Introduction to Jack-Logger

The jack-logger is a powerful and flexible logging library designed to make web development and software engineering a breeze. With its dozens of useful APIs, you can easily keep track of your application’s performance and errors, ensuring a smooth and efficient user experience.

Key Features and API Examples

Basic Logging

Logging simple messages:

  logger := jack.New()
  logger.Info("This is an info message")

Error Logging

Logging errors with stack traces:

  err := errors.New("Something went wrong!")
  logger.Error("An error occurred", err)

Custom Log Levels

Creating custom log levels:

  debugLevel := jack.NewLogLevel("DEBUG", 1)
  logger.SetLogLevel(debugLevel)
  logger.Log(debugLevel, "Debugging application...")

Structured Logging

Adding metadata to logs:

  logger.WithFields(jack.Fields{
      "user_id": "1234",
      "order_id": "5678",
  }).Info("User order processed")

JSON Logging

Output logs in JSON format:

  logger.SetFormatter(&jack.JSONFormatter{})
  logger.Info("This log is in JSON format")

Integrating Jack-Logger in Your App

Here’s an example of how you can integrate jack-logger into a simple web application:

  package main

  import (
      "net/http"
      "github.com/jack-logger"
  )

  var logger = jack.New()

  func homeHandler(w http.ResponseWriter, r *http.Request) {
      logger.Info("Home page accessed")
      w.Write([]byte("Welcome to the Home Page!"))
  }

  func main() {
      http.HandleFunc("/", homeHandler)
      logger.Info("Starting server on :8080")
      if err := http.ListenAndServe(":8080", nil); err != nil {
          logger.Error("Server error", err)
      }
  }

By using jack-logger, you ensure that every important event in your application is logged correctly, helping you maintain and debug your system effectively.

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