Ondrej Zizka OndraZizka

I don't trust the vibe coding hype much for a very simple reason...

What is it? You describe an application you want. With natural language. The bigger the app, the longer description. (Throwing away iterative steps is nonsense, for the same reason why "the code documents itself" is nonsense: It represents what is, not what is supposed to be. Therefore, the complete description is needed to reproduce the app reliably.)

A description of an enterprise project like ours will be quite long - with all the requirements, legal quirks, legacy data, error handling, security...

So such description will need:

Maven super-short intro.

Note

Maven is declarative, not procedural. By default it is in XML, but you can write it in other languages.* We will use YAML.

Tip

Maven works on a principle of a “tree of trees” of build configuration overlaid over each other, which then create an effective tree - so called POM (project object model).

PROTON_USE_WINED3D=1 %command%

Anatomy of Spring Boot Start Up Timing

When a Spring Boot app starts up with default (INFO) logging, there are some noticeable gaps (pauses). It's worth focusing on the gaps when looking for efficiency savings because of the amount of time they take, and because no-one bothered to log anything, so the chances are the app is doing something repetitive. We can tweak the logging levels to try and fill in the gaps and find out what is going on in there.

Basic empty web app with actuators has three such gaps:

0                                                                        1410ms
|------|---------------------------|-----|------|---------|--------|--------|
       |           578             |     |144(5)|         | 133(6) |

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Loading...</title>
	<link id="favicon" rel="icon" href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII="> <style>
	body {
	font-family: sans-serif;
	padding: 20px;

	<pluginManagement>
	<plugins>
	<!-- Last updated 2025-04-24 from https://gist.github.com/OndraZizka/ff189184597770444db4ee27f144c01f.
	To get new: mvn versions:display-plugin-updates -Dmaven.version.ignore='(?i).(beta\|alpha\|RC\|CR).' -->
	<plugin><groupId>org.jetbrains.kotlin</groupId><artifactId>kotlin-maven-plugin</artifactId><version>${kotlin.version}</version></plugin>
	<plugin><groupId>org.jetbrains.dokka</groupId><artifactId>dokka-maven-plugin</artifactId><version>2.0.0</version></plugin>
	<plugin><groupId>io.fabric8</groupId><artifactId>docker-maven-plugin</artifactId><version>0.46.0</version></plugin>
	<plugin><groupId>io.quarkus.platform</groupId><artifactId>quarkus-maven-plugin</artifactId><version>${quarkus.platform.version}</version><extensions>true</extensions></plugin>
	<plugin><artifactId>maven-enforcer-plugin</artifactId><version>3.5.0</version></plugin>

	[flyway/flyway:latest] "flyway": Start container 980e2f7f4081
	: Usage
	: flyway [options] [command]
	: flyway help [command]
	:
	: By default, the configuration will be read from conf/flyway.conf.
	: Options passed from the command-line override the configuration.
	:
	: Commands
	: help Print this usage info and exit

	class StackBasedContext(
	val nestingStack: Deque<NestingLevel> = ArrayDeque(),
	val problems: MutableList<Pair<String, List<NestingLevel>>> = mutableListOf(),
	) {
	override fun toString() = nestingStack.ifEmpty { listOf("(root)") }.joinToString("/")

	fun addProblem(msg: String) { problems.add(msg to nestingStack.descendingIterator().asSequence().toList()) }

	fun pushLevel(dataParam: KParameter): PopOnClose { nestingStack.push(NestingLevel(dataParam)); return PopOnClose() }
	fun pushLevel(collectionIndex: Int): PopOnClose { nestingStack.push(NestingLevel(collectionIndex = collectionIndex)); return PopOnClose() }

	import java.io.FileNotFoundException
	import java.io.InputStream
	import java.nio.file.Path

	object ResourceUtils {

	fun getCallingClassName(): String? {
	var testUtilsSpotted = false;
	for (stackItem in Thread.currentThread().stackTrace) {
	if (stackItem.className == ResourceUtils::class.java.name) {

	#!/bin/bash

	## Run this in a directory to fetch all Git repos within it.

	find -name .git \| sed 's#.git##' \| sort \| xargs -t -n1 -I % git -C % fetch --all

	## CRON job: You can also put this into `crontab -e` in order to keep all repos up-to-date automatically:
	# # m h DoM mth DoW command
	# /5 * * * find /home/ondra/work -name .git \| sed 's#.git##' \| sort \| xargs -t -n1 -I % git -C % fetch --all --tags --force