[PATCH v3] python/qemu/qmp.py: QMP debug with VM label

[Oksana Vohchana]

QEMUMachine writes some messages to the default logger.
But it sometimes hard to read the output if we have requests to
more than one VM.
This patch adds a label to the logger in the debug mode.

Signed-off-by: Oksana Vohchana <address@hidden>
---
v2:
 - Instead of shown the label in the message it provides the label
   only in the debug logger information
v3:
 - Fixes coding style problems
---
 python/qemu/machine.py | 3 ++-
 python/qemu/qmp.py     | 5 ++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/python/qemu/machine.py b/python/qemu/machine.py
index 183d8f3d38..f53abfa492 100644
--- a/python/qemu/machine.py
+++ b/python/qemu/machine.py
@@ -270,7 +270,8 @@ class QEMUMachine(object):
                 self._vm_monitor = os.path.join(self._sock_dir,
                                                 self._name + "-monitor.sock")
                 self._remove_files.append(self._vm_monitor)
-            self._qmp = qmp.QEMUMonitorProtocol(self._vm_monitor, server=True)
+            self._qmp = qmp.QEMUMonitorProtocol(self._vm_monitor, server=True,
+                                                nickname=self._name)
 
     def _post_launch(self):
         if self._qmp:
diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py
index f40586eedd..d58b18c304 100644
--- a/python/qemu/qmp.py
+++ b/python/qemu/qmp.py
@@ -46,7 +46,7 @@ class QEMUMonitorProtocol:
     #: Logger object for debugging messages
     logger = logging.getLogger('QMP')
 
-    def __init__(self, address, server=False):
+    def __init__(self, address, server=False, nickname=None):
         """
         Create a QEMUMonitorProtocol class.
 
@@ -62,6 +62,7 @@ class QEMUMonitorProtocol:
         self.__address = address
         self.__sock = self.__get_sock()
         self.__sockfile = None
+        self._nickname = nickname
         if server:
             self.__sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
             self.__sock.bind(self.__address)
@@ -188,6 +189,8 @@ class QEMUMonitorProtocol:
         @return QMP response as a Python dict or None if the connection has
                 been closed
         """
+        if self._nickname:
+            self.logger.name = 'QMP.{}'.format(self._nickname)
         self.logger.debug(">>> %s", qmp_cmd)
         try:
             self.__sock.sendall(json.dumps(qmp_cmd).encode('utf-8'))
-- 
2.21.1