11/21/2023 0 Comments Twitch rewind 5 seconds![]() It's possible to either use GenServer.call or GenServer.cast with a message atom to activate a specific method via pattern matching. Your viewers won’t be able to rewind freely if your stream becomes too long. Now go to the Stream dashboard and click on Enable DVR. this morning we watched & ranked EVERY youtube rewind on /tyleroakley. From the Stream tab, start a live stream now or schedule it from the Manage Tab. The Gen Server abstraction provides an architecture that allows us to separate our module code into message senders and handle receivers. To do so, follow along with these steps: Head to YouTube Studio. While using this abstraction, we're able to separate our client and server code by defining handle methods for each message and acting correctly on them. The common way is by using the receive block (under the hood or explicitly) to handle those messages via pattern matching and spawn another processes with the correct action to take. Well, using a Gen server is similar to gluing all those concepts together (both async processes and state management) with a single and easy-to-use API and with a very important concept implemented: a mailbox for message-based architecture.Ī mailbox is a common term in the elixir community that describes a module that can receive messages and act on it. If you know languages like JavaScript or csharp, you may recall the async await syntax from them.Īfter all this, you may be wondering why we need to use a Gen Server if we already have those modules presented above. It's pretty easy to use as you can see below in the example:Įnter fullscreen mode Exit fullscreen mode The Agent module provides a simple and efficient way to manage state, personally I view this module as an data structure for the process architecture because you can control any primitive value through a pid and getters/setters. If you want to know more in detail about those modules, reach out to the previous article linked at the beginning. Today, we can write our own module that handles some state and implement a method that uses the receive block to create a "mailbox", or we can use simple abstractions such as Agent and Task to either hold state only or manage asynchronous tasks only.įirst, let's rewind a bit and understand what we do to share state in a process using simpler abstractions. If you want, you can adjust the slider on the main video feed to raise or lower it. To rewind a stream, it should be turned off for two minutes. ![]() ![]() You can replay a live stream by dragging the rewind button on the Twitch web app. It's really important to understand what problem we're trying to solve before we even consider which implementation we should try, right? So the problem here is lack of abstraction around long running processes. If you’re not watching, you can also adjust the slider on the main video feed to watch anything you missed. What is Gen server and what problem it solves What is Gen server and what problem it solves.In this article, we'll talk a little about an abstraction that allows the management of long-running processes with state and message communication for running functions accordingly! I hope it'll be fun and easy to understand. It's possible to manage state between multiple long-running processes through known abstractions such as Agent. In Elixir, every function runs inside a separate process, and we can deal with processes in a very natural way offered by the language.
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