v0.15.0

* Delete scheduler history data when scheduler stops

* Fix history trimming bug

.github/workflows/benchstat.yml

@@ -0,0 +1,82 @@
+# This workflow runs benchmarks against the current branch,
+# compares them to benchmarks against master,
+# and uploads the results as an artifact.
+
+name: benchstat
+
+on: [pull_request]
+
+jobs:
+  incoming:
+    runs-on: ubuntu-latest
+    services:
+      redis:
+        image: redis
+        ports:
+          - 6379:6379
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.15.x
+      - name: Benchmark
+        run: go test -run=^$ -bench=. -count=5 -timeout=60m ./... | tee -a new.txt
+      - name: Upload Benchmark
+        uses: actions/upload-artifact@v2
+        with:
+          name: bench-incoming
+          path: new.txt
+
+  current:
+    runs-on: ubuntu-latest
+    services:
+      redis:
+        image: redis
+        ports:
+          - 6379:6379
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          ref: master
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.15.x
+      - name: Benchmark
+        run: go test -run=^$ -bench=. -count=5 -timeout=60m ./... | tee -a old.txt
+      - name: Upload Benchmark
+        uses: actions/upload-artifact@v2
+        with:
+          name: bench-current
+          path: old.txt
+
+  benchstat:
+    needs: [incoming, current]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.15.x
+      - name: Install benchstat
+        run: go get -u golang.org/x/perf/cmd/benchstat
+      - name: Download Incoming
+        uses: actions/download-artifact@v2
+        with:
+          name: bench-incoming
+      - name: Download Current
+        uses: actions/download-artifact@v2
+        with:
+          name: bench-current
+      - name: Benchstat Results
+        run: benchstat old.txt new.txt | tee -a benchstat.txt
+      - name: Upload benchstat results
+        uses: actions/upload-artifact@v2
+        with:
+          name: benchstat
+          path: benchstat.txt

.github/workflows/build.yml

@@ -0,0 +1,35 @@
+name: build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        go-version: [1.13.x, 1.14.x, 1.15.x]
+    runs-on: ${{ matrix.os }}
+    services:
+      redis:
+        image: redis
+        ports:
+          - 6379:6379
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Build
+        run: go build -v ./...
+
+      - name: Test
+        run: go test -race -v -coverprofile=coverage.txt -covermode=atomic ./...
+
+      - name: Benchmark Test
+        run: go test -run=^$ -bench=. -loglevel=debug ./...
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1

.travis.yml

@@ -1,13 +0,0 @@
-language: go
-go_import_path: github.com/hibiken/asynq
-git:
-  depth: 1
-go: [1.13.x, 1.14.x, 1.15.x]
-script:
-  - go test -race -v -coverprofile=coverage.txt -covermode=atomic ./...
-  - go test -run=^$ -bench=. -loglevel=debug ./...
-services:
-  - redis-server
-after_success:
-  - travis_wait 60 bash ./.travis/benchstat.sh
-  - bash <(curl -s https://codecov.io/bash)

.travis/benchstat.sh

@@ -1,20 +0,0 @@
-if [ "${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH}" != "master" ]; then
-    REMOTE_URL="$(git config --get remote.origin.url)";
-    cd ${TRAVIS_BUILD_DIR}/.. && \
-    git clone ${REMOTE_URL} "${TRAVIS_REPO_SLUG}-bench" && \
-    # turn the detached message off
-    git config --global advice.detachedHead false && \
-    cd "${TRAVIS_REPO_SLUG}-bench" && \
-
-    # Benchmark master
-    git checkout master && \
-    go test -run=^$ -bench=. -count=5 -timeout=60m -benchmem ./... > master.txt && \
-
-    # Benchmark feature branch
-    git checkout ${TRAVIS_COMMIT} && \
-    go test -run=^$ -bench=. -count=5 -timeout=60m -benchmem ./... > feature.txt && \
-
-    # compare two benchmarks
-    go get -u golang.org/x/perf/cmd/benchstat && \
-    benchstat master.txt feature.txt;
-fi

CHANGELOG.md

@@ -7,6 +7,31 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.15.0] - 2021-01-31
+
+**IMPORTATNT**: All `Inspector` related code are moved to subpackage "github.com/hibiken/asynq/inspeq"
+
+### Changed
+
+- `Inspector` related code are moved to subpackage "github.com/hibken/asynq/inspeq".
+- `RedisConnOpt` interface has changed slightly. If you have been passing `RedisClientOpt`, `RedisFailoverClientOpt`, or `RedisClusterClientOpt` as a pointer,
+   update your code to pass as a value.
+- `ErrorMsg` field in `RetryTask` and `ArchivedTask` was renamed to `LastError`.
+
+### Added
+
+- `MaxRetry`, `Retried`, `LastError` fields were added to all task types returned from `Inspector`.
+- `MemoryUsage` field was added to `QueueStats`.
+- `DeleteAllPendingTasks`, `ArchiveAllPendingTasks` were added to `Inspector`
+- `DeleteTaskByKey` and `ArchiveTaskByKey` now supports deleting/archiving `PendingTask`.
+- asynq CLI now supports deleting/archiving pending tasks.
+
+## [0.14.1] - 2021-01-19
+
+### Fixed
+
+- `go.mod` file for CLI
+
 ## [0.14.0] - 2021-01-14
 
 **IMPORTATNT**: Please run `asynq migrate` command to migrate from the previous versions.

README.md

@@ -1,6 +1,6 @@
 # Asynq
 
-[![Build Status](https://travis-ci.com/hibiken/asynq.svg?token=paqzfpSkF4p23s5Ux39b&branch=master)](https://travis-ci.com/hibiken/asynq)
+![Build Status](https://github.com/hibiken/asynq/workflows/build/badge.svg)
 [![GoDoc](https://godoc.org/github.com/hibiken/asynq?status.svg)](https://godoc.org/github.com/hibiken/asynq)
 [![Go Report Card](https://goreportcard.com/badge/github.com/hibiken/asynq)](https://goreportcard.com/report/github.com/hibiken/asynq)
 [![License: MIT](https://img.shields.io/badge/license-MIT-green.svg)](https://opensource.org/licenses/MIT)

asynq.go

@@ -40,7 +40,11 @@ func NewTask(typename string, payload map[string]interface{}) *Task {
 //   - RedisClientOpt
 //   - RedisFailoverClientOpt
 //   - RedisClusterClientOpt
-type RedisConnOpt interface{}
+type RedisConnOpt interface {
+	// MakeRedisClient returns a new redis client instance.
+	// Return value is intentionally opaque to hide the implementation detail of redis client.
+	MakeRedisClient() interface{}
+}
 
 // RedisClientOpt is used to create a redis client that connects
 // to a redis server directly.
@@ -73,6 +77,18 @@ type RedisClientOpt struct {
 	TLSConfig *tls.Config
 }
 
+func (opt RedisClientOpt) MakeRedisClient() interface{} {
+	return redis.NewClient(&redis.Options{
+		Network:   opt.Network,
+		Addr:      opt.Addr,
+		Username:  opt.Username,
+		Password:  opt.Password,
+		DB:        opt.DB,
+		PoolSize:  opt.PoolSize,
+		TLSConfig: opt.TLSConfig,
+	})
+}
+
 // RedisFailoverClientOpt is used to creates a redis client that talks
 // to redis sentinels for service discovery and has an automatic failover
 // capability.
@@ -109,6 +125,19 @@ type RedisFailoverClientOpt struct {
 	TLSConfig *tls.Config
 }
 
+func (opt RedisFailoverClientOpt) MakeRedisClient() interface{} {
+	return redis.NewFailoverClient(&redis.FailoverOptions{
+		MasterName:       opt.MasterName,
+		SentinelAddrs:    opt.SentinelAddrs,
+		SentinelPassword: opt.SentinelPassword,
+		Username:         opt.Username,
+		Password:         opt.Password,
+		DB:               opt.DB,
+		PoolSize:         opt.PoolSize,
+		TLSConfig:        opt.TLSConfig,
+	})
+}
+
 // RedisFailoverClientOpt is used to creates a redis client that connects to
 // redis cluster.
 type RedisClusterClientOpt struct {
@@ -133,6 +162,16 @@ type RedisClusterClientOpt struct {
 	TLSConfig *tls.Config
 }
 
+func (opt RedisClusterClientOpt) MakeRedisClient() interface{} {
+	return redis.NewClusterClient(&redis.ClusterOptions{
+		Addrs:        opt.Addrs,
+		MaxRedirects: opt.MaxRedirects,
+		Username:     opt.Username,
+		Password:     opt.Password,
+		TLSConfig:    opt.TLSConfig,
+	})
+}
+
 // ParseRedisURI parses redis uri string and returns RedisConnOpt if uri is valid.
 // It returns a non-nil error if uri cannot be parsed.
 //
@@ -205,71 +244,3 @@ func parseRedisSentinelURI(u *url.URL) (RedisConnOpt, error) {
 	}
 	return RedisFailoverClientOpt{MasterName: master, SentinelAddrs: addrs, Password: password}, nil
 }
-
-// createRedisClient returns a redis client given a redis connection configuration.
-//
-// Passing an unexpected type as a RedisConnOpt argument will cause panic.
-func createRedisClient(r RedisConnOpt) redis.UniversalClient {
-	switch r := r.(type) {
-	case *RedisClientOpt:
-		return redis.NewClient(&redis.Options{
-			Network:   r.Network,
-			Addr:      r.Addr,
-			Username:  r.Username,
-			Password:  r.Password,
-			DB:        r.DB,
-			PoolSize:  r.PoolSize,
-			TLSConfig: r.TLSConfig,
-		})
-	case RedisClientOpt:
-		return redis.NewClient(&redis.Options{
-			Network:   r.Network,
-			Addr:      r.Addr,
-			Username:  r.Username,
-			Password:  r.Password,
-			DB:        r.DB,
-			PoolSize:  r.PoolSize,
-			TLSConfig: r.TLSConfig,
-		})
-	case *RedisFailoverClientOpt:
-		return redis.NewFailoverClient(&redis.FailoverOptions{
-			MasterName:       r.MasterName,
-			SentinelAddrs:    r.SentinelAddrs,
-			SentinelPassword: r.SentinelPassword,
-			Username:         r.Username,
-			Password:         r.Password,
-			DB:               r.DB,
-			PoolSize:         r.PoolSize,
-			TLSConfig:        r.TLSConfig,
-		})
-	case RedisFailoverClientOpt:
-		return redis.NewFailoverClient(&redis.FailoverOptions{
-			MasterName:       r.MasterName,
-			SentinelAddrs:    r.SentinelAddrs,
-			SentinelPassword: r.SentinelPassword,
-			Username:         r.Username,
-			Password:         r.Password,
-			DB:               r.DB,
-			PoolSize:         r.PoolSize,
-			TLSConfig:        r.TLSConfig,
-		})
-	case RedisClusterClientOpt:
-		return redis.NewClusterClient(&redis.ClusterOptions{
-			Addrs:        r.Addrs,
-			MaxRedirects: r.MaxRedirects,
-			Username:     r.Username,
-			Password:     r.Password,
-			TLSConfig:    r.TLSConfig,
-		})
-	case *RedisClusterClientOpt:
-		return redis.NewClusterClient(&redis.ClusterOptions{
-			Addrs:        r.Addrs,
-			MaxRedirects: r.MaxRedirects,
-			Username:     r.Username,
-			Password:     r.Password,
-			TLSConfig:    r.TLSConfig,
-		})
-	default:
-		panic(fmt.Sprintf("asynq: unexpected type %T for RedisConnOpt", r))
-	}
-}

client.go

@@ -7,11 +7,11 @@ package asynq
 import (
 	"errors"
 	"fmt"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
 
+	"github.com/go-redis/redis/v7"
 	"github.com/google/uuid"
 	"github.com/hibiken/asynq/internal/base"
 	"github.com/hibiken/asynq/internal/rdb"
@@ -31,7 +31,11 @@ type Client struct {
 
 // NewClient returns a new Client instance given a redis connection option.
 func NewClient(r RedisConnOpt) *Client {
-	rdb := rdb.NewRDB(createRedisClient(r))
+	c, ok := r.MakeRedisClient().(redis.UniversalClient)
+	if !ok {
+		panic(fmt.Sprintf("asynq: unsupported RedisConnOpt type %T", r))
+	}
+	rdb := rdb.NewRDB(c)
 	return &Client{
 		opts: make(map[string][]Option),
 		rdb:  rdb,
@@ -172,73 +176,6 @@ func (d processInOption) String() string     { return fmt.Sprintf("ProcessIn(%v)
 func (d processInOption) Type() OptionType   { return ProcessInOpt }
 func (d processInOption) Value() interface{} { return time.Duration(d) }
 
-// parseOption interprets a string s as an Option and returns the Option if parsing is successful,
-// otherwise returns non-nil error.
-func parseOption(s string) (Option, error) {
-	fn, arg := parseOptionFunc(s), parseOptionArg(s)
-	switch fn {
-	case "Queue":
-		qname, err := strconv.Unquote(arg)
-		if err != nil {
-			return nil, err
-		}
-		return Queue(qname), nil
-	case "MaxRetry":
-		n, err := strconv.Atoi(arg)
-		if err != nil {
-			return nil, err
-		}
-		return MaxRetry(n), nil
-	case "Timeout":
-		d, err := time.ParseDuration(arg)
-		if err != nil {
-			return nil, err
-		}
-		return Timeout(d), nil
-	case "Deadline":
-		t, err := time.Parse(time.UnixDate, arg)
-		if err != nil {
-			return nil, err
-		}
-		return Deadline(t), nil
-	case "Unique":
-		d, err := time.ParseDuration(arg)
-		if err != nil {
-			return nil, err
-		}
-		return Unique(d), nil
-	case "ProcessAt":
-		t, err := time.Parse(time.UnixDate, arg)
-		if err != nil {
-			return nil, err
-		}
-		return ProcessAt(t), nil
-	case "ProcessIn":
-		d, err := time.ParseDuration(arg)
-		if err != nil {
-			return nil, err
-		}
-		return ProcessIn(d), nil
-	default:
-		return nil, fmt.Errorf("cannot not parse option string %q", s)
-	}
-}
-
-func parseOptionFunc(s string) string {
-	i := strings.Index(s, "(")
-	return s[:i]
-}
-
-func parseOptionArg(s string) string {
-	i := strings.Index(s, "(")
-	if i >= 0 {
-		j := strings.Index(s, ")")
-		if j > i {
-			return s[i+1 : j]
-		}
-	}
-	return ""
-}
 
 // ErrDuplicateTask indicates that the given task could not be enqueued since it's a duplicate of another task.
 //
@@ -272,7 +209,7 @@ func composeOptions(opts ...Option) (option, error) {
 			res.retry = int(opt)
 		case queueOption:
 			trimmed := strings.TrimSpace(string(opt))
-			if err := validateQueueName(trimmed); err != nil {
+			if err := base.ValidateQueueName(trimmed); err != nil {
 				return option{}, err
 			}
 			res.queue = trimmed
@@ -293,13 +230,6 @@ func composeOptions(opts ...Option) (option, error) {
 	return res, nil
 }
 
-func validateQueueName(qname string) error {
-	if len(qname) == 0 {
-		return fmt.Errorf("queue name must contain one or more characters")
-	}
-	return nil
-}
-
 const (
 	// Default max retry count used if nothing is specified.
 	defaultMaxRetry = 25

client_test.go

@@ -775,70 +775,3 @@ func TestClientEnqueueUniqueWithProcessAtOption(t *testing.T) {
 	}
 }
 
-func TestParseOption(t *testing.T) {
-	oneHourFromNow := time.Now().Add(1 * time.Hour)
-	tests := []struct {
-		s        string
-		wantType OptionType
-		wantVal  interface{}
-	}{
-		{`MaxRetry(10)`, MaxRetryOpt, 10},
-		{`Queue("email")`, QueueOpt, "email"},
-		{`Timeout(3m)`, TimeoutOpt, 3 * time.Minute},
-		{Deadline(oneHourFromNow).String(), DeadlineOpt, oneHourFromNow},
-		{`Unique(1h)`, UniqueOpt, 1 * time.Hour},
-		{ProcessAt(oneHourFromNow).String(), ProcessAtOpt, oneHourFromNow},
-		{`ProcessIn(10m)`, ProcessInOpt, 10 * time.Minute},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.s, func(t *testing.T) {
-			got, err := parseOption(tc.s)
-			if err != nil {
-				t.Fatalf("returned error: %v", err)
-			}
-			if got == nil {
-				t.Fatal("returned nil")
-			}
-			if got.Type() != tc.wantType {
-				t.Fatalf("got type %v, want type %v ", got.Type(), tc.wantType)
-			}
-			switch tc.wantType {
-			case QueueOpt:
-				gotVal, ok := got.Value().(string)
-				if !ok {
-					t.Fatal("returned Option with non-string value")
-				}
-				if gotVal != tc.wantVal.(string) {
-					t.Fatalf("got value %v, want %v", gotVal, tc.wantVal)
-				}
-			case MaxRetryOpt:
-				gotVal, ok := got.Value().(int)
-				if !ok {
-					t.Fatal("returned Option with non-int value")
-				}
-				if gotVal != tc.wantVal.(int) {
-					t.Fatalf("got value %v, want %v", gotVal, tc.wantVal)
-				}
-			case TimeoutOpt, UniqueOpt, ProcessInOpt:
-				gotVal, ok := got.Value().(time.Duration)
-				if !ok {
-					t.Fatal("returned Option with non duration value")
-				}
-				if gotVal != tc.wantVal.(time.Duration) {
-					t.Fatalf("got value %v, want %v", gotVal, tc.wantVal)
-				}
-			case DeadlineOpt, ProcessAtOpt:
-				gotVal, ok := got.Value().(time.Time)
-				if !ok {
-					t.Fatal("returned Option with non time value")
-				}
-				if cmp.Equal(gotVal, tc.wantVal.(time.Time)) {
-					t.Fatalf("got value %v, want %v", gotVal, tc.wantVal)
-				}
-			default:
-				t.Fatalf("returned Option with unexpected type: %v", got.Type())
-			}
-		})
-	}
-}

heartbeat.go

@@ -38,13 +38,13 @@ type heartbeater struct {
 	// heartbeater goroutine. In other words, confine these variables
 	// to this goroutine only.
 	started time.Time
-	workers map[string]workerStat
+	workers map[string]*workerInfo
 
 	// status is shared with other goroutine but is concurrency safe.
 	status *base.ServerStatus
 
 	// channels to receive updates on active workers.
-	starting <-chan *base.TaskMessage
+	starting <-chan *workerInfo
 	finished <-chan *base.TaskMessage
 }
 
@@ -56,7 +56,7 @@ type heartbeaterParams struct {
 	queues         map[string]int
 	strictPriority bool
 	status         *base.ServerStatus
-	starting       <-chan *base.TaskMessage
+	starting       <-chan *workerInfo
 	finished       <-chan *base.TaskMessage
 }
 
@@ -80,7 +80,7 @@ func newHeartbeater(params heartbeaterParams) *heartbeater {
 		strictPriority: params.strictPriority,
 
 		status:   params.status,
-		workers:  make(map[string]workerStat),
+		workers:  make(map[string]*workerInfo),
 		starting: params.starting,
 		finished: params.finished,
 	}
@@ -92,11 +92,14 @@ func (h *heartbeater) terminate() {
 	h.done <- struct{}{}
 }
 
-// A workerStat records the message a worker is working on
-// and the time the worker has started processing the message.
-type workerStat struct {
+// A workerInfo holds an active worker information.
+type workerInfo struct {
+	// the task message the worker is processing.
+	msg *base.TaskMessage
+	// the time the worker has started processing the message.
 	started time.Time
-	msg     *base.TaskMessage
+	// deadline the worker has to finish processing the task by.
+	deadline time.Time
 }
 
 func (h *heartbeater) start(wg *sync.WaitGroup) {
@@ -121,8 +124,8 @@ func (h *heartbeater) start(wg *sync.WaitGroup) {
 				h.beat()
 				timer.Reset(h.interval)
 
-			case msg := <-h.starting:
-				h.workers[msg.ID.String()] = workerStat{time.Now(), msg}
+			case w := <-h.starting:
+				h.workers[w.msg.ID.String()] = w
 
 			case msg := <-h.finished:
 				delete(h.workers, msg.ID.String())
@@ -145,16 +148,17 @@ func (h *heartbeater) beat() {
 	}
 
 	var ws []*base.WorkerInfo
-	for id, stat := range h.workers {
+	for id, w := range h.workers {
 		ws = append(ws, &base.WorkerInfo{
 			Host:     h.host,
 			PID:      h.pid,
 			ServerID: h.serverID,
 			ID:       id,
-			Type:     stat.msg.Type,
-			Queue:    stat.msg.Queue,
-			Payload:  stat.msg.Payload,
-			Started:  stat.started,
+			Type:     w.msg.Type,
+			Queue:    w.msg.Queue,
+			Payload:  w.msg.Payload,
+			Started:  w.started,
+			Deadline: w.deadline,
 		})
 	}
 

heartbeat_test.go

@@ -47,7 +47,7 @@ func TestHeartbeater(t *testing.T) {
 			queues:         tc.queues,
 			strictPriority: false,
 			status:         status,
-			starting:       make(chan *base.TaskMessage),
+			starting:       make(chan *workerInfo),
 			finished:       make(chan *base.TaskMessage),
 		})
 
@@ -139,7 +139,7 @@ func TestHeartbeaterWithRedisDown(t *testing.T) {
 		queues:         map[string]int{"default": 1},
 		strictPriority: false,
 		status:         base.NewServerStatus(base.StatusRunning),
-		starting:       make(chan *base.TaskMessage),
+		starting:       make(chan *workerInfo),
 		finished:       make(chan *base.TaskMessage),
 	})
 

inspeq/doc.go

@@ -0,0 +1,22 @@
+// Copyright 2020 Kentaro Hibino. All rights reserved.
+// Use of this source code is governed by a MIT license
+// that can be found in the LICENSE file.
+
+/*
+Package inspeq provides helper types and functions to inspect queues and tasks managed by Asynq.
+
+Inspector is used to query and mutate the state of queues and tasks.
+
+Example:
+
+    inspector := inspeq.New(asynq.RedisClientOpt{Addr: "localhost:6379"})
+
+    tasks, err := inspector.ListArchivedTasks("my-queue")
+
+    for _, t := range tasks {
+        if err := inspector.DeleteTaskByKey(t.Key()); err != nil {
+            // handle error
+        }
+    }
+*/
+package inspeq

inspeq/inspector.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a MIT license
 // that can be found in the LICENSE file.
 
-package asynq
+package inspeq
 
 import (
 	"fmt"
@@ -10,7 +10,10 @@ import (
 	"strings"
 	"time"
 
+	"github.com/go-redis/redis/v7"
 	"github.com/google/uuid"
+	"github.com/hibiken/asynq"
+	"github.com/hibiken/asynq/internal/base"
 	"github.com/hibiken/asynq/internal/rdb"
 )
 
@@ -20,10 +23,14 @@ type Inspector struct {
 	rdb *rdb.RDB
 }
 
-// NewInspector returns a new instance of Inspector.
-func NewInspector(r RedisConnOpt) *Inspector {
+// New returns a new instance of Inspector.
+func New(r asynq.RedisConnOpt) *Inspector {
+	c, ok := r.MakeRedisClient().(redis.UniversalClient)
+	if !ok {
+		panic(fmt.Sprintf("inspeq: unsupported RedisConnOpt type %T", r))
+	}
 	return &Inspector{
-		rdb: rdb.NewRDB(createRedisClient(r)),
+		rdb: rdb.NewRDB(c),
 	}
 }
 
@@ -41,6 +48,8 @@ func (i *Inspector) Queues() ([]string, error) {
 type QueueStats struct {
 	// Name of the queue.
 	Queue string
+	// Total number of bytes that the queue and its tasks require to be stored in redis.
+	MemoryUsage int64
 	// Size is the total number of tasks in the queue.
 	// The value is the sum of Pending, Active, Scheduled, Retry, and Archived.
 	Size int
@@ -68,7 +77,7 @@ type QueueStats struct {
 
 // CurrentStats returns a current stats of the given queue.
 func (i *Inspector) CurrentStats(qname string) (*QueueStats, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return nil, err
 	}
 	stats, err := i.rdb.CurrentStats(qname)
@@ -76,17 +85,18 @@ func (i *Inspector) CurrentStats(qname string) (*QueueStats, error) {
 		return nil, err
 	}
 	return &QueueStats{
-		Queue:     stats.Queue,
-		Size:      stats.Size,
-		Pending:   stats.Pending,
-		Active:    stats.Active,
-		Scheduled: stats.Scheduled,
-		Retry:     stats.Retry,
-		Archived:  stats.Archived,
-		Processed: stats.Processed,
-		Failed:    stats.Failed,
-		Paused:    stats.Paused,
-		Timestamp: stats.Timestamp,
+		Queue:       stats.Queue,
+		MemoryUsage: stats.MemoryUsage,
+		Size:        stats.Size,
+		Pending:     stats.Pending,
+		Active:      stats.Active,
+		Scheduled:   stats.Scheduled,
+		Retry:       stats.Retry,
+		Archived:    stats.Archived,
+		Processed:   stats.Processed,
+		Failed:      stats.Failed,
+		Paused:      stats.Paused,
+		Timestamp:   stats.Timestamp,
 	}, nil
 }
 
@@ -105,7 +115,7 @@ type DailyStats struct {
 
 // History returns a list of stats from the last n days.
 func (i *Inspector) History(qname string, n int) ([]*DailyStats, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return nil, err
 	}
 	stats, err := i.rdb.HistoricalStats(qname, n)
@@ -165,23 +175,32 @@ func (i *Inspector) DeleteQueue(qname string, force bool) error {
 
 // PendingTask is a task in a queue and is ready to be processed.
 type PendingTask struct {
-	*Task
-	ID    string
-	Queue string
+	*asynq.Task
+	ID        string
+	Queue     string
+	MaxRetry  int
+	Retried   int
+	LastError string
 }
 
 // ActiveTask is a task that's currently being processed.
 type ActiveTask struct {
-	*Task
-	ID    string
-	Queue string
+	*asynq.Task
+	ID        string
+	Queue     string
+	MaxRetry  int
+	Retried   int
+	LastError string
 }
 
 // ScheduledTask is a task scheduled to be processed in the future.
 type ScheduledTask struct {
-	*Task
+	*asynq.Task
 	ID            string
 	Queue         string
+	MaxRetry      int
+	Retried       int
+	LastError     string
 	NextProcessAt time.Time
 
 	score int64
@@ -189,13 +208,13 @@ type ScheduledTask struct {
 
 // RetryTask is a task scheduled to be retried in the future.
 type RetryTask struct {
-	*Task
+	*asynq.Task
 	ID            string
 	Queue         string
 	NextProcessAt time.Time
 	MaxRetry      int
 	Retried       int
-	ErrorMsg      string
+	LastError     string
 	// TODO: LastFailedAt  time.Time
 
 	score int64
@@ -206,52 +225,73 @@ type RetryTask struct {
 // A task can be archived when the task exhausts its retry counts or manually
 // archived by a user via the CLI or Inspector.
 type ArchivedTask struct {
-	*Task
+	*asynq.Task
 	ID           string
 	Queue        string
 	MaxRetry     int
 	Retried      int
 	LastFailedAt time.Time
-	ErrorMsg     string
+	LastError    string
 
 	score int64
 }
 
-// Key returns a key used to delete, run, and archive the task.
+// Format string used for task key.
+// Format is <prefix>:<uuid>:<score>.
+const taskKeyFormat = "%s:%v:%v"
+
+// Prefix used for task key.
+const (
+	keyPrefixPending   = "p"
+	keyPrefixScheduled = "s"
+	keyPrefixRetry     = "r"
+	keyPrefixArchived  = "a"
+
+	allKeyPrefixes = keyPrefixPending + keyPrefixScheduled + keyPrefixRetry + keyPrefixArchived
+)
+
+// Key returns a key used to delete, and archive the pending task.
+func (t *PendingTask) Key() string {
+	// Note: Pending tasks are stored in redis LIST, therefore no score.
+	// Use zero for the score to use the same key format.
+	return fmt.Sprintf(taskKeyFormat, keyPrefixPending, t.ID, 0)
+}
+
+// Key returns a key used to delete, run, and archive the scheduled task.
 func (t *ScheduledTask) Key() string {
-	return fmt.Sprintf("s:%v:%v", t.ID, t.score)
+	return fmt.Sprintf(taskKeyFormat, keyPrefixScheduled, t.ID, t.score)
 }
 
-// Key returns a key used to delete, run, and archive the task.
+// Key returns a key used to delete, run, and archive the retry task.
 func (t *RetryTask) Key() string {
-	return fmt.Sprintf("r:%v:%v", t.ID, t.score)
+	return fmt.Sprintf(taskKeyFormat, keyPrefixRetry, t.ID, t.score)
 }
 
-// Key returns a key used to delete, run, and archive the task.
+// Key returns a key used to delete and run the archived task.
 func (t *ArchivedTask) Key() string {
-	return fmt.Sprintf("a:%v:%v", t.ID, t.score)
+	return fmt.Sprintf(taskKeyFormat, keyPrefixArchived, t.ID, t.score)
 }
 
 // parseTaskKey parses a key string and returns each part of key with proper
 // type if valid, otherwise it reports an error.
-func parseTaskKey(key string) (id uuid.UUID, score int64, state string, err error) {
+func parseTaskKey(key string) (prefix string, id uuid.UUID, score int64, err error) {
 	parts := strings.Split(key, ":")
 	if len(parts) != 3 {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
 	id, err = uuid.Parse(parts[1])
 	if err != nil {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
 	score, err = strconv.ParseInt(parts[2], 10, 64)
 	if err != nil {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
-	state = parts[0]
-	if len(state) != 1 || !strings.Contains("sra", state) {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+	prefix = parts[0]
+	if len(prefix) != 1 || !strings.Contains(allKeyPrefixes, prefix) {
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
-	return id, score, state, nil
+	return prefix, id, score, nil
 }
 
 // ListOption specifies behavior of list operation.
@@ -319,7 +359,7 @@ func Page(n int) ListOption {
 //
 // By default, it retrieves the first 30 tasks.
 func (i *Inspector) ListPendingTasks(qname string, opts ...ListOption) ([]*PendingTask, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return nil, err
 	}
 	opt := composeListOptions(opts...)
@@ -331,9 +371,12 @@ func (i *Inspector) ListPendingTasks(qname string, opts ...ListOption) ([]*Pendi
 	var tasks []*PendingTask
 	for _, m := range msgs {
 		tasks = append(tasks, &PendingTask{
-			Task:  NewTask(m.Type, m.Payload),
-			ID:    m.ID.String(),
-			Queue: m.Queue,
+			Task:      asynq.NewTask(m.Type, m.Payload),
+			ID:        m.ID.String(),
+			Queue:     m.Queue,
+			MaxRetry:  m.Retry,
+			Retried:   m.Retried,
+			LastError: m.ErrorMsg,
 		})
 	}
 	return tasks, err
@@ -343,7 +386,7 @@ func (i *Inspector) ListPendingTasks(qname string, opts ...ListOption) ([]*Pendi
 //
 // By default, it retrieves the first 30 tasks.
 func (i *Inspector) ListActiveTasks(qname string, opts ...ListOption) ([]*ActiveTask, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return nil, err
 	}
 	opt := composeListOptions(opts...)
@@ -354,10 +397,14 @@ func (i *Inspector) ListActiveTasks(qname string, opts ...ListOption) ([]*Active
 	}
 	var tasks []*ActiveTask
 	for _, m := range msgs {
+
 		tasks = append(tasks, &ActiveTask{
-			Task:  NewTask(m.Type, m.Payload),
-			ID:    m.ID.String(),
-			Queue: m.Queue,
+			Task:      asynq.NewTask(m.Type, m.Payload),
+			ID:        m.ID.String(),
+			Queue:     m.Queue,
+			MaxRetry:  m.Retry,
+			Retried:   m.Retried,
+			LastError: m.ErrorMsg,
 		})
 	}
 	return tasks, err
@@ -368,7 +415,7 @@ func (i *Inspector) ListActiveTasks(qname string, opts ...ListOption) ([]*Active
 //
 // By default, it retrieves the first 30 tasks.
 func (i *Inspector) ListScheduledTasks(qname string, opts ...ListOption) ([]*ScheduledTask, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return nil, err
 	}
 	opt := composeListOptions(opts...)
@@ -380,11 +427,14 @@ func (i *Inspector) ListScheduledTasks(qname string, opts ...ListOption) ([]*Sch
 	var tasks []*ScheduledTask
 	for _, z := range zs {
 		processAt := time.Unix(z.Score, 0)
-		t := NewTask(z.Message.Type, z.Message.Payload)
+		t := asynq.NewTask(z.Message.Type, z.Message.Payload)
 		tasks = append(tasks, &ScheduledTask{
 			Task:          t,
 			ID:            z.Message.ID.String(),
 			Queue:         z.Message.Queue,
+			MaxRetry:      z.Message.Retry,
+			Retried:       z.Message.Retried,
+			LastError:     z.Message.ErrorMsg,
 			NextProcessAt: processAt,
 			score:         z.Score,
 		})
@@ -397,7 +447,7 @@ func (i *Inspector) ListScheduledTasks(qname string, opts ...ListOption) ([]*Sch
 //
 // By default, it retrieves the first 30 tasks.
 func (i *Inspector) ListRetryTasks(qname string, opts ...ListOption) ([]*RetryTask, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return nil, err
 	}
 	opt := composeListOptions(opts...)
@@ -409,7 +459,7 @@ func (i *Inspector) ListRetryTasks(qname string, opts ...ListOption) ([]*RetryTa
 	var tasks []*RetryTask
 	for _, z := range zs {
 		processAt := time.Unix(z.Score, 0)
-		t := NewTask(z.Message.Type, z.Message.Payload)
+		t := asynq.NewTask(z.Message.Type, z.Message.Payload)
 		tasks = append(tasks, &RetryTask{
 			Task:          t,
 			ID:            z.Message.ID.String(),
@@ -418,8 +468,8 @@ func (i *Inspector) ListRetryTasks(qname string, opts ...ListOption) ([]*RetryTa
 			MaxRetry:      z.Message.Retry,
 			Retried:       z.Message.Retried,
 			// TODO: LastFailedAt: z.Message.LastFailedAt
-			ErrorMsg: z.Message.ErrorMsg,
-			score:    z.Score,
+			LastError: z.Message.ErrorMsg,
+			score:     z.Score,
 		})
 	}
 	return tasks, nil
@@ -430,7 +480,7 @@ func (i *Inspector) ListRetryTasks(qname string, opts ...ListOption) ([]*RetryTa
 //
 // By default, it retrieves the first 30 tasks.
 func (i *Inspector) ListArchivedTasks(qname string, opts ...ListOption) ([]*ArchivedTask, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return nil, err
 	}
 	opt := composeListOptions(opts...)
@@ -442,7 +492,7 @@ func (i *Inspector) ListArchivedTasks(qname string, opts ...ListOption) ([]*Arch
 	var tasks []*ArchivedTask
 	for _, z := range zs {
 		failedAt := time.Unix(z.Score, 0)
-		t := NewTask(z.Message.Type, z.Message.Payload)
+		t := asynq.NewTask(z.Message.Type, z.Message.Payload)
 		tasks = append(tasks, &ArchivedTask{
 			Task:         t,
 			ID:           z.Message.ID.String(),
@@ -450,17 +500,27 @@ func (i *Inspector) ListArchivedTasks(qname string, opts ...ListOption) ([]*Arch
 			MaxRetry:     z.Message.Retry,
 			Retried:      z.Message.Retried,
 			LastFailedAt: failedAt,
-			ErrorMsg:     z.Message.ErrorMsg,
+			LastError:    z.Message.ErrorMsg,
 			score:        z.Score,
 		})
 	}
 	return tasks, nil
 }
 
+// DeleteAllPendingTasks deletes all pending tasks from the specified queue,
+// and reports the number tasks deleted.
+func (i *Inspector) DeleteAllPendingTasks(qname string) (int, error) {
+	if err := base.ValidateQueueName(qname); err != nil {
+		return 0, err
+	}
+	n, err := i.rdb.DeleteAllPendingTasks(qname)
+	return int(n), err
+}
+
 // DeleteAllScheduledTasks deletes all scheduled tasks from the specified queue,
 // and reports the number tasks deleted.
 func (i *Inspector) DeleteAllScheduledTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.DeleteAllScheduledTasks(qname)
@@ -470,7 +530,7 @@ func (i *Inspector) DeleteAllScheduledTasks(qname string) (int, error) {
 // DeleteAllRetryTasks deletes all retry tasks from the specified queue,
 // and reports the number tasks deleted.
 func (i *Inspector) DeleteAllRetryTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.DeleteAllRetryTasks(qname)
@@ -480,7 +540,7 @@ func (i *Inspector) DeleteAllRetryTasks(qname string) (int, error) {
 // DeleteAllArchivedTasks deletes all archived tasks from the specified queue,
 // and reports the number tasks deleted.
 func (i *Inspector) DeleteAllArchivedTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.DeleteAllArchivedTasks(qname)
@@ -489,49 +549,51 @@ func (i *Inspector) DeleteAllArchivedTasks(qname string) (int, error) {
 
 // DeleteTaskByKey deletes a task with the given key from the given queue.
 func (i *Inspector) DeleteTaskByKey(qname, key string) error {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return err
 	}
-	id, score, state, err := parseTaskKey(key)
+	prefix, id, score, err := parseTaskKey(key)
 	if err != nil {
 		return err
 	}
-	switch state {
-	case "s":
+	switch prefix {
+	case keyPrefixPending:
+		return i.rdb.DeletePendingTask(qname, id)
+	case keyPrefixScheduled:
 		return i.rdb.DeleteScheduledTask(qname, id, score)
-	case "r":
+	case keyPrefixRetry:
 		return i.rdb.DeleteRetryTask(qname, id, score)
-	case "a":
+	case keyPrefixArchived:
 		return i.rdb.DeleteArchivedTask(qname, id, score)
 	default:
 		return fmt.Errorf("invalid key")
 	}
 }
 
-// RunAllScheduledTasks transition all scheduled tasks to pending state within the given queue,
+// RunAllScheduledTasks transition all scheduled tasks to pending state from the given queue,
 // and reports the number of tasks transitioned.
 func (i *Inspector) RunAllScheduledTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.RunAllScheduledTasks(qname)
 	return int(n), err
 }
 
-// RunAllRetryTasks transition all retry tasks to pending state within the given queue,
+// RunAllRetryTasks transition all retry tasks to pending state from the given queue,
 // and reports the number of tasks transitioned.
 func (i *Inspector) RunAllRetryTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.RunAllRetryTasks(qname)
 	return int(n), err
 }
 
-// RunAllArchivedTasks transition all archived tasks to pending state within the given queue,
+// RunAllArchivedTasks transition all archived tasks to pending state from the given queue,
 // and reports the number of tasks transitioned.
 func (i *Inspector) RunAllArchivedTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.RunAllArchivedTasks(qname)
@@ -540,39 +602,51 @@ func (i *Inspector) RunAllArchivedTasks(qname string) (int, error) {
 
 // RunTaskByKey transition a task to pending state given task key and queue name.
 func (i *Inspector) RunTaskByKey(qname, key string) error {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return err
 	}
-	id, score, state, err := parseTaskKey(key)
+	prefix, id, score, err := parseTaskKey(key)
 	if err != nil {
 		return err
 	}
-	switch state {
-	case "s":
+	switch prefix {
+	case keyPrefixScheduled:
 		return i.rdb.RunScheduledTask(qname, id, score)
-	case "r":
+	case keyPrefixRetry:
 		return i.rdb.RunRetryTask(qname, id, score)
-	case "a":
+	case keyPrefixArchived:
 		return i.rdb.RunArchivedTask(qname, id, score)
+	case keyPrefixPending:
+		return fmt.Errorf("task is already pending for run")
 	default:
 		return fmt.Errorf("invalid key")
 	}
 }
 
-// ArchiveAllScheduledTasks archives all scheduled tasks within the given queue,
+// ArchiveAllPendingTasks archives all pending tasks from the given queue,
+// and reports the number of tasks archived.
+func (i *Inspector) ArchiveAllPendingTasks(qname string) (int, error) {
+	if err := base.ValidateQueueName(qname); err != nil {
+		return 0, err
+	}
+	n, err := i.rdb.ArchiveAllPendingTasks(qname)
+	return int(n), err
+}
+
+// ArchiveAllScheduledTasks archives all scheduled tasks from the given queue,
 // and reports the number of tasks archiveed.
 func (i *Inspector) ArchiveAllScheduledTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.ArchiveAllScheduledTasks(qname)
 	return int(n), err
 }
 
-// ArchiveAllRetryTasks archives all retry tasks within the given queue,
+// ArchiveAllRetryTasks archives all retry tasks from the given queue,
 // and reports the number of tasks archiveed.
 func (i *Inspector) ArchiveAllRetryTasks(qname string) (int, error) {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return 0, err
 	}
 	n, err := i.rdb.ArchiveAllRetryTasks(qname)
@@ -581,20 +655,22 @@ func (i *Inspector) ArchiveAllRetryTasks(qname string) (int, error) {
 
 // ArchiveTaskByKey archives a task with the given key in the given queue.
 func (i *Inspector) ArchiveTaskByKey(qname, key string) error {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return err
 	}
-	id, score, state, err := parseTaskKey(key)
+	prefix, id, score, err := parseTaskKey(key)
 	if err != nil {
 		return err
 	}
-	switch state {
-	case "s":
+	switch prefix {
+	case keyPrefixPending:
+		return i.rdb.ArchivePendingTask(qname, id)
+	case keyPrefixScheduled:
 		return i.rdb.ArchiveScheduledTask(qname, id, score)
-	case "r":
+	case keyPrefixRetry:
 		return i.rdb.ArchiveRetryTask(qname, id, score)
-	case "a":
-		return fmt.Errorf("task already archived")
+	case keyPrefixArchived:
+		return fmt.Errorf("task is already archived")
 	default:
 		return fmt.Errorf("invalid key")
 	}
@@ -611,7 +687,7 @@ func (i *Inspector) CancelActiveTask(id string) error {
 // PauseQueue pauses task processing on the specified queue.
 // If the queue is already paused, it will return a non-nil error.
 func (i *Inspector) PauseQueue(qname string) error {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return err
 	}
 	return i.rdb.Pause(qname)
@@ -620,7 +696,7 @@ func (i *Inspector) PauseQueue(qname string) error {
 // UnpauseQueue resumes task processing on the specified queue.
 // If the queue is not paused, it will return a non-nil error.
 func (i *Inspector) UnpauseQueue(qname string) error {
-	if err := validateQueueName(qname); err != nil {
+	if err := base.ValidateQueueName(qname); err != nil {
 		return err
 	}
 	return i.rdb.Unpause(qname)
@@ -656,9 +732,10 @@ func (i *Inspector) Servers() ([]*ServerInfo, error) {
 			continue
 		}
 		wrkInfo := &WorkerInfo{
-			Started: w.Started,
+			Started:  w.Started,
+			Deadline: w.Deadline,
 			Task: &ActiveTask{
-				Task:  NewTask(w.Type, w.Payload),
+				Task:  asynq.NewTask(w.Type, w.Payload),
 				ID:    w.ID,
 				Queue: w.Queue,
 			},
@@ -702,6 +779,8 @@ type WorkerInfo struct {
 	Task *ActiveTask
 	// Time the worker started processing the task.
 	Started time.Time
+	// Time the worker needs to finish processing the task by.
+	Deadline time.Time
 }
 
 // ClusterKeySlot returns an integer identifying the hash slot the given queue hashes to.
@@ -740,10 +819,10 @@ type SchedulerEntry struct {
 	Spec string
 
 	// Periodic Task registered for this entry.
-	Task *Task
+	Task *asynq.Task
 
 	// Opts is the options for the periodic task.
-	Opts []Option
+	Opts []asynq.Option
 
 	// Next shows the next time the task will be enqueued.
 	Next time.Time
@@ -762,8 +841,8 @@ func (i *Inspector) SchedulerEntries() ([]*SchedulerEntry, error) {
 		return nil, err
 	}
 	for _, e := range res {
-		task := NewTask(e.Type, e.Payload)
-		var opts []Option
+		task := asynq.NewTask(e.Type, e.Payload)
+		var opts []asynq.Option
 		for _, s := range e.Opts {
 			if o, err := parseOption(s); err == nil {
 				// ignore bad data
@@ -782,6 +861,74 @@ func (i *Inspector) SchedulerEntries() ([]*SchedulerEntry, error) {
 	return entries, nil
 }
 
+// parseOption interprets a string s as an Option and returns the Option if parsing is successful,
+// otherwise returns non-nil error.
+func parseOption(s string) (asynq.Option, error) {
+	fn, arg := parseOptionFunc(s), parseOptionArg(s)
+	switch fn {
+	case "Queue":
+		qname, err := strconv.Unquote(arg)
+		if err != nil {
+			return nil, err
+		}
+		return asynq.Queue(qname), nil
+	case "MaxRetry":
+		n, err := strconv.Atoi(arg)
+		if err != nil {
+			return nil, err
+		}
+		return asynq.MaxRetry(n), nil
+	case "Timeout":
+		d, err := time.ParseDuration(arg)
+		if err != nil {
+			return nil, err
+		}
+		return asynq.Timeout(d), nil
+	case "Deadline":
+		t, err := time.Parse(time.UnixDate, arg)
+		if err != nil {
+			return nil, err
+		}
+		return asynq.Deadline(t), nil
+	case "Unique":
+		d, err := time.ParseDuration(arg)
+		if err != nil {
+			return nil, err
+		}
+		return asynq.Unique(d), nil
+	case "ProcessAt":
+		t, err := time.Parse(time.UnixDate, arg)
+		if err != nil {
+			return nil, err
+		}
+		return asynq.ProcessAt(t), nil
+	case "ProcessIn":
+		d, err := time.ParseDuration(arg)
+		if err != nil {
+			return nil, err
+		}
+		return asynq.ProcessIn(d), nil
+	default:
+		return nil, fmt.Errorf("cannot not parse option string %q", s)
+	}
+}
+
+func parseOptionFunc(s string) string {
+	i := strings.Index(s, "(")
+	return s[:i]
+}
+
+func parseOptionArg(s string) string {
+	i := strings.Index(s, "(")
+	if i >= 0 {
+		j := strings.Index(s, ")")
+		if j > i {
+			return s[i+1 : j]
+		}
+	}
+	return ""
+}
+
 // SchedulerEnqueueEvent holds information about an enqueue event by a scheduler.
 type SchedulerEnqueueEvent struct {
 	// ID of the task that was enqueued.

internal/base/base.go

@@ -19,7 +19,7 @@ import (
 )
 
 // Version of asynq library and CLI.
-const Version = "0.14.0"
+const Version = "0.15.0"
 
 // DefaultQueueName is the queue name used if none are specified by user.
 const DefaultQueueName = "default"
@@ -36,6 +36,15 @@ const (
 	CancelChannel = "asynq:cancel"     // PubSub channel
 )
 
+// ValidateQueueName validates a given qname to be used as a queue name.
+// Returns nil if valid, otherwise returns non-nil error.
+func ValidateQueueName(qname string) error {
+	if len(qname) == 0 {
+		return fmt.Errorf("queue name must contain one or more characters")
+	}
+	return nil
+}
+
 // QueueKey returns a redis key for the given queue name.
 func QueueKey(qname string) string {
 	return fmt.Sprintf("asynq:{%s}", qname)
@@ -283,6 +292,7 @@ type WorkerInfo struct {
 	Queue    string
 	Payload  map[string]interface{}
 	Started  time.Time
+	Deadline time.Time
 }
 
 // SchedulerEntry holds information about a periodic task registered with a scheduler.

internal/rdb/inspect.go

@@ -25,6 +25,9 @@ func (r *RDB) AllQueues() ([]string, error) {
 type Stats struct {
 	// Name of the queue (e.g. "default", "critical").
 	Queue string
+	// MemoryUsage is the total number of bytes the queue and its tasks require
+	// to be stored in redis.
+	MemoryUsage int64
 	// Paused indicates whether the queue is paused.
 	// If true, tasks in the queue should not be processed.
 	Paused bool
@@ -160,9 +163,30 @@ func (r *RDB) CurrentStats(qname string) (*Stats, error) {
 		}
 	}
 	stats.Size = size
+	memusg, err := r.memoryUsage(qname)
+	if err != nil {
+		return nil, err
+	}
+	stats.MemoryUsage = memusg
 	return stats, nil
 }
 
+func (r *RDB) memoryUsage(qname string) (int64, error) {
+	keys, err := r.client.Keys(fmt.Sprintf("asynq:{%s}*", qname)).Result()
+	if err != nil {
+		return 0, err
+	}
+	var usg int64
+	for _, k := range keys {
+		n, err := r.client.MemoryUsage(k).Result()
+		if err != nil {
+			return 0, err
+		}
+		usg += n
+	}
+	return usg, nil
+}
+
 var historicalStatsCmd = redis.NewScript(`
 local res = {}
 for _, key in ipairs(KEYS) do
@@ -488,6 +512,66 @@ func (r *RDB) ArchiveScheduledTask(qname string, id uuid.UUID, score int64) erro
 	return nil
 }
 
+// KEYS[1] -> asynq:{<qname>}
+// KEYS[2] -> asynq:{<qname>}:archived
+// ARGV[1] -> task message to archive
+// ARGV[2] -> current timestamp
+// ARGV[3] -> cutoff timestamp (e.g., 90 days ago)
+// ARGV[4] -> max number of tasks in archive (e.g., 100)
+var archivePendingCmd = redis.NewScript(`
+local x = redis.call("LREM", KEYS[1], 1, ARGV[1])
+if x == 0 then
+	return 0
+end
+redis.call("ZADD", KEYS[2], ARGV[2], ARGV[1])
+redis.call("ZREMRANGEBYSCORE", KEYS[2], "-inf", ARGV[3])
+redis.call("ZREMRANGEBYRANK", KEYS[2], 0, -ARGV[4])
+return 1
+`)
+
+func (r *RDB) archivePending(qname, msg string) (int64, error) {
+	keys := []string{base.QueueKey(qname), base.ArchivedKey(qname)}
+	now := time.Now()
+	limit := now.AddDate(0, 0, -archivedExpirationInDays).Unix() // 90 days ago
+	args := []interface{}{msg, now.Unix(), limit, maxArchiveSize}
+	res, err := archivePendingCmd.Run(r.client, keys, args...).Result()
+	if err != nil {
+		return 0, err
+	}
+	n, ok := res.(int64)
+	if !ok {
+		return 0, fmt.Errorf("could not cast %v to int64", res)
+	}
+	return n, nil
+}
+
+// ArchivePendingTask finds a pending task that matches the given id  from the given queue
+// and archives it. If a task that maches the id does not exist, it returns ErrTaskNotFound.
+func (r *RDB) ArchivePendingTask(qname string, id uuid.UUID) error {
+	qkey := base.QueueKey(qname)
+	data, err := r.client.LRange(qkey, 0, -1).Result()
+	if err != nil {
+		return err
+	}
+	for _, s := range data {
+		msg, err := base.DecodeMessage(s)
+		if err != nil {
+			return err
+		}
+		if msg.ID == id {
+			n, err := r.archivePending(qname, s)
+			if err != nil {
+				return err
+			}
+			if n == 0 {
+				return ErrTaskNotFound
+			}
+			return nil
+		}
+	}
+	return ErrTaskNotFound
+}
+
 // ArchiveAllRetryTasks archives all retry tasks from the given queue and
 // returns the number of tasks that were moved.
 func (r *RDB) ArchiveAllRetryTasks(qname string) (int64, error) {
@@ -500,6 +584,39 @@ func (r *RDB) ArchiveAllScheduledTasks(qname string) (int64, error) {
 	return r.removeAndArchiveAll(base.ScheduledKey(qname), base.ArchivedKey(qname))
 }
 
+// KEYS[1] -> asynq:{<qname>}
+// KEYS[2] -> asynq:{<qname>}:archived
+// ARGV[1] -> current timestamp
+// ARGV[2] -> cutoff timestamp (e.g., 90 days ago)
+// ARGV[3] -> max number of tasks in archive (e.g., 100)
+var archiveAllPendingCmd = redis.NewScript(`
+local msgs = redis.call("LRANGE", KEYS[1], 0, -1)
+for _, msg in ipairs(msgs) do
+	redis.call("ZADD", KEYS[2], ARGV[1], msg)
+	redis.call("ZREMRANGEBYSCORE", KEYS[2], "-inf", ARGV[2])
+	redis.call("ZREMRANGEBYRANK", KEYS[2], 0, -ARGV[3])
+end
+redis.call("DEL", KEYS[1])
+return table.getn(msgs)`)
+
+// ArchiveAllPendingTasks archives all pending tasks from the given queue and
+// returns the number of tasks that were moved.
+func (r *RDB) ArchiveAllPendingTasks(qname string) (int64, error) {
+	keys := []string{base.QueueKey(qname), base.ArchivedKey(qname)}
+	now := time.Now()
+	limit := now.AddDate(0, 0, -archivedExpirationInDays).Unix() // 90 days ago
+	args := []interface{}{now.Unix(), limit, maxArchiveSize}
+	res, err := archiveAllPendingCmd.Run(r.client, keys, args...).Result()
+	if err != nil {
+		return 0, err
+	}
+	n, ok := res.(int64)
+	if !ok {
+		return 0, fmt.Errorf("could not cast %v to int64", res)
+	}
+	return n, nil
+}
+
 // KEYS[1] -> ZSET to move task from (e.g., retry queue)
 // KEYS[2] -> asynq:{<qname>}:archived
 // ARGV[1] -> score of the task to archive
@@ -585,6 +702,33 @@ func (r *RDB) DeleteScheduledTask(qname string, id uuid.UUID, score int64) error
 	return r.deleteTask(base.ScheduledKey(qname), id.String(), float64(score))
 }
 
+// DeletePendingTask deletes a pending tasks that matches the given id from the given queue.
+// If a task that matches the id does not exist, it returns ErrTaskNotFound.
+func (r *RDB) DeletePendingTask(qname string, id uuid.UUID) error {
+	qkey := base.QueueKey(qname)
+	data, err := r.client.LRange(qkey, 0, -1).Result()
+	if err != nil {
+		return err
+	}
+	for _, s := range data {
+		msg, err := base.DecodeMessage(s)
+		if err != nil {
+			return err
+		}
+		if msg.ID == id {
+			n, err := r.client.LRem(qkey, 1, s).Result()
+			if err != nil {
+				return err
+			}
+			if n == 0 {
+				return ErrTaskNotFound
+			}
+			return nil
+		}
+	}
+	return ErrTaskNotFound
+}
+
 var deleteTaskCmd = redis.NewScript(`
 local msgs = redis.call("ZRANGEBYSCORE", KEYS[1], ARGV[1], ARGV[1])
 for _, msg in ipairs(msgs) do
@@ -647,6 +791,26 @@ func (r *RDB) deleteAll(key string) (int64, error) {
 	return n, nil
 }
 
+// KEYS[1] -> asynq:{<qname>}
+var deleteAllPendingCmd = redis.NewScript(`
+local n = redis.call("LLEN", KEYS[1])
+redis.call("DEL", KEYS[1])
+return n`)
+
+// DeleteAllPendingTasks deletes all pending tasks from the given queue
+// and returns the number of tasks deleted.
+func (r *RDB) DeleteAllPendingTasks(qname string) (int64, error) {
+	res, err := deleteAllPendingCmd.Run(r.client, []string{base.QueueKey(qname)}).Result()
+	if err != nil {
+		return 0, err
+	}
+	n, ok := res.(int64)
+	if !ok {
+		return 0, fmt.Errorf("could not cast %v to int64", res)
+	}
+	return n, nil
+}
+
 // ErrQueueNotFound indicates specified queue does not exist.
 type ErrQueueNotFound struct {
 	qname string
@@ -741,9 +905,8 @@ func (r *RDB) RemoveQueue(qname string, force bool) error {
 	if err := script.Run(r.client, keys).Err(); err != nil {
 		if err.Error() == "QUEUE NOT EMPTY" {
 			return &ErrQueueNotEmpty{qname}
-		} else {
-			return err
 		}
+		return err
 	}
 	return r.client.SRem(base.AllQueues, qname).Err()
 }
@@ -811,7 +974,6 @@ func (r *RDB) ListWorkers() ([]*base.WorkerInfo, error) {
 				continue // skip bad data
 			}
 			workers = append(workers, &w)
-
 		}
 	}
 	return workers, nil

internal/rdb/inspect_test.go

@@ -209,7 +209,8 @@ func TestCurrentStats(t *testing.T) {
 			continue
 		}
 
-		if diff := cmp.Diff(tc.want, got, timeCmpOpt); diff != "" {
+		ignoreMemUsg := cmpopts.IgnoreFields(Stats{}, "MemoryUsage")
+		if diff := cmp.Diff(tc.want, got, timeCmpOpt, ignoreMemUsg); diff != "" {
 			t.Errorf("r.CurrentStats(%q) = %v, %v, want %v, nil; (-want, +got)\n%s", tc.qname, got, err, tc.want, diff)
 			continue
 		}
@@ -2965,6 +2966,7 @@ func TestListWorkers(t *testing.T) {
 					Queue:    m1.Queue,
 					Payload:  m1.Payload,
 					Started:  time.Now().Add(-1 * time.Second),
+					Deadline: time.Now().Add(30 * time.Second),
 				},
 				{
 					Host:     host,
@@ -2975,6 +2977,7 @@ func TestListWorkers(t *testing.T) {
 					Queue:    m2.Queue,
 					Payload:  m2.Payload,
 					Started:  time.Now().Add(-5 * time.Second),
+					Deadline: time.Now().Add(10 * time.Minute),
 				},
 				{
 					Host:     host,
@@ -2985,6 +2988,7 @@ func TestListWorkers(t *testing.T) {
 					Queue:    m3.Queue,
 					Payload:  m3.Payload,
 					Started:  time.Now().Add(-30 * time.Second),
+					Deadline: time.Now().Add(30 * time.Minute),
 				},
 			},
 		},
@@ -3017,7 +3021,7 @@ func TestWriteListClearSchedulerEntries(t *testing.T) {
 	schedulerID := "127.0.0.1:9876:abc123"
 
 	data := []*base.SchedulerEntry{
-		&base.SchedulerEntry{
+		{
 			Spec:    "* * * * *",
 			Type:    "foo",
 			Payload: nil,
@@ -3025,7 +3029,7 @@ func TestWriteListClearSchedulerEntries(t *testing.T) {
 			Next:    now.Add(5 * time.Hour),
 			Prev:    now.Add(-2 * time.Hour),
 		},
-		&base.SchedulerEntry{
+		{
 			Spec:    "@every 20m",
 			Type:    "bar",
 			Payload: map[string]interface{}{"fiz": "baz"},
@@ -3067,12 +3071,6 @@ func TestSchedulerEnqueueEvents(t *testing.T) {
 		oneHourAgo   = now.Add(-1 * time.Hour)
 	)
 
-	type event struct {
-		entryID    string
-		taskID     string
-		enqueuedAt time.Time
-	}
-
 	tests := []struct {
 		entryID string
 		events  []*base.SchedulerEnqueueEvent
@@ -3121,6 +3119,53 @@ loop:
 	}
 }
 
+func TestRecordSchedulerEnqueueEventTrimsDataSet(t *testing.T) {
+	r := setup(t)
+	var (
+		entryID = "entry123"
+		now     = time.Now()
+		key     = base.SchedulerHistoryKey(entryID)
+	)
+
+	// Record maximum number of events.
+	for i := 1; i <= maxEvents; i++ {
+		event := base.SchedulerEnqueueEvent{
+			TaskID:     fmt.Sprintf("task%d", i),
+			EnqueuedAt: now.Add(-time.Duration(i) * time.Second),
+		}
+		if err := r.RecordSchedulerEnqueueEvent(entryID, &event); err != nil {
+			t.Fatalf("RecordSchedulerEnqueueEvent failed: %v", err)
+		}
+	}
+
+	// Make sure the set is full.
+	if n := r.client.ZCard(key).Val(); n != maxEvents {
+		t.Fatalf("unexpected number of events; got %d, want %d", n, maxEvents)
+	}
+
+	// Record one more event, should evict the oldest event.
+	event := base.SchedulerEnqueueEvent{
+		TaskID:     "latest",
+		EnqueuedAt: now,
+	}
+	if err := r.RecordSchedulerEnqueueEvent(entryID, &event); err != nil {
+		t.Fatalf("RecordSchedulerEnqueueEvent failed: %v", err)
+	}
+	if n := r.client.ZCard(key).Val(); n != maxEvents {
+		t.Fatalf("unexpected number of events; got %d, want %d", n, maxEvents)
+	}
+	events, err := r.ListSchedulerEnqueueEvents(entryID, Pagination{Size: maxEvents})
+	if err != nil {
+		t.Fatalf("ListSchedulerEnqueueEvents failed: %v", err)
+	}
+	if first := events[0]; first.TaskID != "latest" {
+		t.Errorf("unexpected first event; got %q, want %q", first.TaskID, "latest")
+	}
+	if last := events[maxEvents-1]; last.TaskID != fmt.Sprintf("task%d", maxEvents-1) {
+		t.Errorf("unexpected last event; got %q, want %q", last.TaskID, fmt.Sprintf("task%d", maxEvents-1))
+	}
+}
+
 func TestPause(t *testing.T) {
 	r := setup(t)
 

internal/rdb/rdb.go

@@ -634,12 +634,12 @@ func (r *RDB) PublishCancelation(id string) error {
 // ARGV[2] -> serialized SchedulerEnqueueEvent data
 // ARGV[3] -> max number of events to be persisted
 var recordSchedulerEnqueueEventCmd = redis.NewScript(`
+redis.call("ZREMRANGEBYRANK", KEYS[1], 0, -ARGV[3])
 redis.call("ZADD", KEYS[1], ARGV[1], ARGV[2])
-redis.call("ZREMRANGEBYSCORE", KEYS[1], "-inf", ARGV[3])
 return redis.status_reply("OK")`)
 
 // Maximum number of enqueue events to store per entry.
-const maxEvents = 10000
+const maxEvents = 1000
 
 // RecordSchedulerEnqueueEvent records the time when the given task was enqueued.
 func (r *RDB) RecordSchedulerEnqueueEvent(entryID string, event *base.SchedulerEnqueueEvent) error {
@@ -651,3 +651,9 @@ func (r *RDB) RecordSchedulerEnqueueEvent(entryID string, event *base.SchedulerE
 	return recordSchedulerEnqueueEventCmd.Run(
 		r.client, []string{key}, event.EnqueuedAt.Unix(), data, maxEvents).Err()
 }
+
+// ClearSchedulerHistory deletes the enqueue event history for the given scheduler entry.
+func (r *RDB) ClearSchedulerHistory(entryID string) error {
+	key := base.SchedulerHistoryKey(entryID)
+	return r.client.Del(key).Err()
+}

processor.go

@@ -63,7 +63,7 @@ type processor struct {
 	// cancelations is a set of cancel functions for all active tasks.
 	cancelations *base.Cancelations
 
-	starting chan<- *base.TaskMessage
+	starting chan<- *workerInfo
 	finished chan<- *base.TaskMessage
 }
 
@@ -78,7 +78,7 @@ type processorParams struct {
 	strictPriority  bool
 	errHandler      ErrorHandler
 	shutdownTimeout time.Duration
-	starting        chan<- *base.TaskMessage
+	starting        chan<- *workerInfo
 	finished        chan<- *base.TaskMessage
 }
 
@@ -180,7 +180,7 @@ func (p *processor) exec() {
 			return
 		}
 
-		p.starting <- msg
+		p.starting <- &workerInfo{msg, time.Now(), deadline}
 		go func() {
 			defer func() {
 				p.finished <- msg

processor_test.go

@@ -20,7 +20,7 @@ import (
 )
 
 // fakeHeartbeater receives from starting and finished channels and do nothing.
-func fakeHeartbeater(starting, finished <-chan *base.TaskMessage, done <-chan struct{}) {
+func fakeHeartbeater(starting <-chan *workerInfo, finished <-chan *base.TaskMessage, done <-chan struct{}) {
 	for {
 		select {
 		case <-starting:
@@ -86,7 +86,7 @@ func TestProcessorSuccessWithSingleQueue(t *testing.T) {
 			processed = append(processed, task)
 			return nil
 		}
-		starting := make(chan *base.TaskMessage)
+		starting := make(chan *workerInfo)
 		finished := make(chan *base.TaskMessage)
 		syncCh := make(chan *syncRequest)
 		done := make(chan struct{})
@@ -177,7 +177,7 @@ func TestProcessorSuccessWithMultipleQueues(t *testing.T) {
 			processed = append(processed, task)
 			return nil
 		}
-		starting := make(chan *base.TaskMessage)
+		starting := make(chan *workerInfo)
 		finished := make(chan *base.TaskMessage)
 		syncCh := make(chan *syncRequest)
 		done := make(chan struct{})
@@ -258,7 +258,7 @@ func TestProcessTasksWithLargeNumberInPayload(t *testing.T) {
 			processed = append(processed, task)
 			return nil
 		}
-		starting := make(chan *base.TaskMessage)
+		starting := make(chan *workerInfo)
 		finished := make(chan *base.TaskMessage)
 		syncCh := make(chan *syncRequest)
 		done := make(chan struct{})
@@ -389,7 +389,7 @@ func TestProcessorRetry(t *testing.T) {
 			defer mu.Unlock()
 			n++
 		}
-		starting := make(chan *base.TaskMessage)
+		starting := make(chan *workerInfo)
 		finished := make(chan *base.TaskMessage)
 		done := make(chan struct{})
 		defer func() { close(done) }()
@@ -470,7 +470,7 @@ func TestProcessorQueues(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		starting := make(chan *base.TaskMessage)
+		starting := make(chan *workerInfo)
 		finished := make(chan *base.TaskMessage)
 		done := make(chan struct{})
 		defer func() { close(done) }()
@@ -559,7 +559,7 @@ func TestProcessorWithStrictPriority(t *testing.T) {
 			"critical":            3,
 			"low":                 1,
 		}
-		starting := make(chan *base.TaskMessage)
+		starting := make(chan *workerInfo)
 		finished := make(chan *base.TaskMessage)
 		syncCh := make(chan *syncRequest)
 		done := make(chan struct{})

scheduler.go

@@ -10,6 +10,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/go-redis/redis/v7"
 	"github.com/google/uuid"
 	"github.com/hibiken/asynq/internal/base"
 	"github.com/hibiken/asynq/internal/log"
@@ -34,6 +35,10 @@ type Scheduler struct {
 // NewScheduler returns a new Scheduler instance given the redis connection option.
 // The parameter opts is optional, defaults will be used if opts is set to nil
 func NewScheduler(r RedisConnOpt, opts *SchedulerOpts) *Scheduler {
+	c, ok := r.MakeRedisClient().(redis.UniversalClient)
+	if !ok {
+		panic(fmt.Sprintf("asynq: unsupported RedisConnOpt type %T", r))
+	}
 	if opts == nil {
 		opts = &SchedulerOpts{}
 	}
@@ -55,7 +60,7 @@ func NewScheduler(r RedisConnOpt, opts *SchedulerOpts) *Scheduler {
 		status:     base.NewServerStatus(base.StatusIdle),
 		logger:     logger,
 		client:     NewClient(r),
-		rdb:        rdb.NewRDB(createRedisClient(r)),
+		rdb:        rdb.NewRDB(c),
 		cron:       cron.New(cron.WithLocation(loc)),
 		location:   loc,
 		done:       make(chan struct{}),
@@ -186,6 +191,7 @@ func (s *Scheduler) Stop() error {
 	<-ctx.Done()
 	s.wg.Wait()
 
+	s.clearHistory()
 	s.client.Close()
 	s.rdb.Close()
 	s.status.Set(base.StatusStopped)
@@ -237,3 +243,12 @@ func stringifyOptions(opts []Option) []string {
 	}
 	return res
 }
+
+func (s *Scheduler) clearHistory() {
+	for _, entry := range s.cron.Entries() {
+		job := entry.Job.(*enqueueJob)
+		if err := s.rdb.ClearSchedulerHistory(job.id.String()); err != nil {
+			s.logger.Warnf("Could not clear scheduler history for entry %q: %v", job.id.String(), err)
+		}
+	}
+}

server.go

@@ -15,6 +15,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/go-redis/redis/v7"
 	"github.com/hibiken/asynq/internal/base"
 	"github.com/hibiken/asynq/internal/log"
 	"github.com/hibiken/asynq/internal/rdb"
@@ -279,6 +280,10 @@ const (
 // NewServer returns a new Server given a redis connection option
 // and background processing configuration.
 func NewServer(r RedisConnOpt, cfg Config) *Server {
+	c, ok := r.MakeRedisClient().(redis.UniversalClient)
+	if !ok {
+		panic(fmt.Sprintf("asynq: unsupported RedisConnOpt type %T", r))
+	}
 	n := cfg.Concurrency
 	if n < 1 {
 		n = runtime.NumCPU()
@@ -315,8 +320,8 @@ func NewServer(r RedisConnOpt, cfg Config) *Server {
 	}
 	logger.SetLevel(toInternalLogLevel(loglevel))
 
-	rdb := rdb.NewRDB(createRedisClient(r))
-	starting := make(chan *base.TaskMessage)
+	rdb := rdb.NewRDB(c)
+	starting := make(chan *workerInfo)
 	finished := make(chan *base.TaskMessage)
 	syncCh := make(chan *syncRequest)
 	status := base.NewServerStatus(base.StatusIdle)

tools/asynq/cmd/cron.go

@@ -11,7 +11,7 @@ import (
 	"sort"
 	"time"
 
-	"github.com/hibiken/asynq"
+	"github.com/hibiken/asynq/inspeq"
 	"github.com/spf13/cobra"
 )
 
@@ -108,7 +108,7 @@ func cronHistory(cmd *cobra.Command, args []string) {
 		fmt.Printf("Entry: %s\n\n", entryID)
 
 		events, err := inspector.ListSchedulerEnqueueEvents(
-			entryID, asynq.PageSize(pageSize), asynq.Page(pageNum))
+			entryID, inspeq.PageSize(pageSize), inspeq.Page(pageNum))
 		if err != nil {
 			fmt.Printf("error: %v\n", err)
 			continue

tools/asynq/cmd/queue.go

@@ -10,7 +10,7 @@ import (
 	"os"
 
 	"github.com/fatih/color"
-	"github.com/hibiken/asynq"
+	"github.com/hibiken/asynq/inspeq"
 	"github.com/hibiken/asynq/internal/rdb"
 	"github.com/spf13/cobra"
 )
@@ -82,7 +82,7 @@ func queueList(cmd *cobra.Command, args []string) {
 	type queueInfo struct {
 		name    string
 		keyslot int64
-		nodes   []asynq.ClusterNode
+		nodes   []inspeq.ClusterNode
 	}
 	inspector := createInspector()
 	queues, err := inspector.Queues()
@@ -141,7 +141,7 @@ func queueInspect(cmd *cobra.Command, args []string) {
 	}
 }
 
-func printQueueStats(s *asynq.QueueStats) {
+func printQueueStats(s *inspeq.QueueStats) {
 	bold := color.New(color.Bold)
 	bold.Println("Queue Info")
 	fmt.Printf("Name:   %s\n", s.Queue)
@@ -191,7 +191,7 @@ func queueHistory(cmd *cobra.Command, args []string) {
 	}
 }
 
-func printDailyStats(stats []*asynq.DailyStats) {
+func printDailyStats(stats []*inspeq.DailyStats) {
 	printTable(
 		[]string{"date (UTC)", "processed", "failed", "error rate"},
 		func(w io.Writer, tmpl string) {

tools/asynq/cmd/root.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/go-redis/redis/v7"
 	"github.com/hibiken/asynq"
+	"github.com/hibiken/asynq/inspeq"
 	"github.com/hibiken/asynq/internal/base"
 	"github.com/hibiken/asynq/internal/rdb"
 	"github.com/spf13/cobra"
@@ -135,7 +136,7 @@ func createRDB() *rdb.RDB {
 }
 
 // createRDB creates a Inspector instance using flag values and returns it.
-func createInspector() *asynq.Inspector {
+func createInspector() *inspeq.Inspector {
 	var connOpt asynq.RedisConnOpt
 	if useRedisCluster {
 		addrs := strings.Split(viper.GetString("cluster_addrs"), ",")
@@ -152,7 +153,7 @@ func createInspector() *asynq.Inspector {
 			TLSConfig: getTLSConfig(),
 		}
 	}
-	return asynq.NewInspector(connOpt)
+	return inspeq.New(connOpt)
 }
 
 func getTLSConfig() *tls.Config {

tools/asynq/cmd/task.go

@@ -10,7 +10,7 @@ import (
 	"os"
 	"time"
 
-	"github.com/hibiken/asynq"
+	"github.com/hibiken/asynq/inspeq"
 	"github.com/spf13/cobra"
 )
 
@@ -104,7 +104,7 @@ var taskArchiveCmd = &cobra.Command{
 	Use:   "archive --queue=QUEUE --key=KEY",
 	Short: "Archive a task with the given key",
 	Args:  cobra.NoArgs,
-	Run:   taskKill,
+	Run:   taskArchive,
 }
 
 var taskDeleteCmd = &cobra.Command{
@@ -183,7 +183,7 @@ func taskList(cmd *cobra.Command, args []string) {
 
 func listActiveTasks(qname string, pageNum, pageSize int) {
 	i := createInspector()
-	tasks, err := i.ListActiveTasks(qname, asynq.PageSize(pageSize), asynq.Page(pageNum))
+	tasks, err := i.ListActiveTasks(qname, inspeq.PageSize(pageSize), inspeq.Page(pageNum))
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -204,7 +204,7 @@ func listActiveTasks(qname string, pageNum, pageSize int) {
 
 func listPendingTasks(qname string, pageNum, pageSize int) {
 	i := createInspector()
-	tasks, err := i.ListPendingTasks(qname, asynq.PageSize(pageSize), asynq.Page(pageNum))
+	tasks, err := i.ListPendingTasks(qname, inspeq.PageSize(pageSize), inspeq.Page(pageNum))
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -214,10 +214,10 @@ func listPendingTasks(qname string, pageNum, pageSize int) {
 		return
 	}
 	printTable(
-		[]string{"ID", "Type", "Payload"},
+		[]string{"Key", "Type", "Payload"},
 		func(w io.Writer, tmpl string) {
 			for _, t := range tasks {
-				fmt.Fprintf(w, tmpl, t.ID, t.Type, t.Payload)
+				fmt.Fprintf(w, tmpl, t.Key(), t.Type, t.Payload)
 			}
 		},
 	)
@@ -225,7 +225,7 @@ func listPendingTasks(qname string, pageNum, pageSize int) {
 
 func listScheduledTasks(qname string, pageNum, pageSize int) {
 	i := createInspector()
-	tasks, err := i.ListScheduledTasks(qname, asynq.PageSize(pageSize), asynq.Page(pageNum))
+	tasks, err := i.ListScheduledTasks(qname, inspeq.PageSize(pageSize), inspeq.Page(pageNum))
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -248,7 +248,7 @@ func listScheduledTasks(qname string, pageNum, pageSize int) {
 
 func listRetryTasks(qname string, pageNum, pageSize int) {
 	i := createInspector()
-	tasks, err := i.ListRetryTasks(qname, asynq.PageSize(pageSize), asynq.Page(pageNum))
+	tasks, err := i.ListRetryTasks(qname, inspeq.PageSize(pageSize), inspeq.Page(pageNum))
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -267,7 +267,7 @@ func listRetryTasks(qname string, pageNum, pageSize int) {
 				} else {
 					nextRetry = "right now"
 				}
-				fmt.Fprintf(w, tmpl, t.Key(), t.Type, t.Payload, nextRetry, t.ErrorMsg, t.Retried, t.MaxRetry)
+				fmt.Fprintf(w, tmpl, t.Key(), t.Type, t.Payload, nextRetry, t.LastError, t.Retried, t.MaxRetry)
 			}
 		},
 	)
@@ -275,7 +275,7 @@ func listRetryTasks(qname string, pageNum, pageSize int) {
 
 func listArchivedTasks(qname string, pageNum, pageSize int) {
 	i := createInspector()
-	tasks, err := i.ListArchivedTasks(qname, asynq.PageSize(pageSize), asynq.Page(pageNum))
+	tasks, err := i.ListArchivedTasks(qname, inspeq.PageSize(pageSize), inspeq.Page(pageNum))
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -288,7 +288,7 @@ func listArchivedTasks(qname string, pageNum, pageSize int) {
 		[]string{"Key", "Type", "Payload", "Last Failed", "Last Error"},
 		func(w io.Writer, tmpl string) {
 			for _, t := range tasks {
-				fmt.Fprintf(w, tmpl, t.Key(), t.Type, t.Payload, t.LastFailedAt, t.ErrorMsg)
+				fmt.Fprintf(w, tmpl, t.Key(), t.Type, t.Payload, t.LastFailedAt, t.LastError)
 			}
 		})
 }
@@ -305,7 +305,7 @@ func taskCancel(cmd *cobra.Command, args []string) {
 	}
 }
 
-func taskKill(cmd *cobra.Command, args []string) {
+func taskArchive(cmd *cobra.Command, args []string) {
 	qname, err := cmd.Flags().GetString("queue")
 	if err != nil {
 		fmt.Printf("error: %v\n", err)
@@ -323,7 +323,7 @@ func taskKill(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Println("task transitioned to archived state")
+	fmt.Println("task archived")
 }
 
 func taskDelete(cmd *cobra.Command, args []string) {
@@ -365,7 +365,7 @@ func taskRun(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Println("task transitioned to pending state")
+	fmt.Println("task is now pending")
 }
 
 func taskArchiveAll(cmd *cobra.Command, args []string) {
@@ -383,6 +383,8 @@ func taskArchiveAll(cmd *cobra.Command, args []string) {
 	i := createInspector()
 	var n int
 	switch state {
+	case "pending":
+		n, err = i.ArchiveAllPendingTasks(qname)
 	case "scheduled":
 		n, err = i.ArchiveAllScheduledTasks(qname)
 	case "retry":
@@ -395,7 +397,7 @@ func taskArchiveAll(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Printf("%d tasks transitioned to archived state\n", n)
+	fmt.Printf("%d tasks archived\n", n)
 }
 
 func taskDeleteAll(cmd *cobra.Command, args []string) {
@@ -413,6 +415,8 @@ func taskDeleteAll(cmd *cobra.Command, args []string) {
 	i := createInspector()
 	var n int
 	switch state {
+	case "pending":
+		n, err = i.DeleteAllPendingTasks(qname)
 	case "scheduled":
 		n, err = i.DeleteAllScheduledTasks(qname)
 	case "retry":
@@ -459,5 +463,5 @@ func taskRunAll(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Printf("%d tasks transitioned to pending state\n", n)
+	fmt.Printf("%d tasks are now pending\n", n)
 }

tools/go.mod

@@ -3,17 +3,20 @@ module github.com/hibiken/asynq/tools
 go 1.13
 
 require (
+	github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6 // indirect
 	github.com/coreos/go-etcd v2.0.0+incompatible // indirect
 	github.com/cpuguy83/go-md2man v1.0.10 // indirect
 	github.com/fatih/color v1.9.0
 	github.com/go-redis/redis/v7 v7.4.0
 	github.com/google/uuid v1.1.1
-	github.com/hibiken/asynq v0.4.0
+	github.com/hibiken/asynq v0.14.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/spf13/cast v1.3.1
-	github.com/spf13/cobra v1.0.0
-	github.com/spf13/viper v1.6.2
+	github.com/spf13/cobra v1.1.1
+	github.com/spf13/viper v1.7.0
+	github.com/ugorji/go v1.1.4 // indirect
 	github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8 // indirect
+	github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77 // indirect
 )
 
 replace github.com/hibiken/asynq => ./..

tools/go.sum

@@ -1,31 +1,54 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
@@ -39,29 +62,61 @@ github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zV
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
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@@ -149,60 +229,137 @@ github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljT
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@@ -216,4 +373,10 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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