Logging

Introduction

In order to understand the running status of the application, Goravel provides a powerful log service that can record log messages and system errors to a file or other channels through facades.Log().

Configuration

To configure various log channels, custom configurations can be made in config/logging.go.

Goravel uses stack channel to record logs by default, stack allows logs to be forwarded to multiple channels.

The print configuration in single and daily drivers can control log output to the console.

Available channel drivers

Name	Description
`stack`	Allow multiple channels
`single`	Single log file
`daily`	One log file per day
`custom`	Custom drive

Inject Context

facades.Log().WithContext(ctx)

Write log messages

facades.Log().Debug(message)
facades.Log().Debugf(message, args)
facades.Log().Info(message)
facades.Log().Infof(message, args)
facades.Log().Warning(message)
facades.Log().Warningf(message, args)
facades.Log().Error(message)
facades.Log().Errorf(message, args)
facades.Log().Fatal(message)
facades.Log().Fatalf(message, args)
facades.Log().Panic(message)
facades.Log().Panicf(message, args)

Write to a specific channel

Sometimes, you may want to record messages to a channel other than the application's default channel:

facades.Log().Channel("single").Info(message)

If you want to write to multiple channels at the same time, you can use the Stack method:

facades.Log().Stack([]string{"single", "slack"}).Info(message)

Chain Methods

Goravel provides convenient chain methods, that make it easy to insert more useful information into the log:

facades.Log().User("John").Debug(message)

Method	Action
Code	Set a code or slug that describes the log.
Hint	Set a hint for faster debugging.
In	Set the feature category or domain in which the log entry is relevant.
Owner	Useful for alerting purposes.
Request	Supplies a http.Request.
Response	Supplies a http.Response.
Tags	Add multiple tags, describing the feature returning an error.
User	Set the user associated with the log entry.
With	Add key-value pairs to the context of the log entry.
WithTrace	Add stack information to the log entry.

Create a custom channel

If you want to define a completely custom channel, you can specify the custom driver type in the config/logging.go configuration file. Then include a via option to implement a framework\contracts\log\Logger structure:

// config/logging.go
"custom": map[string]interface{}{
    "driver": "custom",
    "via":    &CustomTest{},
},

Implement Driver

Implement framework\contracts\log\Logger interface.

// framework/contracts/log/Logger
package log

type Logger interface {
  // Handle pass channel config path here
  Handle(channel string) (Hook, error)
}

files can be stored in the app/extensions folder (modifiable). Example:

package extensions

import (
  "fmt"

  "github.com/goravel/framework/contracts/log"
)

type Logger struct {
}

// Handle pass channel config path here
func (logger *Logger) Handle(channel string) (log.Hook, error) {
  return &Hook{}, nil
}

type Hook struct {
}

// Levels monitoring level
func (h *Hook) Levels() []log.Level {
  return []log.Level{
    log.DebugLevel,
    log.InfoLevel,
    log.WarningLevel,
    log.ErrorLevel,
    log.FatalLevel,
    log.PanicLevel,
  }
}

// Fire execute logic when trigger
func (h *Hook) Fire(entry log.Entry) error {
  fmt.Printf("context=%v level=%v time=%v message=%s", entry.Context(), entry.Level(), entry.Time(), entry.Message())

  return nil
}