后端: 1.获取agent聊天历史记录接口做了如下更改: (1)对reasoning_content也做了存储,同步更改了mysql和redis缓存的读写逻辑 (2)为了承接前端的重试/修改消息的逻辑,进行了一些代码和表单上的改动 前端: 1.agent页面新增了很多小组件,改善交互体验 2.新增重试消息/修改消息并重新发送功能,前者有bug,可能前后端都有问题,待修复。
308 lines
7.5 KiB
Go
308 lines
7.5 KiB
Go
package dao
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import (
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"context"
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/cloudwego/eino/schema"
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"github.com/go-redis/redis/v8"
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)
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type AgentCache struct {
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client *redis.Client
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// 默认窗口大小(会被会话级动态窗口覆盖)
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windowSize int
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// 缓存过期时间
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expiration time.Duration
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}
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const (
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minHistoryWindowSize = 16
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maxHistoryWindowSize = 4096
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)
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func NewAgentCache(client *redis.Client) *AgentCache {
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return &AgentCache{
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client: client,
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windowSize: 128,
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expiration: 1 * time.Hour,
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}
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}
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func (m *AgentCache) historyKey(sessionID string) string {
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return fmt.Sprintf("smartflow:history:%s", sessionID)
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}
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func (m *AgentCache) historyWindowKey(sessionID string) string {
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return fmt.Sprintf("smartflow:history_window:%s", sessionID)
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}
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func (m *AgentCache) normalizeWindowSize(size int) int {
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if size < minHistoryWindowSize {
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return minHistoryWindowSize
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}
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if size > maxHistoryWindowSize {
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return maxHistoryWindowSize
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}
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return size
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}
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func (m *AgentCache) getSessionWindowSize(ctx context.Context, sessionID string) (int, error) {
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windowKey := m.historyWindowKey(sessionID)
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val, err := m.client.Get(ctx, windowKey).Result()
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if err == redis.Nil {
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return m.windowSize, nil
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}
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if err != nil {
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return 0, err
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}
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size, convErr := strconv.Atoi(val)
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if convErr != nil {
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return m.windowSize, nil
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}
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return m.normalizeWindowSize(size), nil
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}
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// SetSessionWindowSize 设置会话级窗口上限。
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func (m *AgentCache) SetSessionWindowSize(ctx context.Context, sessionID string, size int) error {
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normalized := m.normalizeWindowSize(size)
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windowKey := m.historyWindowKey(sessionID)
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return m.client.Set(ctx, windowKey, normalized, m.expiration).Err()
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}
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// EnforceHistoryWindow 按当前会话窗口强制修剪历史队列。
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func (m *AgentCache) EnforceHistoryWindow(ctx context.Context, sessionID string) error {
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size, err := m.getSessionWindowSize(ctx, sessionID)
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if err != nil {
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return err
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}
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key := m.historyKey(sessionID)
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pipe := m.client.Pipeline()
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pipe.LTrim(ctx, key, 0, int64(size-1))
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pipe.Expire(ctx, key, m.expiration)
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_, err = pipe.Exec(ctx)
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return err
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}
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func (m *AgentCache) PushMessage(ctx context.Context, sessionID string, msg *schema.Message) error {
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key := m.historyKey(sessionID)
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size, err := m.getSessionWindowSize(ctx, sessionID)
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if err != nil {
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return err
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}
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// 1. 序列化 Eino 消息。
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data, err := json.Marshal(msg)
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if err != nil {
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return fmt.Errorf("marshal message failed: %w", err)
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}
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// 2. 使用 Pipeline 保证“写入+裁剪+续期”原子执行。
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pipe := m.client.Pipeline()
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pipe.LPush(ctx, key, data)
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pipe.LTrim(ctx, key, 0, int64(size-1))
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pipe.Expire(ctx, key, m.expiration)
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_, err = pipe.Exec(ctx)
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return err
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}
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func (m *AgentCache) GetHistory(ctx context.Context, sessionID string) ([]*schema.Message, error) {
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key := m.historyKey(sessionID)
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vals, err := m.client.LRange(ctx, key, 0, -1).Result()
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if err != nil {
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return nil, err
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}
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if len(vals) == 0 {
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return nil, nil
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}
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messages := make([]*schema.Message, len(vals))
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for i, val := range vals {
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var msg schema.Message
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if err := json.Unmarshal([]byte(val), &msg); err != nil {
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return nil, err
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}
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// LRANGE 返回 [最新...最旧],这里反转成 [最旧...最新]
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messages[len(vals)-1-i] = &msg
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}
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return messages, nil
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}
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// BackfillHistory 在缓存失效时,把历史消息一次性回填到 Redis。
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func (m *AgentCache) BackfillHistory(ctx context.Context, sessionID string, messages []*schema.Message) error {
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key := m.historyKey(sessionID)
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size, err := m.getSessionWindowSize(ctx, sessionID)
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if err != nil {
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return err
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}
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if len(messages) == 0 {
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return m.client.Del(ctx, key).Err()
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}
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values := make([]interface{}, len(messages))
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for i, msg := range messages {
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data, err := json.Marshal(msg)
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if err != nil {
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return fmt.Errorf("marshal failed at index %d: %w", i, err)
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}
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values[i] = data
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}
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pipe := m.client.Pipeline()
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pipe.Del(ctx, key)
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pipe.LPush(ctx, key, values...)
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pipe.LTrim(ctx, key, 0, int64(size-1))
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pipe.Expire(ctx, key, m.expiration)
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_, err = pipe.Exec(ctx)
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return err
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}
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func (m *AgentCache) ApplyRetrySeed(ctx context.Context, sessionID, retryGroupID string, sourceUserMessageID, sourceAssistantMessageID int) error {
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if m == nil || m.client == nil {
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return nil
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}
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groupID := strings.TrimSpace(retryGroupID)
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if groupID == "" {
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return nil
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}
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vals, err := m.client.LRange(ctx, m.historyKey(sessionID), 0, -1).Result()
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if err != nil {
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return err
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}
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if len(vals) == 0 {
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return nil
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}
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changed := false
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targets := map[int]struct{}{}
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if sourceUserMessageID > 0 {
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targets[sourceUserMessageID] = struct{}{}
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}
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if sourceAssistantMessageID > 0 {
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targets[sourceAssistantMessageID] = struct{}{}
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}
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if len(targets) == 0 {
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return nil
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}
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indexOne := 1
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for idx, raw := range vals {
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var msg schema.Message
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if err := json.Unmarshal([]byte(raw), &msg); err != nil {
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return err
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}
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historyID := extractMessageHistoryID(&msg)
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if historyID <= 0 {
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continue
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}
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if _, ok := targets[historyID]; !ok {
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continue
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}
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if msg.Extra == nil {
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msg.Extra = make(map[string]any)
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}
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msg.Extra["retry_group_id"] = groupID
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msg.Extra["retry_index"] = indexOne
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updated, err := json.Marshal(&msg)
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if err != nil {
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return err
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}
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vals[idx] = string(updated)
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changed = true
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}
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if !changed {
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return nil
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}
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pipe := m.client.Pipeline()
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key := m.historyKey(sessionID)
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pipe.Del(ctx, key)
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values := make([]interface{}, 0, len(vals))
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for _, item := range vals {
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values = append(values, item)
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}
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pipe.RPush(ctx, key, values...)
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pipe.LTrim(ctx, key, 0, int64(len(vals)-1))
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pipe.Expire(ctx, key, m.expiration)
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_, err = pipe.Exec(ctx)
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return err
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}
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func (m *AgentCache) ClearHistory(ctx context.Context, sessionID string) error {
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historyKey := m.historyKey(sessionID)
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windowKey := m.historyWindowKey(sessionID)
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return m.client.Del(ctx, historyKey, windowKey).Err()
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}
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func (m *AgentCache) GetConversationStatus(ctx context.Context, sessionID string) (bool, error) {
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key := fmt.Sprintf("smartflow:conversation_status:%s", sessionID)
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n, err := m.client.Exists(ctx, key).Result()
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if err != nil {
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return false, err
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}
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return n == 1, nil
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}
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func (m *AgentCache) SetConversationStatus(ctx context.Context, sessionID string) error {
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key := fmt.Sprintf("smartflow:conversation_status:%s", sessionID)
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// 仅用于“存在性”标记:只有不存在时才写入,避免重复写。
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return m.client.SetNX(ctx, key, 1, m.expiration).Err()
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}
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func (m *AgentCache) DeleteConversationStatus(ctx context.Context, sessionID string) error {
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key := fmt.Sprintf("smartflow:conversation_status:%s", sessionID)
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return m.client.Del(ctx, key).Err()
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}
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func extractMessageHistoryID(msg *schema.Message) int {
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if msg == nil || msg.Extra == nil {
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return 0
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}
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raw, ok := msg.Extra["history_id"]
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if !ok {
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return 0
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}
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// 1. history_id 主要来自 DB 回填,正常情况下是 number。
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// 2. 但 Redis 往返、灰度期数据修复或手工写入时,仍可能出现字符串数字。
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// 3. 这里做一次宽松解析,避免重试分组补种时因为类型差异找不到源消息。
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switch v := raw.(type) {
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case int:
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return v
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case int32:
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return int(v)
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case int64:
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return int(v)
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case float64:
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return int(v)
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case json.Number:
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if parsed, err := v.Int64(); err == nil {
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return int(parsed)
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}
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if parsed, err := v.Float64(); err == nil {
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return int(parsed)
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}
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return 0
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case string:
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trimmed := strings.TrimSpace(v)
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if trimmed == "" {
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return 0
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}
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parsed, err := strconv.Atoi(trimmed)
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if err != nil {
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return 0
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}
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return parsed
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default:
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return 0
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}
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}
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