81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package notifier
|
|
|
|
import (
|
|
"encoding/json"
|
|
"os"
|
|
"sync"
|
|
"time"
|
|
|
|
"git.riou.xyz/jriou/pgterminate/base"
|
|
"git.riou.xyz/jriou/pgterminate/log"
|
|
)
|
|
|
|
// File structure for file notifier
|
|
type File struct {
|
|
handle *os.File
|
|
format string
|
|
name string
|
|
sessions chan *base.Session
|
|
mutex sync.Mutex
|
|
}
|
|
|
|
// NewFile creates a file notifier
|
|
func NewFile(name string, format string, sessions chan *base.Session) Notifier {
|
|
return &File{
|
|
name: name,
|
|
format: format,
|
|
sessions: sessions,
|
|
}
|
|
}
|
|
|
|
// Run starts the file notifier
|
|
func (f *File) Run() {
|
|
log.Info("Starting file notifier")
|
|
f.open()
|
|
defer f.terminate()
|
|
|
|
for session := range f.sessions {
|
|
timestamp := time.Now().Format(time.RFC3339)
|
|
var line string
|
|
if f.format == "json" {
|
|
line = jsonLine(timestamp, session)
|
|
} else {
|
|
line = timestamp + " " + session.Format(f.format)
|
|
}
|
|
_, err := f.handle.WriteString(line + "\n")
|
|
base.Panic(err)
|
|
}
|
|
}
|
|
|
|
// jsonLine marshals a session as a self-contained JSON object including the
|
|
// timestamp, so each file line stays valid JSON instead of being prefixed
|
|
func jsonLine(timestamp string, session *base.Session) string {
|
|
b, _ := json.Marshal(struct {
|
|
Timestamp string `json:"timestamp"`
|
|
*base.Session
|
|
}{timestamp, session})
|
|
return string(b)
|
|
}
|
|
|
|
// open opens a log file
|
|
func (f *File) open() {
|
|
var err error
|
|
f.handle, err = os.OpenFile(f.name, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
|
|
base.Panic(err)
|
|
}
|
|
|
|
// Reload closes and re-open the file to be compatible with logrotate
|
|
func (f *File) Reload() {
|
|
log.Info("Reloading file notifier")
|
|
f.mutex.Lock()
|
|
defer f.mutex.Unlock()
|
|
log.Debugf("Re-opening log file %s\n", f.name)
|
|
f.handle.Close()
|
|
f.open()
|
|
}
|
|
|
|
// terminate closes the file
|
|
func (f *File) terminate() {
|
|
log.Debugf("Closing log file %s\n", f.name)
|
|
f.handle.Close()
|
|
}
|