https://nirajkashyap.github.io/tags/PostgreSQL/ Recent content in PostgreSQL on Niraj Kashyap Hugo en-us Wed, 22 Apr 2026 00:36:59 +0530 https://nirajkashyap.github.io/posts/Durable-Execution-FSM-based-Orchestration-Platform/ Fri, 06 Feb 2026 22:16:28 +0530 https://nirajkashyap.github.io/posts/Durable-Execution-FSM-based-Orchestration-Platform/ <h2 id="what-is-a-durable-workflow">What is a Durable Workflow?<a class="anchor" href="#what-is-a-durable-workflow">#</a></h2> <p>A <strong>durable workflow</strong> is a long‑running, stateful business process that automatically remembers where it left off, survives crashes or restarts, and can resume or retry instead of starting over.</p> <p>Unlike a simple script that runs once and dies, a durable workflow:</p> <ul> <li><strong>Persists its state</strong> (current step, variables, context) in a database or durable store</li> <li><strong>Handles timeouts, retries, and failures</strong> without losing progress</li> <li><strong>Supports human‑in‑the‑loop steps, approvals, and external events</strong> (e.g., a user clicking “confirm”)</li> </ul> <blockquote class='book-hint '> <p>In effect, durable workflows bring human‑like resilience to automation: they pause, recover, and continue, just like a person who remembers what they’ve already done.</p> https://nirajkashyap.github.io/posts/Finite-State-Machines-Backed-by-PostgreSQL-Intro/ Tue, 30 Dec 2025 10:37:22 +0530 https://nirajkashyap.github.io/posts/Finite-State-Machines-Backed-by-PostgreSQL-Intro/ <p>If you’re new to the concept of <strong>Finite State Machines (FSMs)</strong>, check out my previous blog post: <a href="https://nirajkashyap.github.io/posts/why-finite-state-machines-are-everywhere-from-software-to-human-life/">Why Finite State Machines Are Everywhere: From Software to Human Life</a>. That post explores how FSMs are fundamental to both software systems and real-world processes.</p> <hr> <h2 id="finite-state-machine-in-various-languages">Finite State Machine: In Various Languages<a class="anchor" href="#finite-state-machine-in-various-languages">#</a></h2> <p>FSMs as a concept have been implemented in many programming languages, each with its own data structures and libraries. For example:</p> <ul> <li><strong>TypeScript/JavaScript</strong>: <a href="https://xstate.js.org/">xstate</a> is a popular library for modeling FSMs and statecharts.</li> <li><strong>Python</strong>: Libraries like <a href="https://github.com/pytransitions/transitions">transitions</a> provide easy-to-use FSM implementations.</li> <li><strong>Java</strong>: Frameworks such as <a href="https://projects.spring.io/spring-statemachine/">Spring State Machine</a> offer robust FSM support.</li> <li><strong>C#</strong>: Libraries like <a href="https://github.com/dotnet-state-machine/stateless">Stateless</a> are widely used for FSMs.</li> <li><strong>Go</strong>: Libraries like <a href="https://github.com/looplab/fsm">looplab/fsm</a> provide simple and effective FSM implementations for Go.</li> </ul> <p>These libraries use different data structures—objects, classes, state tables, or even domain-specific languages—to represent states and transitions, but the core principles remain the same.</p>