关于golang:学习笔记带你十天轻松搞定-Go-微服务系列四-产品服务

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1、学习课程

带你十天轻松搞定 Go 微服务系列（四）

2、产品服务（product）

进入服务工作区 

$ cd mall/service/product

2.1 生成 product model 模型

创立 sql 文件 

$ vim model/product.sql

编写 sql 文件 

CREATE TABLE `product` (
 `id` bigint unsigned NOT NULL AUTO_INCREMENT,
 `name` varchar(255)  NOT NULL DEFAULT ''COMMENT' 产品名称 ',
 `desc` varchar(255)  NOT NULL DEFAULT ''COMMENT' 产品描述 ',
        `stock` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '产品库存',
 `amount` int(10) unsigned NOT NULL DEFAULT '0'  COMMENT '产品金额',
 `status` tinyint(3) unsigned NOT NULL DEFAULT '0' COMMENT '产品状态',
 `create_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
 `update_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4;

运行模板生成命令（和昨天一样要在 golang 容器下运行）

$ goctl model mysql ddl -src ./model/product.sql -dir ./model -c

2.2 生成 product api 服务

创立 api 文件 

$ vim api/product.api

编写 api 文件 

type (
 // 产品创立
 CreateRequest {
  Name   string `json:"name"`
  Desc   string `json:"desc"`
  Stock  int64  `json:"stock"`
  Amount int64  `json:"amount"`
  Status int64  `json:"status"`
 }
 CreateResponse {Id int64 `json:"id"`}
 // 产品创立

 // 产品批改
 UpdateRequest {
  Id     int64  `json:"id"`
  Name   string `json:"name,optional"`
  Desc   string `json:"desc,optional"`
  Stock  int64  `json:"stock"`
  Amount int64  `json:"amount,optional"`
  Status int64  `json:"status,optional"`
 }
 UpdateResponse { }
 // 产品批改

 // 产品删除
 RemoveRequest {Id int64 `json:"id"`}
 RemoveResponse { }
 // 产品删除

 // 产品详情
 DetailRequest {Id int64 `json:"id"`}
 DetailResponse {
  Id     int64  `json:"id"`
  Name   string `json:"name"`
  Desc   string `json:"desc"`
  Stock  int64  `json:"stock"`
  Amount int64  `json:"amount"`
  Status int64  `json:"status"`
 }
 // 产品详情
)

@server(jwt: Auth)
service Product {
 @handler Create
 post /api/product/create(CreateRequest) returns (CreateResponse)
 
 @handler Update
 post /api/product/update(UpdateRequest) returns (UpdateResponse)
 
 @handler Remove
 post /api/product/remove(RemoveRequest) returns (RemoveResponse)
 
 @handler Detail
 post /api/product/detail(DetailRequest) returns (DetailResponse)
}

运行模板生成命令（一样要在 golang 容器下运行）

$ goctl api go -api ./api/product.api -dir ./api

2.3 生成 product rpc 服务

创立 proto 文件 

$ vim rpc/product.proto

编写 proto 文件 

syntax = "proto3";

package productclient;

option go_package = "product";

// 产品创立
message CreateRequest {
    string Name = 1;
    string Desc = 2;
    int64 Stock = 3;
    int64 Amount = 4;
    int64 Status = 5;
}
message CreateResponse {int64 id = 1;}
// 产品创立

// 产品批改
message UpdateRequest {
    int64 id = 1;
    string Name = 2;
    string Desc = 3;
    int64 Stock = 4;
    int64 Amount = 5;
    int64 Status = 6;
}
message UpdateResponse {
}
// 产品批改

// 产品删除
message RemoveRequest {int64 id = 1;}
message RemoveResponse {
}
// 产品删除

// 产品详情
message DetailRequest {int64 id = 1;}
message DetailResponse {
    int64 id = 1;
    string Name = 2;
    string Desc = 3;
    int64 Stock = 4;
    int64 Amount = 5;
    int64 Status = 6;
}
// 产品详情

service Product {rpc Create(CreateRequest) returns(CreateResponse);
    rpc Update(UpdateRequest) returns(UpdateResponse);
    rpc Remove(RemoveRequest) returns(RemoveResponse);
    rpc Detail(DetailRequest) returns(DetailResponse);
}

运行模板生成命令（一样要在 golang 容器下运行）

$ goctl rpc proto -src ./rpc/product.proto -dir ./rpc

2.4 编写 product rpc 服务

2.4.1 批改配置文件

批改 product.yaml 配置文件 

$ vim rpc/etc/product.yaml

批改服务监听地址，端口号为 0.0.0.0:9001，Etcd 服务配置，Mysql 服务配置，CacheRedis 服务配置 

Name: product.rpc
ListenOn: 0.0.0.0:9001

Etcd:
  Hosts:
  - etcd:2379
  Key: product.rpc

Mysql:
  DataSource: root:123456@tcp(mysql:3306)/mall?charset=utf8mb4&parseTime=true&loc=Asia%2FShanghai

CacheRedis:
- Host: redis:6379
  Type: node # node 能够不写，能够设为 cluster
  # Pass: xxx # 如果有明码

2.4.2 增加 product model 依赖

增加 Mysql 服务配置，CacheRedis 服务配置的实例化 

$ vim rpc/internal/config/config.go
package config

import (
 "github.com/zeromicro/go-zero/core/stores/cache"
 "github.com/zeromicro/go-zero/zrpc"
)

type Config struct {
 zrpc.RpcServerConf

 Mysql struct {DataSource string}
  
 CacheRedis cache.CacheConf
}

注册服务上下文 product model 的依赖 

$ vim rpc/internal/svc/servicecontext.go
package svc

import (
 "mall/service/product/model"
 "mall/service/product/rpc/internal/config"

 "github.com/zeromicro/go-zero/core/stores/sqlx"
)

type ServiceContext struct {
 Config config.Config
    
 ProductModel model.ProductModel
}

func NewServiceContext(c config.Config) *ServiceContext {conn := sqlx.NewMysql(c.Mysql.DataSource)
 return &ServiceContext{
  Config:       c,
  ProductModel: model.NewProductModel(conn, c.CacheRedis),
 }
}

2.4.3 增加产品创立逻辑 Create

$ vim rpc/internal/logic/createlogic.go
package logic

import (
 "context"

 "mall/service/product/model"
 "mall/service/product/rpc/internal/svc"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
 "google.golang.org/grpc/status"
)

type CreateLogic struct {
 ctx    context.Context
 svcCtx *svc.ServiceContext
 logx.Logger
}

func NewCreateLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CreateLogic {
 return &CreateLogic{
  ctx:    ctx,
  svcCtx: svcCtx,
  Logger: logx.WithContext(ctx),
 }
}

func (l *CreateLogic) Create(in *product.CreateRequest) (*product.CreateResponse, error) {
 newProduct := model.Product{
  Name:   in.Name,
  Desc:   in.Desc,
  Stock:  in.Stock,
  Amount: in.Amount,
  Status: in.Status,
 }

 res, err := l.svcCtx.ProductModel.Insert(&newProduct)
 if err != nil {return nil, status.Error(500, err.Error())
 }

 newProduct.Id, err = res.LastInsertId()
 if err != nil {return nil, status.Error(500, err.Error())
 }

 return &product.CreateResponse{Id: newProduct.Id,}, nil
}

2.4.4 增加产品详情逻辑 Detail

$ vim rpc/internal/logic/detaillogic.go
package logic

import (
 "context"

 "mall/service/product/model"
 "mall/service/product/rpc/internal/svc"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
 "google.golang.org/grpc/status"
)

type DetailLogic struct {
 ctx    context.Context
 svcCtx *svc.ServiceContext
 logx.Logger
}

func NewDetailLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DetailLogic {
 return &DetailLogic{
  ctx:    ctx,
  svcCtx: svcCtx,
  Logger: logx.WithContext(ctx),
 }
}

func (l *DetailLogic) Detail(in *product.DetailRequest) (*product.DetailResponse, error) {
 // 查问产品是否存在
 res, err := l.svcCtx.ProductModel.FindOne(in.Id)
 if err != nil {
  if err == model.ErrNotFound {return nil, status.Error(100, "产品不存在")
  }
  return nil, status.Error(500, err.Error())
 }

 return &product.DetailResponse{
  Id:     res.Id,
  Name:   res.Name,
  Desc:   res.Desc,
  Stock:  res.Stock,
  Amount: res.Amount,
  Status: res.Status,
 }, nil
}

2.4.5 增加产品更新逻辑 Update

$ vim rpc/internal/logic/updatelogic.go
package logic

import (
 "context"

 "mall/service/product/model"
 "mall/service/product/rpc/internal/svc"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
 "google.golang.org/grpc/status"
)

type UpdateLogic struct {
 ctx    context.Context
 svcCtx *svc.ServiceContext
 logx.Logger
}

func NewUpdateLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UpdateLogic {
 return &UpdateLogic{
  ctx:    ctx,
  svcCtx: svcCtx,
  Logger: logx.WithContext(ctx),
 }
}

func (l *UpdateLogic) Update(in *product.UpdateRequest) (*product.UpdateResponse, error) {
 // 查问产品是否存在
 res, err := l.svcCtx.ProductModel.FindOne(in.Id)
 if err != nil {
  if err == model.ErrNotFound {return nil, status.Error(100, "产品不存在")
  }
  return nil, status.Error(500, err.Error())
 }

 if in.Name != "" {res.Name = in.Name}
 if in.Desc != "" {res.Desc = in.Desc}
 if in.Stock != 0 {res.Stock = in.Stock}
 if in.Amount != 0 {res.Amount = in.Amount}
 if in.Status != 0 {res.Status = in.Status}

 err = l.svcCtx.ProductModel.Update(res)
 if err != nil {return nil, status.Error(500, err.Error())
 }

 return &product.UpdateResponse{}, nil}

2.4.6 增加产品删除逻辑 Remove

$ vim rpc/internal/logic/removelogic.go
package logic

import (
 "context"

 "mall/service/product/model"
 "mall/service/product/rpc/internal/svc"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
 "google.golang.org/grpc/status"
)

type RemoveLogic struct {
 ctx    context.Context
 svcCtx *svc.ServiceContext
 logx.Logger
}

func NewRemoveLogic(ctx context.Context, svcCtx *svc.ServiceContext) *RemoveLogic {
 return &RemoveLogic{
  ctx:    ctx,
  svcCtx: svcCtx,
  Logger: logx.WithContext(ctx),
 }
}

func (l *RemoveLogic) Remove(in *product.RemoveRequest) (*product.RemoveResponse, error) {
 // 查问产品是否存在
 res, err := l.svcCtx.ProductModel.FindOne(in.Id)
 if err != nil {
  if err == model.ErrNotFound {return nil, status.Error(100, "产品不存在")
  }
  return nil, status.Error(500, err.Error())
 }

 err = l.svcCtx.ProductModel.Delete(res.Id)
 if err != nil {return nil, status.Error(500, err.Error())
 }

 return &product.RemoveResponse{}, nil}

2.5 编写 product api 服务

2.5.1 批改配置文件

批改 product.yaml 配置文件 

$ vim api/etc/product.yaml

批改服务地址，端口号为 0.0.0.0:8001，Mysql 服务配置，CacheRedis 服务配置，Auth 验证配置 

Name: Product
Host: 0.0.0.0
Port: 8001

Mysql:
  DataSource: root:123456@tcp(mysql:3306)/mall?charset=utf8mb4&parseTime=true&loc=Asia%2FShanghai

CacheRedis:
- Host: redis:6379
  Type: node # node 能够不写，能够设为 cluster
  # Pass: xxx # 如果有明码

Auth:
  AccessSecret: uOvKLmVfztaXGpNYd4Z0I1SiT7MweJhl
  AccessExpire: 86400

2.5.2 增加 product rpc 依赖

增加 product rpc 服务配置 

$ vim api/etc/product.yaml
Name: Product
Host: 0.0.0.0
Port: 8001
...
ProductRpc:
  Etcd:
    Hosts:
    - etcd:2379
    Key: product.rpc

增加 product rpc 服务配置的实例化 

$ vim api/internal/config/config.go
package config

import (
 "github.com/zeromicro/go-zero/rest"
 "github.com/zeromicro/go-zero/zrpc"
)

type Config struct {
 rest.RestConf

 Auth struct {
  AccessSecret string
  AccessExpire int64
 }

 ProductRpc zrpc.RpcClientConf
}

注册服务上下文 product rpc 的依赖 

$ vim api/internal/svc/servicecontext.go
package svc

import (
 "mall/service/product/api/internal/config"
 "mall/service/product/rpc/productclient"

 "github.com/zeromicro/go-zero/zrpc"
)

type ServiceContext struct {
 Config config.Config
    
 ProductRpc productclient.Product
}

func NewServiceContext(c config.Config) *ServiceContext {
 return &ServiceContext{
  Config:     c,
  ProductRpc: productclient.NewProduct(zrpc.MustNewClient(c.ProductRpc)),
 }
}

2.5.3 增加产品创立逻辑 Create

$ vim api/internal/logic/createlogic.go
package logic

import (
 "context"

 "mall/service/product/api/internal/svc"
 "mall/service/product/api/internal/types"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
)

type CreateLogic struct {
 logx.Logger
 ctx    context.Context
 svcCtx *svc.ServiceContext
}

func NewCreateLogic(ctx context.Context, svcCtx *svc.ServiceContext) CreateLogic {
 return CreateLogic{Logger: logx.WithContext(ctx),
  ctx:    ctx,
  svcCtx: svcCtx,
 }
}

func (l *CreateLogic) Create(req types.CreateRequest) (resp *types.CreateResponse, err error) {
 res, err := l.svcCtx.ProductRpc.Create(l.ctx, &product.CreateRequest{
  Name:   req.Name,
  Desc:   req.Desc,
  Stock:  req.Stock,
  Amount: req.Amount,
  Status: req.Status,
 })
 if err != nil {return nil, err}

 return &types.CreateResponse{Id: res.Id,}, nil
}

2.5.4 增加产品详情逻辑 Detail

$ vim api/internal/logic/detaillogic.go
package logic

import (
 "context"

 "mall/service/product/api/internal/svc"
 "mall/service/product/api/internal/types"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
)

type DetailLogic struct {
 logx.Logger
 ctx    context.Context
 svcCtx *svc.ServiceContext
}

func NewDetailLogic(ctx context.Context, svcCtx *svc.ServiceContext) DetailLogic {
 return DetailLogic{Logger: logx.WithContext(ctx),
  ctx:    ctx,
  svcCtx: svcCtx,
 }
}

func (l *DetailLogic) Detail(req types.DetailRequest) (resp *types.DetailResponse, err error) {
 res, err := l.svcCtx.ProductRpc.Detail(l.ctx, &product.DetailRequest{Id: req.Id,})
 if err != nil {return nil, err}

 return &types.DetailResponse{
  Id:     res.Id,
  Name:   res.Name,
  Desc:   res.Desc,
  Stock:  res.Stock,
  Amount: res.Amount,
  Status: res.Status,
 }, nil
}

2.5.5 增加产品更新逻辑 Update

$ vim api/internal/logic/updatelogic.go
package logic

import (
 "context"

 "mall/service/product/api/internal/svc"
 "mall/service/product/api/internal/types"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
)

type UpdateLogic struct {
 logx.Logger
 ctx    context.Context
 svcCtx *svc.ServiceContext
}

func NewUpdateLogic(ctx context.Context, svcCtx *svc.ServiceContext) UpdateLogic {
 return UpdateLogic{Logger: logx.WithContext(ctx),
  ctx:    ctx,
  svcCtx: svcCtx,
 }
}

func (l *UpdateLogic) Update(req types.UpdateRequest) (resp *types.UpdateResponse, err error) {
 _, err = l.svcCtx.ProductRpc.Update(l.ctx, &product.UpdateRequest{
  Id:     req.Id,
  Name:   req.Name,
  Desc:   req.Desc,
  Stock:  req.Stock,
  Amount: req.Amount,
  Status: req.Status,
 })
 if err != nil {return nil, err}

 return &types.UpdateResponse{}, nil}

2.5.6 增加产品删除逻辑 Remove

$ vim api/internal/logic/removelogic.go
package logic

import (
 "context"

 "mall/service/product/api/internal/svc"
 "mall/service/product/api/internal/types"
 "mall/service/product/rpc/product"

 "github.com/zeromicro/go-zero/core/logx"
)

type RemoveLogic struct {
 logx.Logger
 ctx    context.Context
 svcCtx *svc.ServiceContext
}

func NewRemoveLogic(ctx context.Context, svcCtx *svc.ServiceContext) RemoveLogic {
 return RemoveLogic{Logger: logx.WithContext(ctx),
  ctx:    ctx,
  svcCtx: svcCtx,
 }
}

func (l *RemoveLogic) Remove(req types.RemoveRequest) (resp *types.RemoveResponse, err error) {
 _, err = l.svcCtx.ProductRpc.Remove(l.ctx, &product.RemoveRequest{Id: req.Id,})
 if err != nil {return nil, err}

 return &types.RemoveResponse{}, nil}

2.6 启动 product rpc 服务

提醒：启动服务须要在 golang 容器中启动 

$ cd mall/service/product/rpc
$ go run product.go -f etc/product.yaml

Starting rpc server at 127.0.0.1:9001…

2.7 启动 product api 服务

提醒：启动服务须要在 golang 容器中启动 

$ cd mall/service/product/api
$ go run product.go -f etc/product.yaml

Starting server at 0.0.0.0:8001…

正文完
golang
发表至： golang
2022-03-08
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