About Me

Hi,

My Stackoverflow.com Profile (Multi-Tenancy), Overall Profile

I have been ranked as #5 for answering the multi-tenancy questions in stackoverflow.com (all time), which I am proud of for giving back some of my learning to the community

I am Saravanan Doraiswamy. I live in Tamilnadu state in India.

I did my Post Graduation in Computer Science in 2010 and have been into software development since then.

I started my carreer in PHP programming, mainly in wordpress etc for a web site building company and then later moved to an MNC where I got the opportunity to learn a lot building a Multi-Tenant SaaS Application development framework for building SaaS Applications.

There we used the latest of .Net frameworks, Angular and Enterprise library (sunset by now), ADO.Net, we established all the best practices, got recognition from Microsoft on the application. I did learn about F# and built few small functions as modules using F#. We used .Net (C#), SQL Server, Azure, Javascript, jQuery, Angular etc.

Later, I moved to the current organization where I was involved into .Net Projects for large Enterprise organizations and used Azure.

Currently, I am working in the Java programming language with Spring boot, MySQL, React.JS and AWS with Terraforms and Shell, batch scripts.

I also work with simple python scripts and groovy scripts that are used in Jenkins. We have extensively used Jenkins as a execution engine for the business requirements and have used the REST Api of Jenkins within Java.

I am interested in solving problems, optimization, refactoring and building up design for problem statements.

To contact me, please do drop me an email to gmail in case of any questions or help required.

Comments

User Authentication schemes in a Multi-Tenant SaaS Application

User Authentication in Multi-Tenant SaaS Apps Introduction We will cover few scenarios that we can follow to perform the user authentication in a Multi-Tenant SaaS application. Scenario 1 - Global Users Authentication with Tenancy and Tenant forwarding In this scheme, we have the SaaS Provider Authentication gateway that takes care of Authentication of the users by performing the following steps Tenant Identification User Authentication User Authorization Forwarding the user to the tenant application / tenant pages in the SaaS App This demands that the SaaS provider authentication gateway be a scalable microservice that can take care of the load across all tenants. The database partitioning (horizontal or other means) is left upto the SaaS provider Service. Scenario 2 - Global Tenant Identification and User Authentication forwarding In the above scenario, the tenant identification happens on part of the SaaS provider Tenant Identification gateway. Post which, ...

Handling exceptions in the Executor service threads in Java

Introduction This is a continuation post on the exception handling strategies in the threads in Java. For Introduction, please read this post The second post is available here This post addresses the problem statement "How to use the exception handlers in the threads spawned by the Executor Service in Java?" Not all times, we will be using Thread classes to run our threads because we have to manage a lot of the underlying logic for managing threads. There is ExecutorService in Java which comes to the rescue for the above problem. In the previous posts, we have discussed on how to handle the exceptions in plain threads. However, when using executor service, we do not create / manage threads, so how do we handle exception in this case. We have a ThreadFactory as an argument which can be used to customize the way threads are created for use within the ExecutorService . The below snippet of code leverages this feature to illustrate the exception handling, wherein we creat...

Upgrade from http1.1 to http2 for Java spring boot applications hosted in tomcat

In this post, we will list down the tasks to be done for enabling the HTTP 2.0 support in spring boot applications which are hosted in Apache tomcat webserver Application Level Changes Spring boot Application Configuration Changes server.http2.enabled=true In the spring boot application's application.properties file, we have to add the above line so that Spring boot can add the support for http2 Tomcat server configuration In the tomcat web server, we should have SSL enabled before doing the below change. To start with, we have to shutdown the tomcat server instance that is running CD to the directory that has tomcat installed and cd to the bin directory and run the below command sh shutdown.sh We have add the UpgradeProtocol which adds the respective Http2Protocol handler classname to the connector pipeline that enables support for http2.0 <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" /> The above UpgradeProtocol can be added to the connec...

SFTP and File Upload in SFTP using C# and Tamir. SShSharp

The right choice of SFTP Server for Windows OS Follow the following steps, 1. Download the server version from here . The application is here 2. Provide the Username, password and root path, i.e. the ftp destination. 3. The screen shot is given below for reference. 4. Now download the CoreFTP client from this link 5. The client settings will be as in this screen shot: 6. Now the code to upload files via SFTP will be as follows. //ip of the local machine and the username and password along with the file to be uploaded via SFTP. FileUploadUsingSftp("172.24.120.87", "ftpserveruser", "123456", @"D:\", @"Web.config"); private static void FileUploadUsingSftp(string FtpAddress, string FtpUserName, string FtpPassword, string FilePath, string FileName) { Sftp sftp = null; try { // Create instance for Sftp to upload given files using given credentials sf...

Download CSV file using JavaScript fetch API

Downloading a CSV File from an API Using JavaScript Fetch API: A Step-by-Step Guide Introduction: Downloading files from an API is a common task in web development. This article walks you through the process of downloading a CSV file from an API using the Fetch API in JavaScript. We'll cover the basics of making API requests and handling file downloads, complete with a sample code snippet. Prerequisites: Ensure you have a basic understanding of JavaScript and web APIs. No additional libraries are required for this tutorial. Step 1: Creating the HTML Structure: Start by creating a simple HTML structure that includes a button to initiate the file download. <!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < title > CSV File Download </ title > </ head > < body > ...

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