forked from digitalocean/go-workers2
/
redis.go
232 lines (177 loc) · 5.36 KB
/
redis.go
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package storage
import (
"context"
"fmt"
"log"
"strconv"
"time"
"github.com/go-redis/redis/v8"
)
type redisStore struct {
namespace string
client *redis.Client
logger *log.Logger
}
// Compile-time check to ensure that Redis store does in fact implement the Store interface
var _ Store = &redisStore{}
// NewRedisStore returns a new Redis store with the given namespace and preconfigured client
func NewRedisStore(namespace string, client *redis.Client, logger *log.Logger) Store {
return &redisStore{
namespace: namespace,
client: client,
logger: logger,
}
}
func (r *redisStore) DequeueMessage(ctx context.Context, queue string, inprogressQueue string, timeout time.Duration) (string, error) {
message, err := r.client.BRPopLPush(ctx, r.getQueueName(queue), r.getQueueName(inprogressQueue), timeout).Result()
if err != nil {
// If redis returns null, the queue is empty.
// Just ignore empty queue errors; print all other errors.
if err != redis.Nil {
r.logger.Println("ERR: ", queue, err)
} else {
err = NoMessage
}
time.Sleep(1 * time.Second)
return "", err
}
return message, nil
}
func (r *redisStore) EnqueueMessage(ctx context.Context, queue string, priority float64, message string) error {
_, err := r.client.ZAdd(ctx, r.getQueueName(queue), &redis.Z{
Score: priority,
Member: message,
}).Result()
return err
}
func (r *redisStore) EnqueueScheduledMessage(ctx context.Context, priority float64, message string) error {
_, err := r.client.ZAdd(ctx, r.namespace+ScheduledJobsKey, &redis.Z{
Score: priority,
Member: message,
}).Result()
return err
}
func (r *redisStore) DequeueScheduledMessage(ctx context.Context, priority float64) (string, error) {
key := r.namespace + ScheduledJobsKey
messages, err := r.client.ZRangeByScore(ctx, key, &redis.ZRangeBy{
Min: "-inf",
Max: strconv.FormatFloat(priority, 'f', -1, 64),
Offset: 0,
Count: 1,
}).Result()
if err != nil {
return "", err
}
if len(messages) == 0 {
return "", NoMessage
}
removed, err := r.client.ZRem(ctx, key, messages[0]).Result()
if err != nil {
return "", err
}
if removed == 0 {
return "", NoMessage
}
return messages[0], nil
}
func (r *redisStore) EnqueueRetriedMessage(ctx context.Context, priority float64, message string) error {
_, err := r.client.ZAdd(ctx, r.namespace+RetryKey, &redis.Z{
Score: priority,
Member: message,
}).Result()
return err
}
func (r *redisStore) DequeueRetriedMessage(ctx context.Context, priority float64) (string, error) {
key := r.namespace + RetryKey
messages, err := r.client.ZRangeByScore(ctx, key, &redis.ZRangeBy{
Min: "-inf",
Max: strconv.FormatFloat(priority, 'f', -1, 64),
Offset: 0,
Count: 1,
}).Result()
if err != nil {
return "", err
}
if len(messages) == 0 {
return "", NoMessage
}
removed, err := r.client.ZRem(ctx, key, messages[0]).Result()
if err != nil {
return "", err
}
if removed == 0 {
return "", NoMessage
}
return messages[0], nil
}
func (r *redisStore) EnqueueMessageNow(ctx context.Context, queue string, message string) error {
queue = r.namespace + "queue:" + queue
_, err := r.client.LPush(ctx, queue, message).Result()
return err
}
func (r *redisStore) GetAllRetries(ctx context.Context) (*Retries, error) {
pipe := r.client.Pipeline()
retryCountGet := pipe.ZCard(ctx, r.namespace+RetryKey)
retryJobsGet := pipe.ZRange(ctx, r.namespace+RetryKey, 0, -1)
_, err := pipe.Exec(ctx)
if err != nil && err != redis.Nil {
return nil, err
}
return &Retries{
RetryJobs: retryJobsGet.Val(),
TotalRetryCount: retryCountGet.Val(),
}, nil
}
func (r *redisStore) GetAllStats(ctx context.Context, queues []string) (*Stats, error) {
pipe := r.client.Pipeline()
pGet := pipe.Get(ctx, r.namespace+"stat:processed")
fGet := pipe.Get(ctx, r.namespace+"stat:failed")
rGet := pipe.ZCard(ctx, r.namespace+RetryKey)
qLen := map[string]*redis.IntCmd{}
for _, queue := range queues {
qLen[r.namespace+queue] = pipe.LLen(ctx, fmt.Sprintf("%squeue:%s", r.namespace, queue))
}
_, err := pipe.Exec(ctx)
if err != nil && err != redis.Nil {
return nil, err
}
stats := &Stats{
Enqueued: make(map[string]int64),
}
stats.Processed, _ = strconv.ParseInt(pGet.Val(), 10, 64)
stats.Failed, _ = strconv.ParseInt(fGet.Val(), 10, 64)
stats.RetryCount = rGet.Val()
for q, l := range qLen {
stats.Enqueued[q] = l.Val()
}
return stats, nil
}
func (r *redisStore) AcknowledgeMessage(ctx context.Context, queue string, message string) error {
_, err := r.client.LRem(ctx, r.getQueueName(queue), -1, message).Result()
return err
}
func (r *redisStore) CreateQueue(ctx context.Context, queue string) error {
_, err := r.client.SAdd(ctx, r.namespace+"queues", queue).Result()
return err
}
func (r *redisStore) ListMessages(ctx context.Context, queue string) ([]string, error) {
messages, err := r.client.LRange(ctx, r.getQueueName(queue), 0, -1).Result()
if err != nil {
return nil, err
}
return messages, nil
}
func (r *redisStore) IncrementStats(ctx context.Context, metric string) error {
rc := r.client
today := time.Now().UTC().Format("2006-01-02")
pipe := rc.Pipeline()
pipe.Incr(ctx, r.namespace+"stat:"+metric)
pipe.Incr(ctx, r.namespace+"stat:"+metric+":"+today)
if _, err := pipe.Exec(ctx); err != nil {
return err
}
return nil
}
func (r *redisStore) getQueueName(queue string) string {
return r.namespace + "queue:" + queue
}