April 14, 2019

Managing Persistent Connections Using gen_statem in Elixir

227

clicks

Managing Persistent Connections Using gen_statem in Elixir

Source: andrealeopardi.com

Erlang OTP Concurrency

Andrea Leopardi illustrates how Elixir's gen_statem behavior can be employed to create a process that maintains a persistent TCP connection with an external database, acting as a connection manager. The process is designed to be resilient and will remain active and attempt reconnection in case the external TCP connection fails, which reflects the philosophy of Erlang and Elixir where systems are built to be fault-tolerant and self-healing. The article also explains the transition from previous implementations using the 'connection' library to gen_statem, the advantages of asynchronous connections, and introduces the concept of state machines using gen_statem. It covers the basics of implementing a connection manager that can handle transitions between connected and disconnected states, manage client requests, and handle errors. Additionally, Leopardi demonstrates how to add timeouts to implement back-offs for reconnecting after failures and concludes with advanced concepts like dynamic state and handling event functions in gen_statem.

Continue reading

Related posts

Using Elixir's Registry for Process Pooling

Andrea Leopardi explores process pooling strategies in Elixir using Elixir's built-in Registry. The post discusses the differences between checkout pools and routing pools, provides code examples, and explains how to implement different routing strategies within a pool.

Apr 25, 2020

Combining Example-Based and Property-Based Testing in Elixir

Andrea Leopardi believes that example-based tests and property-based tests are like good friends. By combining the ability of property-based testing to test a wide range of input data with practical example-based tests, you can ensure that your code behaves as expected on real inputs and discover unhandled corner cases. Leopardi shares an example of how this technique can be used and emphasizes the effectiveness and practicality of this approach.

Jan 09, 2022

Structured Logging in Phoenix Applications

Sophie DeBenedetto provides a guide on configuring a Phoenix LiveView application to use a structured logger with logfmt format and how to integrate it with AppSignal for log correlation. The post emphasizes the benefits of structured logging and offers tips on optimizing logging in Phoenix applications.

Jul 18, 2023

© HashMerge 2024