Struct hakuban::prelude::TagObserveContract
source · pub struct TagObserveContract { /* private fields */ }
Expand description
Represents a wish, a contract to observe all objects with specific tag
TagObserveContract is a Stream, emitting ObjectStateStream objects.
A new ObjectStateStream will get emitted if/when LocalExchange gets to know at least one ObjectState of an object tagged with the tag the contract pertains to. TagObserveContract will not emit more than one ObjectStateStream per object at a time. It will emit multiple ObjectStateStreams carrying ObjectStates of different objects. New ObjectStateStream for a specific object will only get emitted when previous ObjectStateStream of that object gets dropped.
The Stream will end when contract gets TagObserveContract::terminated.
Cloning
TagObserveContract can be cloned, but cloning does not create a new contract. Think of it as creating o paper copy of an on-paper contract. It’s a new sheet of paper, but not a new deal/agreement. Clones are basically references to a logical agreement.
Accordingly, terminating any of the clones (or the original), renders all of them terminated. Using mutiple clones as streams at the same time will have the clones race for the ObjectStateStreams.
Implementations§
source§impl TagObserveContract
impl TagObserveContract
pub fn descriptor(&self) -> &TagDescriptor
pub fn ready(&mut self) -> Vec<ObjectStateStream> ⓘ
pub fn terminate(&mut self)
Trait Implementations§
source§impl Clone for TagObserveContract
impl Clone for TagObserveContract
source§fn clone(&self) -> TagObserveContract
fn clone(&self) -> TagObserveContract
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Stream for TagObserveContract
impl Stream for TagObserveContract
§type Item = ObjectStateStream
type Item = ObjectStateStream
impl Unpin for TagObserveContract
Auto Trait Implementations§
impl RefUnwindSafe for TagObserveContract
impl Send for TagObserveContract
impl Sync for TagObserveContract
impl UnwindSafe for TagObserveContract
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