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queue.go
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queue.go
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// Copyright 2019 Luis Guillén Civera <luisguillenc@gmail.com>. View LICENSE.
package classifyqueue
import (
"errors"
"sync"
"time"
"github.com/luids-io/api/tlsutil"
)
type processQueueFn func(*sync.WaitGroup, []*tlsutil.ConnectionData)
type queue struct {
wg *sync.WaitGroup
closed bool
reqC chan *tlsutil.ConnectionData
size int
interval time.Duration
process processQueueFn
}
func newQueue(s int, d time.Duration, p processQueueFn) *queue {
q := &queue{
wg: &sync.WaitGroup{},
size: s,
interval: d,
reqC: make(chan *tlsutil.ConnectionData, s),
process: p,
}
go q.run()
return q
}
// close queue
func (q *queue) close() error {
if q.closed {
return errors.New("classifyqueue: queue already closed")
}
q.closed = true
close(q.reqC)
q.wg.Wait()
return nil
}
// add to queue
func (q *queue) add(req *tlsutil.ConnectionData) error {
if q.closed {
return errors.New("classifyqueue: queue is closed")
}
q.reqC <- req
return nil
}
// run is the main loop
func (q *queue) run() {
buffer := make([]*tlsutil.ConnectionData, 0, q.size)
ticker := time.NewTicker(q.interval)
defer ticker.Stop()
for {
select {
case request, ok := <-q.reqC:
if !ok {
return
}
buffer = append(buffer, request)
if len(buffer) >= q.size {
//process job in goroutine
q.wg.Add(1)
go q.process(q.wg, buffer)
buffer = make([]*tlsutil.ConnectionData, 0, q.size)
}
case <-ticker.C:
if len(buffer) > 0 {
//process job in goroutine
q.wg.Add(1)
go q.process(q.wg, buffer)
buffer = make([]*tlsutil.ConnectionData, 0, q.size)
}
}
}
}