mirror of
https://github.com/hibiken/asynq.git
synced 2024-12-27 08:12:19 +08:00
795 lines
21 KiB
Go
795 lines
21 KiB
Go
// Copyright 2020 Kentaro Hibino. All rights reserved.
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// Use of this source code is governed by a MIT license
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// that can be found in the LICENSE file.
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package rdb
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import (
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"encoding/json"
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"fmt"
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"strings"
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"time"
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"github.com/go-redis/redis/v7"
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"github.com/hibiken/asynq/internal/base"
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"github.com/rs/xid"
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"github.com/spf13/cast"
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)
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// Stats represents a state of queues at a certain time.
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type Stats struct {
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Enqueued int
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InProgress int
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Scheduled int
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Retry int
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Dead int
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Processed int
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Failed int
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Queues map[string]int // map of queue name to number of tasks in the queue (e.g., "default": 100, "critical": 20)
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Timestamp time.Time
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}
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// DailyStats holds aggregate data for a given day.
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type DailyStats struct {
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Processed int
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Failed int
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Time time.Time
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}
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// EnqueuedTask is a task in a queue and is ready to be processed.
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type EnqueuedTask struct {
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ID xid.ID
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Type string
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Payload map[string]interface{}
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Queue string
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}
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// InProgressTask is a task that's currently being processed.
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type InProgressTask struct {
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ID xid.ID
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Type string
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Payload map[string]interface{}
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}
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// ScheduledTask is a task that's scheduled to be processed in the future.
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type ScheduledTask struct {
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ID xid.ID
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Type string
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Payload map[string]interface{}
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ProcessAt time.Time
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Score int64
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Queue string
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}
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// RetryTask is a task that's in retry queue because worker failed to process the task.
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type RetryTask struct {
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ID xid.ID
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Type string
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Payload map[string]interface{}
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// TODO(hibiken): add LastFailedAt time.Time
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ProcessAt time.Time
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ErrorMsg string
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Retried int
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Retry int
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Score int64
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Queue string
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}
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// DeadTask is a task in that has exhausted all retries.
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type DeadTask struct {
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ID xid.ID
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Type string
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Payload map[string]interface{}
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LastFailedAt time.Time
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ErrorMsg string
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Score int64
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Queue string
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}
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// CurrentStats returns a current state of the queues.
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func (r *RDB) CurrentStats() (*Stats, error) {
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// KEYS[1] -> asynq:queues
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// KEYS[2] -> asynq:in_progress
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// KEYS[3] -> asynq:scheduled
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// KEYS[4] -> asynq:retry
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// KEYS[5] -> asynq:dead
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// KEYS[6] -> asynq:processed:<yyyy-mm-dd>
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// KEYS[7] -> asynq:failure:<yyyy-mm-dd>
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script := redis.NewScript(`
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local res = {}
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local queues = redis.call("SMEMBERS", KEYS[1])
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for _, qkey in ipairs(queues) do
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table.insert(res, qkey)
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table.insert(res, redis.call("LLEN", qkey))
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end
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table.insert(res, KEYS[2])
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table.insert(res, redis.call("LLEN", KEYS[2]))
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table.insert(res, KEYS[3])
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table.insert(res, redis.call("ZCARD", KEYS[3]))
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table.insert(res, KEYS[4])
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table.insert(res, redis.call("ZCARD", KEYS[4]))
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table.insert(res, KEYS[5])
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table.insert(res, redis.call("ZCARD", KEYS[5]))
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local pcount = 0
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local p = redis.call("GET", KEYS[6])
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if p then
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pcount = tonumber(p)
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end
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table.insert(res, "processed")
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table.insert(res, pcount)
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local fcount = 0
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local f = redis.call("GET", KEYS[7])
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if f then
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fcount = tonumber(f)
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end
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table.insert(res, "failed")
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table.insert(res, fcount)
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return res
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`)
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now := time.Now()
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res, err := script.Run(r.client, []string{
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base.AllQueues,
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base.InProgressQueue,
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base.ScheduledQueue,
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base.RetryQueue,
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base.DeadQueue,
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base.ProcessedKey(now),
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base.FailureKey(now),
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}).Result()
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if err != nil {
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return nil, err
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}
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data, err := cast.ToSliceE(res)
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if err != nil {
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return nil, err
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}
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stats := &Stats{
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Queues: make(map[string]int),
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Timestamp: now,
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}
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for i := 0; i < len(data); i += 2 {
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key := cast.ToString(data[i])
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val := cast.ToInt(data[i+1])
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switch {
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case strings.HasPrefix(key, base.QueuePrefix):
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stats.Enqueued += val
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stats.Queues[strings.TrimPrefix(key, base.QueuePrefix)] = val
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case key == base.InProgressQueue:
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stats.InProgress = val
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case key == base.ScheduledQueue:
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stats.Scheduled = val
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case key == base.RetryQueue:
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stats.Retry = val
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case key == base.DeadQueue:
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stats.Dead = val
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case key == "processed":
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stats.Processed = val
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case key == "failed":
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stats.Failed = val
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}
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}
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return stats, nil
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}
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// HistoricalStats returns a list of stats from the last n days.
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func (r *RDB) HistoricalStats(n int) ([]*DailyStats, error) {
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if n < 1 {
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return []*DailyStats{}, nil
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}
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const day = 24 * time.Hour
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now := time.Now().UTC()
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var days []time.Time
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var keys []string
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for i := 0; i < n; i++ {
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ts := now.Add(-time.Duration(i) * day)
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days = append(days, ts)
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keys = append(keys, base.ProcessedKey(ts))
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keys = append(keys, base.FailureKey(ts))
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}
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script := redis.NewScript(`
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local res = {}
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for _, key in ipairs(KEYS) do
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local n = redis.call("GET", key)
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if not n then
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n = 0
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end
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table.insert(res, tonumber(n))
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end
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return res
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`)
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res, err := script.Run(r.client, keys, len(keys)).Result()
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if err != nil {
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return nil, err
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}
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data, err := cast.ToIntSliceE(res)
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if err != nil {
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return nil, err
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}
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var stats []*DailyStats
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for i := 0; i < len(data); i += 2 {
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stats = append(stats, &DailyStats{
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Processed: data[i],
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Failed: data[i+1],
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Time: days[i/2],
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})
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}
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return stats, nil
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}
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// RedisInfo returns a map of redis info.
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func (r *RDB) RedisInfo() (map[string]string, error) {
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res, err := r.client.Info().Result()
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if err != nil {
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return nil, err
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}
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info := make(map[string]string)
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lines := strings.Split(res, "\r\n")
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for _, l := range lines {
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kv := strings.Split(l, ":")
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if len(kv) == 2 {
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info[kv[0]] = kv[1]
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}
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}
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return info, nil
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}
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func reverse(x []string) {
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for i := len(x)/2 - 1; i >= 0; i-- {
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opp := len(x) - 1 - i
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x[i], x[opp] = x[opp], x[i]
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}
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}
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// Pagination specifies the page size and page number
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// for the list operation.
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type Pagination struct {
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// Number of items in the page.
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Size uint
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// Page number starting from zero.
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Page uint
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}
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func (p Pagination) start() int64 {
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return int64(p.Size * p.Page)
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}
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func (p Pagination) stop() int64 {
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return int64(p.Size*p.Page + p.Size - 1)
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}
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// ListEnqueued returns enqueued tasks that are ready to be processed.
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func (r *RDB) ListEnqueued(qname string, pgn Pagination) ([]*EnqueuedTask, error) {
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qkey := base.QueueKey(qname)
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if !r.client.SIsMember(base.AllQueues, qkey).Val() {
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return nil, fmt.Errorf("queue %q does not exist", qname)
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}
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// Note: Because we use LPUSH to redis list, we need to calculate the
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// correct range and reverse the list to get the tasks with pagination.
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stop := -pgn.start() - 1
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start := -pgn.stop() - 1
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data, err := r.client.LRange(qkey, start, stop).Result()
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if err != nil {
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return nil, err
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}
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reverse(data)
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var tasks []*EnqueuedTask
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for _, s := range data {
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var msg base.TaskMessage
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err := json.Unmarshal([]byte(s), &msg)
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if err != nil {
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continue // bad data, ignore and continue
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}
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tasks = append(tasks, &EnqueuedTask{
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ID: msg.ID,
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Type: msg.Type,
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Payload: msg.Payload,
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Queue: msg.Queue,
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})
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}
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return tasks, nil
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}
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// ListInProgress returns all tasks that are currently being processed.
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func (r *RDB) ListInProgress(pgn Pagination) ([]*InProgressTask, error) {
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// Note: Because we use LPUSH to redis list, we need to calculate the
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// correct range and reverse the list to get the tasks with pagination.
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stop := -pgn.start() - 1
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start := -pgn.stop() - 1
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data, err := r.client.LRange(base.InProgressQueue, start, stop).Result()
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if err != nil {
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return nil, err
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}
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reverse(data)
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var tasks []*InProgressTask
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for _, s := range data {
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var msg base.TaskMessage
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err := json.Unmarshal([]byte(s), &msg)
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if err != nil {
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continue // bad data, ignore and continue
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}
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tasks = append(tasks, &InProgressTask{
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ID: msg.ID,
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Type: msg.Type,
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Payload: msg.Payload,
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})
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}
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return tasks, nil
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}
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// ListScheduled returns all tasks that are scheduled to be processed
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// in the future.
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func (r *RDB) ListScheduled(pgn Pagination) ([]*ScheduledTask, error) {
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data, err := r.client.ZRangeWithScores(base.ScheduledQueue, pgn.start(), pgn.stop()).Result()
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if err != nil {
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return nil, err
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}
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var tasks []*ScheduledTask
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for _, z := range data {
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s, ok := z.Member.(string)
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if !ok {
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continue // bad data, ignore and continue
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}
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var msg base.TaskMessage
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err := json.Unmarshal([]byte(s), &msg)
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if err != nil {
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continue // bad data, ignore and continue
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}
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processAt := time.Unix(int64(z.Score), 0)
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tasks = append(tasks, &ScheduledTask{
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ID: msg.ID,
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Type: msg.Type,
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Payload: msg.Payload,
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Queue: msg.Queue,
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ProcessAt: processAt,
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Score: int64(z.Score),
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})
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}
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return tasks, nil
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}
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// ListRetry returns all tasks that have failed before and willl be retried
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// in the future.
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func (r *RDB) ListRetry(pgn Pagination) ([]*RetryTask, error) {
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data, err := r.client.ZRangeWithScores(base.RetryQueue, pgn.start(), pgn.stop()).Result()
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if err != nil {
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return nil, err
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}
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var tasks []*RetryTask
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for _, z := range data {
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s, ok := z.Member.(string)
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if !ok {
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continue // bad data, ignore and continue
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}
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var msg base.TaskMessage
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err := json.Unmarshal([]byte(s), &msg)
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if err != nil {
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continue // bad data, ignore and continue
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}
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processAt := time.Unix(int64(z.Score), 0)
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tasks = append(tasks, &RetryTask{
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ID: msg.ID,
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Type: msg.Type,
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Payload: msg.Payload,
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ErrorMsg: msg.ErrorMsg,
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Retry: msg.Retry,
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Retried: msg.Retried,
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Queue: msg.Queue,
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ProcessAt: processAt,
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Score: int64(z.Score),
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})
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}
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return tasks, nil
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}
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// ListDead returns all tasks that have exhausted its retry limit.
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func (r *RDB) ListDead(pgn Pagination) ([]*DeadTask, error) {
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data, err := r.client.ZRangeWithScores(base.DeadQueue, pgn.start(), pgn.stop()).Result()
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if err != nil {
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return nil, err
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}
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var tasks []*DeadTask
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for _, z := range data {
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s, ok := z.Member.(string)
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if !ok {
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continue // bad data, ignore and continue
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}
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var msg base.TaskMessage
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err := json.Unmarshal([]byte(s), &msg)
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if err != nil {
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continue // bad data, ignore and continue
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}
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lastFailedAt := time.Unix(int64(z.Score), 0)
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tasks = append(tasks, &DeadTask{
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ID: msg.ID,
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Type: msg.Type,
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Payload: msg.Payload,
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ErrorMsg: msg.ErrorMsg,
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Queue: msg.Queue,
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LastFailedAt: lastFailedAt,
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Score: int64(z.Score),
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})
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}
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return tasks, nil
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}
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// EnqueueDeadTask finds a task that matches the given id and score from dead queue
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// and enqueues it for processing. If a task that matches the id and score
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// does not exist, it returns ErrTaskNotFound.
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func (r *RDB) EnqueueDeadTask(id xid.ID, score int64) error {
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n, err := r.removeAndEnqueue(base.DeadQueue, id.String(), float64(score))
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if err != nil {
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return err
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}
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if n == 0 {
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return ErrTaskNotFound
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}
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return nil
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}
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// EnqueueRetryTask finds a task that matches the given id and score from retry queue
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// and enqueues it for processing. If a task that matches the id and score
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// does not exist, it returns ErrTaskNotFound.
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func (r *RDB) EnqueueRetryTask(id xid.ID, score int64) error {
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n, err := r.removeAndEnqueue(base.RetryQueue, id.String(), float64(score))
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if err != nil {
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return err
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}
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if n == 0 {
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return ErrTaskNotFound
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}
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return nil
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}
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// EnqueueScheduledTask finds a task that matches the given id and score from scheduled queue
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// and enqueues it for processing. If a task that matches the id and score does not
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// exist, it returns ErrTaskNotFound.
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func (r *RDB) EnqueueScheduledTask(id xid.ID, score int64) error {
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n, err := r.removeAndEnqueue(base.ScheduledQueue, id.String(), float64(score))
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if err != nil {
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return err
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}
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if n == 0 {
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return ErrTaskNotFound
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}
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return nil
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}
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// EnqueueAllScheduledTasks enqueues all tasks from scheduled queue
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// and returns the number of tasks enqueued.
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func (r *RDB) EnqueueAllScheduledTasks() (int64, error) {
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return r.removeAndEnqueueAll(base.ScheduledQueue)
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}
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// EnqueueAllRetryTasks enqueues all tasks from retry queue
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// and returns the number of tasks enqueued.
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func (r *RDB) EnqueueAllRetryTasks() (int64, error) {
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return r.removeAndEnqueueAll(base.RetryQueue)
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}
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// EnqueueAllDeadTasks enqueues all tasks from dead queue
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// and returns the number of tasks enqueued.
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func (r *RDB) EnqueueAllDeadTasks() (int64, error) {
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return r.removeAndEnqueueAll(base.DeadQueue)
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}
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func (r *RDB) removeAndEnqueue(zset, id string, score float64) (int64, error) {
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script := redis.NewScript(`
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local msgs = redis.call("ZRANGEBYSCORE", KEYS[1], ARGV[1], ARGV[1])
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for _, msg in ipairs(msgs) do
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local decoded = cjson.decode(msg)
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if decoded["ID"] == ARGV[2] then
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redis.call("ZREM", KEYS[1], msg)
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local qkey = ARGV[3] .. decoded["Queue"]
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redis.call("LPUSH", qkey, msg)
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return 1
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end
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end
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return 0
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`)
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res, err := script.Run(r.client, []string{zset}, score, id, base.QueuePrefix).Result()
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if err != nil {
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return 0, err
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}
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n, ok := res.(int64)
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if !ok {
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return 0, fmt.Errorf("could not cast %v to int64", res)
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}
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return n, nil
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}
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func (r *RDB) removeAndEnqueueAll(zset string) (int64, error) {
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script := redis.NewScript(`
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local msgs = redis.call("ZRANGE", KEYS[1], 0, -1)
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for _, msg in ipairs(msgs) do
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redis.call("ZREM", KEYS[1], msg)
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local decoded = cjson.decode(msg)
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local qkey = ARGV[1] .. decoded["Queue"]
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redis.call("LPUSH", qkey, msg)
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end
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return table.getn(msgs)
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`)
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res, err := script.Run(r.client, []string{zset}, base.QueuePrefix).Result()
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if err != nil {
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return 0, err
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}
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n, ok := res.(int64)
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if !ok {
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return 0, fmt.Errorf("could not cast %v to int64", res)
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}
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return n, nil
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}
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// KillRetryTask finds a task that matches the given id and score from retry queue
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// and moves it to dead queue. If a task that maches the id and score does not exist,
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// it returns ErrTaskNotFound.
|
|
func (r *RDB) KillRetryTask(id xid.ID, score int64) error {
|
|
n, err := r.removeAndKill(base.RetryQueue, id.String(), float64(score))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if n == 0 {
|
|
return ErrTaskNotFound
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// KillScheduledTask finds a task that matches the given id and score from scheduled queue
|
|
// and moves it to dead queue. If a task that maches the id and score does not exist,
|
|
// it returns ErrTaskNotFound.
|
|
func (r *RDB) KillScheduledTask(id xid.ID, score int64) error {
|
|
n, err := r.removeAndKill(base.ScheduledQueue, id.String(), float64(score))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if n == 0 {
|
|
return ErrTaskNotFound
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// KillAllRetryTasks moves all tasks from retry queue to dead queue and
|
|
// returns the number of tasks that were moved.
|
|
func (r *RDB) KillAllRetryTasks() (int64, error) {
|
|
return r.removeAndKillAll(base.RetryQueue)
|
|
}
|
|
|
|
// KillAllScheduledTasks moves all tasks from scheduled queue to dead queue and
|
|
// returns the number of tasks that were moved.
|
|
func (r *RDB) KillAllScheduledTasks() (int64, error) {
|
|
return r.removeAndKillAll(base.ScheduledQueue)
|
|
}
|
|
|
|
func (r *RDB) removeAndKill(zset, id string, score float64) (int64, error) {
|
|
// KEYS[1] -> ZSET to move task from (e.g., retry queue)
|
|
// KEYS[2] -> asynq:dead
|
|
// ARGV[1] -> score of the task to kill
|
|
// ARGV[2] -> id of the task to kill
|
|
// ARGV[3] -> current timestamp
|
|
// ARGV[4] -> cutoff timestamp (e.g., 90 days ago)
|
|
// ARGV[5] -> max number of tasks in dead queue (e.g., 100)
|
|
script := redis.NewScript(`
|
|
local msgs = redis.call("ZRANGEBYSCORE", KEYS[1], ARGV[1], ARGV[1])
|
|
for _, msg in ipairs(msgs) do
|
|
local decoded = cjson.decode(msg)
|
|
if decoded["ID"] == ARGV[2] then
|
|
redis.call("ZREM", KEYS[1], msg)
|
|
redis.call("ZADD", KEYS[2], ARGV[3], msg)
|
|
redis.call("ZREMRANGEBYSCORE", KEYS[2], "-inf", ARGV[4])
|
|
redis.call("ZREMRANGEBYRANK", KEYS[2], 0, -ARGV[5])
|
|
return 1
|
|
end
|
|
end
|
|
return 0
|
|
`)
|
|
now := time.Now()
|
|
limit := now.AddDate(0, 0, -deadExpirationInDays).Unix() // 90 days ago
|
|
res, err := script.Run(r.client,
|
|
[]string{zset, base.DeadQueue},
|
|
score, id, now.Unix(), limit, maxDeadTasks).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
|
|
}
|
|
|
|
func (r *RDB) removeAndKillAll(zset string) (int64, error) {
|
|
// KEYS[1] -> ZSET to move task from (e.g., retry queue)
|
|
// KEYS[2] -> asynq:dead
|
|
// ARGV[1] -> current timestamp
|
|
// ARGV[2] -> cutoff timestamp (e.g., 90 days ago)
|
|
// ARGV[3] -> max number of tasks in dead queue (e.g., 100)
|
|
script := redis.NewScript(`
|
|
local msgs = redis.call("ZRANGE", KEYS[1], 0, -1)
|
|
for _, msg in ipairs(msgs) do
|
|
redis.call("ZREM", KEYS[1], msg)
|
|
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
|
|
return table.getn(msgs)
|
|
`)
|
|
now := time.Now()
|
|
limit := now.AddDate(0, 0, -deadExpirationInDays).Unix() // 90 days ago
|
|
res, err := script.Run(r.client, []string{zset, base.DeadQueue},
|
|
now.Unix(), limit, maxDeadTasks).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
|
|
}
|
|
|
|
// DeleteDeadTask finds a task that matches the given id and score from dead queue
|
|
// and deletes it. If a task that matches the id and score does not exist,
|
|
// it returns ErrTaskNotFound.
|
|
func (r *RDB) DeleteDeadTask(id xid.ID, score int64) error {
|
|
return r.deleteTask(base.DeadQueue, id.String(), float64(score))
|
|
}
|
|
|
|
// DeleteRetryTask finds a task that matches the given id and score from retry queue
|
|
// and deletes it. If a task that matches the id and score does not exist,
|
|
// it returns ErrTaskNotFound.
|
|
func (r *RDB) DeleteRetryTask(id xid.ID, score int64) error {
|
|
return r.deleteTask(base.RetryQueue, id.String(), float64(score))
|
|
}
|
|
|
|
// DeleteScheduledTask finds a task that matches the given id and score from
|
|
// scheduled queue and deletes it. If a task that matches the id and score
|
|
//does not exist, it returns ErrTaskNotFound.
|
|
func (r *RDB) DeleteScheduledTask(id xid.ID, score int64) error {
|
|
return r.deleteTask(base.ScheduledQueue, id.String(), float64(score))
|
|
}
|
|
|
|
func (r *RDB) deleteTask(zset, id string, score float64) error {
|
|
script := redis.NewScript(`
|
|
local msgs = redis.call("ZRANGEBYSCORE", KEYS[1], ARGV[1], ARGV[1])
|
|
for _, msg in ipairs(msgs) do
|
|
local decoded = cjson.decode(msg)
|
|
if decoded["ID"] == ARGV[2] then
|
|
redis.call("ZREM", KEYS[1], msg)
|
|
return 1
|
|
end
|
|
end
|
|
return 0
|
|
`)
|
|
res, err := script.Run(r.client, []string{zset}, score, id).Result()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
n, ok := res.(int64)
|
|
if !ok {
|
|
return fmt.Errorf("could not cast %v to int64", res)
|
|
}
|
|
if n == 0 {
|
|
return ErrTaskNotFound
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// DeleteAllDeadTasks deletes all tasks from the dead queue.
|
|
func (r *RDB) DeleteAllDeadTasks() error {
|
|
return r.client.Del(base.DeadQueue).Err()
|
|
}
|
|
|
|
// DeleteAllRetryTasks deletes all tasks from the dead queue.
|
|
func (r *RDB) DeleteAllRetryTasks() error {
|
|
return r.client.Del(base.RetryQueue).Err()
|
|
}
|
|
|
|
// DeleteAllScheduledTasks deletes all tasks from the dead queue.
|
|
func (r *RDB) DeleteAllScheduledTasks() error {
|
|
return r.client.Del(base.ScheduledQueue).Err()
|
|
}
|
|
|
|
// ErrQueueNotFound indicates specified queue does not exist.
|
|
type ErrQueueNotFound struct {
|
|
qname string
|
|
}
|
|
|
|
func (e *ErrQueueNotFound) Error() string {
|
|
return fmt.Sprintf("queue %q does not exist", e.qname)
|
|
}
|
|
|
|
// ErrQueueNotEmpty indicates specified queue is not empty.
|
|
type ErrQueueNotEmpty struct {
|
|
qname string
|
|
}
|
|
|
|
func (e *ErrQueueNotEmpty) Error() string {
|
|
return fmt.Sprintf("queue %q is not empty", e.qname)
|
|
}
|
|
|
|
// RemoveQueue removes the specified queue.
|
|
//
|
|
// If force is set to true, it will remove the queue regardless
|
|
// of whether the queue is empty.
|
|
// If force is set to false, it will only remove the queue if
|
|
// it is empty.
|
|
func (r *RDB) RemoveQueue(qname string, force bool) error {
|
|
var script *redis.Script
|
|
if force {
|
|
script = redis.NewScript(`
|
|
local n = redis.call("SREM", KEYS[1], KEYS[2])
|
|
if n == 0 then
|
|
return redis.error_reply("LIST NOT FOUND")
|
|
end
|
|
redis.call("DEL", KEYS[2])
|
|
return redis.status_reply("OK")
|
|
`)
|
|
} else {
|
|
script = redis.NewScript(`
|
|
local l = redis.call("LLEN", KEYS[2])
|
|
if l > 0 then
|
|
return redis.error_reply("LIST NOT EMPTY")
|
|
end
|
|
local n = redis.call("SREM", KEYS[1], KEYS[2])
|
|
if n == 0 then
|
|
return redis.error_reply("LIST NOT FOUND")
|
|
end
|
|
redis.call("DEL", KEYS[2])
|
|
return redis.status_reply("OK")
|
|
`)
|
|
}
|
|
err := script.Run(r.client,
|
|
[]string{base.AllQueues, base.QueueKey(qname)},
|
|
force).Err()
|
|
if err != nil {
|
|
switch err.Error() {
|
|
case "LIST NOT FOUND":
|
|
return &ErrQueueNotFound{qname}
|
|
case "LIST NOT EMPTY":
|
|
return &ErrQueueNotEmpty{qname}
|
|
default:
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ListProcesses returns the list of process statuses.
|
|
func (r *RDB) ListProcesses() ([]*base.ProcessInfo, error) {
|
|
// Note: Script also removes stale keys.
|
|
script := redis.NewScript(`
|
|
local res = {}
|
|
local now = tonumber(ARGV[1])
|
|
local keys = redis.call("ZRANGEBYSCORE", KEYS[1], now, "+inf")
|
|
for _, key in ipairs(keys) do
|
|
local ps = redis.call("GET", key)
|
|
if ps then
|
|
table.insert(res, ps)
|
|
end
|
|
end
|
|
redis.call("ZREMRANGEBYSCORE", KEYS[1], "-inf", now-1)
|
|
return res
|
|
`)
|
|
res, err := script.Run(r.client,
|
|
[]string{base.AllProcesses}, time.Now().UTC().Unix()).Result()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
data, err := cast.ToStringSliceE(res)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var processes []*base.ProcessInfo
|
|
for _, s := range data {
|
|
var ps base.ProcessInfo
|
|
err := json.Unmarshal([]byte(s), &ps)
|
|
if err != nil {
|
|
continue // skip bad data
|
|
}
|
|
processes = append(processes, &ps)
|
|
}
|
|
return processes, nil
|
|
}
|