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* feat: add zookeeper * fix: update go.mod * feat: add example for zookeeper; use log insteadof grpclog Co-authored-by: Shengwen Yu <yushengwen@tron.network>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package balancer | ||
|
|
||
| import ( | ||
| "context" | ||
| "log" | ||
| "math/rand" | ||
| "strconv" | ||
| "sync" | ||
|
|
||
| "google.golang.org/grpc/balancer" | ||
| "google.golang.org/grpc/balancer/base" | ||
| "google.golang.org/grpc/resolver" | ||
| ) | ||
|
|
||
| const RoundRobin = "round_robin" | ||
|
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| // newRoundRobinBuilder creates a new roundrobin balancer builder. | ||
| func newRoundRobinBuilder() balancer.Builder { | ||
| return base.NewBalancerBuilderWithConfig(RoundRobin, &roundRobinPickerBuilder{}, base.Config{HealthCheck: true}) | ||
| } | ||
|
|
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| func InitRoundRobin() { | ||
| balancer.Register(newRoundRobinBuilder()) | ||
| } | ||
|
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| type roundRobinPickerBuilder struct{} | ||
|
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| func (*roundRobinPickerBuilder) Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker { | ||
| log.Printf("roundrobinPicker: newPicker called with readySCs: %v\n", readySCs) | ||
|
|
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| if len(readySCs) == 0 { | ||
| return base.NewErrPicker(balancer.ErrNoSubConnAvailable) | ||
| } | ||
| var scs []balancer.SubConn | ||
| for addr, sc := range readySCs { | ||
| weight := 1 | ||
| if addr.Metadata != nil { | ||
| if m, ok := addr.Metadata.(*map[string]string); ok { | ||
| w, ok := (*m)["weight"] | ||
| if ok { | ||
| n, err := strconv.Atoi(w) | ||
| if err == nil && n > 0 { | ||
| weight = n | ||
| } | ||
| } | ||
| } | ||
| } | ||
| for i := 0; i < weight; i++ { | ||
| scs = append(scs, sc) | ||
| } | ||
| } | ||
|
|
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| return &roundRobinPicker{ | ||
| subConns: scs, | ||
| next: rand.Intn(len(scs)), | ||
| } | ||
| } | ||
|
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| type roundRobinPicker struct { | ||
| subConns []balancer.SubConn | ||
| mu sync.Mutex | ||
| next int | ||
| } | ||
|
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| func (p *roundRobinPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) { | ||
| p.mu.Lock() | ||
| sc := p.subConns[p.next] | ||
| p.next = (p.next + 1) % len(p.subConns) | ||
| p.mu.Unlock() | ||
| return sc, nil, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| package main | ||
|
|
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| import ( | ||
| registry "github.com/TRON-US/chaos/zookeeper" | ||
| "github.com/TRON-US/chaos/zookeeper/balancer" | ||
| "github.com/TRON-US/chaos/zookeeper/example/proto" | ||
| "golang.org/x/net/context" | ||
| "google.golang.org/grpc" | ||
| "log" | ||
| "time" | ||
| ) | ||
|
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||
| func main() { | ||
| registry.RegisterResolver("zk", []string{"127.0.0.1:2181"}, "test", "v1.0") | ||
| //c, err := grpc.Dial("zk:///", grpc.WithInsecure(), grpc.WithBalancerName(balancer.RoundRobin)) | ||
| balancer.InitRoundRobin() | ||
| c, err := grpc.Dial("zk:///", grpc.WithInsecure(), grpc.WithBalancerName(balancer.RoundRobin)) | ||
| if err != nil { | ||
| log.Printf("grpc dial: %s", err) | ||
| return | ||
| } | ||
| defer c.Close() | ||
| client := proto.NewTestClient(c) | ||
|
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| for i := 0; i < 5000; i++ { | ||
| resp, err := client.Say(context.Background(), &proto.SayReq{Content: "round robin"}) | ||
| if err != nil { | ||
| log.Println("aa:", err) | ||
| time.Sleep(time.Second) | ||
| continue | ||
| } | ||
| time.Sleep(time.Second) | ||
| log.Printf(resp.Content) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| //protoc --go_out=plugins=grpc:. hello.proto | ||
|
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| syntax = "proto3"; | ||
|
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| package proto; | ||
|
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| message SayReq { | ||
| string content = 1; | ||
| } | ||
|
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| message SayResp { | ||
| string content = 1; | ||
| } | ||
|
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| service Test{ | ||
| rpc Say(SayReq) returns (SayResp) {} | ||
| } |
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