Log

A high-performance, buffered, rotating file logger for Go applications with built-in disk management, operational monitoring, and framework compatibility adapters.

Key Features

• Buffered async logging with minimal application impact
• Automatic file rotation and disk space management
• Operational heartbeats for production monitoring
• Hot reconfiguration with draining on restart
• Framework adapters for gnet v2, fasthttp, Fiber v2
• Production-grade reliability with graceful shutdown

Quick Start

package main

import (
	"fmt"
	
    "github.com/lixenwraith/log"
)

func main() {
    // Create and initialize logger
    logger := log.NewLogger()
    err := logger.ApplyConfigString("directory=/var/log/myapp", "enable_file=true", "format=txt")
    if err != nil {
        panic(fmt.Errorf("failed to apply logger config: %w", err))
    }
    defer logger.Shutdown()

    // Start logging
	if err = logger.Start(); err != nil {
        panic(fmt.Errorf("failed to start logger: %w", err))
    }
    logger.Info("Application started", "version", "1.0.0")
    logger.Debug("Debug information", "user_id", 12345)
    logger.Warn("Warning message", "threshold", 0.95)
    logger.Error("Error occurred", "code", 500)
}

Installation

go get github.com/lixenwraith/log

Documentation

• Getting Started - Installation and basic usage
• Configuration Guide - Configuration options
• Configuration Builder - Builder pattern guide
• API Reference - Complete API documentation
• Logging Guide - Logging methods and best practices
• Formatting & Sanitization - Standalone formatter and sanitizer packages
• Disk Management - File rotation and cleanup
• Heartbeat Monitoring - Operational statistics
• Compatibility Adapters - Framework integrations
• Testing and Performance - Race, stress, fuzz, and benchmark commands

Architecture Overview

Applications enqueue records into a bounded channel. A single background processor formats records, writes output, rotates files, and performs cleanup. A short read lock coordinates enqueues with lifecycle changes; producers never wait for queue capacity or output I/O. Full queues drop records and increment counters.

Call ApplyConfig (or Build) and then Start before logging. Stop drains accepted records and can be followed by Start. Shutdown also closes the file; after a timeout, retry it to finish cleanup. See the API reference for ownership and concurrency rules.

Hosts that own the terminal, such as TUIs, route console output with SetConsoleWriter and internal diagnostics with SetErrorHandler.

Contributing

Contributions and suggestions are welcome! There is no contribution policy, but if interested, please submit pull requests to the repository. Submit suggestions or issues at issue tracker.

License

BSD-3-Clause