diff --git a/common/vo/vo.go b/common/vo/vo.go new file mode 100644 index 0000000..af273bb --- /dev/null +++ b/common/vo/vo.go @@ -0,0 +1,8 @@ +package vo + +type TransferRequest struct { + SourceUserId int + TargetAccountNumber string + TargetAmount float64 + TargetCurrency string +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..96b1d0d --- /dev/null +++ b/go.mod @@ -0,0 +1,59 @@ +module dddexample + +go 1.18 + +require ( + github.com/IBM/sarama v1.41.2 + github.com/gin-gonic/gin v1.9.1 + gorm.io/driver/mysql v1.5.1 + gorm.io/gorm v1.25.1 + gorm.io/plugin/soft_delete v1.2.1 +) + +require ( + github.com/bytedance/sonic v1.9.1 // indirect + github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/eapache/go-resiliency v1.4.0 // indirect + github.com/eapache/go-xerial-snappy v0.0.0-20230731223053-c322873962e3 // indirect + github.com/eapache/queue v1.1.0 // indirect + github.com/gabriel-vasile/mimetype v1.4.2 // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/go-playground/locales v0.14.1 // indirect + github.com/go-playground/universal-translator v0.18.1 // indirect + github.com/go-playground/validator/v10 v10.14.0 // indirect + github.com/go-sql-driver/mysql v1.7.0 // indirect + github.com/goccy/go-json v0.10.2 // indirect + github.com/golang/snappy v0.0.4 // indirect + github.com/hashicorp/errwrap v1.0.0 // indirect + github.com/hashicorp/go-multierror v1.1.1 // indirect + github.com/hashicorp/go-uuid v1.0.3 // indirect + github.com/jcmturner/aescts/v2 v2.0.0 // indirect + github.com/jcmturner/dnsutils/v2 v2.0.0 // indirect + github.com/jcmturner/gofork v1.7.6 // indirect + github.com/jcmturner/gokrb5/v8 v8.4.4 // indirect + github.com/jcmturner/rpc/v2 v2.0.3 // indirect + github.com/jinzhu/inflection v1.0.0 // indirect + github.com/jinzhu/now v1.1.5 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/compress v1.16.7 // indirect + github.com/klauspost/cpuid/v2 v2.2.4 // indirect + github.com/kr/text v0.2.0 // indirect + github.com/leodido/go-urn v1.2.4 // indirect + github.com/mattn/go-isatty v0.0.19 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/pelletier/go-toml/v2 v2.0.8 // indirect + github.com/pierrec/lz4/v4 v4.1.18 // indirect + github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect + github.com/rogpeppe/go-internal v1.11.0 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.2.11 // indirect + golang.org/x/arch v0.3.0 // indirect + golang.org/x/crypto v0.13.0 // indirect + golang.org/x/net v0.15.0 // indirect + golang.org/x/sys v0.12.0 // indirect + golang.org/x/text v0.13.0 // indirect + google.golang.org/protobuf v1.30.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..8dc5758 --- /dev/null +++ b/go.sum @@ -0,0 +1,182 @@ +github.com/IBM/sarama v1.41.2 h1:ZDBZfGPHAD4uuAtSv4U22fRZBgst0eEwGFzLj0fb85c= +github.com/IBM/sarama v1.41.2/go.mod h1:xdpu7sd6OE1uxNdjYTSKUfY8FaKkJES9/+EyjSgiGQk= +github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM= +github.com/bytedance/sonic v1.9.1 h1:6iJ6NqdoxCDr6mbY8h18oSO+cShGSMRGCEo7F2h0x8s= +github.com/bytedance/sonic v1.9.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U= +github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY= +github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams= +github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk= +github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/eapache/go-resiliency v1.4.0 h1:3OK9bWpPk5q6pbFAaYSEwD9CLUSHG8bnZuqX2yMt3B0= +github.com/eapache/go-resiliency v1.4.0/go.mod h1:5yPzW0MIvSe0JDsv0v+DvcjEv2FyD6iZYSs1ZI+iQho= +github.com/eapache/go-xerial-snappy v0.0.0-20230731223053-c322873962e3 h1:Oy0F4ALJ04o5Qqpdz8XLIpNA3WM/iSIXqxtqo7UGVws= +github.com/eapache/go-xerial-snappy v0.0.0-20230731223053-c322873962e3/go.mod h1:YvSRo5mw33fLEx1+DlK6L2VV43tJt5Eyel9n9XBcR+0= +github.com/eapache/queue v1.1.0 h1:YOEu7KNc61ntiQlcEeUIoDTJ2o8mQznoNvUhiigpIqc= +github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I= +github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw= +github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU= +github.com/gabriel-vasile/mimetype v1.4.2/go.mod h1:zApsH/mKG4w07erKIaJPFiX0Tsq9BFQgN3qGY5GnNgA= +github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE= +github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI= +github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg= +github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU= +github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s= +github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA= +github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY= +github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY= +github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY= 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h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= diff --git a/main.go b/main.go new file mode 100644 index 0000000..4fd0a40 --- /dev/null +++ b/main.go @@ -0,0 +1,16 @@ +package dddexample + +import ( + "dddexample/normal/controller" + "dddexample/pkg/interfaces" + "github.com/gin-gonic/gin" +) + +func main() { + //使用默认gin路由 + r := gin.Default() + + r.POST("test1", controller.Transfer) //详情，微信购买 + r.POST("test2", interfaces.Transfer) //详情，微信购买 + +} diff --git a/normal/common/common.go b/normal/common/common.go new file mode 100644 index 0000000..394177a --- /dev/null +++ b/normal/common/common.go @@ -0,0 +1,67 @@ +package common + +import ( + "encoding/json" + "errors" + "fmt" + "github.com/IBM/sarama" + "io" + "log" + "net/http" +) + +type YaHuRes struct { + Rate float64 +} + +func GetExchangeRate(nowCurrency, targetCurrency string) (float64, error) { + + res, err := http.Get("http://www.google.com?now=" + nowCurrency + "&targetCurrency=" + targetCurrency) + + if err != nil { + return 0, err + } + + body, err := io.ReadAll(res.Body) + res.Body.Close() + + if res.StatusCode != 200 { + log.Fatalf("Response failed with status code: %d and\nbody: %s\n", res.StatusCode, body) + return 0, errors.New(fmt.Sprintf("Response failed with status code: %d and\nbody: %s\n", res.StatusCode, body)) + } + if err != nil { + return 0, err + } + + var yahuRes YaHuRes + err = json.Unmarshal(body, &yahuRes) + + if err != nil { + return 0, err + } + + return yahuRes.Rate, err + +} + +func SendKafka(key string, info string) error { + config := sarama.NewConfig() + config.Producer.RequiredAcks = sarama.WaitForAll + config.Producer.Retry.Max = 5 + config.Producer.Return.Successes = true + + producer, err := sarama.NewSyncProducer([]string{"localhost:9092"}, config) + if err != nil { + fmt.Println("Failed to create producer:", err) + return err + } + + defer producer.Close() + + message := &sarama.ProducerMessage{ + Topic: key, + Value: sarama.StringEncoder(info), + } + _, _, err = producer.SendMessage(message) + return err +} diff --git a/normal/controller/transfer.go b/normal/controller/transfer.go new file mode 100644 index 0000000..5483081 --- /dev/null +++ b/normal/controller/transfer.go @@ -0,0 +1,20 @@ +package controller + +import ( + "dddexample/common/vo" + "dddexample/normal/service" + "github.com/gin-gonic/gin" + "github.com/gin-gonic/gin/binding" +) + +// Transfer 创建订单 +func Transfer(c *gin.Context) { + var req vo.TransferRequest + + if err := c.ShouldBindBodyWith(&req, binding.JSON); err != nil { + return + } + + service.Transfer(req.SourceUserId,req.TargetAccountNumber,req.TargetAmount,req.TargetCurrency) + return +} diff --git a/normal/model/common.go b/normal/model/common.go new file mode 100644 index 0000000..eb99ddd --- /dev/null +++ b/normal/model/common.go @@ -0,0 +1,13 @@ +package model + +func SelectByUserId(id int) Account { + var obj Account + DB.Model(&Account{}).Find(&obj,id) + return obj +} + +func SelectByAccountNumber(phone string) Account { + var obj Account + DB.Model(&Account{}).Where(&Account{TelNum: phone}).Find(&obj) + return obj +} \ No newline at end of file diff --git a/normal/model/init.go b/normal/model/init.go new file mode 100644 index 0000000..f92f450 --- /dev/null +++ b/normal/model/init.go @@ -0,0 +1,56 @@ +package model + +import ( + "fmt" + "strings" + "time" + + "gorm.io/driver/mysql" + "gorm.io/gorm" + "gorm.io/gorm/schema" +) + +var DB *gorm.DB + +type MysqlConfig struct { + Db string + DbHost string + DbPort string + DbUser string + DbPassWord string + DbName string +} + +func LoadEnv(config MysqlConfig) { + + //MySQL数据库 + path := strings.Join([]string{config.DbUser, ":", config.DbPassWord, "@tcp(", config.DbHost, ":", + config.DbPort, ")/", config.DbName, "?charset=utf8&parseTime=true&loc=Local"}, "") + + fmt.Println(path) + //连接数据库 + Database(path) +} + +func Database(conn string) { + db, err := gorm.Open(mysql.New(mysql.Config{ + DSN: conn, // DSN data source name + DefaultStringSize: 256, // string 类型字段的默认长度 + DisableDatetimePrecision: true, // 禁用 datetime 精度，MySQL 5.6 之前的数据库不支持 + DontSupportRenameIndex: true, // 重命名索引时采用删除并新建的方式，MySQL 5.7 之前的数据库和 MariaDB 不支持重命名索引 + DontSupportRenameColumn: true, // 用 `change` 重命名列，MySQL 8 之前的数据库和 MariaDB 不支持重命名列 + SkipInitializeWithVersion: false, // 根据版本自动配置 + }), &gorm.Config{ + NamingStrategy: schema.NamingStrategy{ + SingularTable: true, + }, + }) + if err != nil { + panic(err) + } + sqlDB, _ := db.DB() + sqlDB.SetMaxIdleConns(20) //设置连接池，空闲 + sqlDB.SetMaxOpenConns(100) //打开 + sqlDB.SetConnMaxLifetime(time.Second * 30) + DB = db +} diff --git a/normal/model/user.go b/normal/model/user.go new file mode 100644 index 0000000..b377b4d --- /dev/null +++ b/normal/model/user.go @@ -0,0 +1,19 @@ +package model + +import ( + "gorm.io/plugin/soft_delete" + "time" +) + +//Account 用户模型 +type Account struct { + ID uint `gorm:"primarykey"` + CreatedAt time.Time + UpdatedAt time.Time + DeletedAt soft_delete.DeletedAt `gorm:"column:deleted_at;type:int(11)" json:"deletedAt"` + Account string `gorm:"unique"` + TelNum string + Currency string + Amount float64 + DailyLimit float64 +} diff --git a/normal/service/transfer.go b/normal/service/transfer.go new file mode 100644 index 0000000..bdbc67d --- /dev/null +++ b/normal/service/transfer.go @@ -0,0 +1,141 @@ +package service + +import ( + "dddexample/normal/common" + model2 "dddexample/normal/model" + "encoding/json" + "errors" + "fmt" + "github.com/IBM/sarama" + "io" + "net/http" +) + +func TransferOld(sourceUserId int, targetAccountNumber string, targetAmount float64, targetCurrency string) error { + // 1. 从数据库读取数据，忽略所有校验逻辑如账号是否存在等,错误忽略 + var targetAccountDO, sourceAccountDO model2.Account + model2.DB.Model(&model2.Account{}).Find(&sourceAccountDO, sourceUserId) + model2.DB.Model(&model2.Account{}).Where(&model2.Account{TelNum: targetAccountNumber}).Find(&targetAccountDO) + + // 2. 业务参数校验 + if targetAccountDO.Currency != targetCurrency { + return errors.New("收款人货币种类与转账使用货币不同") + } + + // 3. 获取外部数据，并且包含一定的业务逻辑 获取汇率 + exchangeRate := 1.0 + if sourceAccountDO.Currency != targetCurrency { + var err error + + res, err := http.Get("http://www.google.com?now=" + sourceAccountDO.Currency + "&targetCurrency=" + targetCurrency) + + if err != nil { + return err + } + + body, err := io.ReadAll(res.Body) + res.Body.Close() + + if err != nil { + return err + } + + if res.StatusCode != 200 { + return errors.New(fmt.Sprintf("Response failed with status code: %d and\nbody: %s\n", res.StatusCode, body)) + } + + var yahuRes common.YaHuRes + err = json.Unmarshal(body, &yahuRes) + + if err != nil { + return err + } + exchangeRate = yahuRes.Rate + } + + sourceAmount := targetAmount * exchangeRate + + // 4. 业务参数校验 + if sourceAccountDO.Amount < sourceAmount { + return errors.New("余额不足") + } + + if sourceAccountDO.DailyLimit < sourceAmount { + return errors.New("超出限额") + } + + // 5. 计算新值，并且更新字段 + sourceAccountDO.Amount -= sourceAmount + targetAccountDO.Amount += sourceAmount + + // 6. 更新到数据库 + model2.DB.Save(sourceAccountDO) + model2.DB.Save(targetAccountDO) + + // 7. 发送审计消息String message = sourceUserId + "," + targetAccountNumber + "," + targetAmount + "," + targetCurrency; + //common.SendKafka("kafka", "") + config := sarama.NewConfig() + config.Producer.RequiredAcks = sarama.WaitForAll + config.Producer.Retry.Max = 5 + config.Producer.Return.Successes = true + + producer, err := sarama.NewSyncProducer([]string{"localhost:9092"}, config) + if err != nil { + fmt.Println("Failed to create producer:", err) + return err + } + + defer producer.Close() + + message := &sarama.ProducerMessage{ + Topic: "my_topic", + Value: sarama.StringEncoder("Hello, Kafka!"), + } + _, _, err = producer.SendMessage(message) + + return err +} + +func Transfer(sourceUserId int, targetAccountNumber string, targetAmount float64, targetCurrency string) error { + // 1. 从数据库读取数据，忽略所有校验逻辑如账号是否存在等 + sourceAccountDO := model2.SelectByUserId(sourceUserId) + targetAccountDO := model2.SelectByAccountNumber(targetAccountNumber) + + // 2. 业务参数校验 + if targetAccountDO.Currency != targetCurrency { + return errors.New("收款人货币种类与转账使用货币不同") + } + + // 3. 获取外部数据，并且包含一定的业务逻辑 获取汇率 + exchangeRate := 1.0 + if sourceAccountDO.Currency != targetCurrency { + var err error + exchangeRate, err = common.GetExchangeRate(sourceAccountDO.Currency, targetCurrency) + if err != nil { + return err + } + } + + sourceAmount := targetAmount * exchangeRate + + // 4. 业务参数校验 + if sourceAccountDO.Amount < sourceAmount { + return errors.New("余额不足") + } + + if sourceAccountDO.DailyLimit < sourceAmount { + return errors.New("超出限额") + } + + // 5. 计算新值，并且更新字段 + sourceAccountDO.Amount -= sourceAmount + targetAccountDO.Amount += sourceAmount + + // 6. 更新到数据库 + model2.DB.Save(sourceAccountDO) + model2.DB.Save(targetAccountDO) + + // 7. 发送审计消息String message = sourceUserId + "," + targetAccountNumber + "," + targetAmount + "," + targetCurrency; + common.SendKafka("kafka", "") + return nil +} diff --git a/pkg/application/external/exchangerage.go b/pkg/application/external/exchangerage.go new file mode 100644 index 0000000..a94aa10 --- /dev/null +++ b/pkg/application/external/exchangerage.go @@ -0,0 +1,5 @@ +package external + +type QueueMsgRepository interface { + SendMsg(topic, info string) error +} diff --git a/pkg/application/external/queuemsg.go b/pkg/application/external/queuemsg.go new file mode 100644 index 0000000..b539232 --- /dev/null +++ b/pkg/application/external/queuemsg.go @@ -0,0 +1,9 @@ +package external + +import ( + "dddexample/pkg/domain/entity" +) + +type ExchangeRateRepository interface { + GetExchangeRage(nowCurrency, nextCurrent string) (*entity.ExchangeRate, error) +} diff --git a/pkg/application/repository/user.go b/pkg/application/repository/user.go new file mode 100644 index 0000000..2b405be --- /dev/null +++ b/pkg/application/repository/user.go @@ -0,0 +1,11 @@ +package repository + +import ( + "dddexample/pkg/domain/entity" +) + +type UserRepository interface { + SelectByID(id int) *entity.AccountEntity + SelectByAccountNumber(account string) *entity.AccountEntity + UpdateAccountMoney(*entity.AccountEntity) +} diff --git a/pkg/application/transfer.go b/pkg/application/transfer.go new file mode 100644 index 0000000..e0eb726 --- /dev/null +++ b/pkg/application/transfer.go @@ -0,0 +1,51 @@ +package application + +import ( + "dddexample/pkg/application/external" + "dddexample/pkg/application/repository" + "dddexample/pkg/domain/entity" + "dddexample/pkg/domain/service" + "dddexample/pkg/infrastructure/externalimp" + "dddexample/pkg/infrastructure/repositoryimp" +) + +var transferApplication *TransferApplication + +type TransferApplication struct { + repository repository.UserRepository + exchangeRateRepository external.ExchangeRateRepository + queueRepository external.QueueMsgRepository +} + +func init() { + transferApplication = &TransferApplication{ + repository: &repositoryimp.UserRepositoryImp{}, + exchangeRateRepository: &externalimp.ExchangeRage{}, + queueRepository: &externalimp.KafkaQueue{}, + } +} + +func (a *TransferApplication) Transfer(sourceUserId int, targetAccountNumber string, targetAmount float64, targetCurrency string) error { + + money := entity.Money{Amount: targetAmount, Currency: targetCurrency} + + // 1. 从数据库读取数据，忽略所有校验逻辑如账号是否存在等 + sourceAccountDO := a.repository.SelectByID(sourceUserId) + targetAccountDO := a.repository.SelectByAccountNumber(targetAccountNumber) + + // 3. 获取外部数据，并且包含一定的业务逻辑 获取汇率 + rate, _ := a.exchangeRateRepository.GetExchangeRage(sourceAccountDO.Currency, targetCurrency) + + err := service.Transfer(sourceAccountDO, targetAccountDO, money, rate) + if err != nil { + return err + } + + a.repository.UpdateAccountMoney(sourceAccountDO) + a.repository.UpdateAccountMoney(targetAccountDO) + + // 7. 发送审计消息String message = sourceUserId + "," + targetAccountNumber + "," + targetAmount + "," + targetCurrency; + err = a.queueRepository.SendMsg("topic", "") + + return err +} diff --git a/pkg/domain/entity/exchange.go b/pkg/domain/entity/exchange.go new file mode 100644 index 0000000..1c28ec5 --- /dev/null +++ b/pkg/domain/entity/exchange.go @@ -0,0 +1,12 @@ +package entity + +type ExchangeRate struct { + rage string + source string + target string +} + +func (a *ExchangeRate) ExchageTo(money Money) Money { + return Money{} + +} diff --git a/pkg/domain/entity/money.go b/pkg/domain/entity/money.go new file mode 100644 index 0000000..7ceca26 --- /dev/null +++ b/pkg/domain/entity/money.go @@ -0,0 +1,23 @@ +package entity + +type Money struct { + Amount float64 + Currency string +} + +func (a *Money) Less(money float64) bool { + if a.Amount < money { + return true + } + + return false + +} + +func (a *Money) Subtract(money float64) *Money { + return &Money{Amount: a.Amount - money, Currency: a.Currency} +} + +func (a *Money) Add(money float64) *Money { + return &Money{Amount: a.Amount + money, Currency: a.Currency} +} diff --git a/pkg/domain/entity/user.go b/pkg/domain/entity/user.go new file mode 100644 index 0000000..b4809a3 --- /dev/null +++ b/pkg/domain/entity/user.go @@ -0,0 +1,50 @@ +package entity + +import ( + "errors" + "gorm.io/plugin/soft_delete" + "time" +) + +//AccountEntity 用户模型 +type AccountEntity struct { + ID uint + CreatedAt time.Time + UpdatedAt time.Time + DeletedAt soft_delete.DeletedAt + Account string + TelNum string + Currency string + Amount *Money + DailyLimit *Money +} + +// 转出 +func (a *AccountEntity) Withdraw(money Money) error { + if a.Amount.Currency != money.Currency { + return errors.New("货币不对") + } + + if a.Amount.Less(money.Amount) { + return errors.New("余额不足") + } + + if a.DailyLimit.Less(money.Amount) { + return errors.New("当日余额不足") + } + + a.Amount = a.Amount.Subtract(money.Amount) + + return nil +} + +// 转入 +func (a *AccountEntity) Deposit(money Money) error { + if a.Amount.Currency != money.Currency { + return errors.New("货币不对") + } + + a.Amount = a.Amount.Add(money.Amount) + + return nil +} diff --git a/pkg/domain/service/transfer.go b/pkg/domain/service/transfer.go new file mode 100644 index 0000000..c1b2922 --- /dev/null +++ b/pkg/domain/service/transfer.go @@ -0,0 +1,19 @@ +package service + +import "dddexample/pkg/domain/entity" + +func Transfer(sourceAccount, targetAccount *entity.AccountEntity, money entity.Money, exchangeRate *entity.ExchangeRate) (err error) { + var sourceMoney = exchangeRate.ExchageTo(money) + + err = targetAccount.Deposit(money) //转入 + if err != nil { + return err + } + + err = sourceAccount.Withdraw(sourceMoney) //转出 + if err != nil { + return err + } + + return +} diff --git a/pkg/infrastructure/externalimp/http.go b/pkg/infrastructure/externalimp/http.go new file mode 100644 index 0000000..20e08cb --- /dev/null +++ b/pkg/infrastructure/externalimp/http.go @@ -0,0 +1,34 @@ +package externalimp + +import "dddexample/pkg/domain/entity" + +type ExchangeRage struct { +} + +func (a *ExchangeRage) GetExchangeRage(nowCurrency, nextCurrent string) (*entity.ExchangeRate, error) { + /*url := "https://ms.fontree.cn/mgmt/pricing/artworkPrice?tfnum=" + artworkNum + res, err := http.Get(url) + + if err != nil { + fmt.Println("请求错误", url, err) + return nil, err + } + + defer res.Body.Close() + if err != nil { + return nil, err + } + b, err := io.ReadAll(res.Body) + if err != nil { + return nil, err + } + + err = json.Unmarshal(b, &work) + if err != nil { + return nil, err + } + */ + + return &entity.ExchangeRate{}, nil + +} diff --git a/pkg/infrastructure/externalimp/http_test.go b/pkg/infrastructure/externalimp/http_test.go new file mode 100644 index 0000000..7573a84 --- /dev/null +++ b/pkg/infrastructure/externalimp/http_test.go @@ -0,0 +1,35 @@ +package externalimp + +import ( + "dddexample/pkg/domain/entity" + "reflect" + "testing" +) + +func TestExchangeRage_GetExchangeRage(t *testing.T) { + type args struct { + nowCurrency string + nextCurrent string + } + tests := []struct { + name string + args args + want *entity.ExchangeRate + wantErr bool + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + a := &ExchangeRage{} + got, err := a.GetExchangeRage(tt.args.nowCurrency, tt.args.nextCurrent) + if (err != nil) != tt.wantErr { + t.Errorf("GetExchangeRage() error = %v, wantErr %v", err, tt.wantErr) + return + } + if !reflect.DeepEqual(got, tt.want) { + t.Errorf("GetExchangeRage() got = %v, want %v", got, tt.want) + } + }) + } +} diff --git a/pkg/infrastructure/externalimp/kafka.go b/pkg/infrastructure/externalimp/kafka.go new file mode 100644 index 0000000..7ba40e4 --- /dev/null +++ b/pkg/infrastructure/externalimp/kafka.go @@ -0,0 +1,33 @@ +package externalimp + +import ( + "fmt" + "github.com/IBM/sarama" +) + +type KafkaQueue struct { +} + +func (a *KafkaQueue) SendMsg(key, info string) error { + config := sarama.NewConfig() + config.Producer.RequiredAcks = sarama.WaitForAll + config.Producer.Retry.Max = 5 + config.Producer.Return.Successes = true + + producer, err := sarama.NewSyncProducer([]string{"localhost:9092"}, config) + if err != nil { + fmt.Println("Failed to create producer:", err) + return err + } + + defer producer.Close() + + message := &sarama.ProducerMessage{ + Topic: key, + Value: sarama.StringEncoder(info), + } + _, _, err = producer.SendMessage(message) + + return err + +} diff --git a/pkg/infrastructure/model/common.go b/pkg/infrastructure/model/common.go new file mode 100644 index 0000000..eb99ddd --- /dev/null +++ b/pkg/infrastructure/model/common.go @@ -0,0 +1,13 @@ +package model + +func SelectByUserId(id int) Account { + var obj Account + DB.Model(&Account{}).Find(&obj,id) + return obj +} + +func SelectByAccountNumber(phone string) Account { + var obj Account + DB.Model(&Account{}).Where(&Account{TelNum: phone}).Find(&obj) + return obj +} \ No newline at end of file diff --git a/pkg/infrastructure/model/init.go b/pkg/infrastructure/model/init.go new file mode 100644 index 0000000..f92f450 --- /dev/null +++ b/pkg/infrastructure/model/init.go @@ -0,0 +1,56 @@ +package model + +import ( + "fmt" + "strings" + "time" + + "gorm.io/driver/mysql" + "gorm.io/gorm" + "gorm.io/gorm/schema" +) + +var DB *gorm.DB + +type MysqlConfig struct { + Db string + DbHost string + DbPort string + DbUser string + DbPassWord string + DbName string +} + +func LoadEnv(config MysqlConfig) { + + //MySQL数据库 + path := strings.Join([]string{config.DbUser, ":", config.DbPassWord, "@tcp(", config.DbHost, ":", + config.DbPort, ")/", config.DbName, "?charset=utf8&parseTime=true&loc=Local"}, "") + + fmt.Println(path) + //连接数据库 + Database(path) +} + +func Database(conn string) { + db, err := gorm.Open(mysql.New(mysql.Config{ + DSN: conn, // DSN data source name + DefaultStringSize: 256, // string 类型字段的默认长度 + DisableDatetimePrecision: true, // 禁用 datetime 精度，MySQL 5.6 之前的数据库不支持 + DontSupportRenameIndex: true, // 重命名索引时采用删除并新建的方式，MySQL 5.7 之前的数据库和 MariaDB 不支持重命名索引 + DontSupportRenameColumn: true, // 用 `change` 重命名列，MySQL 8 之前的数据库和 MariaDB 不支持重命名列 + SkipInitializeWithVersion: false, // 根据版本自动配置 + }), &gorm.Config{ + NamingStrategy: schema.NamingStrategy{ + SingularTable: true, + }, + }) + if err != nil { + panic(err) + } + sqlDB, _ := db.DB() + sqlDB.SetMaxIdleConns(20) //设置连接池，空闲 + sqlDB.SetMaxOpenConns(100) //打开 + sqlDB.SetConnMaxLifetime(time.Second * 30) + DB = db +} diff --git a/pkg/infrastructure/model/user.go b/pkg/infrastructure/model/user.go new file mode 100644 index 0000000..b377b4d --- /dev/null +++ b/pkg/infrastructure/model/user.go @@ -0,0 +1,19 @@ +package model + +import ( + "gorm.io/plugin/soft_delete" + "time" +) + +//Account 用户模型 +type Account struct { + ID uint `gorm:"primarykey"` + CreatedAt time.Time + UpdatedAt time.Time + DeletedAt soft_delete.DeletedAt `gorm:"column:deleted_at;type:int(11)" json:"deletedAt"` + Account string `gorm:"unique"` + TelNum string + Currency string + Amount float64 + DailyLimit float64 +} diff --git a/pkg/infrastructure/repositoryimp/user.go b/pkg/infrastructure/repositoryimp/user.go new file mode 100644 index 0000000..aa9347c --- /dev/null +++ b/pkg/infrastructure/repositoryimp/user.go @@ -0,0 +1,30 @@ +package repositoryimp + +import ( + "dddexample/pkg/domain/entity" + "dddexample/pkg/infrastructure/model" +) + +type UserRepositoryImp struct { +} + +func (l *UserRepositoryImp) SelectByID(id int) *entity.AccountEntity { + var accountObj model.Account + + model.DB.Model(&model.Account{}).Find(&accountObj, id) + + return &entity.AccountEntity{Account: accountObj.Account} +} + +func (l *UserRepositoryImp) SelectByAccountNumber(account string) *entity.AccountEntity { + var accountObj model.Account + + model.DB.Model(&model.Account{}).Where(&model.Account{Account: account}).Find(&accountObj) + + return &entity.AccountEntity{Account: accountObj.Account} +} + +//更新 +func (l *UserRepositoryImp) UpdateAccountMoney(*entity.AccountEntity) { + return +} diff --git a/pkg/interfaces/transfer.go b/pkg/interfaces/transfer.go new file mode 100644 index 0000000..68d00ff --- /dev/null +++ b/pkg/interfaces/transfer.go @@ -0,0 +1,20 @@ +package interfaces + +import ( + "dddexample/common/vo" + "dddexample/normal/service" + "github.com/gin-gonic/gin" + "github.com/gin-gonic/gin/binding" +) + +// Transfer 创建订单 +func Transfer(c *gin.Context) { + var req vo.TransferRequest + + if err := c.ShouldBindBodyWith(&req, binding.JSON); err != nil { + return + } + + service.Transfer(req.SourceUserId, req.TargetAccountNumber, req.TargetAmount, req.TargetCurrency) + return +}