578 lines
20 KiB
Go
578 lines
20 KiB
Go
package common
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import (
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"archive/tar"
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"bytes"
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"context"
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"fmt"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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"strings"
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"sync"
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"syscall"
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"github.com/gogf/gf/v2/errors/gerror"
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"github.com/gogf/gf/v2/frame/g"
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"golang.org/x/crypto/ssh"
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)
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// TrainingRunner 训练通道抽象（config.yml training.mode 选择实现）：训练机与 Go 服务器
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// 可同机（subprocess）或异机（ssh）。任务脚本 server/training/train_server.py 以 --task-json 驱动，
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// 产物约定（相对训练机 workdir）：
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//
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// tasks/<taskId>.json 任务参数（Go 侧写入）
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// logs/<taskId>.jsonl 每 epoch 一行 JSON：{"epoch","total","metrics"}
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// results/<taskId>.json 结束结果：{"metrics","names","best_tflite"(相对路径)}
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type TrainingRunner interface {
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// Start 启动训练进程，返回可探测存活的 pid（subprocess 本机 pid；ssh 远程 pid）
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Start(ctx context.Context, job *TrainingJob) (int, error)
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// IsAlive 进程存活探测
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IsAlive(ctx context.Context, job *TrainingJob) (bool, error)
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// Cancel 终止训练（杀进程组，含 ultralytics 子进程）
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Cancel(ctx context.Context, job *TrainingJob) error
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// FetchLogTail 拉取日志尾部（截断 N KB 返回，供轮询解析 epoch 进度）
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FetchLogTail(ctx context.Context, job *TrainingJob) (string, error)
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// FetchResult 读取结束结果 JSON 内容；不存在返回 nil（任务仍在跑）
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FetchResult(ctx context.Context, job *TrainingJob) (string, error)
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// FetchArtifact 把训练机产物文件拉回服务器本地路径
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FetchArtifact(ctx context.Context, job *TrainingJob, remoteName, localPath string) error
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// PushArtifact 把服务器本地文件推到训练机（增量训练基座权重，2026-09-09；
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// remoteName 相对训练机 workdir）
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PushArtifact(ctx context.Context, job *TrainingJob, remoteName, localPath string) error
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// SyncYoloDataset 把训练集包落到训练机（subprocess 直写 workdir，原图硬链接引用；ssh 走 tar 流式管道，本地不落盘）
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SyncYoloDataset(ctx context.Context, job *TrainingJob, pkg *YoloPackage) error
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// CleanupYoloDataset 删除训练机上的数据集目录（任务终态调用：成功/失败/取消，防 GB 级残留）
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CleanupYoloDataset(ctx context.Context, job *TrainingJob) error
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// WriteTaskJson 把任务参数文件写到训练机（随 Start 前的准备阶段调用）
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WriteTaskJson(ctx context.Context, job *TrainingJob, content string) error
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}
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// YoloFile 训练集包内单个文件：Name 为包内相对路径（如 images/train/x.jpg / dataset.yaml），
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// ImagePath 非空时内容取自该文件（原图直接读数据集目录，不复制暂存），否则用 Content。
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type YoloFile struct {
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Name string
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ImagePath string
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Content []byte
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}
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// YoloPackage 内存中的 YOLO 训练集包（训练前按 80/20 拆 train/val 组装，不落本地磁盘）
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type YoloPackage struct {
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Files []YoloFile
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}
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// TrainingJob 训练任务运行信息（runner 视角；字段为训练机路径布局）。
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// SSH 凭据不随任务传递：sshRunner 直接读 config.yml training.ssh 节点。
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type TrainingJob struct {
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TaskId int64
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DatasetName string // yolo 数据集目录名（训练机 datasetDir/yolo/<name>）
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Python string // 训练机 venv python 路径
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Workdir string // 训练机工作目录（train_server.py / yolov8s.pt 所在）
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DatasetDir string // 训练机数据集根目录（相对 workdir）
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Pid int // DB 持久化的进程 pid（Go 重启后 subprocess 内存 map 丢失，按此兜底探活/取消）
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}
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// Runner 按 config.yml training.mode 返回训练通道（未配置返回 nil，调用方判 CodeTrainingNotConfigured）
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func Runner(ctx context.Context) TrainingRunner {
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mode := g.Cfg().MustGet(ctx, "training.mode", "").String()
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switch mode {
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case "subprocess":
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return &subprocessRunner{}
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case "ssh":
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return &sshRunner{}
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default:
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return nil
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}
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}
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// TrainingConfig 训练通道配置快照
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type TrainingConfig struct {
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Workdir string
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DatasetDir string
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Python string
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TimeoutMins int
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Model string // s 档(高识别)训练基座权重（训练机 workdir 下，如 yolov8s.pt）
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Imgsz int // s 档训练/导出分辨率
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ModelN string // n 档(高性能)训练基座权重（如 yolov8n.pt）
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ImgszN int // n 档训练/导出分辨率
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Epochs int
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Batch int
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Device string
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}
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// TrainingConfigOf 读取训练通道配置（未配置返回 ok=false）
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func TrainingConfigOf(ctx context.Context) (TrainingConfig, bool) {
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cfg := TrainingConfig{
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Workdir: g.Cfg().MustGet(ctx, "training.workdir").String(),
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DatasetDir: g.Cfg().MustGet(ctx, "training.datasetDir", "datasets").String(),
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Python: g.Cfg().MustGet(ctx, "training.venvPython").String(),
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TimeoutMins: g.Cfg().MustGet(ctx, "training.timeoutMinutes", 0).Int(),
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Model: g.Cfg().MustGet(ctx, "training.model", "yolov8s.pt").String(),
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Imgsz: g.Cfg().MustGet(ctx, "training.imgsz", 1280).Int(),
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ModelN: g.Cfg().MustGet(ctx, "training.modelN").String(),
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ImgszN: g.Cfg().MustGet(ctx, "training.imgszN").Int(),
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Epochs: g.Cfg().MustGet(ctx, "training.epochs", 150).Int(),
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Batch: g.Cfg().MustGet(ctx, "training.batch", 16).Int(),
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Device: g.Cfg().MustGet(ctx, "training.device", "0").String(),
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}
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return cfg, cfg.Workdir != "" && cfg.Python != ""
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}
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// ---------------- subprocess 实现（同机） ----------------
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type subprocessRunner struct {
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mu sync.Mutex
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cmds map[int64]*exec.Cmd // taskId → 进程（并发度 1，实际最多一条）
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}
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func (r *subprocessRunner) Start(ctx context.Context, job *TrainingJob) (int, error) {
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script := filepath.Join(job.Workdir, "train_server.py")
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taskJson := filepath.Join(job.Workdir, "tasks", fmt.Sprintf("%d.json", job.TaskId))
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cmd := exec.Command(job.Python, script, "--task-json", taskJson)
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cmd.Dir = job.Workdir
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// 独立进程组：取消时 kill 整个组，连带 ultralytics 的子进程
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cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
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// stdout/stderr 落盘：进程异常退出时 traceback 可查（此前被吞，失败零证据）
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_ = os.MkdirAll(filepath.Join(job.Workdir, "logs"), 0o755)
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out, err := os.OpenFile(filepath.Join(job.Workdir, "logs", fmt.Sprintf("%d.out", job.TaskId)),
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os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
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if err == nil {
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cmd.Stdout = out
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cmd.Stderr = out
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}
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if err := cmd.Start(); err != nil {
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if out != nil {
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_ = out.Close()
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}
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return 0, gerror.Wrap(err, "启动训练进程失败")
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}
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r.mu.Lock()
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if r.cmds == nil {
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r.cmds = map[int64]*exec.Cmd{}
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}
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r.cmds[job.TaskId] = cmd
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r.mu.Unlock()
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// Wait 收尸防僵尸进程（轮询模式不 Wait 的话，退出的子进程成 zombie、Signal(0) 恒成功）；
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// 收尸后删 map，IsAlive 落到 job.Pid 兜底探测
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go func() {
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_ = cmd.Wait()
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if out != nil {
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_ = out.Close()
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}
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r.mu.Lock()
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delete(r.cmds, job.TaskId)
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r.mu.Unlock()
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}()
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return cmd.Process.Pid, nil
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}
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func (r *subprocessRunner) IsAlive(ctx context.Context, job *TrainingJob) (bool, error) {
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r.mu.Lock()
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cmd := r.cmds[job.TaskId]
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r.mu.Unlock()
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if cmd != nil && cmd.Process != nil {
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if err := cmd.Process.Signal(syscall.Signal(0)); err == nil {
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return true, nil
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}
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return false, nil
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}
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// Go 重启后内存 map 丢失但训练进程仍在跑：按 DB 持久化 pid 探活（负 pid = 进程组）
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if job.Pid > 0 {
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return syscall.Kill(-job.Pid, syscall.Signal(0)) == nil, nil
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}
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return false, nil
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}
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func (r *subprocessRunner) Cancel(ctx context.Context, job *TrainingJob) error {
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r.mu.Lock()
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cmd := r.cmds[job.TaskId]
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r.mu.Unlock()
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if cmd != nil && cmd.Process != nil {
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// 杀进程组（负 pid），覆盖 python + ultralytics 子进程
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_ = syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)
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return nil
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}
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// Go 重启后兜底：按 DB pid 杀进程组
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if job.Pid > 0 {
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_ = syscall.Kill(-job.Pid, syscall.SIGKILL)
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}
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return nil
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}
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func (r *subprocessRunner) FetchLogTail(ctx context.Context, job *TrainingJob) (string, error) {
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path := filepath.Join(job.Workdir, "logs", fmt.Sprintf("%d.jsonl", job.TaskId))
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return tailFile(path, 8*1024)
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}
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func (r *subprocessRunner) FetchResult(ctx context.Context, job *TrainingJob) (string, error) {
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path := filepath.Join(job.Workdir, "results", fmt.Sprintf("%d.json", job.TaskId))
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data, err := os.ReadFile(path)
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if err != nil {
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if os.IsNotExist(err) {
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return "", nil
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}
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return "", err
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}
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return string(data), nil
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}
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func (r *subprocessRunner) FetchArtifact(ctx context.Context, job *TrainingJob, remoteName, localPath string) error {
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src := filepath.Join(job.Workdir, filepath.FromSlash(remoteName))
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data, err := os.ReadFile(src)
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if err != nil {
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return gerror.Wrap(err, "读取训练机产物失败")
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}
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return WriteFileAtomic(localPath, data)
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}
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func (r *subprocessRunner) PushArtifact(ctx context.Context, job *TrainingJob, remoteName, localPath string) error {
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data, err := os.ReadFile(localPath)
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if err != nil {
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return gerror.Wrap(err, "读取待推送文件失败")
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}
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dst := filepath.Join(job.Workdir, filepath.FromSlash(remoteName))
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return WriteFileAtomic(dst, data)
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}
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func (r *subprocessRunner) SyncYoloDataset(ctx context.Context, job *TrainingJob, pkg *YoloPackage) error {
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// 同机训练：训练进程直接读 workdir 下文件，包直写目标目录（无中间暂存）。
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// 原图用硬链接引用项目数据集目录（同卷 0 空间占用，训练机=开发机架构下原图只存一份），
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// 跨卷等 os.Link 失败场景回退拷贝
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dst := filepath.Join(job.Workdir, job.DatasetDir, "yolo", job.DatasetName)
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_ = os.RemoveAll(dst)
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for _, f := range pkg.Files {
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dstPath := filepath.Join(dst, filepath.FromSlash(f.Name))
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if f.ImagePath != "" {
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if err := os.MkdirAll(filepath.Dir(dstPath), 0o755); err != nil {
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return err
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}
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if err := os.Link(f.ImagePath, dstPath); err == nil {
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continue
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}
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imgData, rErr := os.ReadFile(f.ImagePath)
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if rErr != nil {
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return gerror.Wrapf(rErr, "读取原图失败: %s", f.ImagePath)
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}
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if err := WriteFileAtomic(dstPath, imgData); err != nil {
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return err
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}
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continue
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}
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if err := WriteFileAtomic(dstPath, f.Content); err != nil {
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return err
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}
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}
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return nil
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}
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func (r *subprocessRunner) CleanupYoloDataset(ctx context.Context, job *TrainingJob) error {
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dst := filepath.Join(job.Workdir, job.DatasetDir, "yolo", job.DatasetName)
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return os.RemoveAll(dst)
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}
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func (r *subprocessRunner) WriteTaskJson(ctx context.Context, job *TrainingJob, content string) error {
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dir := filepath.Join(job.Workdir, "tasks")
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if err := os.MkdirAll(dir, 0o755); err != nil {
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return err
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}
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return WriteFileAtomic(filepath.Join(dir, fmt.Sprintf("%d.json", job.TaskId)), []byte(content))
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}
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// ---------------- ssh 实现（异机） ----------------
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type sshRunner struct {
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mu sync.Mutex
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pids map[int64]int // taskId → 远程 pid
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}
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// dial 建立 SSH 连接（凭据直读 config.yml training.ssh：privateKeyPath 与 password 二选一）
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func (r *sshRunner) dial(ctx context.Context) (*ssh.Client, error) {
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host := g.Cfg().MustGet(ctx, "training.ssh.host").String()
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if host == "" {
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return nil, gerror.New("training.ssh 未配置 host")
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}
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user := g.Cfg().MustGet(ctx, "training.ssh.user").String()
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port := g.Cfg().MustGet(ctx, "training.ssh.port", 22).Int()
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password := g.Cfg().MustGet(ctx, "training.ssh.password").String()
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keyPath := g.Cfg().MustGet(ctx, "training.ssh.privateKeyPath").String()
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cfg := &ssh.ClientConfig{
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User: user,
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HostKeyCallback: ssh.InsecureIgnoreHostKey(), // 内网训练机，信任首次连接
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Timeout: 15e9,
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}
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if keyPath != "" {
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data, err := os.ReadFile(keyPath)
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if err != nil {
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return nil, gerror.Wrap(err, "读取 SSH 私钥失败")
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}
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signer, err := ssh.ParsePrivateKey(data)
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if err != nil {
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return nil, gerror.Wrap(err, "解析 SSH 私钥失败")
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}
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cfg.Auth = []ssh.AuthMethod{ssh.PublicKeys(signer)}
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} else if password != "" {
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cfg.Auth = []ssh.AuthMethod{ssh.Password(password)}
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} else {
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return nil, gerror.New("training.ssh 未配置认证方式（私钥或密码）")
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}
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return ssh.Dial("tcp", fmt.Sprintf("%s:%d", host, port), cfg)
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}
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// runCmd 远程执行单条命令，返回 stdout
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func (r *sshRunner) runCmd(ctx context.Context, job *TrainingJob, cmd string) (string, error) {
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client, err := r.dial(ctx)
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if err != nil {
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return "", err
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}
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defer func() { _ = client.Close() }()
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session, err := client.NewSession()
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if err != nil {
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return "", err
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}
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defer func() { _ = session.Close() }()
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var buf bytes.Buffer
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session.Stdout = &buf
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session.Stderr = &buf
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if err := session.Run(cmd); err != nil {
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return "", gerror.Wrapf(err, "远程命令失败: %s", cmd)
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}
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return buf.String(), nil
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}
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func (r *sshRunner) Start(ctx context.Context, job *TrainingJob) (int, error) {
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taskJson := filepath.Join(job.Workdir, "tasks", fmt.Sprintf("%d.json", job.TaskId))
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// logs/ 由 bash 重定向所需，须先建（train_server.py 只建 jsonl/结果/产物的父目录）
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cmd := fmt.Sprintf("cd %s && mkdir -p logs && nohup %s train_server.py --task-json %s > logs/%d.stdout 2>&1 & echo $!",
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job.Workdir, job.Python, taskJson, job.TaskId)
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out, err := r.runCmd(ctx, job, cmd)
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if err != nil {
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return 0, err
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}
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pid, err := strconv.Atoi(strings.TrimSpace(out))
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if err != nil {
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return 0, gerror.New("SSH 启动未返回 pid: " + out)
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}
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r.mu.Lock()
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if r.pids == nil {
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r.pids = map[int64]int{}
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}
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r.pids[job.TaskId] = pid
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r.mu.Unlock()
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return pid, nil
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}
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func (r *sshRunner) IsAlive(ctx context.Context, job *TrainingJob) (bool, error) {
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r.mu.Lock()
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pid := r.pids[job.TaskId]
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r.mu.Unlock()
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if pid == 0 {
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return false, nil
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}
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out, err := r.runCmd(ctx, job, fmt.Sprintf("kill -0 %d 2>/dev/null && echo alive || echo dead", pid))
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if err != nil {
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return false, err // 连接故障 = 状态未知，交上层处理，不吞错
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}
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return strings.TrimSpace(out) == "alive", nil
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}
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func (r *sshRunner) Cancel(ctx context.Context, job *TrainingJob) error {
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r.mu.Lock()
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pid := r.pids[job.TaskId]
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r.mu.Unlock()
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if pid == 0 {
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return nil
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}
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_, err := r.runCmd(ctx, job, fmt.Sprintf("kill -9 %d 2>/dev/null; pkill -9 -P %d 2>/dev/null; true", pid, pid))
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return err
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}
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func (r *sshRunner) FetchLogTail(ctx context.Context, job *TrainingJob) (string, error) {
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return r.runCmd(ctx, job, fmt.Sprintf("tail -c 8192 %s/logs/%d.jsonl", job.Workdir, job.TaskId))
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}
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func (r *sshRunner) FetchResult(ctx context.Context, job *TrainingJob) (string, error) {
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// if -f 区分「结果文件未就绪」（("", nil)）与 SSH 连接/命令真实失败（("", err)）：
|
||
// 原 cat 2>/dev/null 两者混为一谈，连接故障会被当成"文件不存在=仍在跑"而吞掉错误
|
||
path := filepath.Join(job.Workdir, "results", fmt.Sprintf("%d.json", job.TaskId))
|
||
out, err := r.runCmd(ctx, job, fmt.Sprintf("if [ -f %s ]; then cat %s; else echo __NO_RESULT__; fi", path, path))
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
if strings.TrimSpace(out) == "__NO_RESULT__" {
|
||
return "", nil
|
||
}
|
||
return out, nil
|
||
}
|
||
|
||
func (r *sshRunner) FetchArtifact(ctx context.Context, job *TrainingJob, remoteName, localPath string) error {
|
||
client, err := r.dial(ctx)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = client.Close() }()
|
||
session, err := client.NewSession()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = session.Close() }()
|
||
src := filepath.Join(job.Workdir, filepath.FromSlash(remoteName))
|
||
data, err := session.Output(fmt.Sprintf("cat %s", src))
|
||
if err != nil {
|
||
return gerror.Wrap(err, "拉取训练机产物失败")
|
||
}
|
||
return WriteFileAtomic(localPath, data)
|
||
}
|
||
|
||
func (r *sshRunner) PushArtifact(ctx context.Context, job *TrainingJob, remoteName, localPath string) error {
|
||
client, err := r.dial(ctx)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = client.Close() }()
|
||
session, err := client.NewSession()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = session.Close() }()
|
||
dst := filepath.Join(job.Workdir, filepath.FromSlash(remoteName))
|
||
cmd := fmt.Sprintf("mkdir -p %s && cat > %s", filepath.Dir(dst), dst)
|
||
f, err := os.Open(localPath)
|
||
if err != nil {
|
||
return gerror.Wrap(err, "读取待推送文件失败")
|
||
}
|
||
defer func() { _ = f.Close() }()
|
||
session.Stdin = f
|
||
return session.Run(cmd)
|
||
}
|
||
|
||
func (r *sshRunner) SyncYoloDataset(ctx context.Context, job *TrainingJob, pkg *YoloPackage) error {
|
||
// tar 流式管道：原图直接读数据集目录打包，stdin 推远端解包，本地不落盘
|
||
client, err := r.dial(ctx)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = client.Close() }()
|
||
session, err := client.NewSession()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = session.Close() }()
|
||
parent := fmt.Sprintf("%s/%s", job.Workdir, job.DatasetDir)
|
||
dst := fmt.Sprintf("%s/%s/yolo/%s", job.Workdir, job.DatasetDir, job.DatasetName)
|
||
// tar 解包到 parent，条目前缀 yolo/<name>/ 即落到 dst
|
||
cmd := fmt.Sprintf("mkdir -p %s && rm -rf %s && tar -xf - -C %s", parent, dst, parent)
|
||
pr, pw := io.Pipe()
|
||
session.Stdin = pr
|
||
tarErr := make(chan error, 1)
|
||
go func() {
|
||
defer pw.Close() // 失败路径也必须关管道，否则远端 tar 等不到 EOF
|
||
tarErr <- writeYoloTar(pw, job.DatasetName, pkg)
|
||
}()
|
||
runErr := session.Run(cmd)
|
||
_ = pr.Close()
|
||
if werr := <-tarErr; werr != nil {
|
||
return werr
|
||
}
|
||
if runErr != nil {
|
||
return gerror.Wrap(runErr, "tar 同步数据集失败")
|
||
}
|
||
return nil
|
||
}
|
||
|
||
// writeYoloTar 把训练集包写入 tar 流（条目前缀 yolo/<name>/，供远端 tar -xf 解包）
|
||
func writeYoloTar(w io.Writer, datasetName string, pkg *YoloPackage) error {
|
||
tw := tar.NewWriter(w)
|
||
for _, f := range pkg.Files {
|
||
data := f.Content
|
||
if f.ImagePath != "" {
|
||
imgData, rErr := os.ReadFile(f.ImagePath)
|
||
if rErr != nil {
|
||
return gerror.Wrapf(rErr, "读取原图失败: %s", f.ImagePath)
|
||
}
|
||
data = imgData
|
||
}
|
||
hdr := &tar.Header{
|
||
Name: filepath.ToSlash(filepath.Join("yolo", datasetName, f.Name)),
|
||
Mode: 0o644,
|
||
Size: int64(len(data)),
|
||
}
|
||
if err := tw.WriteHeader(hdr); err != nil {
|
||
return gerror.Wrap(err, "写 tar 头失败")
|
||
}
|
||
if _, err := tw.Write(data); err != nil {
|
||
return gerror.Wrap(err, "写 tar 内容失败")
|
||
}
|
||
}
|
||
if err := tw.Close(); err != nil {
|
||
return gerror.Wrap(err, "关闭 tar 流失败")
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func (r *sshRunner) CleanupYoloDataset(ctx context.Context, job *TrainingJob) error {
|
||
dst := fmt.Sprintf("%s/%s/yolo/%s", job.Workdir, job.DatasetDir, job.DatasetName)
|
||
_, err := r.runCmd(ctx, job, fmt.Sprintf("rm -rf %s", dst))
|
||
return err
|
||
}
|
||
|
||
func (r *sshRunner) WriteTaskJson(ctx context.Context, job *TrainingJob, content string) error {
|
||
// 通过 ssh stdin 管道写文件（避免命令行转义地狱）
|
||
client, err := r.dial(ctx)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = client.Close() }()
|
||
session, err := client.NewSession()
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer func() { _ = session.Close() }()
|
||
dir := filepath.Join(job.Workdir, "tasks")
|
||
path := filepath.Join(dir, fmt.Sprintf("%d.json", job.TaskId))
|
||
cmd := fmt.Sprintf("mkdir -p %s && cat > %s", dir, path)
|
||
session.Stdin = strings.NewReader(content)
|
||
return session.Run(cmd)
|
||
}
|
||
|
||
// ---------------- 文件工具 ----------------
|
||
|
||
// atomicWriteFile tmp + rename 原子写（避免中断产生半截文件）
|
||
func WriteFileAtomic(path string, data []byte) error {
|
||
dir := filepath.Dir(path)
|
||
if err := os.MkdirAll(dir, 0o755); err != nil {
|
||
return err
|
||
}
|
||
tmp := path + ".tmp"
|
||
if err := os.WriteFile(tmp, data, 0o644); err != nil {
|
||
return err
|
||
}
|
||
return os.Rename(tmp, path)
|
||
}
|
||
|
||
// tailFile 读文件末尾最多 maxBytes 字节
|
||
func tailFile(path string, maxBytes int64) (string, error) {
|
||
f, err := os.Open(path)
|
||
if err != nil {
|
||
if os.IsNotExist(err) {
|
||
return "", nil
|
||
}
|
||
return "", err
|
||
}
|
||
defer func() { _ = f.Close() }()
|
||
st, err := f.Stat()
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
start := st.Size() - maxBytes
|
||
if start < 0 {
|
||
start = 0
|
||
}
|
||
buf := make([]byte, st.Size()-start)
|
||
if _, err := f.ReadAt(buf, start); err != nil && err != io.EOF {
|
||
return "", err
|
||
}
|
||
return string(buf), nil
|
||
}
|