Tamás Szincsák DonTomika

Setup DigitalOcean Droplets

Create 3 new Ubuntu 16.04 Droplets (smallest tier is enough to start with)

DNS: add the IP Address of these machines to your DNS config IP 1 = flynn.example.tld IP 2 = flynn.example.tld IP 3 = flynn.example.tld *.flynn.example.tld = CNAME to flynn.example.tld

To use the most modern version of Postgres software we need to add postgresql repository. Edit /etc/apt/sources.list or create /etc/apt/sources.list.d/pgdg.list and add there a line: deb http://apt.postgresql.org/pub/repos/apt/ jessie-pgdg main Then import the repository signing key, and update the package lists:

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get update

Install a new version of PostgreSQL server.

Once the Debian upgrade finished, I used dpkg-query -l postgresql* to check which versions of postgres I have installed.

	/*
	* MIT License
	*
	* Copyright (c) 2022 Albert Chang
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is

	import androidx.compose.foundation.BorderStroke

	/*
	* Copyright 2020 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0

	class CoroutineDebouncer<K, V> constructor(
	private val pendingBoard: ConcurrentMap<K, Deferred<V?>>
	) {
	/**
	* Debounce given a `task` based upon given `id`. This prevents jobs with same IDs run in parallel.
	* For subsequent callers get Deferred<V> of first (winning) coroutine.
	* Once Deferred<V> completes it is remove from the board.
	*
	* @param id for uniquely identifying a task
	* @param context under which given coroutine will be executed

	class MainViewModel : DisposableViewModel() {
	val title = ChannelLiveData("New Title 0")
	val isReady = ChannelLiveData(false)

	init {
	disposableLaunch {
	(1..Int.MAX_VALUE).forEach { time ->
	delay(1, TimeUnit.SECONDS)
	title.send("New Title $time")
	}

	After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
	The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

	Database files have to be updated before starting the server, here are the steps that had to be followed:

	# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
	brew unlink postgresql
	brew install [email protected]
	brew unlink [email protected]
	brew link postgresql

	# One liner
	wget --recursive --page-requisites --adjust-extension --span-hosts --convert-links --restrict-file-names=windows --domains yoursite.com --no-parent yoursite.com

	# Explained
	wget \
	--recursive \ # Download the whole site.
	--page-requisites \ # Get all assets/elements (CSS/JS/images).
	--adjust-extension \ # Save files with .html on the end.
	--span-hosts \ # Include necessary assets from offsite as well.
	--convert-links \ # Update links to still work in the static version.

	# Official framework image. Look for the different tagged releases at:
	# https://hub.docker.com/r/library/node/tags/
	image: node:6

	before_script:
	- npm install

	# This folder is cached between builds
	# http://docs.gitlab.com/ce/ci/yaml/README.html#cache
	cache:

	/*
	* Copyright (C) 2015 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software