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worker.go
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worker.go
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package ingest
import (
"emperror.dev/errors"
"github.com/je4/utils/v2/pkg/zLogger"
"io"
"sync"
"time"
)
type IngestType uint
const (
IngestType_KEEP IngestType = iota
IngestType_COPY
IngestType_MOVE
)
var IngestTypeStrings = map[IngestType]string{
IngestType_KEEP: "keep",
IngestType_COPY: "copy",
IngestType_MOVE: "move",
}
var IngestTypeValues = map[string]IngestType{
"keep": IngestType_KEEP,
"copy": IngestType_COPY,
"move": IngestType_MOVE,
}
type storageStruct struct {
Name string
Filebase string
Datadir string
Subitemdir string
Tempdir string
}
type collectionStruct struct {
Name string
Storage *storageStruct
}
type JobStruct struct {
collection *collectionStruct
signature string
urn string
ingestType IngestType
}
func NewWorkerPool(num int, ingestTimeout time.Duration, doIt func(job *JobStruct) error, logger zLogger.ZLogger) (chan *JobStruct, io.Closer) {
wp := &workerPool{
jobChan: make(chan *JobStruct),
wg: &sync.WaitGroup{},
ingestTimeout: ingestTimeout,
doIt: doIt,
logger: logger,
}
wp.Start(num)
return wp.jobChan, wp
}
type workerPool struct {
jobChan chan *JobStruct
wg *sync.WaitGroup
ingestTimeout time.Duration
doIt func(job *JobStruct) error
logger zLogger.ZLogger
}
func (wp *workerPool) Start(num int) {
for i := 0; i < num; i++ {
wp.AddWorker()
}
}
func (wp *workerPool) Close() error {
close(wp.jobChan)
c := make(chan struct{})
go func() {
defer close(c)
wp.wg.Wait()
}()
select {
case <-c:
return nil // completed normally
case <-time.After(wp.ingestTimeout):
return errors.New("timed out") // timed out
}
}
func (wp *workerPool) AddWorker() {
wp.wg.Add(1)
defer wp.wg.Done()
go func() {
for job := range wp.jobChan {
// process job
if err := wp.doIt(job); err != nil {
wp.logger.Error().Err(err).Msg("error processing job")
}
}
}()
}