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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/ethanvc/evo/base" | ||
| "github.com/ethanvc/evo/plog" | ||
| "github.com/redis/go-redis/v9" | ||
| "go.uber.org/fx" | ||
| "google.golang.org/grpc/codes" | ||
| "log/slog" | ||
| ) | ||
|
|
||
| func main() { | ||
| fx.New().Run() | ||
| } | ||
|
|
||
| // https://learn.microsoft.com/en-gb/aspnet/web-api/overview/data/using-web-api-with-entity-framework/part-5 | ||
| // DTO对象，用于传输和对外输出实体属性 | ||
|
|
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| type QueryUserReq struct { | ||
| Uid int64 | ||
| } | ||
|
|
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| type UserDto struct { | ||
| } | ||
|
|
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| type userController struct { | ||
| redisCli redis.UniversalClient | ||
| } | ||
|
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| func (controller *userController) QueryUser(c context.Context, req *QueryUserReq) (resp *UserDto, err error) { | ||
| // query redis cache, case can downgrade | ||
| switch base.Code(err) { | ||
| case codes.OK: | ||
| plog.ReportEvent(c, "UserFoundInCache") | ||
| return | ||
| case codes.NotFound: | ||
| plog.ReportEvent(c, "UserNotFoundInCache") | ||
| default: | ||
| plog.ReportErrEvent(c, "UserCacheUnknownErr") | ||
| slog.ErrorContext(c, "UserCacheUnknownErr") | ||
| } | ||
| return | ||
| } | ||
|
|
||
| func (controller *userController) queryUserFromCache(c context.Context, req *QueryUserReq) (resp *UserDto, err error) { | ||
| cmd := controller.redisCli.Get(c, fmt.Sprintf("a_%d", req.Uid)) | ||
| if cmd.Err() != nil { | ||
| return nil, cmd.Err() | ||
| } | ||
| return | ||
| } |
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