Tutorial Intro

Some practical tools、 algorithms written in Go

p2c grpc balancer

// example
func test() {
    cc, err := grpc.Dial(r.Scheme()+":///test.server",
        grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"loadBalancingConfig": [{"%s":{}}]}`, p2c.Name)))
    if err != nil {
        t.Fatalf("failed to dial: %v", err)
    }
    defer cc.Close()
}

ast rule engine

supported operator

• comparator: > >= < <= ==

• bitwise: & | ^

• bitwiseShift: << >>

• additive: + -

• multiplicative: * / %

• prefix: !(NOT) -(NEGATE)

• logic: && ||

• func call: ( ) , func(do func call with build in function and custom function)

• params type: Ident Number String Bool array, struct (DO Not support func )

• recursive params call with .: map.mapKey.mapKey.arrayIndex.structFiledName (foo.bar.2.Name)

• Link

  • See Example Here
  • See Unit Test Here

// example
import (
    . "github.com/sado0823/go-kitx/kit/rule"
)

func main(){

    expr := `foo + 1 > bar`
    
    param := map[string]interface{}{
        "foo": 5,
        "bar": 6,
    }
    
    res, err := Do(context.Background(), expr, param)
    if err != nil {
        panic(err)
    }
}