diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/zmq_device.txt | 32 |
1 files changed, 10 insertions, 22 deletions
diff --git a/doc/zmq_device.txt b/doc/zmq_device.txt index d5d7a18..6026559 100644 --- a/doc/zmq_device.txt +++ b/doc/zmq_device.txt @@ -31,13 +31,16 @@ Before calling _zmq_device()_ you must set any socket options, and connect or bind both frontend and backend sockets. The two conventional device models are: -* proxy model - accept inward connections to frontend socket (by binding it to - an endpoint), and make onward connections through backend socket (connecting - to endpoints on other nodes). A proxy device model can fit well into an - existing topology. -* broker model - accept connections on both frontend and backend sockets (by - binding both to endpoints). A broker device model creates a star topology - where nodes can come and go at any time. +*proxy*:: + bind frontend socket to an endpoint, and connect backend socket to + downstream components. A proxy device model does not require changes to + the downstream topology but that topology is static (any changes require + reconfiguring the device). +*broker*:: + bind frontend socket to one endpoint and bind backend socket to a second + endpoint. Downstream components must now connect into the device. A + broker device model allows a dynamic downstream topology (components can + come and go at any time). _zmq_device()_ runs in the current thread and returns only if/when the current context is closed. @@ -118,21 +121,6 @@ assert (zmq_bind (backend, "tcp://*:5556") == 0); zmq_device (ZMQ_QUEUE, frontend, backend); ---- -.Creating a pubsub proxy ----- -// Create frontend and backend sockets -void *frontend = zmq_socket (context, ZMQ_SUB); -assert (backend); -void *backend = zmq_socket (context, ZMQ_PUB); -assert (frontend); -// Connect frontend to publisher -assert (zmq_bind (frontend, "tcp://192.68.55.112:4444") == 0); -// Bind backend to TCP port -assert (zmq_bind (backend, "tcp://*:5556") == 0); -// Start a forwarder device -zmq_device (ZMQ_FORWARDER, frontend, backend); ----- - SEE ALSO -------- |