pbdZMQ (version 0.3-3.1)

Send Receive Multiple Raw Buffers: Send Receive Multiple Raw Buffers

Description

Send and receive functions for multiple raw buffers

Usage

zmq.send.multipart(socket, parts, serialize = TRUE)
zmq.recv.multipart(socket, unserialize = TRUE)

Arguments

socket

a ZMQ socket

parts

a vector of multiple buffers to be sent

serialize, unserialize

if serialize/unserialize the received multiple buffers

Value

zmq.send.multipart() returns.

zmq.recv.multipart() returns.

Details

zmq.send.multipart() is a high level R function to send multiple raw messages parts at once.

zmq.recv.multipart() is a high level R function to receive multiple raw messages at once.

References

ZeroMQ/4.1.0 API Reference: http://api.zeromq.org/4-1:_start

Programming with Big Data in R Website: http://r-pbd.org/

See Also

zmq.msg.send(), zmq.msg.recv().

Examples

# NOT RUN {
### Using request-reply pattern.

### At the server, run next in background or the other window.
library(pbdZMQ, quietly = TRUE)

context <- zmq.ctx.new()
responder <- zmq.socket(context, .pbd_env$ZMQ.ST$REP)
zmq.bind(responder, "tcp://*:5555")

ret <- zmq.recv.multipart(responder, unserialize = TRUE)
parts <- as.list(rep("World", 5))
zmq.send.multipart(responder, parts)
for(i in 1:5) cat(ret[[i]])

zmq.close(responder)
zmq.ctx.destroy(context)

### At a client, run next in foreground.
library(pbdZMQ, quietly = TRUE)

context <- zmq.ctx.new()
requester <- zmq.socket(context, .pbd_env$ZMQ.ST$REQ)
zmq.connect(requester, "tcp://localhost:5555")

parts <- lapply(1:5, function(i.req){ paste("Sending Hello ", i.req, "\n") })
zmq.send.multipart(requester, parts)
ret <- zmq.recv.multipart(requester, unserialize = TRUE)
print(ret)

zmq.close(requester)
zmq.ctx.destroy(context)
# }
# NOT RUN {
# }

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