daily-logger

A Rust logging library that provides daily file rotation and colored console output with support for order-specific logging.

Features

• Daily log rotation: Automatically creates separate log files for each day
• Order-specific logging: Support for UUID-based order logs
• Colored console output: Different colors for different log levels
• Dual output: Simultaneous logging to console and files with separate level controls
• File caching: Efficient file handle management with LRU cache
• Thread-safe: Built with concurrency in mind

Installation

Add this to your Cargo.toml:

[dependencies]
daily-logger = "0.1.0"

Usage

Basic Setup

use daily_logger::init_logger;
use log::{info, warn, error, debug, trace};

fn main() {
    // Initialize logger with console level, file level, and base path
    init_logger(
        log::LevelFilter::Info,  // Console output level
        log::LevelFilter::Debug, // File output level  
        "/path/to/logs"          // Base directory for log files
    );

    // Use standard log macros
    info!("Application started");
    warn!("This is a warning");
    error!("An error occurred");
}

Order-Specific Logging

The logger supports special UUID-based logging for tracking specific orders or transactions:

use log::info;

fn main() {
    daily_logger::init_logger(
        log::LevelFilter::Info,
        log::LevelFilter::Info,
        "/var/logs"
    );

    let order_id = "123e4567-e89b-12d3-a456-426614174000";
    
    // This will create a separate log file: order_123e4567-e89b-12d3-a456-426614174000.log
    info!(target: "orders", uuid = order_id; "Order processing started");
    info!(target: "orders", uuid = order_id; "Payment validated");
    info!(target: "orders", uuid = order_id; "Order completed");
}

Log Output Formats

Console Output

Console logs are colored by level and include timestamps:

2024-01-15T10:30:45+00:00-INFO|[orders]<123e4567>:Order processing started

File Output

Files are created in the base directory:

• Daily logs: log_2024_1_15.log (contains all logs for the day)
• Order logs: order_123e4567-e89b-12d3-a456-426614174000.log (UUID-specific logs)

Log Levels

The library supports standard log levels with color coding:

Configuration

Level Filtering

You can set different log levels for console and file output:

daily_logger::init_logger(
    log::LevelFilter::Warn,  // Only warnings and errors to console
    log::LevelFilter::Trace, // All levels to files
    "/var/logs"
);

File Management

The logger uses an internal file cache (max 32 files) with LRU eviction to efficiently manage file handles. Log directories are created automatically if they don't exist.

Dependencies

• chrono - Date and time handling
• log - Logging facade
• once_cell - Thread-safe lazy initialization
• dashmap - Concurrent hash map (if used in your implementation)

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.