Struct EventQueueManager 

pub struct EventQueueManager { /* private fields */ }

Manages event queues for active tasks.

Each task can have at most one active writer. When a client subscribes (or resubscribes), the manager returns the existing writer and a fresh reader, or creates both if none exists.

Implementations

impl EventQueueManager

pub fn new() -> Self

Creates a new, empty event queue manager with default capacity.

Examples

use a2a_protocol_server::EventQueueManager;

let manager = EventQueueManager::new();

pub fn with_capacity(capacity: usize) -> Self

Creates a new event queue manager with the specified channel capacity.

pub const fn with_max_event_size(self, max_event_size: usize) -> Self

Creates a new event queue manager with the specified maximum event size.

Events exceeding this size (in serialized bytes) will be rejected with an error to prevent OOM conditions.

pub const fn with_max_concurrent_queues(self, max: usize) -> Self

Sets the maximum number of concurrent event queues.

When the limit is reached, new queue creation will return an error reader (None) to signal capacity exhaustion.

pub async fn get_or_create( &self, task_id: &TaskId, ) -> (Arc<InMemoryQueueWriter>, Option<InMemoryQueueReader>)

Returns the writer for the given task, creating a new queue if none exists.

If a queue already exists, the returned reader is None (the original reader was given out at creation time). If a new queue is created, both the writer and reader are returned.

If max_concurrent_queues is set and the limit is reached, returns the writer with None reader (same as existing queue case).

pub async fn destroy(&self, task_id: &TaskId)

Removes and drops the event queue for the given task.

pub async fn active_count(&self) -> usize

Returns the number of active event queues.

pub async fn destroy_all(&self)

Removes all event queues, causing all readers to see EOF.

Trait Implementations

impl Clone for EventQueueManager

fn clone(&self) -> EventQueueManager

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EventQueueManager

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for EventQueueManager

fn default() -> Self

Returns the “default value” for a type.