go-pkg/asynq
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Update RDB.Dequeue to return message and deadline

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This commit is contained in:
Ken Hibino 2020-06-18 05:45:10 -07:00
parent 6cc5bafaba
commit 9b05dea394
4 changed files with 83 additions and 50 deletions
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2
internal/base/base.go
View File

@ -267,7 +267,7 @@ func (c *Cancelations) GetAll() []context.CancelFunc {
type Broker interface {
Enqueue(msg *TaskMessage) error
EnqueueUnique(msg *TaskMessage, ttl time.Duration) error
Dequeue(qnames ...string) (*TaskMessage, error)
Dequeue(qnames ...string) (*TaskMessage, int, error)
Done(msg *TaskMessage) error
Requeue(msg *TaskMessage) error
Schedule(msg *TaskMessage, processAt time.Time) error

45
internal/rdb/rdb.go
View File

@ -102,22 +102,26 @@ func (r *RDB) EnqueueUnique(msg *base.TaskMessage, ttl time.Duration) error {
return nil
}
// Dequeue queries given queues in order and pops a task message if there is one and returns it.
// Dequeue queries given queues in order and pops a task message
// off a queue if one exists and returns the message and deadline in Unix time in seconds.
// Dequeue skips a queue if the queue is paused.
// If all queues are empty, ErrNoProcessableTask error is returned.
func (r *RDB) Dequeue(qnames ...string) (*base.TaskMessage, error) {
func (r *RDB) Dequeue(qnames ...string) (msg *base.TaskMessage, deadline int, err error) {
var qkeys []interface{}
for _, q := range qnames {
qkeys = append(qkeys, base.QueueKey(q))
}
data, err := r.dequeue(qkeys...)
data, deadline, err := r.dequeue(qkeys...)
if err == redis.Nil {
return nil, ErrNoProcessableTask
return nil, 0, ErrNoProcessableTask
}
if err != nil {
return nil, err
return nil, 0, err
}
return base.DecodeMessage(data)
if msg, err = base.DecodeMessage(data); err != nil {
return nil, 0, err
}
return msg, deadline, nil
}
// KEYS[1] -> asynq:in_progress
@ -134,9 +138,9 @@ var dequeueCmd = redis.NewScript(`
for i = 2, table.getn(ARGV) do
local qkey = ARGV[i]
if redis.call("SISMEMBER", KEYS[2], qkey) == 0 then
local res = redis.call("RPOPLPUSH", qkey, KEYS[1])
if res then
local decoded = cjson.decode(res)
local msg = redis.call("RPOPLPUSH", qkey, KEYS[1])
if msg then
local decoded = cjson.decode(msg)
local timeout = decoded["Timeout"]
local deadline = decoded["Deadline"]
local score
@ -149,23 +153,36 @@ for i = 2, table.getn(ARGV) do
else
return redis.error_reply("asynq internal error: both timeout and deadline are not set")
end
redis.call("ZADD", KEYS[3], score, res)
return res
redis.call("ZADD", KEYS[3], score, msg)
return {msg, score}
end
end
end
return nil`)
func (r *RDB) dequeue(qkeys ...interface{}) (data string, err error) {
func (r *RDB) dequeue(qkeys ...interface{}) (msgjson string, deadline int, err error) {
var args []interface{}
args = append(args, time.Now().Unix())
args = append(args, qkeys...)
res, err := dequeueCmd.Run(r.client,
[]string{base.InProgressQueue, base.PausedQueues, base.KeyDeadlines}, args...).Result()
if err != nil {
return "", err
return "", 0, err
}
return cast.ToStringE(res)
data, err := cast.ToSliceE(res)
if err != nil {
return "", 0, err
}
if len(data) != 2 {
return "", 0, fmt.Errorf("asynq: internal error: dequeue command returned %v values", len(data))
}
if msgjson, err = cast.ToStringE(data[0]); err != nil {
return "", 0, err
}
if deadline, err = cast.ToIntE(data[1]); err != nil {
return "", 0, err
}
return msgjson, deadline, nil
}
// KEYS[1] -> asynq:in_progress

50
internal/rdb/rdb_test.go
View File

@ -143,7 +143,8 @@ func TestDequeue(t *testing.T) {
tests := []struct {
enqueued map[string][]*base.TaskMessage
args []string // list of queues to query
want *base.TaskMessage
wantMsg *base.TaskMessage
wantDeadline int
err error
wantEnqueued map[string][]*base.TaskMessage
wantInProgress []*base.TaskMessage
@ -154,7 +155,8 @@ func TestDequeue(t *testing.T) {
"default": {t1},
},
args: []string{"default"},
want: t1,
wantMsg: t1,
wantDeadline: t1Deadline,
err: nil,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {},
@ -172,7 +174,8 @@ func TestDequeue(t *testing.T) {
"default": {},
},
args: []string{"default"},
want: nil,
wantMsg: nil,
wantDeadline: 0,
err: ErrNoProcessableTask,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {},
@ -187,7 +190,8 @@ func TestDequeue(t *testing.T) {
"low": {t3},
},
args: []string{"critical", "default", "low"},
want: t2,
wantMsg: t2,
wantDeadline: t2Deadline,
err: nil,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {t1},
@ -209,7 +213,8 @@ func TestDequeue(t *testing.T) {
"low": {t2, t1},
},
args: []string{"critical", "default", "low"},
want: t3,
wantMsg: t3,
wantDeadline: t3Deadline,
err: nil,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {},
@ -231,7 +236,8 @@ func TestDequeue(t *testing.T) {
"low": {},
},
args: []string{"critical", "default", "low"},
want: nil,
wantMsg: nil,
wantDeadline: 0,
err: ErrNoProcessableTask,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {},
@ -249,10 +255,20 @@ func TestDequeue(t *testing.T) {
h.SeedEnqueuedQueue(t, r.client, msgs, queue)
}
got, err := r.Dequeue(tc.args...)
if !cmp.Equal(got, tc.want) || err != tc.err {
t.Errorf("(*RDB).Dequeue(%v) = %v, %v; want %v, %v",
tc.args, got, err, tc.want, tc.err)
gotMsg, gotDeadline, err := r.Dequeue(tc.args...)
if err != tc.err {
t.Errorf("(*RDB).Dequeue(%v) returned error %v; want %v",
tc.args, err, tc.err)
continue
}
if !cmp.Equal(gotMsg, tc.wantMsg) || err != tc.err {
t.Errorf("(*RDB).Dequeue(%v) returned message %v; want %v",
tc.args, gotMsg, tc.wantMsg)
continue
}
if gotDeadline != tc.wantDeadline {
t.Errorf("(*RDB).Dequeue(%v) returned deadline %v; want %v",
tc.args, gotDeadline, tc.wantDeadline)
continue
}
@ -284,7 +300,7 @@ func TestDequeueIgnoresPausedQueues(t *testing.T) {
paused []string // list of paused queues
enqueued map[string][]*base.TaskMessage
args []string // list of queues to query
want *base.TaskMessage
wantMsg *base.TaskMessage
err error
wantEnqueued map[string][]*base.TaskMessage
wantInProgress []*base.TaskMessage
@ -296,7 +312,7 @@ func TestDequeueIgnoresPausedQueues(t *testing.T) {
"critical": {t2},
},
args: []string{"default", "critical"},
want: t2,
wantMsg: t2,
err: nil,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {t1},
@ -310,7 +326,7 @@ func TestDequeueIgnoresPausedQueues(t *testing.T) {
"default": {t1},
},
args: []string{"default"},
want: nil,
wantMsg: nil,
err: ErrNoProcessableTask,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {t1},
@ -324,7 +340,7 @@ func TestDequeueIgnoresPausedQueues(t *testing.T) {
"critical": {t2},
},
args: []string{"default", "critical"},
want: nil,
wantMsg: nil,
err: ErrNoProcessableTask,
wantEnqueued: map[string][]*base.TaskMessage{
"default": {t1},
@ -345,10 +361,10 @@ func TestDequeueIgnoresPausedQueues(t *testing.T) {
h.SeedEnqueuedQueue(t, r.client, msgs, queue)
}
got, err := r.Dequeue(tc.args...)
if !cmp.Equal(got, tc.want) || err != tc.err {
got, _, err := r.Dequeue(tc.args...)
if !cmp.Equal(got, tc.wantMsg) || err != tc.err {
t.Errorf("Dequeue(%v) = %v, %v; want %v, %v",
tc.args, got, err, tc.want, tc.err)
tc.args, got, err, tc.wantMsg, tc.err)
continue
}

4
internal/testbroker/testbroker.go
View File

@ -60,11 +60,11 @@ func (tb *TestBroker) EnqueueUnique(msg *base.TaskMessage, ttl time.Duration) er
return tb.real.EnqueueUnique(msg, ttl)
}
func (tb *TestBroker) Dequeue(qnames ...string) (*base.TaskMessage, error) {
func (tb *TestBroker) Dequeue(qnames ...string) (*base.TaskMessage, int, error) {
tb.mu.Lock()
defer tb.mu.Unlock()
if tb.sleeping {
return nil, errRedisDown
return nil, 0, errRedisDown
}
return tb.real.Dequeue(qnames...)
}