github.com/erda-project/erda-infra@v1.0.9/pkg/trace/inject/sql/driver.go (about)

     1  // Copyright (c) 2021 Terminus, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package sql
    16  
    17  import (
    18  	"context"
    19  	"database/sql/driver"
    20  )
    21  
    22  func wrapDriver(d driver.Driver) driver.Driver {
    23  	drv := &wrappedDriver{
    24  		driver: d,
    25  	}
    26  	if ctx, ok := d.(driver.DriverContext); ok {
    27  		return &wrappedDriverContext{
    28  			wrappedDriver: drv,
    29  			context:       ctx,
    30  		}
    31  	}
    32  	return drv
    33  }
    34  
    35  type wrappedDriver struct {
    36  	driver driver.Driver
    37  }
    38  
    39  func (d *wrappedDriver) Open(name string) (driver.Conn, error) {
    40  	conn, err := d.driver.Open(name)
    41  	if err != nil {
    42  		return nil, err
    43  	}
    44  	return &wrappedConn{
    45  		Conn: conn,
    46  	}, nil
    47  }
    48  
    49  type wrappedDriverContext struct {
    50  	*wrappedDriver
    51  	context driver.DriverContext
    52  }
    53  
    54  func (d *wrappedDriverContext) OpenConnector(name string) (driver.Connector, error) {
    55  	rawConnector, err := d.context.OpenConnector(name)
    56  	if err != nil {
    57  		return nil, err
    58  	}
    59  	return &wrappedConnector{
    60  		driver:    d,
    61  		connector: rawConnector,
    62  	}, err
    63  }
    64  
    65  type wrappedConnector struct {
    66  	driver    driver.Driver
    67  	connector driver.Connector
    68  }
    69  
    70  func (c *wrappedConnector) Connect(ctx context.Context) (driver.Conn, error) {
    71  	conn, err := c.connector.Connect(ctx)
    72  	if err != nil {
    73  		return nil, err
    74  	}
    75  	return &wrappedConn{
    76  		Conn: conn,
    77  	}, nil
    78  }
    79  
    80  func (c *wrappedConnector) Driver() driver.Driver {
    81  	return c.driver
    82  }