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conn.go
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conn.go
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package driver
import (
"context"
"database/sql/driver"
"github.com/mattermost/mattermost/server/public/plugin"
)
// Conn is a DB driver conn implementation
// which executes queries using the Plugin DB API.
type Conn struct {
id string
api plugin.Driver
}
// driverConn is a super-interface combining the basic
// driver.Conn interface with some new additions later.
type driverConn interface {
driver.Conn
driver.ConnBeginTx
driver.ConnPrepareContext
driver.ExecerContext
driver.QueryerContext
driver.Pinger
}
var (
// Compile-time check to ensure Conn implements the interface.
_ driverConn = &Conn{}
)
func (c *Conn) Begin() (tx driver.Tx, err error) {
txID, err := c.api.Tx(c.id, driver.TxOptions{})
if err != nil {
return nil, err
}
t := &wrapperTx{
id: txID,
api: c.api,
}
return t, nil
}
func (c *Conn) BeginTx(_ context.Context, opts driver.TxOptions) (driver.Tx, error) {
txID, err := c.api.Tx(c.id, opts)
if err != nil {
return nil, err
}
t := &wrapperTx{
id: txID,
api: c.api,
}
return t, nil
}
func (c *Conn) Prepare(q string) (driver.Stmt, error) {
stID, err := c.api.Stmt(c.id, q)
if err != nil {
return nil, err
}
st := &wrapperStmt{
id: stID,
api: c.api,
}
return st, nil
}
func (c *Conn) PrepareContext(_ context.Context, q string) (driver.Stmt, error) {
stID, err := c.api.Stmt(c.id, q)
if err != nil {
return nil, err
}
st := &wrapperStmt{
id: stID,
api: c.api,
}
return st, nil
}
func (c *Conn) ExecContext(_ context.Context, q string, args []driver.NamedValue) (driver.Result, error) {
resultContainer, err := c.api.ConnExec(c.id, q, args)
if err != nil {
return nil, err
}
res := &wrapperResult{
res: resultContainer,
}
return res, nil
}
func (c *Conn) QueryContext(_ context.Context, q string, args []driver.NamedValue) (driver.Rows, error) {
rowsID, err := c.api.ConnQuery(c.id, q, args)
if err != nil {
return nil, err
}
rows := &wrapperRows{
id: rowsID,
api: c.api,
}
return rows, nil
}
func (c *Conn) Ping(_ context.Context) error {
return c.api.ConnPing(c.id)
}
func (c *Conn) Close() error {
return c.api.ConnClose(c.id)
}