azure-functions-azuredb-executer/index.js

Small project to avoid boiler plate when creating Azure Functions that execute jobs in Azure Sql Databases

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var Connection = require("tedious").Connection;
var Request = require("tedious").Request;
/**
 * Execute the given sql under context sent by azure with the azure database connection
 * @param context Azure context send by azure functions
 * @param connection Azure database connection parameters
 * @param sql Sql to be executed
 */
function executeSql(context, connection, sql, callback) {
    const request = new Request(sql, function (err, rowCount) {
        if (err) {
            context.log(err);
            context.res = {
                status: 500,
                body: "Failed to connect to execute statement."
            };
            context.done();
        }
        else {
            context.log(rowCount + " rows");
            context.done();
            if (callback) {
                callback();
            }
        }
    });
    request.on("row", function (columns) {
        columns.forEach(function (column) {
            context.log(column.value);
        });
    });
    execute(context, connection, request);
}
exports.executeSql = executeSql;
/**
 * Execute the given Tedious Request under context sent by azure with the azure database connection
 * @param context Azure context send by azure functions
 * @param connection  Azure database connection parameters
 * @param request Tedious Request to Be executed. Do not forget to call a context.done() after execution
 */
function execute(context, connection, request) {
    context.log("Starting JavaScript DB Executer");
    getConnection(context, connection, (conn) => {
        conn.execSql(request);
    });
}
exports.execute = execute;
function getConnection(context, connection, exec) {
    var config = {
        userName: connection.db_user,
        password: connection.db_password,
        server: connection.db_address,
        options: {
            database: connection.db_name,
            encrypt: true,
            requestTimeout: connection.db_request_timeout || 15000,
        }
    };
    var conn = new Connection(config);
    conn.on("connect", function (err) {
        if (err) {
            context.log(err);
            context.res = {
                status: 500,
                body: "Unable to establish a connection."
            };
            context.done();
        }
        else {
            exec(conn);
        }
    });
}
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