github.com/fufuok/balancer@v1.0.0/examples/wr/main.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  
     6  	"github.com/fufuok/balancer"
     7  )
     8  
     9  func main() {
    10  	// Weighted node
    11  	wNodes := map[string]int{
    12  		"A": 5,
    13  		"B": 3,
    14  		"C": 1,
    15  		"D": 0,
    16  	}
    17  	// lb := balancer.New(balancer.WeightedRand, wNodes)
    18  	lb := balancer.NewWeightedRand(wNodes)
    19  	fmt.Println("balancer name:", lb.Name())
    20  
    21  	for i := 0; i < 9; i++ {
    22  		fmt.Print(lb.Select(), " ")
    23  	}
    24  	fmt.Println()
    25  
    26  	// add an item to be selected
    27  	lb.Add("E", 20)
    28  	fmt.Println(lb.Select())
    29  
    30  	// get all items
    31  	wNodes = lb.All().(map[string]int)
    32  	// map[A:5 B:3 C:1 D:0 E:20]
    33  	fmt.Printf("%+v\n", wNodes)
    34  
    35  	wNodes["E"] = 5
    36  	wNodes["D"] = 1
    37  	wNodes["A"] = 0
    38  	delete(wNodes, "B")
    39  	// reinitialize the balancer items
    40  	lb.Update(wNodes)
    41  
    42  	for i := 0; i < 14; i++ {
    43  		fmt.Print(lb.Select(), " ")
    44  	}
    45  	fmt.Println()
    46  
    47  	// reset the balancer items weight
    48  	lb.Reset()
    49  
    50  	// remove an item
    51  	lb.Remove("E")
    52  
    53  	// remove all items
    54  	lb.RemoveAll()
    55  }