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Add an optional parameter to start(): quiet_on_read_error #6

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Add an optional parameter to start(): quiet_on_read_error #6

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2a7adb0
Add an optional parameter to start(): quiet_on_read_error
syl20bnr Dec 6, 2013
4cb019b
Remove unnecessary comments
syl20bnr Dec 6, 2013
847ba80
Rename quiet_on_read_err to quiet_on_io_err
syl20bnr Dec 6, 2013
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47 changes: 40 additions & 7 deletions ernie/ernie.py
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Original file line number Diff line number Diff line change
Expand Up @@ -63,7 +63,7 @@ def write_berp(self, output, obj):
output.write(data)
output.flush()

def start(self):
def start(self, quiet_on_io_err=False):
Ernie.log("Starting")
# On windows nouse_stdio is ignored by Erlang at the port creation,
# so we cannot use file descriptor 3 and 4 for communication.
Expand All @@ -75,7 +75,10 @@ def start(self):
while(True):
ipy = self.read_berp(input)
if ipy == None:
print 'Could not read BERP length header. Ernie server may have gone away. Exiting now.'
if not quiet_on_io_err:
print ('Could not read BERP length header. '
'Ernie server may have gone away. '
'Exiting now.')
exit()

if len(ipy) == 4 and ipy[0] == bert.Atom('call'):
Expand All @@ -85,28 +88,58 @@ def start(self):
res = self.dispatch(mod, fun, args)
opy = (bert.Atom('reply'), res)
self.log("<- " + opy.__str__())
self.write_berp(output, opy)
try:
self.write_berp(output, opy)
except IOError as e:
if quiet_on_io_err:
exit()
else:
raise e
except ServerError, e:
opy = (bert.Atom('error'), (bert.Atom('server'), 0, str(type(e)), str(e), ''))
self.log("<- " + opy.__str__())
self.write_berp(output, opy)
try:
self.write_berp(output, opy)
except IOError as e:
if quiet_on_io_err:
exit()
else:
raise e
except Exception, e:
opy = (bert.Atom('error'), (bert.Atom('user'), 0, str(type(e)), str(e), ''))
self.log("<- " + opy.__str__())
self.write_berp(output, opy)
try:
self.write_berp(output, opy)
except IOError as e:
if quiet_on_io_err:
exit()
else:
raise e
elif len(ipy) == 4 and ipy[0] == bert.Atom('cast'):
mod, fun, args = ipy[1:4]
self.log("-> " + ipy.__str__())
try:
res = self.dispatch(mod, fun, args)
except:
pass
self.write_berp(output, (bert.Atom('noreply')))
try:
self.write_berp(output, (bert.Atom('noreply')))
except IOError as e:
if quiet_on_io_err:
exit()
else:
raise e
else:
self.log("-> " + ipy.__str__())
opy = (bert.Atom('error'), (bert.Atom('server'), 0, "Invalid request: " + ipy.__str__()))
self.log("<- " + opy.__str__())
self.write_berp(output, opy)
try:
self.write_berp(output, opy)
except IOError as e:
if quiet_on_io_err:
exit()
else:
raise e

class ServerError(Exception):
def __init__(self, value):
Expand Down