44 lines
1.1 KiB
JavaScript
44 lines
1.1 KiB
JavaScript
const mariadb = require("mariadb");
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let dbConn;
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let conPool;
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// mariadb doc: https://github.com/MariaDB/mariadb-connector-nodejs/blob/master/documentation/promise-api.md
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async function reconnect() {
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try {
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dbConn = await conPool.getConnection();
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} catch (e) {
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if (e.code === "ECONNREFUSED") {
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let err = new Error("Lost connection to the database");
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err.code = "ERR_DB_CONN_LOST";
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throw err;
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} else {
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throw e;
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}
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}
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}
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module.exports = async config => {
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conPool = mariadb.createPool({
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...config.dbCredentials,
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connectionLimit: 10
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});
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dbConn = await conPool.getConnection();
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return {
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async query(q, p) {
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let res;
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try {
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res = await dbConn.query(q, p);
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} catch (e) {
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if (e.code === "ER_CMD_CONNECTION_CLOSED") {
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await reconnect();
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await this.query(q, p);
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} else {
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throw e;
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}
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}
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return res;
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}
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};
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};
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