New JobQueue worker

backend/internal/jobqueue/models.go

@@ -0,0 +1,58 @@
+package jobqueue
+
+import (
+	"context"
+	"log"
+	"sync"
+)
+
+// Queue holds name, list of jobs and context with cancel.
+type Queue struct {
+	jobs   chan Job
+	ctx    context.Context
+	cancel context.CancelFunc
+}
+
+// Job - holds logic to perform some operations during queue execution.
+type Job struct {
+	Name   string
+	Action func() error // A function that should be executed when the job is running.
+}
+
+// AddJobs adds jobs to the queue and cancels channel.
+func (q *Queue) AddJobs(jobs []Job) {
+	var wg sync.WaitGroup
+	wg.Add(len(jobs))
+
+	for _, job := range jobs {
+		// Goroutine which adds job to the queue.
+		go func(job Job) {
+			q.AddJob(job)
+			wg.Done()
+		}(job)
+	}
+
+	go func() {
+		wg.Wait()
+		// Cancel queue channel, when all goroutines were done.
+		q.cancel()
+	}()
+}
+
+// AddJob sends job to the channel.
+func (q *Queue) AddJob(job Job) {
+	q.jobs <- job
+	log.Printf("New job %s added to queue", job.Name)
+}
+
+// Run performs job execution.
+func (j Job) Run() error {
+	log.Printf("Job running: %s", j.Name)
+
+	err := j.Action()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}