Merge pull request #146 from arun11299/master

Ability to access the connection identifier

nats/aio/client.py

@@ -167,6 +167,13 @@ def __init__(self):
         self._reconnection_task = None
         self._reconnection_task_future = None
         self._max_payload = DEFAULT_MAX_PAYLOAD_SIZE
+        # This is the client id that the NATS server knows
+        # about. Useful in debugging application errors
+        # when logged with this identifier along
+        # with nats server log.
+        # This would make more sense if we log the server
+        # connected to as well in case of cluster setup.
+        self._client_id = None
         self._ssid = 0
         self._subs = {}
         self._status = Client.DISCONNECTED
@@ -510,6 +517,9 @@ async def _close(self, status, do_cbs=True):
             if self._closed_cb is not None:
                 await self._closed_cb()
 
+        # Set the client_id back to None
+        self._client_id = None
+
     async def drain(self, sid=None):
         """
         Drain will put a connection into a drain state. All subscriptions will
@@ -1015,6 +1025,13 @@ def max_payload(self):
         """
         return self._max_payload
 
+    @property
+    def client_id(self):
+        """
+        Returns the client id which we received from the servers INFO
+        """
+        return self._client_id
+
     @property
     def last_error(self):
         """
@@ -1510,6 +1527,9 @@ async def _process_connect_init(self):
         if 'max_payload' in self._server_info:
             self._max_payload = self._server_info["max_payload"]
 
+        if 'client_id' in self._server_info:
+            self._client_id = self._server_info["client_id"]
+
         if 'tls_required' in self._server_info and self._server_info[
                 'tls_required']:
             ssl_context = None