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Merge pull request #234 from fuwensun/pr4-4-3b

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fixed code
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chai2010 2018-08-06 22:47:58 +08:00 committed by GitHub
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1 changed files with 4 additions and 4 deletions
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8
ch4-rpc/ch4-04-grpc.md
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@ -262,11 +262,11 @@ func main() {
```protobuf
service PubsubService {
rpc Publish (String) returns (String);
rpc SubscribeTopic (String) returns (stream String);
rpc Subscribe (String) returns (stream String);
}
```
其中Publish是普通的RPC方法，SubscribeTopic则是一个单向的流服务。然后grpc插件会为服务端和客户端生成对应的接口：
其中Publish是普通的RPC方法，Subscribe则是一个单向的流服务。然后grpc插件会为服务端和客户端生成对应的接口：
```go
type PubsubServiceServer interface {
@ -286,7 +286,7 @@ type HelloService_SubscribeServer interface {
}
```
因为SubscribeTopic是服务端的单向流，因此生成的HelloService_SubscribeServer接口中只有Send方法。
因为Subscribe是服务端的单向流，因此生成的HelloService_SubscribeServer接口中只有Send方法。
然后就可以实现发布和订阅服务了：
@ -315,7 +315,7 @@ func (p *PubsubService) Publish(
func (p *PubsubService) Subscribe(
arg *String, stream PubsubService_SubscribeServer,
) error {
ch := p.SubscribeTopic(func(v interface{}) bool {
ch := p.Subscribe(func(v interface{}) bool {
if key, ok := v.(string); ok {
if strings.Hasprefix(arg.GetValue()) {
return true