105 lines
1.8 KiB
Go
105 lines
1.8 KiB
Go
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package service
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import (
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"context"
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"sync"
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"gen2d/internal/logger"
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)
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// TaskJob 队列中的任务。
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type TaskJob struct {
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Ctx context.Context
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ProjectID string
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TaskID string
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Execute func(ctx context.Context) error
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}
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// TaskQueue 串行 FIFO 任务队列。
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type TaskQueue struct {
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mu sync.Mutex
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jobs []*TaskJob
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ready chan struct{}
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stop chan struct{}
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stopped bool
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}
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// NewTaskQueue 创建任务队列并启动调度协程。
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func NewTaskQueue() *TaskQueue {
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q := &TaskQueue{
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jobs: make([]*TaskJob, 0),
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ready: make(chan struct{}, 1),
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stop: make(chan struct{}),
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}
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go q.run()
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return q
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}
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// Enqueue 将任务加入队尾，返回队列中的位置（1-based）。
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func (q *TaskQueue) Enqueue(job *TaskJob) int {
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q.mu.Lock()
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defer q.mu.Unlock()
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q.jobs = append(q.jobs, job)
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pos := len(q.jobs)
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select {
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case q.ready <- struct{}{}:
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default:
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}
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return pos
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}
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// QueueLen 返回当前队列长度。
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func (q *TaskQueue) QueueLen() int {
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q.mu.Lock()
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defer q.mu.Unlock()
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return len(q.jobs)
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}
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// Stop 优雅关闭队列。
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func (q *TaskQueue) Stop() {
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q.mu.Lock()
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defer q.mu.Unlock()
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if !q.stopped {
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q.stopped = true
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close(q.stop)
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}
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}
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func (q *TaskQueue) run() {
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for {
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select {
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case <-q.stop:
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return
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case <-q.ready:
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q.processNext()
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}
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}
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}
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func (q *TaskQueue) processNext() {
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q.mu.Lock()
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if len(q.jobs) == 0 {
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q.mu.Unlock()
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return
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}
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job := q.jobs[0]
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q.jobs = q.jobs[1:]
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// 如果队列还有任务，重新发信号
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if len(q.jobs) > 0 {
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select {
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case q.ready <- struct{}{}:
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default:
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}
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}
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q.mu.Unlock()
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l := logger.With("task_id", job.TaskID, "project_id", job.ProjectID)
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l.Info("task queue executing job", "queue_remaining", len(q.jobs))
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if err := job.Execute(job.Ctx); err != nil {
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l.Error("task job failed", "error", err)
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} else {
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l.Info("task job completed")
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}
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}
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