Skip to main content

InHandler

datum::graph

Trait InHandler 

Source 
pub trait InHandler: Send {
    // Provided methods
    fn on_push(
        &mut self,
        _logic: &mut GraphStageLogic,
        _inlet: AnyInlet,
    ) -> StreamResult<()> { ... }
    fn on_upstream_finish(
        &mut self,
        _logic: &mut GraphStageLogic,
        _inlet: AnyInlet,
    ) -> StreamResult<()> { ... }
    fn on_upstream_failure(
        &mut self,
        logic: &mut GraphStageLogic,
        _inlet: AnyInlet,
        cause: StreamError,
    ) -> StreamResult<()> { ... }
}
Expand description

Reacts to events on one inlet. The default on_upstream_failure fails the whole stage; override any method a stage needs.

Provided Methods§

Source

fn on_push( &mut self, _logic: &mut GraphStageLogic, _inlet: AnyInlet, ) -> StreamResult<()>

An element is available on the inlet — grab it.

Source

fn on_upstream_finish( &mut self, _logic: &mut GraphStageLogic, _inlet: AnyInlet, ) -> StreamResult<()>

Upstream completed; no more elements will arrive on this inlet.

Source

fn on_upstream_failure( &mut self, logic: &mut GraphStageLogic, _inlet: AnyInlet, cause: StreamError, ) -> StreamResult<()>

Upstream failed. Default: fail the whole stage with the same cause.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§