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[PATCH v2 12/16] python/machine.py: Add _qmp access shim
From: |
John Snow |
Subject: |
[PATCH v2 12/16] python/machine.py: Add _qmp access shim |
Date: |
Tue, 2 Jun 2020 17:45:24 -0400 |
Like many other Optional[] types, it's not always a given that this
object will be set. Wrap it in a type-shim that raises a meaningful
error and will always return a concrete type.
Signed-off-by: John Snow <jsnow@redhat.com>
---
python/qemu/machine.py | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/python/qemu/machine.py b/python/qemu/machine.py
index 5add7a28eaf..9c45bdfb1e4 100644
--- a/python/qemu/machine.py
+++ b/python/qemu/machine.py
@@ -117,7 +117,7 @@ def __init__(self, binary, args=None, wrapper=None,
name=None,
self._events = []
self._iolog = None
self._qmp_set = True # Enable QMP monitor by default.
- self._qmp = None
+ self._qmp_connection: Optional[qmp.QEMUMonitorProtocol] = None
self._qemu_full_args = None
self._temp_dir = None
self._launched = False
@@ -283,7 +283,7 @@ def _pre_launch(self):
if self._remove_monitor_sockfile:
assert isinstance(self._monitor_address, str)
self._remove_files.append(self._monitor_address)
- self._qmp = qmp.QEMUMonitorProtocol(
+ self._qmp_connection = qmp.QEMUMonitorProtocol(
self._monitor_address,
server=True,
nickname=self._name
@@ -450,7 +450,13 @@ def set_qmp_monitor(self, enabled=True):
self._qmp_set = True
else:
self._qmp_set = False
- self._qmp = None
+ self._qmp_connection = None
+
+ @property
+ def _qmp(self) -> qmp.QEMUMonitorProtocol:
+ if self._qmp_connection is None:
+ raise QEMUMachineError("Attempt to access QMP with no connection")
+ return self._qmp_connection
@classmethod
def _qmp_args(cls, _conv_keys: bool = True, **args: Any) -> Dict[str, Any]:
--
2.21.3
- Re: [PATCH v2 05/16] python/qmp.py: add casts to JSON deserialization, (continued)
- [PATCH v2 06/16] python/qmp.py: add QMPProtocolError, John Snow, 2020/06/02
- [PATCH v2 09/16] python/machine.py: Don't modify state in _base_args(), John Snow, 2020/06/02
- [PATCH v2 07/16] python/machine.py: Fix monitor address typing, John Snow, 2020/06/02
- [PATCH v2 10/16] python/machine.py: Handle None events in event_wait, John Snow, 2020/06/02
- [PATCH v2 08/16] python/machine.py: reorder __init__, John Snow, 2020/06/02
- [PATCH v2 11/16] python/machine.py: use qmp.command, John Snow, 2020/06/02
- [PATCH v2 12/16] python/machine.py: Add _qmp access shim,
John Snow <=
- [PATCH v2 14/16] python/qemu: make 'args' style arguments immutable, John Snow, 2020/06/02
- [PATCH v2 13/16] python/machine.py: fix _popen access, John Snow, 2020/06/02
- [PATCH v2 15/16] iotests.py: Adjust HMP kwargs typing, John Snow, 2020/06/02
- [PATCH v2 16/16] python/qemu: Add mypy type annotations, John Snow, 2020/06/02
- Re: [PATCH v2 00/16] python: add mypy support to python/qemu, Eric Blake, 2020/06/02
- Re: [PATCH v2 00/16] python: add mypy support to python/qemu, Vladimir Sementsov-Ogievskiy, 2020/06/03