78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
package service
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import (
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"acc-server-manager/local/model"
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"acc-server-manager/local/utl/tracking"
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"bufio"
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"context"
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"os"
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"path/filepath"
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"sync"
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"github.com/google/uuid"
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)
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type FileLogStreamer struct {
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tailers sync.Map // uuid.UUID → *tracking.LogTailer
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}
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func NewFileLogStreamer() *FileLogStreamer {
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return &FileLogStreamer{}
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}
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func (s *FileLogStreamer) Start(_ context.Context, server *model.Server, handleLine func(string)) error {
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if _, exists := s.tailers.Load(server.ID); exists {
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return nil
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}
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logPath := filepath.Join(server.GetLogPath(), "server.log")
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tailer := tracking.NewLogTailer(logPath, handleLine)
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s.tailers.Store(server.ID, tailer)
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go tailer.Start()
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return nil
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}
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func (s *FileLogStreamer) Stop(serverID uuid.UUID) {
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if v, exists := s.tailers.LoadAndDelete(serverID); exists {
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v.(*tracking.LogTailer).Stop()
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}
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}
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func (s *FileLogStreamer) GetLastLines(_ context.Context, server *model.Server, n int) ([]string, error) {
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if n <= 0 {
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return []string{}, nil
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}
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logPath := filepath.Join(server.GetLogPath(), "server.log")
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f, err := os.Open(logPath)
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if err != nil {
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if os.IsNotExist(err) {
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return []string{}, nil
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}
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return nil, err
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}
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defer f.Close()
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ring := make([]string, n)
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head := 0
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count := 0
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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ring[head] = scanner.Text()
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head = (head + 1) % n
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if count < n {
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count++
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}
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}
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if err := scanner.Err(); err != nil {
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return nil, err
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}
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if count < n {
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return ring[:count], nil
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}
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out := make([]string, n)
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copy(out, ring[head:])
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copy(out[n-head:], ring[:head])
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return out, nil
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}
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