Delete internal directory

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公明
2026-08-18 20:14:29 +08:00
committed by GitHub
parent 910d07ea0a
commit 55ee5fbac9
589 changed files with 0 additions and 136501 deletions
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package c2
import (
"sync"
"sync/atomic"
"time"
)
// Event 是 EventBus 内部传输的事件单元,是 database.C2Event 的"实时投影"。
// 区别在于:
// - 数据库表保存全部历史,用于审计与列表分页;
// - EventBus 只缓存最近 N 条,用于 SSE/WS 实时推送给在线订阅者。
type Event struct {
ID string `json:"id"`
Level string `json:"level"`
Category string `json:"category"`
SessionID string `json:"sessionId,omitempty"`
TaskID string `json:"taskId,omitempty"`
Message string `json:"message"`
Data map[string]interface{} `json:"data,omitempty"`
CreatedAt time.Time `json:"createdAt"`
}
// EventBus 简单的内存广播总线。
// 设计要点:
// - 多订阅者:每个订阅者有独立 buffered channel,慢消费者不会阻塞 publisher;
// - 容量满即丢弃:发布端绝不阻塞,避免 listener accept loop / beacon handler 卡住;
// - 全局过滤:订阅时可限定 SessionID/Category,前端按需订阅,省 CPU;
// - 关闭安全:Close() 后所有订阅者 chan 关闭,防止 goroutine 泄漏。
type EventBus struct {
mu sync.RWMutex
subscribers map[string]*Subscription
closed bool
}
// Subscription 订阅句柄
type Subscription struct {
ID string
Ch chan *Event
SessionID string // 空表示不限制
Category string // 空表示不限制
Levels map[string]struct{}
dropCount atomic.Int64
}
// NewEventBus 创建总线
func NewEventBus() *EventBus {
return &EventBus{subscribers: make(map[string]*Subscription)}
}
// Subscribe 注册订阅者;返回 Subscription,调用方负责后续 Unsubscribe。
// - bufferSize:单订阅者 channel 容量,建议 64~256
// - sessionFilter / categoryFilter:空字符串=不限;
// - levelFilter[]string{"warn","critical"} 这类,nil/空表示全收。
func (b *EventBus) Subscribe(id string, bufferSize int, sessionFilter, categoryFilter string, levelFilter []string) *Subscription {
if bufferSize <= 0 {
bufferSize = 128
}
sub := &Subscription{
ID: id,
Ch: make(chan *Event, bufferSize),
SessionID: sessionFilter,
Category: categoryFilter,
}
if len(levelFilter) > 0 {
sub.Levels = make(map[string]struct{}, len(levelFilter))
for _, l := range levelFilter {
sub.Levels[l] = struct{}{}
}
}
b.mu.Lock()
defer b.mu.Unlock()
if b.closed {
close(sub.Ch)
return sub
}
b.subscribers[id] = sub
return sub
}
// Unsubscribe 注销订阅者并关闭 channel
func (b *EventBus) Unsubscribe(id string) {
b.mu.Lock()
defer b.mu.Unlock()
if sub, ok := b.subscribers[id]; ok {
delete(b.subscribers, id)
close(sub.Ch)
}
}
// Publish 广播事件给所有订阅者;非阻塞,channel 满时静默丢弃
func (b *EventBus) Publish(e *Event) {
if e == nil {
return
}
b.mu.RLock()
subs := make([]*Subscription, 0, len(b.subscribers))
for _, s := range b.subscribers {
if s.matches(e) {
subs = append(subs, s)
}
}
closed := b.closed
b.mu.RUnlock()
if closed {
return
}
for _, s := range subs {
select {
case s.Ch <- e:
default:
s.dropCount.Add(1)
}
}
}
// Close 关闭总线,停止所有订阅
func (b *EventBus) Close() {
b.mu.Lock()
defer b.mu.Unlock()
if b.closed {
return
}
b.closed = true
for id, s := range b.subscribers {
close(s.Ch)
delete(b.subscribers, id)
}
}
func (s *Subscription) matches(e *Event) bool {
if s.SessionID != "" && e.SessionID != s.SessionID {
return false
}
if s.Category != "" && e.Category != s.Category {
return false
}
if len(s.Levels) > 0 {
if _, ok := s.Levels[e.Level]; !ok {
return false
}
}
return true
}