refactor: improve queues#1453
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LinkinStars merged 2 commits intoapache:devfrom Jan 14, 2026
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ferhatelmas
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Dec 9, 2025
ferhatelmas
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- fix race condition for registering handler
- add close method
- use generics to reduce duplication
- rename packages to drop underscore for go convention
- rename interface to drop stutter with package name
* fix race condition for registering handler * add close method * use generics to reduce duplication * rename packages to drop underscore for go convention * rename interface to drop stutter with package name Signed-off-by: ferhat elmas <elmas.ferhat@gmail.com>
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Dec 12, 2025
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| func (q *Queue[T]) Send(ctx context.Context, msg T) { | ||
| q.mu.RLock() | ||
| closed := q.closed | ||
| q.mu.RUnlock() | ||
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| if closed { | ||
| log.Warnf("[%s] queue is closed, dropping message", q.name) | ||
| return | ||
| } | ||
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| select { | ||
| case q.queue <- msg: | ||
| log.Debugf("[%s] enqueued message: %+v", q.name, msg) | ||
| case <-ctx.Done(): | ||
| log.Warnf("[%s] context cancelled while sending message", q.name) | ||
| } | ||
| } |
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This function may have a small issue. After determining the closed state, it immediately unlocks the channel and sends a message. If the channel is closed after unlocking, sending the message may result in a “send on closed channel” error.
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yes, good catch. Updated deferring to release the lock
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| type Service = *queue.Queue[*schema.ActivityMsg] | ||
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| func NewService() Service { | ||
| return queue.New[*schema.ActivityMsg]("activity", 128) | ||
| } |
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We believe defining an interface would be more user-friendly. Such as
type Service interface {
Send(ctx context.Context, msg *schema.ActivityMsg)
RegisterHandler(handler func(ctx context.Context, msg *schema.ActivityMsg) error)
Close()
}
func NewService() Service {
return queue.New[*schema.ActivityMsg]("activity", 128)
}
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Put interface parametric into queue package and aliased it into specific packages for code reuse. For example, following how it will be seen while using:
type Service queue.Service[*schema.NotificationMsg]
func (queue.Service[*schema.NotificationMsg]) Close()
func (queue.Service[*schema.NotificationMsg]) RegisterHandler(handler func(ctx context.Context, msg *schema.NotificationMsg) error)
func (queue.Service[*schema.NotificationMsg]) Send(ctx context.Context, msg *schema.NotificationMsg)Signed-off-by: ferhat elmas <elmas.ferhat@gmail.com>
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