| 1 | 'use strict';
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| 2 |
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| 3 | module.exports = class Connections {
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| 4 | constructor(app) {
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| 5 | this.app = app;
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| 6 | this.connectors = {};
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| 7 | this.connections = {};
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| 8 | }
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| 9 |
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| 10 | use({ type, connect } = {}) {
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| 11 | if (!type || typeof type !== 'string')
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| 12 | throw new Error('Invalid Kellner protocol type');
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| 13 | if (!connect || typeof connect !== 'function')
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| 14 | throw new Error('Invalid Kellner protocol');
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| 15 | this.connectors[type] = connect;
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| 16 | }
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| 17 |
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| 18 | get(type, name) {
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| 19 | const cacheKey = name ? `${type}:${name}` : type;
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| 20 | if (!this.connections[cacheKey])
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| 21 | this.connections[cacheKey] = this.connect(type, name);
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| 22 |
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| 23 | return this.connections[cacheKey];
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| 24 | }
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| 25 |
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| 26 | async connect(type, name) {
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| 27 | if (!this.connectors[type])
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| 28 | throw new Error(`No protocol of type [${type}] defined.`);
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| 29 |
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| 30 | const connection = await this.connectors[type](this.app.config, name);
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| 31 |
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| 32 | if (connection.on) {
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| 33 | connection.on('close', e => this.app.fail(e));
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| 34 | connection.on('error', e => this.app.fail(e));
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| 35 | connection.on('disconnect', e => this.app.fail(e));
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| 36 | }
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| 37 |
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| 38 | return connection;
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| 39 | }
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| 40 | };
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