307 lines
7.2 KiB
Go
307 lines
7.2 KiB
Go
// Package mysql ...
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//
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// Description : mysql客户端
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2021-03-01 9:20 下午
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package mysql
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import (
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"errors"
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"fmt"
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"path/filepath"
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"strings"
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"sync"
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"git.zhangdeman.cn/zhangdeman/util"
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"git.zhangdeman.cn/zhangdeman/logger/wrapper"
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"github.com/gin-gonic/gin"
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"go.uber.org/zap"
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gormLogger "gorm.io/gorm/logger"
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"gorm.io/driver/mysql"
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"gorm.io/gorm"
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)
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var (
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// Client mysql客户端
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Client *client
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)
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func init() {
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Client = &client{
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lock: &sync.RWMutex{},
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clientTable: make(map[string]*DBClient),
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}
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}
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type client struct {
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lock *sync.RWMutex
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clientTable map[string]*DBClient
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logger *zap.Logger
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}
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// AddWithConfigFile 使用文件生成新的客户端，文件名去掉后缀作为flag
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 19:19 2022/6/5
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func (c *client) AddWithConfigFile(cfgFilePath string, logInstance *zap.Logger) error {
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var (
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err error
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cfg *cfgFile
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dbClient *DBClient
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)
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if cfg, err = c.getCfg(cfgFilePath); nil != err {
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return err
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}
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if nil == cfg {
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// 不支持的配置文件格式
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return nil
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}
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dbClient = &DBClient{
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dbFlag: cfg.Flag,
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loggerInstance: logInstance,
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master: nil,
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slave: nil,
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extraFieldList: nil,
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cfg: Mysql{},
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}
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if dbClient.master, err = c.GetDatabaseClient(cfg.Config.Master, logInstance); nil != err {
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return err
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}
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if dbClient.slave, err = c.GetDatabaseClient(cfg.Config.Slave, logInstance); nil != err {
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return err
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}
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c.lock.Lock()
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c.clientTable[dbClient.dbFlag] = dbClient
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c.lock.Unlock()
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return nil
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}
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// BatchAddWithConfigDir 自动读取目录下配置文件, 生成客户端
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 19:19 2022/6/5
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func (c *client) BatchAddWithConfigDir(cfgDir string, logInstance *zap.Logger) error {
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filepathNames, _ := filepath.Glob(filepath.Join(cfgDir, "*"))
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for i := range filepathNames {
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if err := c.AddWithConfigFile(filepathNames[i], logInstance); nil != err {
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return err
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}
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}
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return nil
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}
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// getCfg 读取配置
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:05 2022/6/11
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func (c *client) getCfg(cfgPath string) (*cfgFile, error) {
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fileArr := strings.Split(cfgPath, ".")
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if len(fileArr) < 2 {
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// 获取不到类型
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return nil, errors.New("文件格式必须是JSON或者YAML")
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}
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fileType := strings.ToLower(fileArr[len(fileArr)-1])
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fileFlagArr := strings.Split(fileArr[0], string(filepath.Separator))
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result := &cfgFile{
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Path: cfgPath,
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Type: "",
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Flag: fileFlagArr[len(fileFlagArr)-1],
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Config: Database{},
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}
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var (
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err error
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cfgInfo Database
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)
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switch fileType {
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case FileTypeYaml:
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fallthrough
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case FileTypeYml:
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result.Type = FileTypeYaml
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if err = util.File.ReadYmlContent(cfgPath, &result.Config); nil != err {
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return nil, fmt.Errorf("%s 配置文件解析失败, 原因 : %s", cfgPath, err.Error())
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}
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case FileTypeJson:
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result.Type = FileTypeJson
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if err = util.File.ReadJSONContent(cfgPath, &cfgInfo); nil != err {
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return nil, fmt.Errorf("%s 配置文件解析失败, 原因 : %s", cfgPath, err.Error())
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}
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default:
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// 不是JSON , 也不是YML, 跳过
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return nil, nil
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}
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if len(result.Config.Master.Timezone) == 0 {
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// 默认使用本地时区
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result.Config.Master.Timezone = "Local"
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} else {
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result.Config.Slave.Timezone = result.Config.Master.Timezone
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}
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return result, nil
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}
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// GetDBClient 获取db client
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 19:32 2022/6/5
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func (c *client) GetDBClient(dbFlag string) (*DBClient, error) {
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c.lock.RLock()
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defer c.lock.RUnlock()
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var (
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exist bool
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dbClient *DBClient
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)
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if dbClient, exist = c.clientTable[dbFlag]; !exist {
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return nil, fmt.Errorf("%s 标识的数据库实例不存在! ", dbFlag)
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}
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return dbClient, nil
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}
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// GetMasterClient 获取主库客户端
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 19:36 2022/6/5
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func (c *client) GetMasterClient(ctx *gin.Context, dbFlag string) (*gorm.DB, error) {
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var (
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err error
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dbClient *DBClient
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)
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if dbClient, err = c.GetDBClient(dbFlag); nil != err {
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return nil, err
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}
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session := dbClient.master.Session(&gorm.Session{})
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session.Logger = dbClient.getLogger(ctx, session, dbFlag+"-master")
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return session, nil
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}
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// GetSlaveClient 获取从库客户端
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 19:37 2022/6/5
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func (c *client) GetSlaveClient(ctx *gin.Context, dbFlag string) (*gorm.DB, error) {
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var (
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err error
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dbClient *DBClient
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)
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if dbClient, err = c.GetDBClient(dbFlag); nil != err {
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return nil, err
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}
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session := dbClient.slave.Session(&gorm.Session{})
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session.Logger = dbClient.getLogger(ctx, session, dbFlag+"-slave")
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return session, nil
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}
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// getGormClient 获取GORM client方法
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 11:24 2022/6/6
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func (c *client) getGormClient() (*gorm.DB, error) {
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return nil, nil
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}
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// GetDatabaseClient 获取数据库连接
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:41 2022/6/11
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func (c *client) GetDatabaseClient(conf *Mysql, logInstance *zap.Logger) (*gorm.DB, error) {
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var (
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instance *gorm.DB
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err error
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)
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if instance, err = gorm.Open(mysql.Open(c.buildConnectionDSN(conf)), &gorm.Config{}); nil != err {
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return nil, err
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}
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instance.Logger = wrapper.NewGormLoggerWithInstance(nil, instance, logInstance, "", nil)
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return instance, nil
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}
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// buildConnectionDSN 构建连接信息
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:42 2022/6/11
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func (c *client) buildConnectionDSN(conf *Mysql) string {
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return fmt.Sprintf(
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"%s:%s@tcp(%s:%d)/%s?charset=%s&parseTime=True&loc=%s",
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conf.Username,
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conf.Password,
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conf.Host,
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conf.Port,
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conf.Database,
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conf.Charset,
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conf.Timezone,
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)
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}
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// DBClient 包装日志实例
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 3:09 PM 2021/12/24
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type DBClient struct {
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dbFlag string // 数据库标识
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loggerInstance *zap.Logger // 日志实例
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master *gorm.DB // 主库
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slave *gorm.DB // 从库
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extraFieldList []string // 提取的字段
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cfg Mysql // 数据库配置
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}
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// SetFlag 设置数据库标识
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 16:18 2022/6/5
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func (dc *DBClient) SetFlag(dbFlag string) {
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dc.dbFlag = dbFlag
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}
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// GetMaster 获取主库连接
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 3:28 PM 2021/12/24
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func (dc *DBClient) GetMaster(ctx *gin.Context) *gorm.DB {
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session := dc.master.Session(&gorm.Session{})
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session.Logger = dc.getLogger(ctx, session, "slave")
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return session
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}
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// GetSlave 获取从库链接
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 3:29 PM 2021/12/24
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func (dc *DBClient) GetSlave(ctx *gin.Context) *gorm.DB {
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session := dc.slave.Session(&gorm.Session{})
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session.Logger = dc.getLogger(ctx, session, "slave")
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return session
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}
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// getLogger 获取日志实例
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 3:45 PM 2021/12/24
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func (dc *DBClient) getLogger(ctx *gin.Context, dbClient *gorm.DB, node string) gormLogger.Interface {
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return wrapper.NewGormLoggerWithInstance(ctx, dbClient, dc.loggerInstance, node, dc.extraFieldList)
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}
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