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Delete handler directory
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公明
@@ -1,276 +0,0 @@
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package handler
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import (
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"context"
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"errors"
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"sync"
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"time"
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)
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// ErrTaskCancelled 用户取消任务的错误
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var ErrTaskCancelled = errors.New("agent task cancelled by user")
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// ErrTaskAlreadyRunning 会话已有任务正在执行
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var ErrTaskAlreadyRunning = errors.New("agent task already running for conversation")
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// AgentTask 描述正在运行的Agent任务
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type AgentTask struct {
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ConversationID string `json:"conversationId"`
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Message string `json:"message,omitempty"`
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StartedAt time.Time `json:"startedAt"`
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Status string `json:"status"`
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CancellingAt time.Time `json:"-"` // 进入 cancelling 状态的时间，用于清理长时间卡住的任务
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cancel func(error)
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}
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// CompletedTask 已完成的任务（用于历史记录）
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type CompletedTask struct {
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ConversationID string `json:"conversationId"`
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Message string `json:"message,omitempty"`
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StartedAt time.Time `json:"startedAt"`
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CompletedAt time.Time `json:"completedAt"`
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Status string `json:"status"`
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}
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// AgentTaskManager 管理正在运行的Agent任务
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type AgentTaskManager struct {
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mu sync.RWMutex
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tasks map[string]*AgentTask
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completedTasks []*CompletedTask // 最近完成的任务历史
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maxHistorySize int // 最大历史记录数
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historyRetention time.Duration // 历史记录保留时间
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}
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const (
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// cancellingStuckThreshold 处于「取消中」超过此时长则强制从运行列表移除。正常取消会在当前步骤内返回，
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// 超过则视为卡住，尽快释放会话。常见做法多为 30–60s 内释放。
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cancellingStuckThreshold = 45 * time.Second
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// cancellingStuckThresholdLegacy 未记录 CancellingAt 时用 StartedAt 判断的兜底时长
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cancellingStuckThresholdLegacy = 2 * time.Minute
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cleanupInterval = 15 * time.Second // 与上面阈值配合，最长约 60s 内移除
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)
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// NewAgentTaskManager 创建任务管理器
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func NewAgentTaskManager() *AgentTaskManager {
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m := &AgentTaskManager{
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tasks: make(map[string]*AgentTask),
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completedTasks: make([]*CompletedTask, 0),
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maxHistorySize: 50, // 最多保留50条历史记录
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historyRetention: 24 * time.Hour, // 保留24小时
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}
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go m.runStuckCancellingCleanup()
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return m
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}
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// runStuckCancellingCleanup 定期将长时间处于「取消中」的任务强制结束，避免卡住无法发新消息
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func (m *AgentTaskManager) runStuckCancellingCleanup() {
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ticker := time.NewTicker(cleanupInterval)
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defer ticker.Stop()
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for range ticker.C {
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m.cleanupStuckCancelling()
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}
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}
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func (m *AgentTaskManager) cleanupStuckCancelling() {
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m.mu.Lock()
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var toFinish []string
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now := time.Now()
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for id, task := range m.tasks {
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if task.Status != "cancelling" {
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continue
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}
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var elapsed time.Duration
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if !task.CancellingAt.IsZero() {
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elapsed = now.Sub(task.CancellingAt)
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if elapsed < cancellingStuckThreshold {
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continue
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}
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} else {
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elapsed = now.Sub(task.StartedAt)
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if elapsed < cancellingStuckThresholdLegacy {
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continue
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}
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}
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toFinish = append(toFinish, id)
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}
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m.mu.Unlock()
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for _, id := range toFinish {
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m.FinishTask(id, "cancelled")
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}
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}
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// StartTask 注册并开始一个新的任务
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func (m *AgentTaskManager) StartTask(conversationID, message string, cancel context.CancelCauseFunc) (*AgentTask, error) {
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m.mu.Lock()
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defer m.mu.Unlock()
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if _, exists := m.tasks[conversationID]; exists {
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return nil, ErrTaskAlreadyRunning
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}
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task := &AgentTask{
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ConversationID: conversationID,
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Message: message,
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StartedAt: time.Now(),
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Status: "running",
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cancel: func(err error) {
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if cancel != nil {
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cancel(err)
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}
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},
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}
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m.tasks[conversationID] = task
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return task, nil
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}
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// CancelTask 取消指定会话的任务。若任务已在取消中，仍返回 (true, nil) 以便接口幂等、前端不报错。
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func (m *AgentTaskManager) CancelTask(conversationID string, cause error) (bool, error) {
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m.mu.Lock()
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task, exists := m.tasks[conversationID]
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if !exists {
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m.mu.Unlock()
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return false, nil
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}
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// 如果已经处于取消流程，视为成功（幂等），避免前端重复点击报「未找到任务」
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if task.Status == "cancelling" {
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m.mu.Unlock()
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return true, nil
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}
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task.Status = "cancelling"
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task.CancellingAt = time.Now()
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cancel := task.cancel
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m.mu.Unlock()
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if cause == nil {
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cause = ErrTaskCancelled
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}
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if cancel != nil {
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cancel(cause)
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}
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return true, nil
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}
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// UpdateTaskStatus 更新任务状态但不删除任务（用于在发送事件前更新状态）
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func (m *AgentTaskManager) UpdateTaskStatus(conversationID string, status string) {
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m.mu.Lock()
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defer m.mu.Unlock()
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task, exists := m.tasks[conversationID]
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if !exists {
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return
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}
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if status != "" {
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task.Status = status
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}
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}
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// FinishTask 完成任务并从管理器中移除
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func (m *AgentTaskManager) FinishTask(conversationID string, finalStatus string) {
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m.mu.Lock()
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defer m.mu.Unlock()
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task, exists := m.tasks[conversationID]
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if !exists {
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return
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}
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if finalStatus != "" {
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task.Status = finalStatus
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}
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// 保存到历史记录
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completedTask := &CompletedTask{
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ConversationID: task.ConversationID,
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Message: task.Message,
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StartedAt: task.StartedAt,
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CompletedAt: time.Now(),
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Status: finalStatus,
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}
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// 添加到历史记录
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m.completedTasks = append(m.completedTasks, completedTask)
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// 清理过期和过多的历史记录
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m.cleanupHistory()
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// 从运行任务中移除
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delete(m.tasks, conversationID)
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}
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// cleanupHistory 清理过期的历史记录
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func (m *AgentTaskManager) cleanupHistory() {
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now := time.Now()
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cutoffTime := now.Add(-m.historyRetention)
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// 过滤掉过期的记录
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validTasks := make([]*CompletedTask, 0, len(m.completedTasks))
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for _, task := range m.completedTasks {
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if task.CompletedAt.After(cutoffTime) {
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validTasks = append(validTasks, task)
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}
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}
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// 如果仍然超过最大数量，只保留最新的
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if len(validTasks) > m.maxHistorySize {
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// 按完成时间排序，保留最新的
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// 由于是追加的，最新的在最后，所以直接取最后N个
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start := len(validTasks) - m.maxHistorySize
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validTasks = validTasks[start:]
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}
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m.completedTasks = validTasks
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}
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// GetActiveTasks 返回所有正在运行的任务
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func (m *AgentTaskManager) GetActiveTasks() []*AgentTask {
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m.mu.RLock()
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defer m.mu.RUnlock()
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result := make([]*AgentTask, 0, len(m.tasks))
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for _, task := range m.tasks {
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result = append(result, &AgentTask{
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ConversationID: task.ConversationID,
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Message: task.Message,
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StartedAt: task.StartedAt,
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Status: task.Status,
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})
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}
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return result
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}
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// GetCompletedTasks 返回最近完成的任务历史
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func (m *AgentTaskManager) GetCompletedTasks() []*CompletedTask {
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m.mu.RLock()
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defer m.mu.RUnlock()
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// 清理过期记录（只读锁，不影响其他操作）
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// 注意：这里不能直接调用cleanupHistory，因为需要写锁
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// 所以返回时过滤过期记录
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now := time.Now()
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cutoffTime := now.Add(-m.historyRetention)
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result := make([]*CompletedTask, 0, len(m.completedTasks))
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for _, task := range m.completedTasks {
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if task.CompletedAt.After(cutoffTime) {
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result = append(result, task)
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}
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}
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// 按完成时间倒序排序（最新的在前）
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// 由于是追加的，最新的在最后，需要反转
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for i, j := 0, len(result)-1; i < j; i, j = i+1, j-1 {
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result[i], result[j] = result[j], result[i]
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}
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// 限制返回数量
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if len(result) > m.maxHistorySize {
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result = result[:m.maxHistorySize]
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}
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return result
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}
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