For a socket or context using the surveyor protocol in a surveyor/respondent pattern. Set the survey timeout in milliseconds (remains valid for all subsequent surveys). Messages received by the surveyor after the timer has ended are discarded.
survey_time(con, value = 1000L)
a Socket or Context using the 'surveyor' protocol.
[default 1000L] integer survey timeout in milliseconds.
Invisibly, the passed Socket or Context.
After using this function, to start a new survey, the surveyor must:
send a message.
switch to receiving responses.
To respond to a survey, the respondent must:
receive the survey message.
send a reply using
send_aio before the survey has
timed out (a reply can only be sent after receiving a survey).
sur <- socket("surveyor", listen = "inproc://nanonext") res <- socket("respondent", dial = "inproc://nanonext") survey_time(sur, 1000) send(sur, "reply to this survey") #>  0 aio <- recv_aio(sur) recv(res) #>  "reply to this survey" s <- send_aio(res, "replied") call_aio(aio)$data #>  "replied" close(sur) close(res)