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
|
package beanstalk
import (
"context"
"net"
"sync"
"time"
"github.com/beanstalkd/go-beanstalk"
"github.com/cenkalti/backoff/v4"
"github.com/spiral/errors"
"github.com/spiral/roadrunner/v2/plugins/logger"
)
type ConnPool struct {
sync.RWMutex
log logger.Logger
conn *beanstalk.Conn
connT *beanstalk.Conn
ts *beanstalk.TubeSet
t *beanstalk.Tube
network string
address string
tName string
tout time.Duration
}
func NewConnPool(network, address, tName string, tout time.Duration, log logger.Logger) (*ConnPool, error) {
connT, err := beanstalk.DialTimeout(network, address, tout)
if err != nil {
return nil, err
}
connTS, err := beanstalk.DialTimeout(network, address, tout)
if err != nil {
return nil, err
}
tube := beanstalk.NewTube(connT, tName)
ts := beanstalk.NewTubeSet(connTS, tName)
return &ConnPool{
log: log,
network: network,
address: address,
tName: tName,
tout: tout,
conn: connTS,
connT: connT,
ts: ts,
t: tube,
}, nil
}
func (cp *ConnPool) Put(ctx context.Context, body []byte, pri uint32, delay, ttr time.Duration) (uint64, error) {
cp.RLock()
defer cp.RUnlock()
id, err := cp.t.Put(body, pri, delay, ttr)
if err != nil {
// errN contains both, err and internal checkAndRedial error
errN := cp.checkAndRedial(ctx, err)
if errN != nil {
return 0, errN
} else {
// retry put only when we redialed
return cp.t.Put(body, pri, delay, ttr)
}
}
return id, nil
}
// Reserve reserves and returns a job from one of the tubes in t. If no
// job is available before time timeout has passed, Reserve returns a
// ConnError recording ErrTimeout.
//
// Typically, a client will reserve a job, perform some work, then delete
// the job with Conn.Delete.
func (cp *ConnPool) Reserve(ctx context.Context, reserveTimeout time.Duration) (uint64, []byte, error) {
cp.RLock()
defer cp.RUnlock()
id, body, err := cp.ts.Reserve(reserveTimeout)
if err != nil {
// errN contains both, err and internal checkAndRedial error
errN := cp.checkAndRedial(ctx, err)
if errN != nil {
return 0, nil, errN
} else {
// retry Reserve only when we redialed
return cp.ts.Reserve(reserveTimeout)
}
}
return id, body, nil
}
func (cp *ConnPool) Delete(ctx context.Context, id uint64) error {
cp.RLock()
defer cp.RUnlock()
err := cp.conn.Delete(id)
if err != nil {
// errN contains both, err and internal checkAndRedial error
errN := cp.checkAndRedial(ctx, err)
if errN != nil {
return errN
} else {
// retry Delete only when we redialed
return cp.conn.Delete(id)
}
}
return nil
}
func (cp *ConnPool) redial(ctx context.Context) error {
const op = errors.Op("connection_pool_redial")
cp.Lock()
// backoff here
expb := backoff.WithContext(backoff.NewExponentialBackOff(), ctx)
operation := func() error {
connT, err := beanstalk.DialTimeout(cp.network, cp.address, cp.tout)
if err != nil {
return err
}
if connT == nil {
return errors.E(op, errors.Str("connectionT is nil"))
}
connTS, err := beanstalk.DialTimeout(cp.network, cp.address, cp.tout)
if err != nil {
return err
}
if connTS == nil {
return errors.E(op, errors.Str("connectionTS is nil"))
}
cp.t = beanstalk.NewTube(connT, cp.tName)
cp.ts = beanstalk.NewTubeSet(connTS, cp.tName)
cp.conn = connTS
cp.connT = connT
cp.log.Info("beanstalk redial was successful")
return nil
}
retryErr := backoff.Retry(operation, expb)
if retryErr != nil {
cp.Unlock()
return retryErr
}
cp.Unlock()
return nil
}
var connErrors = map[string]struct{}{"EOF": {}}
func (cp *ConnPool) checkAndRedial(ctx context.Context, err error) error {
const op = errors.Op("connection_pool_check_redial")
switch et := err.(type) { //nolint:gocritic
// check if the error
case beanstalk.ConnError:
switch bErr := et.Err.(type) {
case *net.OpError:
cp.RUnlock()
errR := cp.redial(ctx)
cp.RLock()
// if redial failed - return
if errR != nil {
return errors.E(op, errors.Errorf("%v:%v", bErr, errR))
}
// if redial was successful -> continue listening
return nil
default:
if _, ok := connErrors[et.Err.Error()]; ok {
// if error is related to the broken connection - redial
cp.RUnlock()
errR := cp.redial(ctx)
cp.RLock()
// if redial failed - return
if errR != nil {
return errors.E(op, errors.Errorf("%v:%v", err, errR))
}
// if redial was successful -> continue listening
return nil
}
}
}
// return initial error
return err
}
|
