Refactor redis keys and store messages in protobuf

Changes:
- Task messages are stored under "asynq:{<qname>}:t:<task_id>" key in redis, value is a HASH type and message are stored under "msg" key in the hash. The hash also stores "deadline", "timeout".
- Redis LIST and ZSET stores task message IDs
- Task messages are serialized using protocol buffer

internal/base/base.go

@@ -6,6 +6,7 @@
 package base
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"sync"
@@ -174,10 +175,21 @@ type TaskMessage struct {
 func EncodeMessage(msg *TaskMessage) ([]byte, error) {
 	if msg == nil {
 		return nil, fmt.Errorf("cannot encode nil message")
+<<<<<<< HEAD
 	}
 	return proto.Marshal(&pb.TaskMessage{
 		Type:      msg.Type,
 		Payload:   msg.Payload,
+=======
+	}
+	payload, err := json.Marshal(msg.Payload)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Marshal(&pb.TaskMessage{
+		Type:      msg.Type,
+		Payload:   payload,
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 		Id:        msg.ID.String(),
 		Queue:     msg.Queue,
 		Retry:     int32(msg.Retry),
@@ -193,11 +205,22 @@ func EncodeMessage(msg *TaskMessage) ([]byte, error) {
 func DecodeMessage(data []byte) (*TaskMessage, error) {
 	var pbmsg pb.TaskMessage
 	if err := proto.Unmarshal(data, &pbmsg); err != nil {
+<<<<<<< HEAD
+=======
+		return nil, err
+	}
+	payload, err := decodePayload(pbmsg.GetPayload())
+	if err != nil {
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 		return nil, err
 	}
 	return &TaskMessage{
 		Type:      pbmsg.GetType(),
+<<<<<<< HEAD
 		Payload:   pbmsg.GetPayload(),
+=======
+		Payload:   payload,
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 		ID:        uuid.MustParse(pbmsg.GetId()),
 		Queue:     pbmsg.GetQueue(),
 		Retry:     int(pbmsg.GetRetry()),
@@ -350,7 +373,11 @@ type WorkerInfo struct {
 	ServerID string
 	ID       string
 	Type     string
+<<<<<<< HEAD
 	Payload  []byte
+=======
+	Payload  map[string]interface{}
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 	Queue    string
 	Started  time.Time
 	Deadline time.Time
@@ -361,6 +388,13 @@ func EncodeWorkerInfo(info *WorkerInfo) ([]byte, error) {
 	if info == nil {
 		return nil, fmt.Errorf("cannot encode nil worker info")
 	}
+<<<<<<< HEAD
+=======
+	payload, err := json.Marshal(info.Payload)
+	if err != nil {
+		return nil, err
+	}
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 	startTime, err := ptypes.TimestampProto(info.Started)
 	if err != nil {
 		return nil, err
@@ -375,19 +409,43 @@ func EncodeWorkerInfo(info *WorkerInfo) ([]byte, error) {
 		ServerId:    info.ServerID,
 		TaskId:      info.ID,
 		TaskType:    info.Type,
+<<<<<<< HEAD
 		TaskPayload: info.Payload,
+=======
+		TaskPayload: payload,
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 		Queue:       info.Queue,
 		StartTime:   startTime,
 		Deadline:    deadline,
 	})
 }
 
+<<<<<<< HEAD
+=======
+func decodePayload(b []byte) (map[string]interface{}, error) {
+	d := json.NewDecoder(bytes.NewReader(b))
+	d.UseNumber()
+	payload := make(map[string]interface{})
+	if err := d.Decode(&payload); err != nil {
+		return nil, err
+	}
+	return payload, nil
+}
+
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 // DecodeWorkerInfo decodes the given bytes into WorkerInfo.
 func DecodeWorkerInfo(b []byte) (*WorkerInfo, error) {
 	var pbmsg pb.WorkerInfo
 	if err := proto.Unmarshal(b, &pbmsg); err != nil {
 		return nil, err
 	}
+<<<<<<< HEAD
+=======
+	payload, err := decodePayload(pbmsg.GetTaskPayload())
+	if err != nil {
+		return nil, err
+	}
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 	startTime, err := ptypes.Timestamp(pbmsg.GetStartTime())
 	if err != nil {
 		return nil, err
@@ -402,7 +460,11 @@ func DecodeWorkerInfo(b []byte) (*WorkerInfo, error) {
 		ServerID: pbmsg.GetServerId(),
 		ID:       pbmsg.GetTaskId(),
 		Type:     pbmsg.GetTaskType(),
+<<<<<<< HEAD
 		Payload:  pbmsg.GetTaskPayload(),
+=======
+		Payload:  payload,
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 		Queue:    pbmsg.GetQueue(),
 		Started:  startTime,
 		Deadline: deadline,
@@ -439,6 +501,13 @@ func EncodeSchedulerEntry(entry *SchedulerEntry) ([]byte, error) {
 	if entry == nil {
 		return nil, fmt.Errorf("cannot encode nil scheduler entry")
 	}
+<<<<<<< HEAD
+=======
+	payload, err := json.Marshal(entry.Payload)
+	if err != nil {
+		return nil, err
+	}
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 	next, err := ptypes.TimestampProto(entry.Next)
 	if err != nil {
 		return nil, err
@@ -451,7 +520,11 @@ func EncodeSchedulerEntry(entry *SchedulerEntry) ([]byte, error) {
 		Id:              entry.ID,
 		Spec:            entry.Spec,
 		TaskType:        entry.Type,
+<<<<<<< HEAD
 		TaskPayload:     entry.Payload,
+=======
+		TaskPayload:     payload,
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 		EnqueueOptions:  entry.Opts,
 		NextEnqueueTime: next,
 		PrevEnqueueTime: prev,
@@ -464,6 +537,13 @@ func DecodeSchedulerEntry(b []byte) (*SchedulerEntry, error) {
 	if err := proto.Unmarshal(b, &pbmsg); err != nil {
 		return nil, err
 	}
+<<<<<<< HEAD
+=======
+	payload, err := decodePayload(pbmsg.GetTaskPayload())
+	if err != nil {
+		return nil, err
+	}
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 	next, err := ptypes.Timestamp(pbmsg.GetNextEnqueueTime())
 	if err != nil {
 		return nil, err
@@ -476,7 +556,11 @@ func DecodeSchedulerEntry(b []byte) (*SchedulerEntry, error) {
 		ID:      pbmsg.GetId(),
 		Spec:    pbmsg.GetSpec(),
 		Type:    pbmsg.GetTaskType(),
+<<<<<<< HEAD
 		Payload: pbmsg.GetTaskPayload(),
+=======
+		Payload: payload,
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 		Opts:    pbmsg.GetEnqueueOptions(),
 		Next:    next,
 		Prev:    prev,

internal/base/base_test.go

@@ -400,7 +400,11 @@ func TestServerInfoEncoding(t *testing.T) {
 				Concurrency:       10,
 				Queues:            map[string]int{"default": 1, "critical": 2},
 				StrictPriority:    false,
+<<<<<<< HEAD
 				Status:            "active",
+=======
+				Status:            "running",
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 				Started:           time.Now().Add(-3 * time.Hour),
 				ActiveWorkerCount: 8,
 			},
@@ -436,7 +440,11 @@ func TestWorkerInfoEncoding(t *testing.T) {
 				ServerID: "abc123",
 				ID:       uuid.NewString(),
 				Type:     "taskA",
+<<<<<<< HEAD
 				Payload:  toBytes(map[string]interface{}{"foo": "bar"}),
+=======
+				Payload:  map[string]interface{}{"foo": "bar"},
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 				Queue:    "default",
 				Started:  time.Now().Add(-3 * time.Hour),
 				Deadline: time.Now().Add(30 * time.Second),
@@ -471,7 +479,11 @@ func TestSchedulerEntryEncoding(t *testing.T) {
 				ID:      uuid.NewString(),
 				Spec:    "* * * * *",
 				Type:    "task_A",
+<<<<<<< HEAD
 				Payload: toBytes(map[string]interface{}{"foo": "bar"}),
+=======
+				Payload: map[string]interface{}{"foo": "bar"},
+>>>>>>> 138bd7f... Refactor redis keys and store messages in protobuf
 				Opts:    []string{"Queue('email')"},
 				Next:    time.Now().Add(30 * time.Second).UTC(),
 				Prev:    time.Now().Add(-2 * time.Minute).UTC(),