MappedReadChannel

Special type which is used in select statement.

Synonim for read.

read value and return future with

• Some(value) if value is available to read
• None if stream is closed.

async version of read. Immediatly return future, which will contains result of read or failur with StreamClosedException in case of stream is closed.

return F which contains sequence from first n elements.

run code each time when new object is arriced. until end of stream is not reached

read value and return

• Some(value) if value is available to read
• None if stream is closed.

should be called inside async block.

blocked read: if currently not element available - wait for one. Can be used only inside async block. If stream is closed and no values to read left in the stream - throws StreamClosedException

take first n elements. should be called inside async block.