pub enum SystemConsumerStrategy {
DispatchToSingle,
RoundRobin,
Pinned,
}
Expand description
System supported consumer strategies for use with persistent subscriptions.
Variants
DispatchToSingle
Distributes events to a single client until the bufferSize is reached. After which the next client is selected in a round robin style, and the process is repeated.
RoundRobin
Distributes events to all clients evenly. If the client buffer-size is reached the client is ignored until events are acknowledged/not acknowledged.
Pinned
For use with an indexing projection such as the system $by_category projection. Event Store inspects event for its source stream id, hashing the id to one of 1024 buckets assigned to individual clients. When a client disconnects it’s buckets are assigned to other clients. When a client connects, it is assigned some of the existing buckets. This naively attempts to maintain a balanced workload. The main aim of this strategy is to decrease the likelihood of concurrency and ordering issues while maintaining load balancing. This is not a guarantee, and you should handle the usual ordering and concurrency issues.
Trait Implementations
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Auto Trait Implementations
impl RefUnwindSafe for SystemConsumerStrategy
impl Send for SystemConsumerStrategy
impl Sync for SystemConsumerStrategy
impl Unpin for SystemConsumerStrategy
impl UnwindSafe for SystemConsumerStrategy
Blanket Implementations
Mutably borrows from an owned value. Read more
Compare self to key
and return true
if they are equal.
Wrap the input message T
in a tonic::Request
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more