Move async runner to runner file

api/runner/async_runner.go

@@ -0,0 +1,97 @@
+package runner
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	log "github.com/Sirupsen/logrus"
+
+	"github.com/iron-io/functions/api/models"
+)
+
+func RunAsyncRunners(mqAdr string) {
+
+	url := fmt.Sprintf("http://%s/tasks", mqAdr)
+
+	logAndWait := func(err error) {
+		log.WithError(err)
+		time.Sleep(1 * time.Second)
+	}
+
+	for {
+		resp, err := http.Get(url)
+		if err != nil {
+			logAndWait(err)
+			continue
+		}
+
+		body, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			logAndWait(err)
+			continue
+		}
+
+		var task models.Task
+
+		if err := json.Unmarshal(body, &task); err != nil {
+			logAndWait(err)
+			continue
+		}
+
+		if task.ID == "" {
+			time.Sleep(1 * time.Second)
+			continue
+		}
+
+		log.Info("Picked up task:", task.ID)
+		var stdout bytes.Buffer                                           // TODO: should limit the size of this, error if gets too big. akin to: https://golang.org/pkg/io/#LimitReader
+		stderr := NewFuncLogger(task.RouteName, "", *task.Image, task.ID) // TODO: missing path here, how do i get that?
+
+		if task.Timeout == nil {
+			timeout := int32(30)
+			task.Timeout = &timeout
+		}
+		cfg := &Config{
+			Image:   *task.Image,
+			Timeout: time.Duration(*task.Timeout) * time.Second,
+			ID:      task.ID,
+			AppName: task.RouteName,
+			Stdout:  &stdout,
+			Stderr:  stderr,
+			Env:     task.EnvVars,
+		}
+
+		metricLogger := NewMetricLogger()
+
+		rnr, err := New(metricLogger)
+		if err != nil {
+			log.WithError(err)
+			continue
+		}
+
+		ctx := context.Background()
+		if _, err = rnr.Run(ctx, cfg); err != nil {
+			log.WithError(err)
+			continue
+		}
+
+		log.Info("Processed task:", task.ID)
+		req, err := http.NewRequest(http.MethodDelete, url, bytes.NewBuffer(body))
+		if err != nil {
+			log.WithError(err)
+		}
+
+		c := &http.Client{}
+		if _, err := c.Do(req); err != nil {
+			log.WithError(err)
+			continue
+		}
+
+		log.Info("Deleted task:", task.ID)
+	}
+}