Logger Module (Go)
A simple logging system that provides structured logging with search capabilities, ported from V to Go.
Logs are stored in hourly files with a consistent format that makes them both human-readable and machine-parseable.
Features
- Structured logging with categories and error types
- Automatic timestamp management
- Multi-line message support
- Search functionality with filtering options
- Human-readable log format
Usage
package main
import (
"fmt"
"time"
"logger"
)
func main() {
// Create a new logger
l, err := logger.New("/var/logs")
if err != nil {
panic(err)
}
// Log a message
err = l.Log(logger.LogItemArgs{
Category: "system",
Message: "System started successfully",
LogType: logger.LogTypeStdout,
})
if err != nil {
panic(err)
}
// Log an error
err = l.Log(logger.LogItemArgs{
Category: "system",
Message: "Failed to connect\nRetrying in 5 seconds...",
LogType: logger.LogTypeError,
})
if err != nil {
panic(err)
}
// Search logs
fromTime := time.Now().Add(-24 * time.Hour) // Last 24 hours
results, err := l.Search(logger.SearchArgs{
TimestampFrom: &fromTime,
Category: "system", // Filter by category
Message: "failed", // Search in message content
LogType: logger.LogTypeError, // Only error messages
MaxItems: 100, // Limit results
})
if err != nil {
panic(err)
}
for _, item := range results {
fmt.Printf("[%s] %s: %s\n", item.Timestamp.Format(time.RFC3339), item.Category, item.Message)
}
}