Hi,
for a couple of week i search how i should handle mysql disconnection on
my twisted web service. When I restart the database without restarting
my service i got some ConnectionLost fired. I have used the cp_reconnect
on the connection pool and it seem to work ( the lost connection is
restarted ) but the current query isn't executed.
So my question is how should I handle this case. Should I intercept the
connectionLost and restart the query ? I have several queries in a
single deffer so this method is not easy and clear.
Any advice whould be welcome.
I join the code of a sample resource.
Thanks
Sébastien HEITZMANN
class StartResource(resource.Resource):
def __init__(self, dbConnection, mdbConnection, config):
self.db = dbConnection
self.mdb = mdbConnection
resource.Resource.__init__(self)
def render_POST(self, request):
try:
uid = request.args['uid'][0]
key = request.args['kkey'][0]
conf = unicode(request.args['conf'][0],'utf8')
self.db.runInteraction(self._start, uid, key, conf, request)
return server.NOT_DONE_YET
except Exception, e:
print str(e)
request.setResponseCode(http.INTERNAL_SERVER_ERROR, str(e))
request.write('ERROR:'+str(e))
request.finish()
def _start(self, trans, uid, key, conf, request):
try:
if not utils.checkKKEY(uid, key, trans):
r_status = 'ko'
r_action = ''
r_params = 'kkey invalid'
request.write(json.write([r_status, r_action, r_params]))
request.finish()
return None
query = "UPDATE kserver.b set status=-1 where status=0 and
uid=%s"
query %= (str(uid))
trans.execute(query)
query = u"INSERT INTO `b` (uid, conf)"
query += " VALUES(%s, '%s');" % ( str(uid), dbutil.safe(conf) )
trans.execute(query)
bid = trans._cursor.connection.insert_id()
#trans.commit()
r_status = 'ok'
r_action = ''
r_params = {'bid':str(bid)}
request.write(json.write([r_status, r_action, r_params]))
request.finish()
except Exception, e:
print str(e)
request.setResponseCode(http.INTERNAL_SERVER_ERROR, str(e))
request.write('ERROR:'+str(e))
request.finish()
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