Mix-and-Match Database Tutorial Introduction | Kurrent Docs
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Mix-and-Match Database Tutorial Introduction

Introduction

This tutorial will guide you through the Mix-and-Match Database sample with KurrentDB using GitHub Codespaces.

Objectives

In this tutorial, you will:

  • Learn how to project events from KurrentDB into read models in different databases
  • Experience how to update read models catch-up subscription and checkpoints
  • Understand how to update read models in real time

Prerequisites

Before starting, ensure you have the following:

  • A GitHub account to use GitHub Codespaces
  • Basic knowledge of one of the development languages/platforms below
  • Familiarity with command-line operations

Tutorial Overview

This tutorial consists of the following steps:

Part 1: Setup and Initialize KurrentDB

  1. Set up your Codespaces: Starts up an interactive coding environment in your browser where all tools and database are installed
  2. Start and Initialize KurrentDB with Sample Events: Start up KurrentDB and initialize it with sample events
  3. Browse the Sample Events in KurrentDB's Admin UI: Access the Admin UI to browse the appended events

Part 2: Project KurrentDB Events to Postgres

  1. Execute Projection Applications: Starts up the projection sample applications that transform KurrentDB events into read models in Postgres and Redis
  2. Review the Projected Read Models in Postgres: Run the PostgreSQL command line tool to review the newly inserted records
  3. Examine the Postgres Projection Application Codebase: Examine the PostgreSQL projection application codebase to see how events are transformed to read models in the tables

Part 3: Project KurrentDB Events to Redis

  1. Review the Projected Read Models in Redis: Run the Redis command line tool to review the newly added entries
  2. Examine the Redis Projection Application Codebase: Examine the Redis projection application codebase to see how events are transformed into read models in Redis

Part 4: Project KurrentDB Events in Real-Time

  1. Browse the Demo Web Page: Navigate to the Demo Web Page to see a sample of how the read models in Postgres and Redis are used
  2. Start the Live Data Generator: Start a live data generator program that continuously appends events into KurrentDB
  3. Watch the Read Models Update in Real-Time: See how the read models are updated in real-time in the Demo Web Page
  4. Understanding catch-up subscription and real-time processing: Understand how the code projects events to the read models in real-time
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