Struct WeakJoinMiddleware 

pub struct WeakJoinMiddleware {
    pub group_by: String,
    pub expected_count: usize,
    pub timeout_ms: u64,
    pub branch_by: Option<String>,
    pub required: Vec<String>,
    pub on_timeout: WeakJoinTimeout,
}

Weak Join middleware configuration.

Correlates messages by a metadata key and joins them within a timeout window. Count mode (default) waits for expected_count messages and emits a JSON array. Branch mode (set branch_by) waits for named branches and emits a branch-keyed object.

Fields

group_by: String

The metadata key to group messages by (e.g., “correlation_id”).

expected_count: usize

The number of messages (count mode) or distinct branches (branch mode) to wait for.

timeout_ms: u64

Timeout in milliseconds.

branch_by: Option<String>

Metadata key naming each message’s branch; enables branch mode when set.

required: Vec<String>

Branch names that must all arrive before firing (branch mode; overrides expected_count).

on_timeout: WeakJoinTimeout

What to do with an incomplete group when the timeout expires.

Trait Implementations

impl Clone for WeakJoinMiddleware

fn clone(&self) -> WeakJoinMiddleware

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WeakJoinMiddleware

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WeakJoinMiddleware

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for WeakJoinMiddleware

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.