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AWS quickstart guide

This guide assumes you are setting up AWS for the first time either for personal use of for a small business (couple of users). The steps will also scale to a large organisation but it's likely that you will want to think through a more complex structure for grouping users into accounts and the permissions they have.

Part 1: Be careful not to spend too much (Optional / Recommended Step)

From the top-right drop-down, select Billing and Cost Management, then Budgets, then Create budget. Here you can define a budget or use a premade template. When starting out you may want to try sticking to the Zero spend budget for example.

Part 2: Let's begin by creating an organisation with a few accounts

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Developing mods and maps for Doom 3 (dhewm3)

Getting Doom 3

It's worth getting Doom 3 from the Steam store as it includes:

• The original DOOM 3
• Resurrection of Evil Expansion
• DOOM 3: BFG Edition

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These instructions cover the following topics

• Generating/updating GPG keys
• Publishing GPG keys
• Adding GPG keys to GitHub
• Using GPG keys to sign git commits
• Using GPG keys to sign maven artifacts
• Publishing maven artifacts to OSSRH (Open Source Software Repository Hosting)

It's recommended to also read the following documentation

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import org.mockito.ArgumentMatcher;

// javax.json:javax.json-api
//import javax.json.Json;
//import javax.json.JsonStructure;
//import javax.json.stream.JsonGenerator;

// jakarta.json:jakarta.json-api
import jakarta.json.Json;
import jakarta.json.JsonStructure;

SingingBush

CloudWatch is really powerful. As well as just searching your logs you can quickly aggregate and visualise data from your logs.

Visualising warnings and errors in a line chart

In this example we use a regex make a capture group for loglevel based on lines such as 2022-10-26T16:00:00.000Z ERROR something bad happened! then count how many times the logs contained a WARN or ERROR in the log file in a 30 minute interval. This query can be used in conjunction with the Visualization tab in CloudWatch (select Line from the dropdown).

With a little editing based on your use case, this query wiil help build an overview of your error rate

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# Amazon Linux with Amazon Corretto and the aws-cli tools for use in the UK (Amazon Linux uses yum)
FROM amazon/aws-cli:latest

# Set the default region for aws-cli
RUN mkdir /root/.aws && echo -e "[default]\nregion = eu-west-1" >> /root/.aws/config

# Set the locale to UK
ENV LANG en_GB.UTF-8
ENV LANGUAGE en_GB:en
ENV LC_ALL en_GB.UTF-8

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$baseUrl = 'http://api.domain.com/some-service/'

Get-ChildItem -Path ".\*.jpg" | Sort-Object Name | % {
    $response = try {
        Invoke-RestMethod -uri "$baseUrl/image" -Method Post -Infile $_.Name -ContentType 'image/jpeg' -ErrorAction Stop
    } catch [System.Net.WebException] {
        Write-Error "Media Service returned $($_.Exception.Response.StatusCode.Value__) : $($_.Exception.Message)"
        Exit 1;
    }

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// https://dlang.org/changelog/2.101.0.html#logger
static if(__traits(compiles, (){ import std.logger; } )) {
    import std.logger;
} else {
    // logger was in 'std.experimental' for a long time but you could optionally check that too
    import std.experimental.logger;
}

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Bluetooth (or the lack of) on Java

Java SE has never had support for bluetooth, the closest thing to a standard is JABWT (Java APIs for Bluetooth Wireless Technology) defined in JSR-82 which is actually for Java ME (Micro Edition).

JSR-82 provides the specification for the javax.bluetooth and javax.obex packages and would allow for code somewhat like:

import javax.bluetooth.BluetoothStateException;
import javax.bluetooth.DeviceClass;

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Today I did a quick google search to see if any emulators had been written in Java. As it urns out there was a Sega Megadrive emulator called [jEnesis](http://www.workingdesign.de/projects/jenesis.php) that was written by Stephan Dittrich and released back in 2006.

Most of the site is just dead links now and I wasn't able to find a working download there but I was able to track down a build of the project else where. Unfortunately however, the build I found was version 0.0.5 from May 2006 so it doesn't include the changes that went into the final v0.1.0 that was supposed to have been built in June 2006 (perhaps it was never made public).

The jEnesis.jar that I downloaded depends on a very old [lwjgl](https://www.lwjgl.org/). The timestamp for the file was December 2005 which would make it [version 0.99](https://sourceforge.net/projects/java-game-lib/files/Official%20Releases/LWJGL%200.99/). 

This old lwjgl only supported 32-bit systems, so running `java -cp jEnesis.jar;lwjgl.jar jenesis.Main` would throw a