Logging

Mantis provides structured logging utilities through its console module, allowing you to output messages with different severity levels.

Basic Usage

Use the console functions to output messages with appropriate severity levels:

main.v

module main

import khalyomede.mantis.console { info, error, debug }

fn main() {
  // Information messages
  info("Server starting on port 8080")

  // Error messages
  error("Failed to connect to database")

  // Debug messages
  debug("Request payload: {\"name\": \"John\"}")
}

Each message is automatically formatted with:

• Timestamp in RFC3339 format
• Severity level indicator
• Your message

For example:

2024-12-16T10:30:45.123Z [INFO] Server starting on port 8080

Severity Levels

The console module provides different severity levels to categorize your messages:

• DEBUG: Detailed information for debugging
• INFO: General information about system operation
• NOTICE: Significant but normal conditions
• WARNING: Warning messages for potentially problematic situations
• ERROR: Error conditions
• CRITICAL: Critical conditions requiring immediate attention
• ALERT: Action must be taken immediately
• EMERGENCY: System is unusable

Example using different severity levels:

main.v

module main

import khalyomede.mantis.console { debug, info, error }

fn main() {
  // Debug level - detailed information
  debug("Processing request payload")

  // Info level - general information
  info("User logged in successfully")

  // Error level - error conditions
  error("Database connection failed")
}