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dbHelper.ts
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dbHelper.ts
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/* eslint-disable no-console */
import mongoose from 'mongoose';
import config from '../config/index';
let connectTimeOut: NodeJS.Timeout;
const DbHelper = {
connectTimes: 8,
connect(): mongoose.Mongoose {
DbHelper.mongooseConnect();
const db = mongoose.connection;
db.once('error', () => {
console.error('连接 mongodb 失败。');
connectTimeOut = setInterval(() => {
if (DbHelper.connectTimes > 0) {
console.log(`正在重连 mongodb,剩余次数 ${DbHelper.connectTimes}。`);
DbHelper.connectTimes -= 1;
DbHelper.mongooseConnect();
} else {
console.log('重连 mongodb 失败。');
clearTimeout(connectTimeOut);
}
}, 8000);
});
db.on('open', () => {
console.log('连接 mongodb 成功。');
clearTimeout(connectTimeOut);
});
// 单例模式
DbHelper.connect = () => {
return mongoose;
};
return mongoose;
},
mongooseConnect(): void {
mongoose.connect(config.databaseUrl, {
useNewUrlParser: true,
// 弃用警告 https://mongoosejs.com/docs/deprecations.html#-findandmodify-
useFindAndModify: false
});
}
};
export default DbHelper;