rewrite to zmq push and pull patterns.

file load works, suite can start up

Azaion.AI/remote_command_handler.pyx

@@ -0,0 +1,78 @@
+from queue import Queue
+
+import zmq
+import json
+from threading import Thread, Event
+from remote_command cimport RemoteCommand
+
+cdef class RemoteCommandHandler:
+    def __init__(self, object on_command):
+        self._on_command = on_command
+        self._context = zmq.Context.instance()
+        self._shutdown_event = Event()
+
+        self._pull_socket = self._context.socket(zmq.PULL)
+        self._pull_socket.setsockopt(zmq.LINGER, 0)
+        self._pull_socket.bind("tcp://*:5127")
+        self._pull_thread = Thread(target=self._pull_loop, daemon=True)
+
+        self._push_queue = Queue()
+
+        self._push_socket = self._context.socket(zmq.PUSH)
+        self._push_socket.setsockopt(zmq.LINGER, 0)
+        self._push_socket.bind("tcp://*:5128")
+        self._push_thread = Thread(target=self._push_loop, daemon=True)
+
+    cdef start(self):
+        self._pull_thread.start()
+        self._push_thread.start()
+
+    cdef _pull_loop(self):
+        while not self._shutdown_event.is_set():
+            print('wait for the command...')
+            message = self._pull_socket.recv()
+            cmd = RemoteCommand.from_msgpack(<bytes>message)
+            print(f'received: {cmd}')
+            self._on_command(cmd)
+
+    cdef _push_loop(self):
+        while not self._shutdown_event.is_set():
+            try:
+                response = self._push_queue.get(timeout=1) # Timeout to check shutdown flag
+                self._push_socket.send(response)
+            except:
+                continue
+
+    cdef send(self, bytes message_bytes):
+        print(f'about to send {len(message_bytes)}')
+        try:
+            self._push_queue.put(message_bytes)
+        except Exception as e:
+            print(e)
+
+    cdef close(self):
+        self._shutdown_event.set()
+        self._pull_socket.close()
+        self._push_socket.close()
+        self._context.term()
+
+
+cdef class QueueConfig:
+    cdef str host,
+    cdef int port, command_port
+    cdef str producer_user, producer_pw, consumer_user, consumer_pw
+
+    @staticmethod
+    cdef QueueConfig from_json(str json_string):
+        s = str(json_string).strip()
+        cdef dict config_dict = json.loads(s)["QueueConfig"]
+        cdef QueueConfig config = QueueConfig()
+
+        config.host = config_dict["Host"]
+        config.port = config_dict["Port"]
+        config.command_port = config_dict["CommandsPort"]
+        config.producer_user = config_dict["ProducerUsername"]
+        config.producer_pw = config_dict["ProducerPassword"]
+        config.consumer_user = config_dict["ConsumerUsername"]
+        config.consumer_pw = config_dict["ConsumerPassword"]
+        return config