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queue.go
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queue.go
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package utils
import (
"sync"
)
type Queue struct {
lhm *LinkedHashMap
m sync.RWMutex
}
func NewQueue() *Queue {
return &Queue{
lhm: NewLinkedHashMap(),
}
}
func (q *Queue) Add(item interface{}) {
defer q.m.Unlock()
q.m.Lock()
q.lhm.PushBack(item)
}
func (q *Queue) AddWithKey(key string, item interface{}) {
defer q.m.Unlock()
q.m.Lock()
if key != "" {
q.lhm.PushBackWithCollapseKey(key, item)
} else {
q.lhm.PushBack(item)
}
}
func (q *Queue) Element() interface{} {
defer q.m.RUnlock()
q.m.RLock()
item := q.lhm.Front()
if item != nil {
return item.Value
}
return nil
}
func (q *Queue) Remove() interface{} {
defer q.m.Unlock()
q.m.Lock()
item := q.lhm.Front()
if item != nil {
return q.lhm.Remove(item)
}
return nil
}