# 4.7 调用Sentinel
# 4.7.1 简介
对官方库的二次封装。
# 4.7.2 配置规范
# 4.7.3 用法
// run: go run main.go --config=config.toml
package main
import (
"fmt"
"math/rand"
"time"
"github.com/douyu/jupiter/pkg/util/xgo"
"github.com/douyu/jupiter"
"github.com/douyu/jupiter/pkg/sentinel"
"github.com/douyu/jupiter/pkg/util/xtime"
"github.com/douyu/jupiter/pkg/xlog"
)
type Engine struct {
jupiter.Application
}
func NewEngine() *Engine {
eng := &Engine{}
if err := eng.Startup(
eng.exampleSentinel,
); err != nil {
xlog.Panic("startup", xlog.Any("err", err))
}
return eng
}
func main() {
app := NewEngine()
if err := app.Run(); err != nil {
panic(err)
}
}
func (eng *Engine) exampleSentinel() (err error) {
err = sentinel.StdConfig("test").Build()
if err != nil {
panic(fmt.Sprintf("sentinel init failed: %s", err.Error()))
}
for k := 0; k < 20; k++ {
xgo.Go(func() {
e, b := sentinel.Entry("some-test")
if b != nil {
// 请求被拒绝，在此处进行处理
time.Sleep(time.Duration(rand.Uint64()%10) * time.Millisecond)
} else {
// 请求允许通过，此处编写业务逻辑
fmt.Println(xtime.CurrentTimeMillis(), "Passed")
time.Sleep(time.Duration(rand.Uint64()%10) * time.Millisecond)
// 务必保证业务结束后调用 Exit
e.Exit()
}
})
}
return
}
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执行 go run main.go --config=config.toml,可以看到如下图结果
