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
| 'use strict';
|
| // shared state names
| const STATE_CLOSING = 'closing';
| const STATE_CLOSED = 'closed';
| const STATE_CONNECTING = 'connecting';
| const STATE_CONNECTED = 'connected';
|
| // An enumeration of topology types we know about
| const TopologyType = {
| Single: 'Single',
| ReplicaSetNoPrimary: 'ReplicaSetNoPrimary',
| ReplicaSetWithPrimary: 'ReplicaSetWithPrimary',
| Sharded: 'Sharded',
| Unknown: 'Unknown'
| };
|
| // An enumeration of server types we know about
| const ServerType = {
| Standalone: 'Standalone',
| Mongos: 'Mongos',
| PossiblePrimary: 'PossiblePrimary',
| RSPrimary: 'RSPrimary',
| RSSecondary: 'RSSecondary',
| RSArbiter: 'RSArbiter',
| RSOther: 'RSOther',
| RSGhost: 'RSGhost',
| Unknown: 'Unknown'
| };
|
| // helper to get a server's type that works for both legacy and unified topologies
| function serverType(server) {
| let description = server.s.description || server.s.serverDescription;
| if (description.topologyType === TopologyType.Single) return description.servers[0].type;
| return description.type;
| }
|
| const TOPOLOGY_DEFAULTS = {
| useUnifiedTopology: true,
| localThresholdMS: 15,
| serverSelectionTimeoutMS: 30000,
| heartbeatFrequencyMS: 10000,
| minHeartbeatFrequencyMS: 500
| };
|
| function drainTimerQueue(queue) {
| queue.forEach(clearTimeout);
| queue.clear();
| }
|
| function clearAndRemoveTimerFrom(timer, timers) {
| clearTimeout(timer);
| return timers.delete(timer);
| }
|
| module.exports = {
| STATE_CLOSING,
| STATE_CLOSED,
| STATE_CONNECTING,
| STATE_CONNECTED,
| TOPOLOGY_DEFAULTS,
| TopologyType,
| ServerType,
| serverType,
| drainTimerQueue,
| clearAndRemoveTimerFrom
| };
|
|
