Question 1

How do I set up Logging gem in a Rails application?

Accepted Answer

Integrate it by requiring the gem in an initializer, then configure loggers per model or controller using the hierarchical system, similar to the class examples in the README. You might need to replace Rails' default logger for full control.

Question 2

Logging vs Ruby's built-in Logger: which should I use?

Accepted Answer

Choose Logging if you need hierarchical logging, custom levels, or multiple appenders; it's more flexible but complex. Ruby's Logger is simpler and built-in, better for basic needs without extra dependencies.

Question 3

How to add a custom appender like email logging?

Accepted Answer

Use the plugin system: create a gem following the three-step process in the Extending section, such as the logging-email plugin, which defines an initializer in lib/logging/plugins/email.rb.

Question 4

Does Logging support JSON output for structured logging?

Accepted Answer

Yes, but not out-of-the-box; you can achieve it through custom layouts or plugins, as the formatting examples show flexibility, but it requires additional setup compared to dedicated structured logging libraries.

Question 5

What are the performance implications of using Logging?

Accepted Answer

It may introduce overhead due to its feature-rich nature, especially with multiple appenders or complex hierarchies, so benchmark for high-throughput applications where minimal logging is preferred.

Question 6

How to configure log levels per module in Logging?

Accepted Answer

Set the level on logger instances using namespaces, like Logging.logger['ModuleName'].level = :debug, as shown in the hierarchies and classes examples in the README.

Logging

What is Logging?

Overview

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Frequently Asked Questions