139 lines
3.1 KiB
Go
139 lines
3.1 KiB
Go
package mongos
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import (
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"context"
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"stat/common/log"
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"time"
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"go.mongodb.org/mongo-driver/bson"
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"go.mongodb.org/mongo-driver/x/mongo/driver/connstring"
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"go.mongodb.org/mongo-driver/mongo"
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"go.mongodb.org/mongo-driver/mongo/options"
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)
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var MgoManager *Manager
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type Options struct {
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Url string `json:"url"` // 数据库连接
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}
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// Manager 数据库连接管理器
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// 重置连接等
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type Manager struct {
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client *mongo.Client
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url string
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db string
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}
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func NewManager(url string) *Manager {
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return &Manager{url: url}
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}
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func (m *Manager) Database() *mongo.Database {
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return m.client.Database(m.db)
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}
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func (m *Manager) Connect() error {
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cs, err := connstring.Parse(m.url)
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if err != nil {
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log.Error("db connect parse err", log.E(err))
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return err
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}
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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client, err := mongo.Connect(ctx, options.Client().ApplyURI(m.url))
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if err != nil {
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log.Error("[warn] connect mongo db err", log.E(err))
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return err
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}
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if err = client.Ping(ctx, nil); err != nil {
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log.Error("[warn] ping mongo db err", log.E(err))
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return err
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}
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m.db = cs.Database
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m.client = client
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log.Info("mongos:Init ok!", log.Any("dbName", m.db), log.Any("dbHost", cs.Hosts))
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return nil
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}
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func (m *Manager) DisConnect() {
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if m.client != nil {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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if err := m.client.Disconnect(ctx); err != nil {
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log.Error("db disconnect err", log.E(err))
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}
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m.client = nil
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}
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}
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//Transaction 开启事务处理包裹处理,里面处理的全是利用的事务的ctx
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func (m *Manager) Transaction(ctx context.Context, fn func(sctx mongo.SessionContext) error) error {
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return m.client.UseSession(
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ctx,
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func(sctx mongo.SessionContext) error {
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return runTransactionWithRetry(sctx, func(ctx mongo.SessionContext) error {
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err := sctx.StartTransaction()
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if err != nil {
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return err
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}
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err = fn(sctx)
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if err != nil {
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sctx.AbortTransaction(sctx)
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return err
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}
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return commitWithRetry(sctx)
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})
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},
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)
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}
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func runTransactionWithRetry(sctx mongo.SessionContext, txnFn func(mongo.SessionContext) error) error {
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for {
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err := txnFn(sctx) // Performs transaction.
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if err == nil {
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return nil
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}
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// If transient error, retry the whole transaction
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if cmdErr, ok := err.(mongo.CommandError); ok && cmdErr.HasErrorLabel("TransientTransactionError") {
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continue
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}
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return err
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}
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}
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// commitWithRetry is an example function demonstrating transaction retry logic.
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func commitWithRetry(sctx mongo.SessionContext) error {
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for {
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err := sctx.CommitTransaction(sctx)
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switch e := err.(type) {
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case nil:
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return nil
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case mongo.CommandError:
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// Can retry commit
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if e.HasErrorLabel("UnknownTransactionCommitResult") {
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continue
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}
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return e
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default:
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return e
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}
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}
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}
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func Transaction(ctx context.Context, fn func(sctx mongo.SessionContext) error) error {
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return MgoManager.Transaction(ctx, fn)
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}
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func ToBsonM(v interface{}) bson.M {
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b, _ := bson.Marshal(v)
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var r = bson.M{}
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_ = bson.Unmarshal(b, &r)
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return r
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}
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