youtu_grpc/app/ecpm_service/internal/svc/service_context.go

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package svc
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import (
"context"
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"gitea.youtukeji.com.cn/youtu/youtu_grpc/app/auth_service/authservice"
"gitea.youtukeji.com.cn/youtu/youtu_grpc/pkg/config"
"github.com/spf13/viper"
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"github.com/zeromicro/go-zero/core/conf"
"github.com/zeromicro/go-zero/core/discov"
"github.com/zeromicro/go-zero/zrpc"
clientv3 "go.etcd.io/etcd/client/v3"
)
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type ServiceContext struct {
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Config config.Config
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AuthServiceClient authservice.AuthService
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etcdCli *clientv3.Client
EcpmConfig *EcpmConfigCli
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}
func NewServiceContext(c config.Config) *ServiceContext {
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svc := &ServiceContext{
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Config: c,
}
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//初始化etcd客户端
svc.initEtcd()
//初始化auth_service客户端
svc.initAuthServiceClient()
return svc
}
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const EcpmConfigWatchKey = "/youtu/ecpm/config"
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func (svc *ServiceContext) initEtcd() {
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svc.EcpmConfig = NewEcpmConfig()
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//初始化etcd客户端
cli, err := clientv3.NewFromURL(viper.GetString(config.EtcdAddrKey))
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if err != nil {
panic(err)
}
//获取ecpm配置
res, err := cli.Get(context.Background(), EcpmConfigWatchKey)
if err != nil {
panic(err)
}
//设置ecpm配置
for _, kv := range res.Kvs {
svc.EcpmConfig.SetAllByJson(kv.Value)
}
//监听etcd
go func() {
ch := cli.Watch(context.Background(), EcpmConfigWatchKey)
//从通道中尝试取值(监视的信息)
for res := range ch {
for _, evt := range res.Events {
svc.EcpmConfig.SetAllByJson(evt.Kv.Value)
}
}
}()
svc.etcdCli = cli
}
// initAuthServiceClient inits the AuthServiceClient.
func (svc *ServiceContext) initAuthServiceClient() {
clientConf := zrpc.RpcClientConf{}
err := conf.FillDefault(&clientConf) // 填充默认值,比如 trace 透传等,参考服务配置说明
if err != nil {
panic(err)
}
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clientConf.Token = "auth_service.rpc.key"
clientConf.App = "auth_service.rpc"
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clientConf.Etcd = discov.EtcdConf{ // 通过 etcd 服务发现
Hosts: []string{viper.GetString(config.EtcdAddrKey)},
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Key: "auth_service.rpc",
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}
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svc.AuthServiceClient = authservice.NewAuthService(zrpc.MustNewClient(clientConf))
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}