Refine slides with naming, code simplification, and further trimming

Torey Heinz committed Feb 23, 2026

commit 73a555636aae6c5fb782fcb33e19dad509819c01

Showing 3 changed files with 16 additions and 56 deletions

scratch.md +3 -0

@@	@@ -194,3 +194,6 @@ Review each of these files for typos and consistency. Are we building a case for
	- slides/01-intro.html
	- 02-the-language.livemd
	- slides/03-real-world.html
+
+
+	Let's add this screen shout after "The Core Function" it shows our EPP health page for OrbitFour

slides/01-intro.html +1 -2

@@	@@ -138,12 +138,11 @@
	<p class="fragment small muted">The BEAM VM was designed from scratch for this:</p>
	<ul>
	<li class="fragment"><strong>Lightweight processes</strong> — ~2KB each, millions at once</li>
-	<li class="fragment"><strong>Preemptive scheduling</strong> — no request can starve others</li>
	<li class="fragment"><strong>Per-process GC</strong> — no stop-the-world pauses</li>
	<li class="fragment"><strong>Crash isolation</strong> — one process can't take down the app</li>
	</ul>
	<p class="fragment muted" style="margin-top: 0.8em; font-style: italic;">
-	Battle-tested for 40 years. Nine nines of uptime.<br/>
+	Battle-tested for 40 years. 99.999999% uptime.<br/>
	It just wasn't fun to work with...
	</p>

slides/03-real-world.html +12 -54

@@	@@ -30,11 +30,11 @@

	<section>
	<h2>Three Production Systems</h2>
-	<p class="muted">Going beyond basic CRUD apps</p>
+	<p class="muted">Going beyond basic Web apps</p>
	<ol>
-	<li class="fragment"><strong>Email Marketing</strong> — 500k+ personalized emails</li>
-	<li class="fragment"><strong>Domain Registry</strong> — TCP connections to Verisign</li>
-	<li class="fragment"><strong>Internal Admin</strong> — Multi-site LiveView dashboard</li>
+	<li class="fragment"><strong>Vianet Marketing</strong> — Email marketing platform</li>
+	<li class="fragment"><strong>OrbitFour</strong> — full featured domain registration platform</li>
+	<li class="fragment"><strong>Vianet Admin</strong> — Multi-site LiveView dashboard</li>
	</ol>

	<aside class="notes">
@@	@@ -43,22 +43,22 @@
	</section>

	<!-- =============================================
-	SECTION 3.1: Email Marketing
+	SECTION 3.1: Vianet Marketing
	============================================= -->

	<section class="section-divider" data-transition="zoom">
-	<h2>Email Marketing</h2>
-	<p>500,000+ personalized emails through AWS SES</p>
+	<h2>Vianet Marketing</h2>
+	<p>Sending emails through AWS Simple Email Service (SES)</p>

	<aside class="notes">
-	First system: our email marketing platform. This sends half a million personalized emails through AWS SES. The challenge isn't just volume — it's doing it reliably without exceeding rate limits.
+	First system: our Vianet marketing platform. This sends half a million personalized emails through AWS SES. The challenge isn't just volume — it's doing it reliably without exceeding rate limits.
	</aside>
	</section>

	<section data-transition="fade">
	<img src="images/vianet-marketing.jpg" alt="Vianet Marketing email campaign dashboard" style="max-height: 85vh; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.3);">
	<aside class="notes">
-	This is our email marketing platform. On the left you can see the campaign details — audience, member count, schedule. On the right, the actual email preview. Over half a million members, and each one gets a personalized email.
+	This is our Vianet marketing platform. On the left you can see the campaign details — audience, member count, schedule. On the right, the actual email preview. Over half a million members, and each one gets a personalized email.
	</aside>
	</section>

@@	@@ -101,11 +101,11 @@

	<pre><code class="language-elixir" data-trim>
	def perform(%Oban.Job{args: args}) do
-	campaign = Campaigns.get_campaign!(args["campaign_id"])
+	member_ids = Campaigns.member_ids!(args["campaign_id"])

	# Stream from DB → chunk → bulk insert jobs
	Repo.transaction(fn ->
-	Repo.stream(member_ids_query(campaign), max_rows: 2_000)
+	Repo.stream(member_ids(campaign), max_rows: 2_000)
	\|> Stream.chunk_every(2_000)
	\|> Enum.each(fn member_ids ->
	member_ids
@@	@@ -134,13 +134,11 @@ def perform(%Oban.Job{args: args} = job) do
	{:ok, member} <- get_member_with_site(member_id),
	{:ok, _} <- validate_email(member.email),
	{:ok, campaign} <- get_campaign_with_site(campaign_id),
-	{:ok, campaign_email} <- reserve_campaign_email(campaign, member),
	{:ok, _} <- EmailRateLimiter.ready?()
	) do
	send_campaign_email(campaign, member)
	else
	{:not_ready, :exceeded_rate} -> {:snooze, 1}
-	{:not_ready, :exceeded_daily} -> {:snooze, min(backoff(job), 3_600)}
	{:already_sent} -> {:discard, :already_sent}
	{:invalid_email} -> {:discard, :invalid_email}
	{:error, result} -> {:error, result}
@@	@@ -167,8 +165,6 @@ defmodule Marketing.EmailRateLimiter do
	def ready?, do: GenServer.call(__MODULE__, :acquire)

	def handle_call(:acquire, _from, state) do
-	state = refill(state)
-
	if state.tokens >= 1.0 do
	{:reply, {:ok, :token}, %{state \| tokens: state.tokens - 1.0}}
	else
@@	@@ -330,44 +326,6 @@ end
	</aside>
	</section>

-	<section>
-	<h2>LiveView: Assign Async</h2>
-	<p class="muted small">Load from three databases concurrently — loading states are automatic</p>
-
-	<pre class="tiny-code"><code class="language-elixir" data-trim data-line-numbers="1-13\|15-23">
-	# In mount — load data asynchronously from three databases
-	socket
-	\|> assign_async(
-	[:puppies_admins, :roommates_admins, :rr_admins],
-	fn ->
-	{:ok, %{
-	puppies_admins: Puppies.Admins.get_active_admins(),
-	roommates_admins: Roommates.Admins.get_admins(),
-	rr_admins: ReputableRooms.Admins.get_admins()
-	}}
-	end
-	)
-
-	# In template — spinner while loading, then render
-	<.async_result :let={admins} assign={@puppies_admins}>
-	<:loading><.spinner /></:loading>
-	<.input
-	type="select"
-	label="Puppies admin"
-	options={Enum.map(admins, &{&1.name, &1.id})}
-	/>
-	</.async_result>
-	</code></pre>
-
-	<p class="fragment" style="font-size: 0.7em; color: #555;">
-	<strong>No loading state management. No useEffect. No fetch.</strong>
-	</p>
-
-	<aside class="notes">
-	Here's assign_async in action. The mount function loads admin lists from three different databases concurrently. Loading states are automatic — the template gets spinners for free. When data arrives, the async_result component renders the content. Compare this to React: you'd need useState, useEffect, a loading boolean, error handling — all wired up manually. Here LiveView handles it all.
-	</aside>
-	</section>
-

	<!-- =============================================
	SECTION: Wrap-up
@@	@@ -386,7 +344,7 @@ socket
	<ol>
	<li class="fragment"><strong>Why Elixir?</strong> — The BEAM, 40 years of reliability</li>
	<li class="fragment"><strong>The Language</strong> — Pattern matching, processes, supervision, LiveView</li>
-	<li class="fragment"><strong>Real-World Code</strong> — 500k emails, a domain registrar, multi-site admin</li>
+	<li class="fragment"><strong>Real-World Code</strong> — marketing emails, a domain registrar, multi-site admin</li>
	</ol>
	<ul style="margin-top: 1em; list-style: none; padding: 0;">
	<li class="fragment">Concurrency is the <strong>default</strong>, not an afterthought</li>