Wesley Egberto wesleyegberto

I've been working with Apache Kafka for over 7 years. I inevitably find myself doing the same set of activities while I'm developing or working with someone else's system. Here's a set of Kafka productivity hacks for doing a few things way faster than you're probably doing them now. 🔥

Show me all my Kafka topics and their partitions, replicas, and consumers
Show me the contents of a topic
Create a Kafka topic
Produce messages to a Kafka topic
Validate the schema of messages before producing to a topic
Do all of this at a distance

Get the tools

This is a copy, original file can be seen here

API Design Cheat Sheet

Build the API with consumers in mind--as a product in its own right.
- Not for a specific UI.
- Embrace flexibility / tunability of each endpoint (see #5, 6 & 7).

Eat your own dogfood, even if you have to mockup an example UI.

Dependencies to Java Testing with:

JUnit 5
API tests
Architecture tests
TestContainer for IT
Jacoco for coverage report
Pitest for mutation test

To run:

	FROM maven:3.9-eclipse-temurin-17-alpine AS builder
	WORKDIR /app

	COPY pom.xml .
	RUN mvn verify --fail-never

	COPY src ./src
	RUN mvn package

	FROM ibm-semeru-runtimes:open-17-jre-centos7

	run: build
	java -cp .:dist Main

	build: src/Main.java
	javac -d dist src/Main.java

	clean:
	rm -rf dist
	mkdir dist

	# This was created to export any JSON format to CSV.
	# I've created to help extract MongoDb collection to one or more CSV, [hopefully] in a normalized tables.

	import pandas as pd

	class JsonToDataFrameCsvExporter(object):
	""" Simple exporter to help transform a JSON into a DataFrame CSV file.

	The main purpose of this exporter is to export a JSON as a collection of normalized
	table in CSV file.

	import java.lang.reflect.Field;
	import sun.misc.Unsafe;

	public class TestThreadStackSize {
	private static void crashVM() {
	try {
	makeSegfault(getUnsafe());
	} catch (Exception e) {
	// swallow
	}

	class Event<T> {
	T payload;
	}

	public <T> T parseJsonToClass(String json, Class<T> targetClass) throw JsonProcessingException {
	var targetType = objectMapper
	.getTypeFactory()
	.constructParametricType(Event.class, targetClass);

	return objectMapper.readValue(json, targetType);

	/* *******************************************************************************************
	* TAILWIND.CSS
	* DOCUMENTATION: https://tailwindcss.com/
	*
	* Original file can be seen here: https://github.com/LeCoupa/awesome-cheatsheets/blob/master/frontend/tailwind.css
	* ******************************************************************************************* */

	/*
	* Available breakpoints
	* --------------------

	/* *******************************************************************************************
	* ANGULAR (2+) CHEATSHEET
	* BASED ON https://angular.io/guide/cheatsheet
	* DOCUMENTATION: https://angular.io/docs
	* STYLE GUIDE: https://angular.io/guide/styleguide
	* ******************************************************************************************* */

	Original file can be seen [here](https://github.com/LeCoupa/awesome-cheatsheets/blob/master/frontend/angular.js)

	```