forked from vmihailenco/taskq
/
queue.go
188 lines (148 loc) · 3.56 KB
/
queue.go
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package memqueue
import (
"errors"
"fmt"
"sync"
"time"
"github.com/go-msgqueue/msgqueue"
"github.com/go-msgqueue/msgqueue/internal"
)
type manager struct{}
var _ msgqueue.Manager = (*manager)(nil)
func (manager) NewQueue(opt *msgqueue.Options) msgqueue.Queue {
return NewQueue(opt)
}
func (manager) Queues() []msgqueue.Queue {
var queues []msgqueue.Queue
for _, q := range Queues() {
queues = append(queues, q)
}
return queues
}
func NewManager() msgqueue.Manager {
return manager{}
}
type Queue struct {
opt *msgqueue.Options
sync bool
noDelay bool
wg sync.WaitGroup
p *msgqueue.Processor
}
var _ msgqueue.Queue = (*Queue)(nil)
func NewQueue(opt *msgqueue.Options) *Queue {
opt.Init()
q := Queue{
opt: opt,
}
q.p = msgqueue.NewProcessor(&q, opt)
if err := q.p.Start(); err != nil {
panic(err)
}
registerQueue(&q)
return &q
}
func (q *Queue) Name() string {
return q.opt.Name
}
func (q *Queue) String() string {
return fmt.Sprintf("Memqueue<Name=%s>", q.Name())
}
func (q *Queue) Options() *msgqueue.Options {
return q.opt
}
func (q *Queue) Processor() *msgqueue.Processor {
return q.p
}
func (q *Queue) SetSync(sync bool) {
q.sync = sync
}
func (q *Queue) SetNoDelay(noDelay bool) {
q.noDelay = noDelay
}
// Close is CloseTimeout with 30 seconds timeout.
func (q *Queue) Close() error {
return q.CloseTimeout(30 * time.Second)
}
// Close closes the queue waiting for pending messages to be processed.
func (q *Queue) CloseTimeout(timeout time.Duration) error {
defer unregisterQueue(q)
done := make(chan struct{}, 1)
timeoutCh := time.After(timeout)
go func() {
q.wg.Wait()
done <- struct{}{}
}()
select {
case <-done:
case <-timeoutCh:
return fmt.Errorf("message are not processed after %s", timeout)
}
return q.p.StopTimeout(timeout)
}
// Call creates a message using the args and adds it to the queue.
func (q *Queue) Call(args ...interface{}) error {
msg := msgqueue.NewMessage(args...)
return q.Add(msg)
}
// CallOnce works like Call, but it returns ErrDuplicate if message
// with such args was already added in a period.
func (q *Queue) CallOnce(period time.Duration, args ...interface{}) error {
msg := msgqueue.NewMessage(args...)
msg.SetDelayName(period, args...)
return q.Add(msg)
}
// Add adds message to the queue.
func (q *Queue) Add(msg *msgqueue.Message) error {
if !q.isUniqueName(msg.Name) {
return msgqueue.ErrDuplicate
}
q.wg.Add(1)
return q.enqueueMessage(msg)
}
func (q *Queue) Len() (int, error) {
return q.Processor().Len(), nil
}
func (q *Queue) enqueueMessage(msg *msgqueue.Message) error {
if (q.noDelay || q.sync) && msg.Delay > 0 {
msg.Delay = 0
}
msg.ReservedCount++
if q.sync {
return q.p.Process(msg)
}
return q.p.Add(msg)
}
func (q *Queue) isUniqueName(name string) bool {
const redisPrefix = "memqueue"
if name == "" {
return true
}
key := fmt.Sprintf("%s:%s:%s", redisPrefix, q.opt.GroupName, name)
exists := q.opt.Storage.Exists(key)
return !exists
}
func (q *Queue) ReserveN(n int, reservationTimeout time.Duration, waitTimeout time.Duration) ([]*msgqueue.Message, error) {
return nil, internal.ErrNotSupported
}
func (q *Queue) Release(msg *msgqueue.Message) error {
return q.enqueueMessage(msg)
}
func (q *Queue) Delete(msg *msgqueue.Message) error {
q.wg.Done()
return nil
}
func (q *Queue) DeleteBatch(msgs []*msgqueue.Message) error {
if len(msgs) == 0 {
return errors.New("msgqueue: no messages to delete")
}
for _, msg := range msgs {
if err := q.Delete(msg); err != nil {
return err
}
}
return nil
}
func (q *Queue) Purge() error {
return q.p.Purge()
}