Debug/Debugf are very useful methods for recording debug information, commonly used in development/testing environments. When the application goes live, you can easily enable/disable them using SetDebug or configuration files.

package main

import (
    "context"
    "time"

    "github.com/gogf/gf/v2/frame/g"
    "github.com/gogf/gf/v2/os/gtime"
    "github.com/gogf/gf/v2/os/gtimer"
)

func main() {
    ctx := context.TODO()
    gtimer.SetTimeout(ctx, 3*time.Second, func(ctx context.Context) {
        g.Log().SetDebug(false)
    })
    for {
        g.Log().Debug(ctx, gtime.Datetime())
        g.Log().Info(ctx, gtime.Datetime())
        time.Sleep(time.Second)
    }
}

In this example, the glog.Debug method is used to output debug information. After 3 seconds, the output of debug information is turned off. After execution, the output result shows only 3 log entries. Subsequent debug log information is not output because it is turned off using the SetDebug method.

2022-01-05 15:59:05.674 [DEBU] 2022-01-05 15:59:05
2022-01-05 15:59:05.675 [INFO] 2022-01-05 15:59:05
2022-01-05 15:59:06.684 [DEBU] 2022-01-05 15:59:06
2022-01-05 15:59:06.684 [INFO] 2022-01-05 15:59:06
2022-01-05 15:59:07.692 [DEBU] 2022-01-05 15:59:07
2022-01-05 15:59:07.692 [INFO] 2022-01-05 15:59:07
2022-01-05 15:59:08.708 [INFO] 2022-01-05 15:59:08
2022-01-05 15:59:09.717 [INFO] 2022-01-05 15:59:09
2022-01-05 15:59:10.728 [INFO] 2022-01-05 15:59:10
2022-01-05 15:59:11.733 [INFO] 2022-01-05 15:59:11

We can also disable debug information via command line parameters or system environment variables.

1. Modify the command line startup parameter - gf.glog.debug=false;
2. Modify the specified environment variable - GF_GLOG_DEBUG=false;