turn nil, err
}
return asynq.NewTask(TypeEmailDelivery, payload), nil
}
// HandleEmailDeliveryTask 发送email处理逻辑
func HandleEmailDeliveryTask(ctx context.Context, t *asynq.Task) error {
//接收任务数据
var p EmailDeliveryPayload
if err := json.Unmarshal(t.Payload(), &p); err != nil {
return fmt.Errorf("json.Unmarshal failed: %v: %w", err, asynq.SkipRetry)
}
//逻辑处理start...
log.Printf("Sending Email to User: user_id=%d, template_id=%s data_str:%s", p.UserID, p.TemplateID, p.DataStr)
return nil
}
client.go
在应用程序代码中，导入上述包并用于Client将任务放入队列中。
package client
import (
"asynq_task/test_delivery"
"fmt"
"github.com/hibiken/asynq"
"log"
"time"
)
func EmailDeliveryTaskAdd(i int) {
client := asynq.NewClient(asynq.RedisClientOpt{
Addr: "192.168.0.120:6379",
Password: "123456",
DB: 2,
})
defer client.Close()
// 初使货需要传递的数据
task, err := test_delivery.NewEmailDeliveryTask(42, fmt.Sprintf("some:template:id:%d", i), `{"name":"lisi"}`)
if err != nil {
log.Fatalf("could not create task: %v", err)
}
// 任务入队
//info, err := client.Enqueue(task)
//info, err := client.Enqueue(task, time.Now())
// 延迟执行
info, err := client.Enqueue(task, asynq.ProcessIn(3*time.Second))
// MaxRetry 重度次数 Timeout超时时间
//info, err = client.Enqueue(task, asynq.MaxRetry(10), asynq.Timeout(3*time.Second))
if err != nil {
log.Fatalf("could not enqueue task: %v", err)
}
log.Printf("enqueued task: id=%s queue=%s", info.ID, info.Queue)
}
main.go 异步任务服务入口文件
接下来，启动一个工作服务器以在后台处理这些任务。要启动后台工作人员，使用Server并提供您Handler来处理任务。可以选择使用ServeMux来创建处理程序，就像使用net/httpHandler 一样。
package main
import (
"asynq_task/test_delivery"
"github.com/hibiken/asynq"
"log"
)
func main() {
srv := asynq.NewServer(
asynq.RedisClientOpt{
Addr: "192.168.0.120:6379",
Password: "123456",
DB: 2,
},
asynq.Config{
// 每个进程并发执行的worker数量
Concurrency: 5,
// Optionally specify multiple queues with different priority.
Queues: map[string]int{
"critical": 6,
"default": 3,
"low": 1,
},
// See the godoc for other configuration options
},
)
mux := asynq.NewServeMux()
mux.HandleFunc(test_delivery.TypeEmailDelivery, test_delivery.HandleEmailDeliveryTask)
if err := srv.Run(mux); err != nil {
log.Fatalf("could not run server: %v", err)
}
}
4）test.go 用来分发异步任务
package main
import (
"asynq_task/test_delivery/client"
"time"
)
func main() {
for i := 0; i < 3; i++ {
client.EmailDeliveryTaskAdd(i)
time.Sleep(time.Second * 3)
}
}
6. 运行查看结果
-
首先，我们要先把异步任务启动起来准备好接收，也就是启动cmd/main.go
-
启动test.go文件向异步任务服务添加任务队列
结果如下：
消息者 go run main.go
$ go run main.go
asynq: pid=12092 2023/02/02 23:18:04.161872 INFO: Starting processing
asynq: pid=12092 2023/02/02 23:18:04.161872 INFO: Send signal TERM or INT to terminate the process
2023/02/03 07:18:14 Sending Email to User: user_id=42, template_id=some:template:id:0 data_str:{"name":"lisi"}
2023/02/03 07:18:19 Sending Email to User: user_