https://github.com/xsymphony/notify
https://github.com/xsymphony/notify
Last synced: about 1 year ago
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- Host: GitHub
- URL: https://github.com/xsymphony/notify
- Owner: xsymphony
- Created: 2020-06-09T05:00:32.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2020-06-09T10:07:34.000Z (about 6 years ago)
- Last Synced: 2024-04-18T11:23:15.202Z (over 2 years ago)
- Language: Go
- Size: 3.91 KB
- Stars: 3
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# notify
notify包用于单应用内的消息通信，提供`发布/订阅`、`取消订阅`、`超时`、`超时处理`、`扇出`、`工作池`等功能。
## 基础功能
```go
package main
import (
"context"
"fmt"
"time"
"github.com/xsymphony/notify"
)
func main() {
// consume from the "simple" topic
notify.Watch(context.TODO(), "simple", func(msg interface{}) {
fmt.Println("[watch]", msg)
})
// producer msg to the "simple" topic
for i := 0; i < 10; i++ {
notify.Send(context.TODO(), "simple", i)
}
time.Sleep(1*time.Second)
}
// stdout:
// [watch]1
// [watch]2
// [watch]3
// ...
// [watch]9
```
## 消费超时设置
```go
package main
import (
"context"
"fmt"
"time"
"github.com/xsymphony/notify"
)
func main() {
var fn = func(msg interface{}) {
time.Sleep(1*time.Second)
fmt.Println("[watch]", msg)
}
var timeoutFn = func(msg interface{}) {
fmt.Println("[watch]msg timeout ", msg)
}
notify.Watch(context.TODO(), "timeout", fn, notify.Timeout(500*time.Millisecond), notify.TimeoutFunc(timeoutFn))
notify.Send(context.TODO(), "timeout", 1)
time.Sleep(1*time.Second)
}
// stdout:
// [watch]msg timeout 1
```
## 扇出
```go
package main
import (
"context"
"fmt"
"time"
"github.com/xsymphony/notify"
)
func main() {
notify.Watch(context.TODO(), "fanout", func(msg interface{}) {
fmt.Println("[watch][A]", msg)
})
notify.Watch(context.TODO(), "fanout", func(msg interface{}) {
fmt.Println("[watch][B]", msg)
})
notify.Watch(context.TODO(), "fanout", func(msg interface{}) {
fmt.Println("[watch][C]", msg)
})
notify.Send(context.TODO(), "fanout", 1)
time.Sleep(1*time.Second)
}
// stdout:
// [watch][A]1
// [watch][C]1
// [watch][B]1
```
## 工作池
```go
package main
import (
"bytes"
"context"
"fmt"
"runtime"
"strconv"
"github.com/xsymphony/notify"
)
func getGID() uint64 {
b := make([]byte, 64)
b = b[:runtime.Stack(b, false)]
b = bytes.TrimPrefix(b, []byte("goroutine "))
b = b[:bytes.IndexByte(b, ' ')]
n, _ := strconv.ParseUint(string(b), 10, 64)
return n
}
func main() {
notify.Watch(context.TODO(), "simple", func(msg interface{}) {
fmt.Println("[watch]", "id:", getGID(), msg)
}, notify.WorkerSize(3))
for i := 0; i < 10; i++ {
notify.Send(context.TODO(), "simple", i)
}
}
// stdout:
// [watch] id: 49 0
// [watch] id: 50 1
// [watch] id: 49 3
// [watch] id: 51 2
// [watch] id: 50 4
// [watch] id: 51 6
// [watch] id: 49 5
// [watch] id: 50 7
// [watch] id: 49 9
// [watch] id: 51 8
```