Struct TaskStoreConfig 

#[non_exhaustive]
pub struct TaskStoreConfig {
    pub max_capacity: Option<usize>,
    pub task_ttl: Option<Duration>,
    pub eviction_interval: u64,
    pub max_page_size: u32,
}

Configuration for InMemoryTaskStore.

#[non_exhaustive]: build it with Default and the with_* setters, which cover every field; a struct literal is not available outside this crate, so a field added later does not break callers.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

max_capacity: Option<usize>

Maximum number of tasks to keep in the store. Once exceeded, the oldest terminal (completed/failed/canceled/rejected) tasks are evicted first. None means no limit.

Overload behavior: if the overflow cannot be covered by terminal tasks alone, the oldest non-terminal tasks are evicted as a last resort — bounded memory is prioritized over retaining in-flight rows. An evicted in-flight task answers GetTask with task-not-found until its next event is persisted (the background processor re-saves it), so under sustained over-capacity write pressure the cap is a strong bound on steady-state size, not an absolute invariant. Size max_capacity above the realistic concurrent in-flight task count.

task_ttl: Option<Duration>

Time-to-live for completed or failed tasks. Tasks in terminal states older than this duration are evicted on the next write operation. None means no TTL-based eviction.

eviction_interval: u64

Number of writes between automatic eviction sweeps. Default: 64.

Amortizes the O(n) eviction cost so it doesn’t run on every single save().

max_page_size: u32

Maximum allowed page size for list queries. Default: 1000.

Larger requested page sizes are clamped to this limit.

Implementations

impl TaskStoreConfig

pub const fn with_max_capacity(self, max: Option<usize>) -> Self

Sets the maximum number of tasks kept; None is no limit. See max_capacity for what happens past it.

pub const fn with_task_ttl(self, ttl: Option<Duration>) -> Self

Sets the time-to-live for terminal tasks; None disables TTL eviction.

pub const fn with_eviction_interval(self, writes: u64) -> Self

Sets the number of writes between eviction sweeps.

pub const fn with_max_page_size(self, max: u32) -> Self

Sets the maximum page size for list queries.

Trait Implementations

impl Clone for TaskStoreConfig

fn clone(&self) -> TaskStoreConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TaskStoreConfig

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

Formats the value using the given formatter.

impl Default for TaskStoreConfig

fn default() -> Self

Returns the “default value” for a type.