preMaterialize
Materializes this Graph, immediately returning (1) its materialized value, and (2) a new pre-materialized Graph.
Signature
Source.preMaterialize
Source.preMaterialize
Flow.preMaterialize
Flow.preMaterialize
Description
Materializes this Graph, immediately returning (1) its materialized value, and (2) a new pre-materialized Graph.
Note that preMaterialize
is implemented through a reactive streams Publisher
for a Source
or a Publisher
and Subscriber
pair for a Flow
which means that a buffer is introduced and that errors are not propagated upstream but are turned into cancellations without error details.