Elixir School

iex> defmodule Hello do ...> def print(lang \\ :en) ...> def print(:de), do: "Hallo Welt" ...> def print(:en), do: "Hello World" ...> def print(:es), do: "Hola Mundo" ...> def print(:ru), do: "Привет мир" ...> end iex> Hello.print() "Hello World!" iex> Hello.print(:es) "Hola Mundo" iex> Hello.print(:ru) "Привет мир"

Real-Time SVG Charts with Contex and LiveView

06 Oct 2020 in General

Learn how to use the Contex package to render server-side SVG charts that you can update in real-time with LiveView.

Instrumenting Phoenix with Telemetry Part IV: Erlang VM Measurements with `telemetry_poller`

13 May 2020 in General

In this series, we’re instrumenting a Phoenix app and sending metrics to StatsD with the help of Elixir and Erlang’s Telemetry offerings. In Part III we’ll incorporate Erlang’s telemetry_poller library into our Phoenix app so that we can observe and report on Erlang VM Telemetry events.

Instrumenting Phoenix with Telemetry Part III: Phoenix + Ecto Telemetry Events

06 May 2020 in General

In this series, we’re instrumenting a Phoenix app and sending metrics to StatsD with the help of Elixir and Erlang’s Telemetry offerings. In Part III we’ll examine Phoenix and Ecto’s out-of-the-box Telemetry events and use Telemetry.Metrics to observe a wide-range of such events.

Instrumenting Phoenix with Telemetry Part II: Telemetry Metrics + Reporters

29 Apr 2020 in General

In this series, we’re instrumenting a Phoenix app and sending metrics to StatsD with the help of Elixir and Erlang’s Telemetry offerings. In Part II we’ll use Elixir’s Telemetry.Metrics and TelemetryMetricsStatsd libraries to define and send metrics to StatsD for a given Telemetry event.

Instrumenting Phoenix with Telemetry and LiveDashboard

24 Apr 2020 in General

The recent release of the LiveDashboard library allows us to visualize our application metrics, performance and behavior in real-time. In this post, we’ll add LiveDashboard to our Phoenix app, examine the out-of-the-box features and take a look under the hood to understand how LiveDashboard hooks into Telemetry events in order to visualize them.

Instrumenting Phoenix with Telemetry Part I: Telemetry Under The Hood

22 Apr 2020 in General

In this series, we’re instrumenting a Phoenix app and sending metrics to StatsD with the help of Elixir and Erlang’s Telemetry offerings. In Part I we’ll start out by setting up a basic, DIY Telemetry pipeline and examining how Erlang’s Telemetry library works under the hood