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batching.go
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batching.go
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package batching
import (
"github.com/deqinganz/batch-processor"
. "github.com/deqinganz/batching-api/api"
"github.com/deqinganz/micro-batching/internal/config"
"github.com/deqinganz/micro-batching/internal/service"
"github.com/deqinganz/micro-batching/internal/service/preprocess"
"github.com/deqinganz/micro-batching/internal/service/preprocess/processors"
"github.com/go-co-op/gocron/v2"
"github.com/google/uuid"
"log"
"sync"
"time"
)
type Batching struct {
config config.RunConfig
queue service.Queue
batchProcessor batchprocessor.BatchProcessor
scheduler gocron.Scheduler
preProcess *preprocess.JobProcess
batchesWg sync.WaitGroup
}
func NewBatching() (Batching, error) {
c, err := config.ReadConfig("config.json")
if err != nil {
return Batching{}, err
}
return Batching{
config: c,
queue: service.Queue{},
}, nil
}
func NewBatchingWithConfig(c config.RunConfig) Batching {
return Batching{
config: c,
queue: service.Queue{},
}
}
// Start create a new scheduler and start it
func (b *Batching) Start() {
s, err := gocron.NewScheduler()
if err != nil {
log.Fatal("Failed to create new scheduler")
return
}
b.scheduler = s
_, err = b.scheduler.NewJob(
gocron.DurationJob(
time.Duration(b.config.Frequency)*time.Second,
),
gocron.NewTask(
func() {
b.Post()
},
),
)
if err != nil {
log.Fatal("Failed to create new job")
return
}
b.scheduler.Start()
}
// Restart stops the scheduler and starts it again
func (b *Batching) Restart() {
if b.scheduler == nil {
return
}
err := b.scheduler.Shutdown()
if err != nil {
log.Fatal("Failed to shutdown scheduler")
return
}
b.Start()
}
// Take creates a new job and adds it to the queue
func (b *Batching) Take(jobRequest JobRequest) Job {
job := Job{
Id: uuid.New(),
Status: QUEUED,
Type: jobRequest.Type,
Name: jobRequest.Name,
Params: Job_Params(jobRequest.Params),
}
b.queue.Enqueue(job)
return job
}
// JobInfo returns the job by the given id
func (b *Batching) JobInfo(id uuid.UUID) (Job, error) {
j, err := b.queue.Find(id)
if err != nil {
return Job{}, err
}
return j, nil
}
func (b *Batching) GetFrequency() BatchFrequency {
return BatchFrequency{
Frequency: b.config.Frequency,
}
}
func (b *Batching) GetBatchSize() BatchSize {
return BatchSize{
BatchSize: b.config.BatchSize,
}
}
func (b *Batching) SetFrequency(frequency BatchFrequency) {
b.config.Frequency = frequency.Frequency
}
func (b *Batching) SetBatchSize(batchSize BatchSize) {
b.config.BatchSize = batchSize.BatchSize
}
// SetPreProcess adds or removes preprocessing to the batching
func (b *Batching) SetPreProcess(on bool) {
if on {
if b.preProcess != nil {
log.Print("preprocessing is already on")
} else {
b.preProcess = preprocess.NewJobProcess()
b.preProcess.Use(UPDATEUSERINFO, &processors.DummyProcessor{})
b.preProcess.Use(BALANCEUPDATE, &processors.BalanceUpdate{})
log.Print("Added preprocessing")
}
} else {
b.preProcess = nil
log.Print("Removed preprocessing")
}
}
// Post prepares the batch of jobs and starts a new goroutine to process it
func (b *Batching) Post() {
if b.queue.Size() == 0 {
log.Print("No jobs to process")
return
}
if b.preProcess != nil {
b.queue.EnqueueJobs(
b.preProcess.Process(b.queue.Dequeue(b.queue.Size())))
}
jobs := b.queue.Dequeue(b.config.BatchSize)
b.batchesWg.Add(1)
go b.post(jobs, &b.batchesWg)
}
// post processes the batch of jobs and finishes the wait group
func (b *Batching) post(jobs []Job, wg *sync.WaitGroup) {
defer wg.Done()
b.batchProcessor.ProcessAndSleep(jobs, 5)
log.Print("Batch processed")
}
// ShutDown stops the scheduler and waits for all batches to finish
func (b *Batching) ShutDown() error {
if b.scheduler != nil {
err := b.scheduler.Shutdown()
if err != nil {
return err
}
}
b.batchesWg.Wait()
return nil
}