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Feat: use pg-promise notify for poller update

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csrapr 2021-05-25 17:40:22 +01:00 • committed by Sérgio Salgado
parent 4ce4a32502
commit 121ced632e
2 changed files with 14 additions and 2 deletions
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6
lib/new-settings-loader.js
View file

@ -1,6 +1,7 @@
const _ = require('lodash/fp')
const db = require('./db')
const migration = require('./config-migration')
const { asyncLocalStorage } = require('./async-storage')
const OLD_SETTINGS_LOADER_SCHEMA_VERSION = 1
const NEW_SETTINGS_LOADER_SCHEMA_VERSION = 2
@ -73,7 +74,10 @@ function saveConfig (config) {
return loadLatestConfigOrNone()
.then(currentConfig => {
const newConfig = _.assign(currentConfig, config)
return db.none(configSql, ['config', { config: newConfig }, true, NEW_SETTINGS_LOADER_SCHEMA_VERSION])
return db.tx(t => {
return t.none(configSql, ['config', { config: newConfig }, true, NEW_SETTINGS_LOADER_SCHEMA_VERSION])
.then(() => t.none('NOTIFY $1:name, $2', ['poller', asyncLocalStorage.getStore().get('schema')]))
}).catch(console.error)
})
}

10
lib/poller.js
View file

@ -15,6 +15,7 @@ const { asyncLocalStorage, defaultStore } = require('./async-storage')
const settingsLoader = require('./new-settings-loader')
const NodeCache = require('node-cache')
const util = require('util')
const db = require('./db')
const INCOMING_TX_INTERVAL = 30 * T.seconds
const LIVE_INCOMING_TX_INTERVAL = 5 * T.seconds
@ -74,11 +75,18 @@ cachedVariables.on('expired', (key, val) => {
}
})
db.connect({ direct: true }).then(sco => {
sco.client.on('notification', data => {
return reload(data.payload)
})
return sco.none('LISTEN $1:name', 'poller')
}).catch(console.error)
function reload (schema) {
const store = defaultStore()
store.set('schema', schema)
// set asyncLocalStorage so settingsLoader loads settings for the right schema
asyncLocalStorage.run(store, () => {
return asyncLocalStorage.run(store, () => {
return settingsLoader.loadLatest().then(settings => {
const pi = plugins(settings)
cachedVariables.set(schema, { settings, pi, isReloading: false })