pyzmq broker and client handlers with name based addressing
Project description
cobblr
This is a package for simple client-broker and client-client communications using the ZeroMQ package for python.
It is designed for M2M communications and easy passing of data between software modules. Each client program runs asynchronously in a single new background thread. Clients are addressed with a unique name and once registered with a broker can request new communications.
This package was built as part of the Digital Manufacturing on a Shoestring Project.
This library is in development.
Please check back soon!
API
from cobblr.cobblr import CobblrBroker
cb = CobblrBroker
Create and start a broker
from cobblr.cobblr import CobblrClient
cl = CobblrClient("cl_test")
Create and start a client named cl_test
cl.register()
Register client cl_test
with the running broker
from cobblr.cobblr import CobblrClient
cr = CobblrClient("cr_test")
cr.register()
Create, start and register client cr_test
cl.request_connection("cr_test")
Request a connection to client cr_test
from client cl_test
connection_list = cl.get_connected()
Populates connection_list
with names of connected clients and broker.
The broker is always named service
.
cl.send_message("cr_test",["string_1", "string_2"])
Sends a message from client cl_test
to client cr_test
, consisting of two
strings.
msg = ["no_msg"]
while msg == ["no_msg"]:
msg = cr.get_messages()
print(msg)
Loop to read message inbox on client cr_test
. Messages will be returned
as a list, with each entry a list of [<message number>, <from address>, <message contents>]
.
The inbox is cleared on reading.
cr.end
Ends client cr_test
.
API for pub-sub to be added soon
Features List
- Client name registration at broker
- Single IP space
- Multiple IP and Network support
- Request a connection to another named client
- Request - Response messaging pattern between named clients
- Publish - Subscribe messaging pattern
- Simple state machine with task prioritisation
- Asynchronous background operation
- Smooth shutdown and restart
- Heartbeat for network status and awareness
- Backup broker
- Network configuration save and load
- Message encryption
Project details
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