/
redis.go
321 lines (291 loc) · 7.67 KB
/
redis.go
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package controller_redis
import (
"bytes"
"context"
"errors"
"fmt"
"runtime"
"strconv"
"sync"
"time"
json "github.com/json-iterator/go"
"github.com/songzhibin97/gkit/distributed/broker"
"github.com/songzhibin97/gkit/distributed/task"
"github.com/songzhibin97/gkit/distributed/controller"
"github.com/go-redis/redis/v8"
"github.com/go-redsync/redsync/v4"
"github.com/go-redsync/redsync/v4/redis/goredis/v8"
)
type ControllerRedis struct {
*broker.Broker
// client redis客户端
client redis.UniversalClient
// lock 分布式锁
lock *redsync.Redsync
// wg
// consumingWg 确保消费组并发完成
consumingWg sync.WaitGroup
// processingWg 确保正在处理的任务并发完成
processingWg sync.WaitGroup
// delayedWg 确保延时任务并发完成
delayedWg sync.WaitGroup
// consumingQueue 消费队列名称
consumingQueue string
// delayedQueue 延迟队列名称
delayedQueue string
}
// SetConsumingQueue 设置消费队列名称
func (c *ControllerRedis) SetConsumingQueue(consumingQueue string) {
c.consumingQueue = consumingQueue
}
// SetDelayedQueue 设置延迟队列名称
func (c *ControllerRedis) SetDelayedQueue(delayedQueue string) {
c.delayedQueue = delayedQueue
}
func (c *ControllerRedis) RegisterTask(name ...string) {
c.RegisterList(name...)
}
func (c *ControllerRedis) IsRegisterTask(name string) bool {
return c.IsRegister(name)
}
func (c *ControllerRedis) StartConsuming(concurrency int, handler task.Processor) (bool, error) {
c.consumingWg.Add(1)
defer c.consumingWg.Done()
// 设置阈值,如果并发数 < 1, 默认设置成 2*cpu
if concurrency < 1 {
concurrency = runtime.NumCPU() * 2
}
_, err := c.client.Ping(context.Background()).Result()
if err != nil {
// 重试
c.Broker.GetRetryFn()(c.Broker.GetRetryCtx())
if c.Broker.GetRetry() {
return true, err
}
return false, controller.ErrorConnectClose
}
// 初始化工作区
pool := make(chan struct{}, concurrency)
worker := make(chan []byte, concurrency)
// 填满并发池
for i := 0; i < concurrency; i++ {
pool <- struct{}{}
}
go func() {
fmt.Println("[*] Waiting for messages. To exit press CTRL+C")
for {
select {
case <-c.GetStopCtx().Done():
close(worker)
return
case _, ok := <-pool:
if !ok {
return
}
tByte, err := c.popTask(c.consumingQueue, 0)
if err != nil && !errors.Is(err, redis.Nil) {
fmt.Println("popTask err:", err)
}
// 如果是有效数据,发送给worker
if len(tByte) > 0 {
worker <- tByte
}
pool <- struct{}{}
}
}
}()
c.delayedWg.Add(1)
go func() {
defer c.delayedWg.Done()
for {
select {
case <-c.GetStopCtx().Done():
return
default:
tBody, err := c.popDelayedTask(c.delayedQueue, 0)
if err != nil {
fmt.Println("popDelayedTask err:", err)
continue
}
if tBody == nil {
continue
}
t := task.Signature{}
if err = json.Unmarshal(tBody, &t); err != nil {
fmt.Println("unmarshal err:", err)
continue
}
if err = c.Publish(c.GetStopCtx(), &t); err != nil {
fmt.Println("publish err:", err)
continue
}
}
}
}()
if err = c.consume(worker, concurrency, handler); err != nil {
return c.GetRetry(), err
}
c.processingWg.Wait()
return c.GetRetry(), err
}
// popTask 弹出任务
func (c *ControllerRedis) popTask(queue string, blockTime int64) ([]byte, error) {
if blockTime <= 0 {
blockTime = int64(1000 * time.Millisecond)
}
items, err := c.client.BLPop(context.Background(), time.Duration(blockTime), queue).Result()
if err != nil {
return nil, err
}
// items[0] - the name of the key where an element was popped
// items[1] - the value of the popped element
if len(items) != 2 {
return nil, redis.Nil
}
result := []byte(items[1])
return result, nil
}
// popDelayedTask 弹出延时任务,因为延时任务是使用Redis ZSet
func (c *ControllerRedis) popDelayedTask(queue string, blockTime int64) ([]byte, error) {
if blockTime <= 0 {
blockTime = int64(1000 * time.Millisecond)
}
var result []byte
for {
time.Sleep(time.Duration(blockTime))
watchFn := func(tx *redis.Tx) error {
now := time.Now().Local().UnixNano()
max := strconv.FormatInt(now, 10)
items, err := tx.ZRevRangeByScore(c.GetStopCtx(), queue, &redis.ZRangeBy{Min: "0", Max: max, Offset: 0, Count: 1}).Result()
if err != nil {
return err
}
if len(items) != 1 {
return redis.Nil
}
_, err = tx.TxPipelined(c.GetStopCtx(), func(pipe redis.Pipeliner) error {
pipe.ZRem(c.GetStopCtx(), queue, items[0])
result = []byte(items[0])
return nil
})
return err
}
if err := c.client.Watch(c.GetStopCtx(), watchFn, queue); err != nil {
break
}
}
return result, nil
}
// consume 消费
func (c *ControllerRedis) consume(worker <-chan []byte, concurrency int, handler task.Processor) error {
// 初始化工作区
pool := make(chan struct{}, concurrency)
errorsChan := make(chan error, concurrency*2)
// 填满并发池
for i := 0; i < concurrency; i++ {
pool <- struct{}{}
}
for {
select {
case <-c.GetStopCtx().Done():
return c.GetStopCtx().Err()
case err := <-errorsChan:
return err
case v, ok := <-worker:
if !ok {
return nil
}
// 阻塞等待
select {
case <-pool:
case <-c.GetStopCtx().Done():
return c.GetStopCtx().Err()
}
c.processingWg.Add(1)
go func() {
if err := c.consumeOne(v, c.consumingQueue, handler); err != nil {
errorsChan <- err
}
c.processingWg.Done()
pool <- struct{}{}
}()
}
}
}
func (c *ControllerRedis) consumeOne(taskBody []byte, queue string, handler task.Processor) error {
t := task.Signature{}
decoder := json.NewDecoder(bytes.NewReader(taskBody))
decoder.UseNumber()
if err := decoder.Decode(&t); err != nil {
return err
}
if !c.IsRegisterTask(t.Name) {
if t.IgnoreNotRegisteredTask {
return nil
}
c.client.RPush(c.GetStopCtx(), queue, handler)
return nil
}
return handler.Process(&t)
}
func (c *ControllerRedis) StopConsuming() {
c.Broker.StopConsuming()
c.consumingWg.Wait()
c.delayedWg.Wait()
c.client.Close()
}
func (c *ControllerRedis) Publish(ctx context.Context, t *task.Signature) error {
tBody, err := json.Marshal(t)
if err != nil {
return err
}
if t.ETA != nil {
now := time.Now().Local()
if t.ETA.After(now) {
score := t.ETA.UnixNano()
return c.client.ZAdd(c.GetStopCtx(), c.delayedQueue, &redis.Z{Score: float64(score), Member: tBody}).Err()
}
}
return c.client.RPush(c.GetStopCtx(), t.Router, tBody).Err()
}
func (c *ControllerRedis) GetPendingTasks(queue string) ([]*task.Signature, error) {
results, err := c.client.LRange(c.GetStopCtx(), queue, 0, -1).Result()
if err != nil {
return nil, err
}
taskSlice := make([]*task.Signature, 0, len(results))
for _, result := range results {
var t task.Signature
err = json.Unmarshal([]byte(result), &t)
if err != nil {
return nil, err
}
taskSlice = append(taskSlice, &t)
}
return taskSlice, nil
}
func (c *ControllerRedis) GetDelayedTasks() ([]*task.Signature, error) {
results, err := c.client.LRange(c.GetStopCtx(), c.delayedQueue, 0, -1).Result()
if err != nil {
return nil, err
}
taskSlice := make([]*task.Signature, 0, len(results))
for _, result := range results {
var t task.Signature
err = json.Unmarshal([]byte(result), &t)
if err != nil {
return nil, err
}
taskSlice = append(taskSlice, &t)
}
return taskSlice, nil
}
func NewControllerRedis(broker *broker.Broker, client redis.UniversalClient, consumingQueue, delayedQueue string) controller.Controller {
return &ControllerRedis{
Broker: broker,
client: client,
lock: redsync.New(goredis.NewPool(client)),
consumingQueue: consumingQueue,
delayedQueue: delayedQueue,
}
}