := range cross {
datumFactory, err := NewDatumFactory(ctx, pfsClient, input)
if err != nil {
return nil, err
}
result.inputs = append(result.inputs, datumFactory)
}
return result, nil
}
func newCronDatumFactory(ctx context.Context, pfsClient pfs.APIClient, input *pps.CronInput) (DatumFactory, error) {
return newAtomDatumFactory(ctx, pfsClient, &pps.AtomInput{
Name: input.Name,
Repo: input.Repo,
Branch: "master",
Commit: input.Commit,
Glob: "time",
})
}
// NewDatumFactory creates a datumFactory for an input.
func NewDatumFactory(ctx context.Context, pfsClient pfs.APIClient, input *pps.Input) (DatumFactory, error) {
switch {
case input.Atom != nil:
return newAtomDatumFactory(ctx, pfsClient, input.Atom)
case input.Union != nil:
return newUnionDatumFactory(ctx, pfsClient, input.Union)
case input.Cross != nil:
return newCrossDatumFactory(ctx, pfsClient, input.Cross)
case input.Cron != nil:
return newCronDatumFactory(ctx, pfsClient, input.Cron)
}
return nil, fmt.Errorf("unrecognized input type")
}