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queue

package

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Versions in this module

v1

v1.11.1

Oct 29, 2026

v1.11.0

Oct 29, 2026

v1.10.1

Oct 20, 2026

v1.10.0

Oct 19, 2026

v1.9.0

Oct 13, 2026

Changes in this version

+ const DefaultAckedRetentionHours

+ const DefaultBackoffBase

+ const DefaultBackoffMax

+ const DefaultBatchSize

+ const DefaultConcurrency

+ const DefaultJanitorInterval

+ const DefaultLeaseDuration

+ const DefaultMaxAttempts

+ const DefaultMaxPayloadBytes

+ const DefaultPollInterval

+ const DefaultRetentionHours

+ const HeaderDeadLetterAttempts

+ const HeaderDeadLetterDeliveryID

+ const HeaderDeadLetterError

+ const HeaderDeadLetterGroup

+ const HeaderDeadLetterMessageID

+ const HeaderDeadLetterSourceTopic

+ const MaxIDLength

+ const MaxNameLength

+ var ErrClosed = errors.New("queue: closed")

+ var ErrDeadLetterLoop = errors.New("queue: dead letter topic is the subscribed topic")

+ var ErrInvalidName = errors.New("queue: invalid name")

+ var ErrNoLocker = errors.New("queue: distributed locker required")

+ var ErrPayloadTooLarge = errors.New("queue: payload too large")

+ var ErrScheduleTooFar = errors.New("queue: scheduled too far ahead")

+ var ErrUnsupported = errors.New("queue: unsupported")

+ func DeliveryID(messageID, group string) string

+ func IsPermanent(err error) bool

+ func NewProcessLocker() logstore.DistributedLocker

+ func Permanent(err error) error

+ func Register(t QueueType, f Factory)

+ func ValidateName(kind, name string) error

+ type ClaimRequest struct

+ Group string

+ Lease time.Duration

+ Max int

+ MaxInFlight int

+ RunnerID string

+ Topic string

+ type Claimed struct

+ Attempt int

+ ClaimToken string

+ DeliveryID string

+ Group string

+ Message *Message

+ type Config struct

+ Config any

+ Enabled bool

+ Type QueueType

+ func (c *Config) UnmarshalJSON(data []byte) error

+ type ConsumeChecker interface

+ CanConsume func() error

+ type Delivery struct

+ Attempt int

+ DeliveryID string

+ Group string

+ type Dependencies struct

+ Locker logstore.DistributedLocker

+ LogStore logstore.LogStore

+ type EngineConfig struct

+ AckedRetentionHours int

+ JanitorInterval string

+ MaxPayloadBytes int

+ RetentionHours int

+ func (c EngineConfig) Janitor() (time.Duration, error)

+ func (c EngineConfig) PurgePolicy() PurgePolicy

+ func (c EngineConfig) Retention() time.Duration

+ func (c EngineConfig) WithDefaults() EngineConfig

+ type Factory func(ctx context.Context, cfg *Config, deps Dependencies, logger schemas.Logger) (Queue, error)

+ type Handler func(ctx context.Context, d *Delivery) error

+ type LogStoreQueueConfig struct

+ type MemoryQueueConfig struct

+ type Message struct

+ DeliverAt time.Time

+ Headers map[string]string

+ ID string

+ Key string

+ Payload []byte

+ PublishedAt time.Time

+ Topic string

+ type Publisher interface

+ Publish func(ctx context.Context, msgs ...*Message) error

+ type PurgePolicy struct

+ AckedRetention time.Duration

+ DeadRetention time.Duration

+ type Queue interface

+ Close func(ctx context.Context) error

+ Ping func(ctx context.Context) error

+ Stats func(ctx context.Context, topic, group string) (Stats, error)

+ func NewQueue(ctx context.Context, cfg *Config, deps Dependencies, logger schemas.Logger) (Queue, error)

+ func NewStoreQueue(store Store, cfg EngineConfig, logger schemas.Logger) (Queue, error)

+ type QueueType string

+ const QueueTypeLogStore

+ const QueueTypeMemory

+ func Registered() []QueueType

+ type StartFrom string

+ const StartFromEarliest

+ const StartFromLatest

+ type Stats struct

+ Dead int64

+ Leased int64

+ Pending int64

+ type Store interface

+ Ack func(ctx context.Context, cs []*Claimed) ([]string, error)

+ Append func(ctx context.Context, msgs []*Message) error

+ Claim func(ctx context.Context, req ClaimRequest) ([]*Claimed, error)

+ Close func(ctx context.Context) error

+ EnsureGroup func(ctx context.Context, topic, group string, startFrom StartFrom) error

+ Extend func(ctx context.Context, cs []*Claimed, lease time.Duration) ([]string, error)

+ Kill func(ctx context.Context, c *Claimed, lastErr string) (bool, error)

+ Ping func(ctx context.Context) error

+ Purge func(ctx context.Context, policy PurgePolicy, batch int) (int64, error)

+ Release func(ctx context.Context, cs []*Claimed) error

+ Retry func(ctx context.Context, c *Claimed, backoff time.Duration, lastErr string) (bool, error)

+ Stats func(ctx context.Context, topic, group string) (Stats, error)

+ type SubscribeOption func(*SubscribeOptions)

+ func WithBackoff(base, max time.Duration) SubscribeOption

+ func WithBatchSize(n int) SubscribeOption

+ func WithConcurrency(n int) SubscribeOption

+ func WithDeadLetterTopic(topic string) SubscribeOption

+ func WithLeaseDuration(d time.Duration) SubscribeOption

+ func WithMaxAttempts(n int) SubscribeOption

+ func WithMaxInFlight(n int) SubscribeOption

+ func WithPollInterval(d time.Duration) SubscribeOption

+ func WithStartFrom(s StartFrom) SubscribeOption

+ type SubscribeOptions struct

+ BackoffBase time.Duration

+ BackoffMax time.Duration

+ BatchSize int

+ Concurrency int

+ DeadLetterTopic string

+ LeaseDuration time.Duration

+ MaxAttempts int

+ MaxInFlight int

+ PollInterval time.Duration

+ StartFrom StartFrom

+ func NewSubscribeOptions(opts ...SubscribeOption) (SubscribeOptions, error)

+ func (o SubscribeOptions) Backoff(attempt int, rnd func() float64) time.Duration

+ func (o SubscribeOptions) WithDefaults() SubscribeOptions

+ type Subscriber interface

+ Subscribe func(ctx context.Context, topic, group string, h Handler, opts ...SubscribeOption) (Subscription, error)

+ type Subscription interface

+ Close func(ctx context.Context) error

+ type WakeSource interface

+ Listen func(ctx context.Context, wake func(topic string)) error