Demonstrates request/response communication between ZeroMQ nodes. The server port sets what port the server listens to and the client port sets what port the client will connect to. For the client, use the port of the server you want it to connect to.
Expanded to do a demo of ping/pong computation. Setting up a peer to peer network will result in each node running a calculation, then pushing the result to a peer which will continue the calculation, in turn, pushing its result to another peer.
This uses ZeroMQ to handle the networking and messaging layer. Make sure that you have the core ZeroMQ library installed:
On MacOS:
brew install zmq
On Fedora:
dnf install zeromq-devel
On Ubuntu:
apt-get install libzmq3-dev
You can have a node talk with itself by setting the client and server ports as the same.
cargo run -- -s 5555 -c 5555
You can have two nodes talk with each other via:
cargo run -- -s 5555 -c 7878
cargo run -- -s 7878 -c 5555
Or you can have a ring:
cargo run -- -s 5555 -c 7878
cargo run -- -s 7878 -c 9090
cargo run -- -s 9090 -c 5555
None of these setups will actually result in a calculation being done, because there is no
input data to initiate the worker. So, you need to tell one of the nodes to "prime" the pump
with the -p/--prime flag, this will send an initial value to the worker thread and begin
the calculation. (Multiple nodes can be set to prime the pump, the results could be unpredictable
with this :) )