dhsrocha / Broker.java

Last active April 3, 2025 09:42

Thread-safe publish-subscribe mechanism to It allows subscribers to register themselves for event notifications without preventing garbage collection.

	import java.lang.ref.Reference;
	import java.lang.ref.ReferenceQueue;
	import java.lang.ref.WeakReference;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.List;
	import java.util.Objects;
	import java.util.concurrent.CompletableFuture;
	import java.util.concurrent.CopyOnWriteArrayList;
	import java.util.concurrent.CopyOnWriteArraySet;

dhsrocha / FSM.java

Last active April 2, 2025 08:26

A generic finite state machine implementation for managing stateful transitions.

	import java.util.EnumMap;
	import java.util.Map;
	import java.util.Objects;
	import java.util.function.UnaryOperator;

	/**
	* A generic finite state machine implementation for managing state transitions.
	*
	* @param <S> the type of the state, which must be an enum.
	* @param <D> the type of the data associated with the states.

dhsrocha / PortUtil.java

Last active April 14, 2021 23:20

Find next available TCP port.

	import java.net.ServerSocket;

	class PortUtil {

	private PortUtil() {}

	/**
	* Recursively loops until finding a available TCP port, locks it, get
	* its value and then releases it.
	*

dhsrocha / Exec.java

Created February 27, 2021 03:39

Practical sample (Java 8+) for `Runtime.exec` and output returning.

	package template;

	import java.io.BufferedReader;
	import java.io.InputStreamReader;
	import java.nio.charset.StandardCharsets;
	import java.util.concurrent.TimeUnit;
	import java.util.stream.Collectors;
	import lombok.NonNull;
	import lombok.SneakyThrows;
	import lombok.experimental.UtilityClass;

dhsrocha / setup.sh

Last active April 4, 2020 04:27

Python environment setup with pyenv and pipenv. Also contains self-check logic and middleware setup powered by Shellcheck and Docker respectively.

	#!/usr/bin/env sh
	set -e

	# @see https://gist.github.com/dhsrocha/ee88f54c2e913c59412817e210bd206b/edit

	# ::: Global variables
	readonly RC="$HOME/.bashrc"
	readonly PROJ_NAME="${PWD##*/}"

	readonly PROJ_VER="3.8.2"

dhsrocha / db+client.sh

Created August 20, 2019 19:46

	#!/usr/bin/env sh
	set -e; set -f

	# http://www.bashoneliners.com/oneliners/243/
	CWD=$(cd "$(dirname "$0")" && pwd)

	# Run database's docker stack
	run_db() { (

	sudo docker-compose \

arthurportas / simplelogger.properties

Created February 23, 2019 19:20

	# SLF4J's SimpleLogger configuration file
	# Simple implementation of Logger that sends all enabled log messages, for all defined loggers, to System.err.

	# Default logging detail level for all instances of SimpleLogger.
	# Must be one of ("trace", "debug", "info", "warn", or "error").
	# If not specified, defaults to "info".
	#org.slf4j.simpleLogger.defaultLogLevel=info

	# Logging detail level for a SimpleLogger instance named "xxxxx".
	# Must be one of ("trace", "debug", "info", "warn", or "error").

gene1wood / install-depot-multisystem.sh

Last active April 15, 2020 22:36

Create MultiBoot USB

	#! /bin/bash
	exec >& >(tee -a /tmp/debug-install-depot-multisystem.txt)

	# │▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒│
	# │ install-depot-multisystem.sh │
	# │ written by François Fabre │
	# │ MultiSystem LiveUSB │
	# │▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒│

	# Mr Fabre François @frafa

branneman / better-nodejs-require-paths.md

Last active May 15, 2025 11:17

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

Diego Rocha dhsrocha

Better local require() paths for Node.js

Problem

Possible solutions