Question 1

How do I set up Logforth to log to both stdout and a file?

Accepted Answer

Use the builder pattern with multiple dispatches: configure one dispatch with a filter for stdout and another for a file appender, as shown in the advanced usage example in the README. This allows routing logs based on severity or other criteria to different outputs.

Question 2

Logforth vs env_logger: which is better for Rust logging?

Accepted Answer

Logforth excels in complex, modular logging setups with multiple dispatches and custom appenders, while env_logger is simpler for basic console logging with environment variables. Choose Logforth for production-grade flexibility, or env_logger for quick, minimal configuration.

Question 3

How to integrate Logforth with OpenTelemetry for distributed tracing?

Accepted Answer

Configure an OpenTelemetry appender using the opentelemetry_otlp exporter, as demonstrated in the README. This involves setting up an async runtime, creating an exporter with an endpoint, and using the OpentelemetryLogBuilder to attach logs to tracing contexts.

Question 4

Can I use Logforth in async Rust applications?

Accepted Answer

Yes, Logforth supports async logging through the Async appender combiner, which makes other appenders non-blocking. It also offers task-local diagnostics for async contexts, making it suitable for asynchronous applications without blocking threads.

Question 5

How to customize log formats in Logforth, like JSON or logfmt?

Accepted Answer

Use built-in layouts such as JsonLayout or LogfmtLayout with appenders that support layouts. For custom formats, implement the Layout trait and integrate it into your appender configuration, as described in the layouts section of the README.

Question 6

What is the minimum Rust version for Logforth, and does it change often?

Accepted Answer

The minimum supported Rust version is 1.89.0, and the policy allows it to be increased in minor updates, so you should check the version requirements when upgrading to avoid compatibility issues in your project.

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