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index.js
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index.js
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const cmdArgs = process.argv.slice(2);
const mongoURI = cmdArgs.shift();
const exit = () => {
console.log("Finished application");
process.exit(0);
};
if (!mongoURI) {
console.log("Mongo URI is required!");
process.exit(1);
}
if (cmdArgs.includes("use-zone-js")) {
require("zone.js/dist/zone-node");
}
if (cmdArgs.includes("use-mongoose")) {
const mongoose = require("mongoose");
mongoose.connect(mongoURI, {
useNewUrlParser: true
});
mongoose.connection.once("open", () => {
console.log("Connection open!");
console.log("Closing the client...");
mongoose.disconnect();
exit();
});
mongoose.connection.on("error", err => {
console.log("Unable to connect to the database");
console.log(err.stack);
exit();
});
} else {
const MongoClient = require("mongodb").MongoClient;
// Use connect method to connect to the server
MongoClient.connect(
mongoURI,
{
useNewUrlParser: true
},
(err, client) => {
if (err) {
console.log("Unable to connect to the database");
console.log(err.stack);
exit();
}
console.log("Connection open!");
console.log("Closing the client...");
client.close();
exit();
}
);
}