refactor(api,ssh,pkg): abstract internal client's asynq.Client

To support the new worker package, we are replacing the direct usage of
`asynq.Client` with the new `worker.Client` (#3979). The client
initialization process has also been updated to return an error if the
worker cannot be created.

api/go.mod

@@ -6,7 +6,6 @@ require (
 	github.com/cnf/structhash v0.0.0-20201127153200-e1b16c1ebc08
 	github.com/getsentry/sentry-go v0.28.1
 	github.com/golang-jwt/jwt/v4 v4.5.0
-	github.com/hibiken/asynq v0.24.1
 	github.com/labstack/echo/v4 v4.12.0
 	github.com/labstack/gommon v0.4.2
 	github.com/pkg/errors v0.9.1
@@ -58,6 +57,7 @@ require (
 	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/uuid v1.6.0 // indirect
+	github.com/hibiken/asynq v0.24.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/klauspost/compress v1.17.8 // indirect
 	github.com/klauspost/pgzip v1.2.5 // indirect

api/server.go

@@ -146,7 +146,11 @@ func startSentry(dsn string) (*sentry.Client, error) {
 func startServer(ctx context.Context, cfg *config, store store.Store, cache storecache.Cache) error {
 	log.Info("Starting API server")
 
-	requestClient := requests.NewClient()
+	requestClient, err := requests.NewClient()
+	if err != nil {
+		log.WithError(err).
+			Fatal("failed to create the internalclient")
+	}
 
 	servicesOptions := []services.Option{}
 
@@ -200,8 +204,7 @@ func startServer(ctx context.Context, cfg *config, store store.Store, cache stor
 		router.Close()
 	}()
 
-	err := router.Start(":8080") //nolint:errcheck
-
+	err = router.Start(":8080") //nolint:errcheck
 	log.WithError(err).Info("HTTP server closed")
 
 	return nil

pkg/api/internalclient/client.go

@@ -7,16 +7,10 @@ import (
 	"net/http"
 
 	resty "github.com/go-resty/resty/v2"
-	"github.com/hibiken/asynq"
+	"github.com/shellhub-io/shellhub/pkg/worker"
 	"github.com/sirupsen/logrus"
 )
 
-type client struct {
-	http   *resty.Client
-	logger *logrus.Logger
-	asynq  *asynq.Client
-}
-
 type Client interface {
 	deviceAPI
 	namespaceAPI
@@ -26,8 +20,11 @@ type Client interface {
 	firewallAPI
 }
 
-// Ensures the client implements Client.
-var _ Client = (*client)(nil)
+type client struct {
+	http   *resty.Client
+	logger *logrus.Logger
+	worker worker.Client
+}
 
 const (
 	DeviceUIDHeader = "X-Device-UID"
@@ -39,16 +36,7 @@ var (
 	ErrUnknown          = errors.New("unknown error")
 )
 
-// Options wraps injectable values to a new API internal client.
-// NOTE(r): This is a workaround to inject the Asynq client to the API internal client, because the [client] structure
-// and its properties are privated.
-type Options struct {
-	Asynq *asynq.Client
-}
-
-type Opt func(*Options) error
-
-func NewClient(opts ...Opt) Client {
+func NewClient(opts ...clientOption) (Client, error) {
 	httpClient := resty.New()
 	httpClient.SetBaseURL("http://api:8080")
 	httpClient.SetRetryCount(math.MaxInt32)
@@ -61,46 +49,15 @@ func NewClient(opts ...Opt) Client {
 	})
 
 	c := &client{http: httpClient}
-
-	o := new(Options)
 	for _, opt := range opts {
-		if err := opt(o); err != nil {
-			return nil
+		if err := opt(c); err != nil {
+			return nil, err
 		}
 	}
 
-	if o.Asynq != nil {
-		c.asynq = o.Asynq
-	}
-
 	if c.logger != nil {
 		httpClient.SetLogger(&LeveledLogger{c.logger})
 	}
 
-	return c
-}
-
-// NewClientWithAsynq creates a new API internal client with the Asynq client injected to turn the API internal client
-// able to enqueue ping tasks to the Asynq server and late process by API server.
-//
-// It uses the [NewClient] function to create a new API internal client and injects the Asynq client to it through the
-// [Options] structure.
-func NewClientWithAsynq(uri string) Client {
-	return NewClient(func(o *Options) error {
-		// The internal client used by the SSH server needs to be able to enqueue tasks to the Asynq server, due that,
-		// we must set the Asynq client to the internal client as a configuration function.
-		options, err := asynq.ParseRedisURI(uri)
-		if err != nil {
-			return err
-		}
-
-		client := asynq.NewClient(options)
-		if client == nil {
-			return errors.New("failed to create Asynq client")
-		}
-
-		o.Asynq = client
-
-		return nil
-	})
+	return c, nil
 }

pkg/api/internalclient/device.go

@@ -1,14 +1,15 @@
 package internalclient
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"net/http"
 
 	"github.com/go-resty/resty/v2"
-	"github.com/hibiken/asynq"
 	"github.com/shellhub-io/shellhub/pkg/clock"
 	"github.com/shellhub-io/shellhub/pkg/models"
+	"github.com/shellhub-io/shellhub/pkg/worker"
 )
 
 type deviceAPI interface {
@@ -45,10 +46,9 @@ func (c *client) DevicesOffline(uid string) error {
 }
 
 func (c *client) DevicesHeartbeat(tenant, uid string) error {
-	payload := []byte(fmt.Sprintf("%s:%s=%d", tenant, uid, clock.Now().Unix()))
-	_, err := c.asynq.Enqueue(asynq.NewTask("api:heartbeat", payload), asynq.Queue("api"), asynq.Group("api:heartbeat:batch"))
+	payload := fmt.Sprintf("%s:%s=%d", tenant, uid, clock.Now().Unix())
 
-	return err
+	return c.worker.SubmitToBatch(context.TODO(), worker.TaskPattern("api:heartbeat"), []byte(payload))
 }
 
 func (c *client) Lookup(lookup map[string]string) (string, []error) {

pkg/api/internalclient/option.go

@@ -0,0 +1,18 @@
+package internalclient
+
+import "github.com/shellhub-io/shellhub/pkg/worker/asynq"
+
+type clientOption func(c *client) error
+
+func WithAsynqWorker(redisURI string) clientOption { //nolint:revive
+	return func(c *client) error {
+		asynqClient, err := asynq.NewClient(redisURI)
+		if err != nil {
+			return err
+		}
+
+		c.worker = asynqClient
+
+		return nil
+	}
+}

ssh/go.mod

@@ -17,6 +17,7 @@ require (
 )
 
 require (
+	github.com/adhocore/gronx v1.8.1 // indirect
 	github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect