-
Notifications
You must be signed in to change notification settings - Fork 168
/
watcher.go
209 lines (184 loc) · 4.28 KB
/
watcher.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
/*
* Copyright (c) 2019-2022. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package registry
import (
"errors"
pb "github.com/pydio/cells/v4/common/proto/registry"
)
type watcher struct {
id string
wo Options
res chan Result
exit chan bool
}
func NewWatcher(id string, opts Options, res chan Result) Watcher {
exit := make(chan bool)
return &watcher{
id: id,
wo: opts,
res: res,
exit: exit,
}
}
func (m *watcher) actionMatches(event, filter pb.ActionType) bool {
// FULL_LIST : specific action only
if filter == pb.ActionType_FULL_LIST && event != pb.ActionType_FULL_LIST {
return false
}
// FULL_DIFF : skip diff and full_list
if filter == pb.ActionType_FULL_DIFF && event < pb.ActionType_CREATE {
return false
}
// Specific Action: checking action matches
if filter >= pb.ActionType_CREATE && event != filter {
return false
}
return true
}
func (m *watcher) Next() (Result, error) {
for {
select {
case r := <-m.res:
// If filter Actions are defined, skip if event does not match any
if !m.wo.ActionsMatch(r.Action()) {
continue
}
// Return everything
if len(m.wo.IDs) == 0 && len(m.wo.Names) == 0 && len(m.wo.Types) == 0 && len(m.wo.Filters) == 0 {
return r, nil
}
var items []Item
for _, item := range r.Items() {
foundID := false
for _, id := range m.wo.IDs {
if id == item.ID() {
foundID = true
break
}
}
if len(m.wo.IDs) > 0 && !foundID {
continue
}
foundName := false
for _, name := range m.wo.Names {
if name == item.Name() {
foundName = true
break
}
}
if len(m.wo.Names) > 0 && !foundName {
continue
}
foundType := false
L:
for _, itemType := range m.wo.Types {
switch itemType {
case pb.ItemType_NODE:
var node Node
if item.As(&node) {
foundType = true
break L
}
case pb.ItemType_SERVICE:
var service Service
if item.As(&service) {
foundType = true
break L
}
case pb.ItemType_SERVER:
var node Server
if item.As(&node) {
foundType = true
break L
}
case pb.ItemType_DAO:
var dao Dao
if item.As(&dao) {
foundType = true
break L
}
case pb.ItemType_EDGE:
var edge Edge
if item.As(&edge) {
foundType = true
break L
}
case pb.ItemType_GENERIC, pb.ItemType_ADDRESS, pb.ItemType_TAG, pb.ItemType_ENDPOINT:
var generic Generic
if item.As(&generic) &&
(itemType == pb.ItemType_GENERIC || itemType == generic.Type()) {
foundType = true
break L
}
}
}
if len(m.wo.Types) > 0 && !foundType {
continue
}
foundFilter := true
for _, filter := range m.wo.Filters {
if !filter(item) {
foundFilter = false
break
}
}
if !foundFilter {
continue
}
items = append(items, item)
}
if len(items) == 0 {
continue
}
return &result{
action: r.Action(),
items: items,
}, nil
case <-m.wo.Context.Done():
return nil, errors.New("context done")
case <-m.exit:
return nil, errors.New("watcher stopped")
}
}
}
func (m *watcher) Stop() {
select {
case <-m.exit:
return
default:
close(m.exit)
}
}
type result struct {
action pb.ActionType
items []Item
}
func NewResult(action pb.ActionType, items []Item) Result {
return &result{
action: action,
items: items,
}
}
func (r *result) Action() pb.ActionType {
return r.action
}
func (r *result) Items() []Item {
return r.items
}