mirror of https://github.com/go-gitea/gitea.git
124 lines
2.2 KiB
Go
124 lines
2.2 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package queue
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"sync"
|
|
"time"
|
|
|
|
"code.gitea.io/gitea/modules/container"
|
|
)
|
|
|
|
var errChannelClosed = errors.New("channel is closed")
|
|
|
|
type baseChannel struct {
|
|
c chan []byte
|
|
set container.Set[string]
|
|
mu sync.Mutex
|
|
|
|
isUnique bool
|
|
}
|
|
|
|
var _ baseQueue = (*baseChannel)(nil)
|
|
|
|
func newBaseChannelGeneric(cfg *BaseConfig, unique bool) (baseQueue, error) {
|
|
q := &baseChannel{c: make(chan []byte, cfg.Length), isUnique: unique}
|
|
if unique {
|
|
q.set = container.Set[string]{}
|
|
}
|
|
return q, nil
|
|
}
|
|
|
|
func newBaseChannelSimple(cfg *BaseConfig) (baseQueue, error) {
|
|
return newBaseChannelGeneric(cfg, false)
|
|
}
|
|
|
|
func newBaseChannelUnique(cfg *BaseConfig) (baseQueue, error) {
|
|
return newBaseChannelGeneric(cfg, true)
|
|
}
|
|
|
|
func (q *baseChannel) PushItem(ctx context.Context, data []byte) error {
|
|
if q.c == nil {
|
|
return errChannelClosed
|
|
}
|
|
|
|
if q.isUnique {
|
|
q.mu.Lock()
|
|
has := q.set.Contains(string(data))
|
|
q.mu.Unlock()
|
|
if has {
|
|
return ErrAlreadyInQueue
|
|
}
|
|
}
|
|
|
|
select {
|
|
case q.c <- data:
|
|
if q.isUnique {
|
|
q.mu.Lock()
|
|
q.set.Add(string(data))
|
|
q.mu.Unlock()
|
|
}
|
|
return nil
|
|
case <-time.After(pushBlockTime):
|
|
return context.DeadlineExceeded
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
}
|
|
}
|
|
|
|
func (q *baseChannel) PopItem(ctx context.Context) ([]byte, error) {
|
|
select {
|
|
case data, ok := <-q.c:
|
|
if !ok {
|
|
return nil, errChannelClosed
|
|
}
|
|
q.mu.Lock()
|
|
q.set.Remove(string(data))
|
|
q.mu.Unlock()
|
|
return data, nil
|
|
case <-ctx.Done():
|
|
return nil, ctx.Err()
|
|
}
|
|
}
|
|
|
|
func (q *baseChannel) HasItem(ctx context.Context, data []byte) (bool, error) {
|
|
q.mu.Lock()
|
|
defer q.mu.Unlock()
|
|
|
|
return q.set.Contains(string(data)), nil
|
|
}
|
|
|
|
func (q *baseChannel) Len(ctx context.Context) (int, error) {
|
|
q.mu.Lock()
|
|
defer q.mu.Unlock()
|
|
|
|
if q.c == nil {
|
|
return 0, errChannelClosed
|
|
}
|
|
|
|
return len(q.c), nil
|
|
}
|
|
|
|
func (q *baseChannel) Close() error {
|
|
q.mu.Lock()
|
|
defer q.mu.Unlock()
|
|
|
|
close(q.c)
|
|
q.set = container.Set[string]{}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (q *baseChannel) RemoveAll(ctx context.Context) error {
|
|
q.mu.Lock()
|
|
defer q.mu.Unlock()
|
|
|
|
for q.c != nil && len(q.c) > 0 {
|
|
<-q.c
|
|
}
|
|
return nil
|
|
}
|