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QMP: add get_events(wait=True) option 

The get_events() function polls for new QMP events and then returns.  It
can be useful to wait for the next QMP event so add the boolean 'wait'
keyword argument.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2011-05-25 19:48:00 +01:00 committed by Luiz Capitulino
parent e9b4b432e7
commit 91b8eddf41
1 changed files with 8 additions and 3 deletions
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9
QMP/qmp.py
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@ -43,7 +43,7 @@ def __get_sock(self):
family = socket.AF_UNIX
return socket.socket(family, socket.SOCK_STREAM)
def __json_read(self):
def __json_read(self, only_event=False):
while True:
data = self.__sockfile.readline()
if not data:
@ -51,6 +51,7 @@ def __json_read(self):
resp = json.loads(data)
if 'event' in resp:
self.__events.append(resp)
if not only_event:
continue
return resp
@ -106,9 +107,11 @@ def cmd(self, name, args=None, id=None):
qmp_cmd['id'] = id
return self.cmd_obj(qmp_cmd)
def get_events(self):
def get_events(self, wait=False):
"""
Get a list of available QMP events.
@param wait: block until an event is available (bool)
"""
self.__sock.setblocking(0)
try:
@ -118,6 +121,8 @@ def get_events(self):
# No data available
pass
self.__sock.setblocking(1)
if not self.__events and wait:
self.__json_read(only_event=True)
return self.__events
def clear_events(self):