apollo-backend/internal/cmd/worker.go
2022-11-05 20:10:05 -04:00

102 lines
2.3 KiB
Go

package cmd
import (
"context"
"fmt"
"runtime"
"github.com/spf13/cobra"
"go.opentelemetry.io/otel"
"github.com/christianselig/apollo-backend/internal/cmdutil"
"github.com/christianselig/apollo-backend/internal/worker"
)
var (
queues = map[string]worker.NewWorkerFn{
"live-activities": worker.NewLiveActivitiesWorker,
"notifications": worker.NewNotificationsWorker,
"stuck-notifications": worker.NewStuckNotificationsWorker,
"subreddits": worker.NewSubredditsWorker,
"trending": worker.NewTrendingWorker,
"users": worker.NewUsersWorker,
}
)
func WorkerCmd(ctx context.Context) *cobra.Command {
var consumers int
var queueID string
cmd := &cobra.Command{
Use: "worker",
Args: cobra.ExactArgs(0),
Short: "Work through job queues.",
RunE: func(cmd *cobra.Command, args []string) error {
if queueID == "" {
return fmt.Errorf("need a queue to work on")
}
runtime.SetBlockProfileRate(1)
runtime.SetMutexProfileFraction(1)
svc := fmt.Sprintf("worker: %s", queueID)
logger := cmdutil.NewLogger(svc)
defer func() { _ = logger.Sync() }()
tag := fmt.Sprintf("worker:%s", queueID)
statsd, err := cmdutil.NewStatsdClient(tag)
if err != nil {
return err
}
defer statsd.Close()
tracer := otel.Tracer(tag)
poolSize := consumers / 4
db, err := cmdutil.NewDatabasePool(ctx, poolSize)
if err != nil {
return err
}
defer db.Close()
redis, err := cmdutil.NewRedisLocksClient(ctx, poolSize)
if err != nil {
return err
}
defer redis.Close()
qredis, err := cmdutil.NewRedisQueueClient(ctx, poolSize)
if err != nil {
return err
}
defer qredis.Close()
queue, err := cmdutil.NewQueueClient(logger, qredis, "worker")
if err != nil {
return err
}
workerFn, ok := queues[queueID]
if !ok {
return fmt.Errorf("invalid queue: %s", queueID)
}
worker := workerFn(ctx, logger, tracer, statsd, db, redis, queue, consumers)
if err := worker.Start(); err != nil {
return err
}
<-ctx.Done()
worker.Stop()
return nil
},
}
cmd.Flags().IntVar(&consumers, "consumers", runtime.NumCPU()*64, "The consumers to run")
cmd.Flags().StringVar(&queueID, "queue", "", "The queue to work on")
return cmd
}