src/control_backend/agents/test_agent.py

@@ -1,4 +1,37 @@
+import json
+import logging
 from spade.agent import Agent
+from spade.behaviour import CyclicBehaviour
+import zmq
+
+from control_backend.core.config import settings
+from control_backend.core.zmq_context import context
+from control_backend.schemas.message import Message
+
+logger = logging.getLogger(__name__)
 
 class TestAgent(Agent):
-    pass
+    socket: zmq.Socket
+
+    class ListenBehaviour(CyclicBehaviour):
+        async def run(self):
+            assert self.agent is not None
+            topic, body = await self.agent.socket.recv_multipart()
+            
+            try:
+                message_json = json.loads(body.decode("utf-8"))
+                message = Message.model_validate(message_json)
+                logger.info("Received message \"%s\"", message.message)
+            except Exception as e:
+                logger.error("Error processing message: %s", e)
+
+    async def setup(self):
+        logger.info("Setting up %s", self.jid)
+        self.socket = context.socket(zmq.SUB)
+        self.socket.connect(settings.zmq_settings.internal_comm_address)
+        self.socket.setsockopt(zmq.SUBSCRIBE, b"message")
+
+        b = self.ListenBehaviour()
+        self.add_behaviour(b)
+
+        logger.info("Finished setting up %s", self.jid)

src/control_backend/api/v1/endpoints/message.py

@@ -1,13 +1,23 @@
 from fastapi import APIRouter, Request
 import logging
 
+from zmq import Socket
+
 from control_backend.schemas.message import Message
 
 logger = logging.getLogger(__name__)
 
 router = APIRouter()
 
-# TODO: implement
-@router.post("/message")
+@router.post("/message", status_code=202)
 async def receive_message(message: Message, request: Request):
     logger.info("Received message: %s", message.message)
+
+    topic = b"message"
+    body = message.model_dump_json().encode("utf-8")
+
+    pub_socket: Socket = request.app.state.internal_comm_socket
+
+    pub_socket.send_multipart([topic, body])
+
+    return {"status": "Message received"}

src/control_backend/core/config.py

@@ -1,11 +1,16 @@
-from pydantic import HttpUrl
+from pydantic import BaseModel
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
+class ZMQSettings(BaseModel):
+    internal_comm_address: str = "tcp://localhost:5560"
+
 class Settings(BaseSettings):
     app_title: str = "PepperPlus"
     
     ui_url: str = "http://localhost:5173"
+
+    zmq_settings: ZMQSettings = ZMQSettings()
     
     model_config = SettingsConfigDict(env_file=".env")
     
-settings = Settings()
+settings = Settings()

src/control_backend/core/zmq_context.py

@@ -0,0 +1,3 @@
+from zmq.asyncio import Context
+
+context = Context()

src/control_backend/main.py

@@ -3,10 +3,13 @@ import contextlib
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 import logging
+import zmq
 
 # Internal imports
+from control_backend.agents.test_agent import TestAgent
 from control_backend.api.v1.router import api_router
 from control_backend.core.config import settings
+from control_backend.core.zmq_context import context
 
 logger = logging.getLogger(__name__)
 logging.basicConfig(level=logging.INFO)
@@ -14,6 +17,17 @@ logging.basicConfig(level=logging.INFO)
 @contextlib.asynccontextmanager
 async def lifespan(app: FastAPI):
     logger.info("%s starting up.", app.title)
+
+    # Initiate sockets
+    internal_comm_socket = context.socket(zmq.PUB)
+    internal_comm_address = settings.zmq_settings.internal_comm_address
+    internal_comm_socket.bind(internal_comm_address)
+    app.state.internal_comm_socket = internal_comm_socket
+    logger.info("Internal publishing socket bound to %s", internal_comm_socket)
+
+    # Initiate agents
+    test_agent = TestAgent("test_agent@localhost", "test_agent")
+    await test_agent.start()
     
     yield
     
@@ -34,4 +48,4 @@ app.include_router(api_router, prefix="") # TODO: make prefix /api/v1
 
 @app.get("/")
 async def root():
-    return {"status": "ok"}
+    return {"status": "ok"}