-
Notifications
You must be signed in to change notification settings - Fork 0
/
engine.go
126 lines (115 loc) · 2.52 KB
/
engine.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
package rules_engine
import (
"fmt"
"github.com/galenliu/gateway/api/models/container"
"github.com/galenliu/gateway/pkg/rules_engine/effects"
"github.com/galenliu/gateway/pkg/rules_engine/triggers"
"sync"
)
type RuleDB interface {
CreateRule(rule Rule) (int64, error)
UpdateRule(ruleId int64, r Rule) error
DeleteRule(ruleId int64) error
GetRules() map[int64]RuleDescription
}
type Engine struct {
db RuleDB
rules sync.Map
container container.Container
}
func NewEngine(db RuleDB, container container.Container) *Engine {
e := &Engine{
db: db,
container: container,
}
return e
}
func (e *Engine) GetRules() map[int64]*Rule {
if len(e.getRules()) == 0 {
ruleMap := e.db.GetRules()
if len(ruleMap) > 0 {
for id, desc := range ruleMap {
tri := triggers.FromDescription(desc.Trigger, e.container)
eff := effects.FromDescription(desc.Effect, e.container)
if tri == nil || eff == nil {
continue
}
rule := NewRule(desc.Name, desc.Enabled, tri, eff)
rule.setId(id)
e.rules.Store(id, rule)
if r := e.getRule(id); r != nil {
go r.Start()
}
}
}
}
return e.getRules()
}
func (e *Engine) GetRule(id int64) *Rule {
return e.getRule(id)
}
func (e *Engine) AddRule(desc RuleDescription) (*Rule, error) {
rule := FromDescription(desc, e.container)
id, err := e.db.CreateRule(*rule)
if err != nil {
return nil, err
}
rule.setId(id)
e.rules.Store(id, rule)
rule.Start()
return rule, nil
}
func (e *Engine) getRules() map[int64]*Rule {
rules := make(map[int64]*Rule)
e.rules.Range(func(key, value any) bool {
id, ok := key.(int64)
v, ok1 := value.(*Rule)
if ok && ok1 {
rules[id] = v
}
return true
})
return rules
}
func (e *Engine) getRule(id int64) *Rule {
v, ok := e.rules.Load(id)
if ok {
r, ok1 := v.(*Rule)
if ok1 {
return r
}
}
return nil
}
func (e *Engine) DeleteRule(i int64) error {
r := e.getRule(i)
if r == nil {
return fmt.Errorf("rule %v does not exist", i)
}
r.Stop()
e.rules.Delete(i)
err := e.db.DeleteRule(i)
if err != nil {
fmt.Printf("delete rule %v failed: %v", i, err)
}
return nil
}
func (e *Engine) UpdateRule(i int64, desc RuleDescription) error {
r := e.getRule(i)
if r == nil {
return fmt.Errorf("rule %v does not exist", i)
}
rule := FromDescription(desc, e.container)
if rule == nil {
return fmt.Errorf("bad messages")
}
rule.setId(i)
err := e.db.UpdateRule(i, *r)
if err != nil {
fmt.Printf("delete rule %v failed: %v", i, err)
}
r.Stop()
e.rules.Store(i, rule)
rule.Start()
return nil
}