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73 lines
2.3 KiB
73 lines
2.3 KiB
import {Container, Inject, Singleton} from '../../di'
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import {DatabaseService} from '../DatabaseService'
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import {PostgresConnection} from '../connection/PostgresConnection'
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import {ErrorWithContext} from '../../util'
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import {Unit} from '../../lifecycle/Unit'
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import {Config} from '../../service/Config'
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import {Logging} from '../../service/Logging'
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import {MigratorFactory} from '../migrations/MigratorFactory'
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/**
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* Application unit responsible for loading and creating database connections from config.
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*/
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@Singleton()
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export class Database extends Unit {
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@Inject()
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protected readonly config!: Config
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@Inject()
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protected readonly dbService!: DatabaseService
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@Inject()
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protected readonly logging!: Logging
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@Inject('injector')
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protected readonly injector!: Container
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/**
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* Load the `database.connections` config and register Connection instances for each config.
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* Automatically initializes the connections.
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*/
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public async up(): Promise<void> {
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const connections = this.config.get('database.connections')
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const promises = []
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// Register the migrator factory
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this.injector.registerFactory(this.injector.make(MigratorFactory))
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for ( const key in connections ) {
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if ( !Object.prototype.hasOwnProperty.call(connections, key) ) {
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continue
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}
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const config = connections[key]
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this.logging.info(`Initializing database connection: ${key}`)
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this.logging.verbose(config)
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let conn
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if ( config?.dialect === 'postgres' ) {
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conn = <PostgresConnection> this.app().make(PostgresConnection, key, config)
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} else {
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const e = new ErrorWithContext(`Invalid or missing database dialect: ${config.dialect}. Should be one of: postgres`)
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e.context = { connectionName: key }
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throw e
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}
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this.dbService.register(key, conn)
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promises.push(conn.init())
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}
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await Promise.all(promises)
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this.logging.info('Database connections opened.')
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}
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/**
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* Close the configured connections cleanly before exit.
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*/
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public async down(): Promise<void> {
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await Promise.all(this.dbService.names()
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.map(name => this.dbService.get(name).close()))
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}
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}
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