Trait int_compute::Query

pub trait Query {
    fn query<'a, 'b, 'r>(
        &'a self, 
        filter: &'b RefHeaders<'b>
    ) -> Box<Iterator<Item = FlowTags> + 'r>
    where
        'a: 'r,
        'b: 'r;
}

An interface to query existing flows.

While an Event carries the FlowTags of the flow that caused it (and therefore the flow can be examined directly), access to the other existing flows can be performed through this interface. The interface is passed with every event.

Required Methods

fn query<'a, 'b, 'r>(
    &'a self,
    filter: &'b RefHeaders<'b>
) -> Box<Iterator<Item = FlowTags> + 'r> where
    'a: 'r,
    'b: 'r, 

Performs a query of the existing flows.

It returns an iterator for all the flows that match the filter. The filter is applied in a similar way as in the user's query ‒ a flow must match on all the present columns. To match on one, the value of the column on the flow must be present in the corresponding RefHeader of the filter (eg. the filter is CNF).

Implementors