/
conn.go
217 lines (197 loc) · 6.3 KB
/
conn.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package apmsql // import "go.elastic.co/apm/module/apmsql"
import (
"context"
"database/sql/driver"
"errors"
"go.elastic.co/apm"
)
func newConn(in driver.Conn, d *tracingDriver, dsnInfo DSNInfo) driver.Conn {
conn := &conn{Conn: in, driver: d}
conn.dsnInfo = dsnInfo
conn.namedValueChecker, _ = in.(namedValueChecker)
conn.pinger, _ = in.(driver.Pinger)
conn.queryer, _ = in.(driver.Queryer)
conn.queryerContext, _ = in.(driver.QueryerContext)
conn.connPrepareContext, _ = in.(driver.ConnPrepareContext)
conn.execer, _ = in.(driver.Execer)
conn.execerContext, _ = in.(driver.ExecerContext)
conn.connBeginTx, _ = in.(driver.ConnBeginTx)
conn.connGo110.init(in)
conn.connGo115.init(in)
if in, ok := in.(driver.ConnBeginTx); ok {
return &connBeginTx{conn, in}
}
return conn
}
type conn struct {
driver.Conn
connGo110
connGo115
driver *tracingDriver
dsnInfo DSNInfo
namedValueChecker namedValueChecker
pinger driver.Pinger
queryer driver.Queryer
queryerContext driver.QueryerContext
connPrepareContext driver.ConnPrepareContext
execer driver.Execer
execerContext driver.ExecerContext
connBeginTx driver.ConnBeginTx
}
func (c *conn) startStmtSpan(ctx context.Context, stmt, spanType string) (*apm.Span, context.Context) {
return c.startSpan(ctx, c.driver.querySignature(stmt), spanType, stmt)
}
func (c *conn) startSpan(ctx context.Context, name, spanType, stmt string) (*apm.Span, context.Context) {
span, ctx := apm.StartSpan(ctx, name, spanType)
if !span.Dropped() {
if c.dsnInfo.Address != "" {
span.Context.SetDestinationAddress(c.dsnInfo.Address, c.dsnInfo.Port)
span.Context.SetDestinationService(apm.DestinationServiceSpanContext{
Name: c.driver.driverName,
Resource: c.driver.driverName,
})
}
span.Context.SetDatabase(apm.DatabaseSpanContext{
Instance: c.dsnInfo.Database,
Statement: stmt,
Type: "sql",
User: c.dsnInfo.User,
})
}
return span, ctx
}
func (c *conn) finishSpan(ctx context.Context, span *apm.Span, result *driver.Result, resultError *error) {
if *resultError == driver.ErrSkip {
// TODO(axw) mark span as abandoned,
// so it's not sent and not counted
// in the span limit. Ideally remove
// from the slice so memory is kept
// in check.
return
}
switch *resultError {
case nil:
if !span.Dropped() && result != nil && *result != nil && *result != driver.ResultNoRows {
rowsAffected, err := (*result).RowsAffected()
if err == nil && rowsAffected >= 0 {
span.Context.SetDatabaseRowsAffected(rowsAffected)
}
}
case driver.ErrBadConn, context.Canceled:
// ErrBadConn is used by the connection pooling
// logic in database/sql, and so is expected and
// should not be reported.
//
// context.Canceled means the callers canceled
// the operation, so this is also expected.
default:
if e := apm.CaptureError(ctx, *resultError); e != nil {
e.Send()
}
}
span.End()
}
func (c *conn) Ping(ctx context.Context) (resultError error) {
if c.pinger == nil {
return nil
}
span, ctx := c.startSpan(ctx, "ping", c.driver.pingSpanType, "")
defer c.finishSpan(ctx, span, nil, &resultError)
return c.pinger.Ping(ctx)
}
func (c *conn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (_ driver.Rows, resultError error) {
if c.queryerContext == nil && c.queryer == nil {
return nil, driver.ErrSkip
}
span, ctx := c.startStmtSpan(ctx, query, c.driver.querySpanType)
defer c.finishSpan(ctx, span, nil, &resultError)
if c.queryerContext != nil {
return c.queryerContext.QueryContext(ctx, query, args)
}
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
select {
default:
case <-ctx.Done():
return nil, ctx.Err()
}
return c.queryer.Query(query, dargs)
}
func (*conn) Query(query string, args []driver.Value) (driver.Rows, error) {
return nil, errors.New("Query should never be called")
}
func (c *conn) PrepareContext(ctx context.Context, query string) (_ driver.Stmt, resultError error) {
span, ctx := c.startStmtSpan(ctx, query, c.driver.prepareSpanType)
defer c.finishSpan(ctx, span, nil, &resultError)
var stmt driver.Stmt
var err error
if c.connPrepareContext != nil {
stmt, err = c.connPrepareContext.PrepareContext(ctx, query)
} else {
stmt, err = c.Prepare(query)
if err == nil {
select {
default:
case <-ctx.Done():
stmt.Close()
return nil, ctx.Err()
}
}
}
if stmt != nil {
stmt = newStmt(stmt, c, query)
}
return stmt, err
}
func (c *conn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (result driver.Result, resultError error) {
if c.execerContext == nil && c.execer == nil {
return nil, driver.ErrSkip
}
span, ctx := c.startStmtSpan(ctx, query, c.driver.execSpanType)
defer c.finishSpan(ctx, span, &result, &resultError)
if c.execerContext != nil {
return c.execerContext.ExecContext(ctx, query, args)
}
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
select {
default:
case <-ctx.Done():
return nil, ctx.Err()
}
return c.execer.Exec(query, dargs)
}
func (*conn) Exec(query string, args []driver.Value) (driver.Result, error) {
return nil, errors.New("Exec should never be called")
}
func (c *conn) CheckNamedValue(nv *driver.NamedValue) error {
return checkNamedValue(nv, c.namedValueChecker)
}
type connBeginTx struct {
*conn
connBeginTx driver.ConnBeginTx
}
func (c *connBeginTx) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
// TODO(axw) instrument commit/rollback?
return c.connBeginTx.BeginTx(ctx, opts)
}