delay

concurrent/delay_queue/delay_queue.go

@@ -0,0 +1,75 @@
+package delayqueue
+
+import (
+	"context"
+	"time"
+
+	"github.com/charlienet/go-mixed/locker"
+)
+
+type store[T Delayed] interface {
+	Push(context.Context, T) error
+	Pop() (T, error)
+	Peek() (T, bool)
+	IsEmpty() bool // 队列是否为空
+}
+
+type delayQueue[T Delayed] struct {
+	mu    locker.RWLocker
+	store store[T]
+}
+
+type Delayed interface {
+	Delay() time.Time
+}
+
+func New[T Delayed]() *delayQueue[T] {
+	return &delayQueue[T]{
+		mu:    locker.NewRWLocker(),
+		store: newMemStore[T](),
+	}
+}
+
+func (q *delayQueue[T]) UseStore(s store[T]) *delayQueue[T] {
+	q.store = s
+	return q
+}
+
+func (q *delayQueue[T]) Push(task T) error {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	return q.store.Push(context.Background(), task)
+}
+
+func (q *delayQueue[T]) Peek() (T, bool) {
+	q.mu.RLock()
+	defer q.mu.RUnlock()
+
+	return q.store.Peek()
+}
+
+func (q *delayQueue[T]) Pop() (T, error) {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	return q.store.Pop()
+}
+
+func (q *delayQueue[T]) Channel(size int) <-chan T {
+	out := make(chan T, size)
+	go func() {
+		for {
+			entry, _ := q.Pop()
+			out <- entry
+		}
+	}()
+	return out
+}
+
+func (q *delayQueue[T]) IsEmpty() bool {
+	q.mu.RLock()
+	defer q.mu.RUnlock()
+
+	return q.store.IsEmpty()
+}