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65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
package sqlx
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import (
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"database/sql"
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"io"
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"time"
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"github.com/zeromicro/go-zero/core/syncx"
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)
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const (
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maxIdleConns = 64
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maxOpenConns = 64
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maxLifetime = time.Minute
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)
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var connManager = syncx.NewResourceManager()
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func getCachedSqlConn(driverName, server string) (*sql.DB, error) {
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val, err := connManager.GetResource(server, func() (io.Closer, error) {
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conn, err := newDBConnection(driverName, server)
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if err != nil {
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return nil, err
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}
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return conn, nil
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})
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if err != nil {
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return nil, err
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}
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return val.(*sql.DB), nil
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}
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func getSqlConn(driverName, server string) (*sql.DB, error) {
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conn, err := getCachedSqlConn(driverName, server)
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if err != nil {
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return nil, err
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}
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return conn, nil
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}
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func newDBConnection(driverName, datasource string) (*sql.DB, error) {
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conn, err := sql.Open(driverName, datasource)
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if err != nil {
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return nil, err
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}
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// we need to do this until the issue https://github.com/golang/go/issues/9851 get fixed
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// discussed here https://github.com/go-sql-driver/mysql/issues/257
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// if the discussed SetMaxIdleTimeout methods added, we'll change this behavior
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// 8 means we can't have more than 8 goroutines to concurrently access the same database.
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conn.SetMaxIdleConns(maxIdleConns)
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conn.SetMaxOpenConns(maxOpenConns)
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conn.SetConnMaxLifetime(maxLifetime)
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if err := conn.Ping(); err != nil {
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_ = conn.Close()
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return nil, err
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}
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return conn, nil
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}
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