Open a new Context to be used with a Socket. The purpose of a Context is to permit applications to share a single socket, with its underlying dialers and listeners, while still benefiting from separate state tracking.

context(socket)

socket

a Socket.

## Value

A new Context (object of class 'nanoContext' and 'nano').

## Details

Contexts allow the independent and concurrent use of stateful operations using the same socket. For example, two different contexts created on a rep socket can each receive requests, and send replies to them, without any regard to or interference with each other.

Only the following protocols support creation of contexts: req, rep, sub (in a pub/sub pattern), surveyor, respondent.

To send and receive over a context use send and recv or their async counterparts send_aio and recv_aio.

For nano objects, use the $context() method, which will return a new context. ## Examples s <- socket("req", listen = "inproc://nanonext") ctx <- context(s) ctx #> < nanoContext > #> - id: 1 #> - socket: 3 #> - state: opened #> - protocol: req close(ctx) close(s) n <- nano("req", listen = "inproc://nanonext") ctx <- n$context()
ctx
#> < nanoContext >
#>  - id: 2
#>  - socket: 4
#>  - state: opened
#>  - protocol: req
close(ctx)
n\$close()