def gWaitForMessage(self, sMsgType, sChartId, sMark, *lArgs):
"""
Raises a Mt4Timeout error if there is no answer in
oOptions['OTCmd2']['iRetvalTimeout'] seconds.
Raising an error lets us return None as a return value.
The protocol talking to Mt4 has the void return type,
which gRetvalToPython returns as None.
"""
from OTMql427.SimpleFormat import gRetvalToPython, lUnFormatMessage
self.eSendMessage(sMsgType, sChartId, sMark, *lArgs)
i = 0
iTimeout = self.oConfig['OTCmd2']['iRetvalTimeout']
self.vDebug("Waiting for: " +sMsgType +" " +sMark)
while i < int(iTimeout):
if sMsgType == 'exec':
s = self.oMixin.sRecvReply()
if s != "":
gRetval = gRetvalToPython(lUnFormatMessage(s))
return self.G(gRetval)
# drop through
elif sMsgType == 'cmd':
if sMark in self.oListenerThread.dRetvals.keys():
gRetval = self.oListenerThread.dRetvals[sMark]
del self.oListenerThread.dRetvals[sMark]
return self.G(gRetval)
else:
self.vError("Unrecognized sMsgType: " +sMsgType)
return None
i += 5
self.vDebug("Waiting: " +repr(i))
time.sleep(5.0)
self._G = None
raise Mt4Timeout("No retval returned in " +str(iTimeout) +" seconds")
def vCallbackOnListener(self, sBody):
sys.stdout.write("DEBUG: sBody: " + repr(sBody) + '\n')
lArgs = lUnFormatMessage(sBody)
sMsgType = lArgs[0]
sChart = lArgs[1]
sIgnore = lArgs[2] # should be a hash on the payload
sMark = lArgs[3]
sPayloadType = lArgs[4]
gPayload = lArgs[4:] # overwritten below
try:
# sys.stdout.write("INFO: sChart: " +repr(sChart) +'\n')
if sChart not in self.lCharts:
# keep a list of charts that we have seen for "chart list"
self.lCharts.append(sChart)
#? FixMe: what does null come back as?
if sMsgType == 'retval':
# gRetvalToPython requires
try:
gPayload = gRetvalToPython(lArgs)
except Exception as e:
sys.stdout.write(
"WARN: vCallbackOnListener error decoding to Python: %s\n%r"
% (
str(e),
sBody,
))
return
self.jLastRetval = gPayload
self.dRetvals[sMark] = gPayload
sys.stdout.write(
"DEBUG: vCallbackOnListener set dRetvals: %s\n" %
(sMark, ))
elif sMsgType == 'bar':
assert sPayloadType == 'json', \
sMsgType +" sPayloadType expected 'json' not " \
+sPayloadType +"\n" +sBody
# can use this to find the current bid and ask
gPayload = json.loads(lArgs[5])
self.jLastBar = gPayload
elif sMsgType == 'tick':
assert sPayloadType == 'json', \
sMsgType +" sPayloadType expected 'json' not " \
+sPayloadType +"\n" +sBody
# can use this to find the current bid and ask
gPayload = json.loads(lArgs[5])
self.jLastTick = gPayload
elif sMsgType == 'timer':
assert sPayloadType == 'json', \
sMsgType +" sPayloadType expected 'json'" +"\n" +sBody
# can use this to find if we are currently connected
gPayload = json.loads(lArgs[5])
self.gLastTimer = gPayload
elif sMsgType in ['cmd', 'exec']:
#? why do we see outgoing messages?
return
else:
sys.stdout.write(
"WARN: vCallbackOnListener unrecognized sMsgType: %r\n" %
(sBody, ))
return
# may need to print more info here - chart and sMark
if sMsgType == 'retval':
# FixMe: not sure where these None are coming from
if gPayload is not None:
# you really need sMark for retval
self.vPprint(sMsgType, gPayload, "INFO: [" + sMark + "] ")
else:
self.vPprint(sMsgType, gPayload)
except Exception as e:
sys.stderr.write(traceback.format_exc(10) + "\n")
def vCallbackOnListener(self, sBody):
sys.stdout.write("DEBUG: sBody: " +repr(sBody) +'\n')
lArgs = lUnFormatMessage(sBody)
sMsgType = lArgs[0]
sChart = lArgs[1]
sIgnore = lArgs[2] # should be a hash on the payload
sMark = lArgs[3]
sPayloadType = lArgs[4]
gPayload = lArgs[4:] # overwritten below
try:
# sys.stdout.write("INFO: sChart: " +repr(sChart) +'\n')
if sChart not in self.lCharts:
# keep a list of charts that we have seen for "chart list"
self.lCharts.append(sChart)
#? FixMe: what does null come back as?
if sMsgType == 'retval':
# gRetvalToPython requires
try:
gPayload = gRetvalToPython(lArgs)
except Exception as e:
sys.stdout.write("WARN: vCallbackOnListener error decoding to Python: %s\n%r" % (str(e), sBody, ))
return
self.jLastRetval = gPayload
self.dRetvals[sMark] = gPayload
sys.stdout.write("DEBUG: vCallbackOnListener set dRetvals: %s\n" % (sMark, ))
elif sMsgType == 'bar':
assert sPayloadType == 'json', \
sMsgType +" sPayloadType expected 'json' not " \
+sPayloadType +"\n" +sBody
# can use this to find the current bid and ask
gPayload = json.loads(lArgs[5])
self.jLastBar = gPayload
elif sMsgType == 'tick':
assert sPayloadType == 'json', \
sMsgType +" sPayloadType expected 'json' not " \
+sPayloadType +"\n" +sBody
# can use this to find the current bid and ask
gPayload =json.loads(lArgs[5])
self.jLastTick = gPayload
elif sMsgType == 'timer':
assert sPayloadType == 'json', \
sMsgType +" sPayloadType expected 'json'" +"\n" +sBody
# can use this to find if we are currently connected
gPayload = json.loads(lArgs[5])
self.gLastTimer = gPayload
elif sMsgType in ['cmd', 'exec']:
#? why do we see outgoing messages?
return
else:
sys.stdout.write("WARN: vCallbackOnListener unrecognized sMsgType: %r\n" % (sBody, ))
return
# may need to print more info here - chart and sMark
if sMsgType == 'retval':
# FixMe: not sure where these None are coming from
if gPayload is not None:
# you really need sMark for retval
self.vPprint(sMsgType, gPayload, "INFO: [" +sMark +"] ")
else:
self.vPprint(sMsgType, gPayload)
except Exception as e:
sys.stderr.write(traceback.format_exc(10) +"\n")