LOGGER

Logger Module in Vint

The Logger module in Vint provides structured logging functionality with different severity levels and timestamps. This module helps you log messages to stdout and stderr with proper formatting and timestamps.

---

Importing the Logger Module

To use the Logger module, simply import it:

import logger

---

Functions and Examples

1. Log Info Messages (info)

The info function logs informational messages to stdout with a timestamp and INFO level indicator.

Syntax:

info(message)

Example:

import logger

logger.info("Application started successfully")
// Output: [2024-01-15 14:30:25] INFO: Application started successfully

---

2. Log Warning Messages (warn)

The warn function logs warning messages to stdout with a timestamp and WARN level indicator.

Syntax:

warn(message)

Example:

import logger

logger.warn("This is a warning message")
// Output: [2024-01-15 14:30:25] WARN: This is a warning message

---

3. Log Error Messages (error)

The error function logs error messages to stderr with a timestamp and ERROR level indicator.

Syntax:

error(message)

Example:

import logger

logger.error("Something went wrong")
// Output: [2024-01-15 14:30:25] ERROR: Something went wrong

---

4. Log Debug Messages (debug)

The debug function logs debug information to stdout with a timestamp and DEBUG level indicator.

Syntax:

debug(message)

Example:

import logger

logger.debug("Debug information for troubleshooting")
// Output: [2024-01-15 14:30:25] DEBUG: Debug information for troubleshooting

---

5. Log Fatal Messages (fatal)

The fatal function logs fatal error messages to stderr with a timestamp and FATAL level indicator.

Syntax:

fatal(message)

Example:

import logger

logger.fatal("Critical system failure")
// Output: [2024-01-15 14:30:25] FATAL: Critical system failure

---

Usage Example

import logger

print("=== Logger Module Example ===")

// Log application lifecycle
logger.info("Application starting...")
logger.debug("Loading configuration...")
logger.info("Configuration loaded successfully")

// Simulate some warnings and errors
logger.warn("Low disk space detected")
logger.error("Failed to connect to database")
logger.fatal("Unable to recover from critical error")

---

Summary of Functions

Function	Description	Output Destination
info	Logs informational messages with timestamp	stdout
warn	Logs warning messages with timestamp	stdout
error	Logs error messages with timestamp	stderr
debug	Logs debug information with timestamp	stdout
fatal	Logs fatal error messages with timestamp	stderr

All log messages include timestamps in the format YYYY-MM-DD HH:MM:SS for easy tracking and debugging.