scala - Akka streams - emit materialized value -


when creating graph using builder can emit message once stream has been materialized:

builder.materializedvalue.map(actor => userjoined(actor))

how can achieve same effect when creating flow without graph api?

val source = source.actorref[message](5, overflowstrategy.dropnew) val initmessage = srcactor.mapmaterializedvalue(a => playerjoined(a))

how can make initmessage emitted merged source , passed sink without graph dsl api?


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