Struct InMemoryNatsQueue 

pub struct InMemoryNatsQueue { /* private fields */ }

Implementations

impl InMemoryNatsQueue

pub fn new() -> Self

pub async fn message_count(&self, topic: &str) -> usize

pub async fn subscriber_count(&self, topic: &str) -> usize

pub async fn in_flight_count(&self) -> usize

Trait Implementations

impl Default for InMemoryNatsQueue

fn default() -> Self

Returns the “default value” for a type.

impl MessageQueue for InMemoryNatsQueue

fn publish<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, topic: &'life1 str, message: &'life2 [u8], ) -> Pin<Box<dyn Future<Output = Result<(), MqError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

发布消息到指定 topic

fn consume<'life0, 'life1, 'async_trait>( &'life0 self, topic: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<Message>, MqError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

从指定 topic 消费一条消息（消息进入 in_flight 状态）

fn ack<'life0, 'life1, 'async_trait>( &'life0 self, message_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<(), MqError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

确认消息已处理完成（从 in_flight 移除）

fn subscribe<'life0, 'life1, 'async_trait>( &'life0 self, topic: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<(), MqError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

订阅 topic

fn nack<'life0, 'life1, 'async_trait>( &'life0 self, _message_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<(), MqError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

消息重回队列尾部（带重试次数追踪）

fn reject<'life0, 'life1, 'async_trait>( &'life0 self, _message_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<(), MqError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

消息直接进入死信队列（不重试，不增加 retry_count）