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qemu.py: Use custom exceptions rather than Exception

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The naked Exception should not be widely used. It makes sense to be a
bit more specific and use better-suited custom exceptions. As a benefit
we can store the full reply in the exception in case someone needs it
when catching the exception.

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170818142613.32394-6-ldoktor@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Lukáš Doktor 2017-08-18 16:26:08 +02:00 committed by Eduardo Habkost
parent 41f714b190
commit a004e249f0
1 changed files with 15 additions and 2 deletions
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17
scripts/qemu.py
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@ -19,6 +19,19 @@ import subprocess
import qmp.qmp
class MonitorResponseError(qmp.qmp.QMPError):
'''
Represents erroneous QMP monitor reply
'''
def __init__(self, reply):
try:
desc = reply["error"]["desc"]
except KeyError:
desc = reply
super(MonitorResponseError, self).__init__(desc)
self.reply = reply
class QEMUMachine(object):
'''A QEMU VM
@ -213,9 +226,9 @@ class QEMUMachine(object):
'''
reply = self.qmp(cmd, conv_keys, **args)
if reply is None:
raise Exception("Monitor is closed")
raise qmp.qmp.QMPError("Monitor is closed")
if "error" in reply:
raise Exception(reply["error"]["desc"])
raise MonitorResponseError(reply)
return reply["return"]
def get_qmp_event(self, wait=False):