-
Notifications
You must be signed in to change notification settings - Fork 13
/
ruleset_processor_impl.go
130 lines (104 loc) · 3.11 KB
/
ruleset_processor_impl.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
// Copyright 2023 Dimitrij Drus <dadrus@gmx.de>
//
// Licensed 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.
//
// SPDX-License-Identifier: Apache-2.0
package rules
import (
"errors"
"github.com/rs/zerolog"
"github.com/dadrus/heimdall/internal/heimdall"
"github.com/dadrus/heimdall/internal/rules/config"
"github.com/dadrus/heimdall/internal/rules/event"
"github.com/dadrus/heimdall/internal/rules/rule"
"github.com/dadrus/heimdall/internal/x/errorchain"
)
var ErrUnsupportedRuleSetVersion = errors.New("unsupported rule set version")
type ruleSetProcessor struct {
q event.RuleSetChangedEventQueue
f rule.Factory
l zerolog.Logger
}
func NewRuleSetProcessor(
queue event.RuleSetChangedEventQueue, factory rule.Factory, logger zerolog.Logger,
) rule.SetProcessor {
return &ruleSetProcessor{
q: queue,
f: factory,
l: logger,
}
}
func (p *ruleSetProcessor) isVersionSupported(version string) bool {
return version == config.CurrentRuleSetVersion
}
func (p *ruleSetProcessor) loadRules(ruleSet *config.RuleSet) ([]rule.Rule, error) {
rules := make([]rule.Rule, len(ruleSet.Rules))
for idx, rc := range ruleSet.Rules {
rul, err := p.f.CreateRule(ruleSet.Version, ruleSet.Source, rc)
if err != nil {
return nil, errorchain.NewWithMessage(heimdall.ErrInternal, "failed loading rule").CausedBy(err)
}
rules[idx] = rul
}
return rules, nil
}
func (p *ruleSetProcessor) OnCreated(ruleSet *config.RuleSet) error {
if !p.isVersionSupported(ruleSet.Version) {
return errorchain.NewWithMessage(ErrUnsupportedRuleSetVersion, ruleSet.Version)
}
rules, err := p.loadRules(ruleSet)
if err != nil {
return err
}
evt := event.RuleSetChanged{
Source: ruleSet.Source,
Name: ruleSet.Name,
Rules: rules,
ChangeType: event.Create,
}
p.sendEvent(evt)
return nil
}
func (p *ruleSetProcessor) OnUpdated(ruleSet *config.RuleSet) error {
if !p.isVersionSupported(ruleSet.Version) {
return errorchain.NewWithMessage(ErrUnsupportedRuleSetVersion, ruleSet.Version)
}
rules, err := p.loadRules(ruleSet)
if err != nil {
return err
}
evt := event.RuleSetChanged{
Source: ruleSet.Source,
Name: ruleSet.Name,
Rules: rules,
ChangeType: event.Update,
}
p.sendEvent(evt)
return nil
}
func (p *ruleSetProcessor) OnDeleted(ruleSet *config.RuleSet) error {
evt := event.RuleSetChanged{
Source: ruleSet.Source,
Name: ruleSet.Name,
ChangeType: event.Remove,
}
p.sendEvent(evt)
return nil
}
func (p *ruleSetProcessor) sendEvent(evt event.RuleSetChanged) {
p.l.Info().
Str("_src", evt.Source).
Str("_type", evt.ChangeType.String()).
Msg("Rule set changed")
p.q <- evt
}