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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
'use strict';
const process = require('process'); // Allow env variable mocking
// [START functions_sql_mysql]
const mysql = require('mysql');
// [END functions_sql_mysql]
// [START functions_sql_postgres]
const pg = require('pg');
// [END functions_sql_postgres]
// [START functions_sql_mysql]
// [START functions_sql_postgres]
/**
* TODO(developer): specify SQL connection details
*/
const connectionName =
process.env.INSTANCE_CONNECTION_NAME || '<YOUR INSTANCE CONNECTION NAME>';
const dbUser = process.env.SQL_USER || '<YOUR DB USER>';
const dbPassword = process.env.SQL_PASSWORD || '<YOUR DB PASSWORD>';
const dbName = process.env.SQL_NAME || '<YOUR DB NAME>';
// [END functions_sql_postgres]
// [END functions_sql_mysql]
// [START functions_sql_mysql]
const mysqlConfig = {
connectionLimit: 1,
user: dbUser,
password: dbPassword,
database: dbName,
};
if (process.env.NODE_ENV === 'production') {
mysqlConfig.socketPath = `/cloudsql/${connectionName}`;
}
// Connection pools reuse connections between invocations,
// and handle dropped or expired connections automatically.
let mysqlPool;
exports.mysqlDemo = (req, res) => {
// Initialize the pool lazily, in case SQL access isn't needed for this
// GCF instance. Doing so minimizes the number of active SQL connections,
// which helps keep your GCF instances under SQL connection limits.
if (!mysqlPool) {
mysqlPool = mysql.createPool(mysqlConfig);
}
mysqlPool.query('SELECT NOW() AS now', (err, results) => {
if (err) {
console.error(err);
res.status(500).send(err);
} else {
res.send(JSON.stringify(results));
}
});
// Close any SQL resources that were declared inside this function.
// Keep any declared in global scope (e.g. mysqlPool) for later reuse.
};
// [END functions_sql_mysql]
// [START functions_sql_postgres]
const pgConfig = {
max: 1,
user: dbUser,
password: dbPassword,
database: dbName,
};
if (process.env.NODE_ENV === 'production') {
pgConfig.host = `/cloudsql/${connectionName}`;
}
// Connection pools reuse connections between invocations,
// and handle dropped or expired connections automatically.
let pgPool;
exports.postgresDemo = (req, res) => {
// Initialize the pool lazily, in case SQL access isn't needed for this
// GCF instance. Doing so minimizes the number of active SQL connections,
// which helps keep your GCF instances under SQL connection limits.
if (!pgPool) {
pgPool = new pg.Pool(pgConfig);
}
pgPool.query('SELECT NOW() as now', (err, results) => {
if (err) {
console.error(err);
res.status(500).send(err);
} else {
res.send(JSON.stringify(results));
}
});
// Close any SQL resources that were declared inside this function.
// Keep any declared in global scope (e.g. mysqlPool) for later reuse.
};
// [END functions_sql_postgres]