forked from vitessio/vitess
-
Notifications
You must be signed in to change notification settings - Fork 1
/
plain_controller.go
87 lines (72 loc) · 2.53 KB
/
plain_controller.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
// Copyright 2015, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package schemamanager
import (
"encoding/json"
"strings"
log "github.com/golang/glog"
"golang.org/x/net/context"
)
// PlainController implements Controller interface.
type PlainController struct {
sqls []string
keyspace string
}
// NewPlainController creates a new PlainController instance.
func NewPlainController(sqlStr string, keyspace string) *PlainController {
controller := &PlainController{
sqls: make([]string, 0, 32),
keyspace: keyspace,
}
for _, sql := range strings.Split(sqlStr, ";") {
s := strings.TrimSpace(sql)
if s != "" {
controller.sqls = append(controller.sqls, s)
}
}
return controller
}
// Open is a no-op.
func (controller *PlainController) Open(ctx context.Context) error {
return nil
}
// Read reads schema changes
func (controller *PlainController) Read(ctx context.Context) ([]string, error) {
return controller.sqls, nil
}
// Close is a no-op.
func (controller *PlainController) Close() {
}
// Keyspace returns keyspace to apply schema.
func (controller *PlainController) Keyspace() string {
return controller.keyspace
}
// OnReadSuccess is called when schemamanager successfully
// reads all sql statements.
func (controller *PlainController) OnReadSuccess(ctx context.Context) error {
log.Info("Successfully read all schema changes.")
return nil
}
// OnReadFail is called when schemamanager fails to read all sql statements.
func (controller *PlainController) OnReadFail(ctx context.Context, err error) error {
log.Errorf("Failed to read schema changes, error: %v\n", err)
return err
}
// OnValidationSuccess is called when schemamanager successfully validates all sql statements.
func (controller *PlainController) OnValidationSuccess(ctx context.Context) error {
log.Info("Successfully validated all SQL statements.")
return nil
}
// OnValidationFail is called when schemamanager fails to validate sql statements.
func (controller *PlainController) OnValidationFail(ctx context.Context, err error) error {
log.Errorf("Failed to validate SQL statements, error: %v\n", err)
return err
}
// OnExecutorComplete is called when schemamanager finishes applying schema changes.
func (controller *PlainController) OnExecutorComplete(ctx context.Context, result *ExecuteResult) error {
out, _ := json.MarshalIndent(result, "", " ")
log.Infof("Executor finished, result: %s\n", string(out))
return nil
}
var _ Controller = (*PlainController)(nil)