finopt/comms/tws_gateway.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

##
# This script is an exmple of using the generated code within IbPy in
# the same manner as the Java code.  We subclass EWrapper and give an
# instance of the wrapper to an EClientSocket.
##


import sys
from time import sleep, strftime
import time, datetime
import ConfigParser
from optparse import OptionParser
import logging
import thread
import threading
import traceback
import json
from threading import Lock
from ib.ext.Contract import Contract
from ib.ext.EWrapper import EWrapper
from ib.ext.EClientSocket import EClientSocket
from ib.ext.ExecutionFilter import ExecutionFilter
from ib.ext.Execution import Execution
from ib.ext.OrderState import OrderState
from ib.ext.Order import Order

from kafka.client import KafkaClient
from kafka import KafkaConsumer
from kafka.producer import SimpleProducer
from kafka.common import LeaderNotAvailableError

from misc2.helpers import ContractHelper, OrderHelper, ExecutionFilterHelper
from comms.ib_heartbeat import IbHeartBeat
from tws_protocol_helper import TWS_Protocol 

import redis
         

        
        
class TWS_event_handler(EWrapper):

    TICKER_GAP = 1000
    producer = None
    
    def __init__(self, host, port):
        
        client = KafkaClient('%s:%s' % (host, port))
        self.producer = SimpleProducer(client, async=False)    
        logging.info('TWS_event_handler: __init__ Creating kafka client producer at %s:%s' % (host, port))
 
 
    def serialize_vars_to_dict(self, message, mapping, source='IB'):
        def create_kmessage(items):
            d = {}
            for k,v in items:
                #print k, v, type(v)
                #if type(v) in [Contract, Execution, ExecutionFilter, OrderState, Order, CommissionReport]:
                if 'ib.ext.' in str(type(v)):     
                    d[k] = v.__dict__
                else:
                    d[k] = v
    
               
            d['ts'] = time.time()
            d['typeName'] = message
            d['source'] = source
            return d
        
        
        try:
            del(mapping['self'])
        except (KeyError, ):
            pass
        items = list(mapping.items())
        return create_kmessage(items)
 
    def broadcast_event(self, message, mapping, source='IB'):

        try:
            dict = self.serialize_vars_to_dict(message, mapping, source)     
            if message == 'gw_subscriptions':   
                logging.info('TWS_event_handler: broadcast event: %s [%s]' % (dict['typeName'], dict))
            self.producer.send_messages(message, json.dumps(dict))    
        except:
            logging.error('broadcast_event: exception while encoding IB event to client:  [%s]' % message)
            logging.error(traceback.format_exc())
            
            #
            # try to broadcast the message a 2nd time
            # no catch if fails again
            if message == 'gw_subscriptions':   
                sleep(2)
                logging.info('TWS_event_handler: Retry once broadcasting gw_subscription ' % (dict['typeName'], dict))
                self.producer.send_messages(message, json.dumps(dict))    
            
            

    
    def tick_process_message(self, items):
        
        t = {}
        t = items.copy()
        # if the tickerId is in the snapshot range
        # deduct the gap to derive the original tickerId
        # --- check logic in subscription manager
        if (t['tickerId']  >= TWS_event_handler.TICKER_GAP):
            t['tickerId'] = t['tickerId']  - TWS_event_handler.TICKER_GAP
        try:
            del(t['self'])
        except (KeyError, ):
            pass          
        
        return t  
            
                
    
    def tickPrice(self, tickerId, field, price, canAutoExecute):
        
        self.broadcast_event('tickPrice', self.tick_process_message(vars()))

    def tickSize(self, tickerId, field, size):
        
        self.broadcast_event('tickSize', self.tick_process_message(vars())) #vars())

    def tickOptionComputation(self, tickerId, field, impliedVol, delta, optPrice, pvDividend, gamma, vega, theta, undPrice):
        
        #self.broadcast_event('tickOptionComputation', self.tick_process_message(vars())) #vars())
        pass

    def tickGeneric(self, tickerId, tickType, value):
        #self.broadcast_event('tickGeneric', vars())
        self.broadcast_event('tickGeneric', self.tick_process_message(vars())) #vars())

    def tickString(self, tickerId, tickType, value):
        #self.broadcast_event('tickString', vars())
        self.broadcast_event('tickString', self.tick_process_message(vars())) #vars())

    def tickEFP(self, tickerId, tickType, basisPoints, formattedBasisPoints, impliedFuture, holdDays, futureExpiry, dividendImpact, dividendsToExpiry):
        self.broadcast_event('tickEFP', vars())

    def orderStatus(self, orderId, status, filled, remaining, avgFillPrice, permId, parentId, lastFillPrice, clientId, whyHeId):
        self.broadcast_event('orderStatus', vars())

    def openOrder(self, orderId, contract, order, state):
        self.broadcast_event('openOrder', vars())

    def openOrderEnd(self):
        self.broadcast_event('openOrderEnd', vars())

    def updateAccountValue(self, key, value, currency, accountName):
        self.broadcast_event('updateAccountValue', vars())

    def updatePortfolio(self, contract, position, marketPrice, marketValue, averageCost, unrealizedPNL, realizedPNL, accountName):
        self.broadcast_event('updatePortfolio', vars())

    def updateAccountTime(self, timeStamp):
        self.broadcast_event('updateAccountTime', vars())

    def accountDownloadEnd(self, accountName):
        self.broadcast_event('accountDownloadEnd', vars())

    def nextValidId(self, orderId):
        self.broadcast_event('nextValidId', vars())

    def contractDetails(self, reqId, contractDetails):
        self.broadcast_event('contractDetails', vars())

    def contractDetailsEnd(self, reqId):
        self.broadcast_event('contractDetailsEnd', vars())

    def bondContractDetails(self, reqId, contractDetails):
        self.broadcast_event('bondContractDetails', vars())

    def execDetails(self, reqId, contract, execution):
        self.broadcast_event('execDetails', vars())

    def execDetailsEnd(self, reqId):
        self.broadcast_event('execDetailsEnd', vars())

    def connectionClosed(self):
        self.broadcast_event('connectionClosed', {})

    def error(self, id=None, errorCode=None, errorMsg=None):
        logging.error(self.serialize_vars_to_dict('error', vars()))
        self.broadcast_event('error', vars())

    def error_0(self, strvalue=None):
        logging.error(self.serialize_vars_to_dict('error_0', vars()))
        self.broadcast_event('error_0', vars())

    def error_1(self, id=None, errorCode=None, errorMsg=None):
        logging.error(self.serialize_vars_to_dict('error_1', vars()))        
        self.broadcast_event('error_1', vars())

    def updateMktDepth(self, tickerId, position, operation, side, price, size):
        self.broadcast_event('updateMktDepth', vars())

    def updateMktDepthL2(self, tickerId, position, marketMaker, operation, side, price, size):
        self.broadcast_event('updateMktDepthL2', vars())

    def updateNewsBulletin(self, msgId, msgType, message, origExchange):
        self.broadcast_event('updateNewsBulletin', vars())

    def managedAccounts(self, accountsList):
        logging.info(self.serialize_vars_to_dict('managedAccounts', vars()))
        self.broadcast_event('managedAccounts', vars())

    def receiveFA(self, faDataType, xml):
        self.broadcast_event('receiveFA', vars())

    def historicalData(self, reqId, date, open, high, low, close, volume, count, WAP, hasGaps):
        self.broadcast_event('historicalData', vars())

    def scannerParameters(self, xml):
        self.broadcast_event('scannerParameters', vars())

    def scannerData(self, reqId, rank, contractDetails, distance, benchmark, projection, legsStr):
        self.broadcast_event('scannerData', vars())


    def commissionReport(self, commissionReport):
        self.broadcast_event('commissionReport', vars())


    def currentTime(self, time):
        self.broadcast_event('currentTime', vars())

    def deltaNeutralValidation(self, reqId, underComp):
        self.broadcast_event('deltaNeutralValidation', vars())


    def fundamentalData(self, reqId, data):
        self.broadcast_event('fundamentalData', vars())

    def marketDataType(self, reqId, marketDataType):
        self.broadcast_event('marketDataType', vars())


    def realtimeBar(self, reqId, time, open, high, low, close, volume, wap, count):
        self.broadcast_event('realtimeBar', vars())

    def scannerDataEnd(self, reqId):
        self.broadcast_event('scannerDataEnd', vars())


    def tickSnapshotEnd(self, reqId):
        self.broadcast_event('tickSnapshotEnd', vars())


    def position(self, account, contract, pos, avgCost):
        self.broadcast_event('position', vars())

    def positionEnd(self):
        self.broadcast_event('positionEnd', vars())

    def accountSummary(self, reqId, account, tag, value, currency):
        self.broadcast_event('accountSummary', vars())

    def accountSummaryEnd(self, reqId):
        self.broadcast_event('accountSummaryEnd', vars())



class TWS_gateway(threading.Thread):

    # config
    config = None
    # redis connection
    rs = None

    
    # channel clients' requests to IB/TWS
    cli_request_handler = None

    # manage conID / contracts mapping
    contract_subscription_mgr = None  
    
    connection = None
    
    # handler to process incoming IB/TWS messages and echo back to clients  
    tws_event_handler = None
    
    # monitor IB connection / heart beat
    ibh = None
    tlock = None
    ib_conn_status = None
    ib_order_transmit = False
    
    
    def __init__(self, host, port, clientId, kafka_host, kafka_port, config):
        super(TWS_gateway, self).__init__()
        self.config = config
        self.host = host
        self.port = port
        self.clientId = clientId
        self.ib_order_transmit = config.get("tws_gateway", "tws_gateway.order_transmit").strip('"').strip("'") if \
                                        config.get("tws_gateway", "tws_gateway.order_transmit").strip('"').strip("'") <> None\
                                        else False
        
        logging.info('starting up TWS_gateway...')
        logging.info('Order straight through (no-touch) flag = %s' % ('True' if self.ib_order_transmit == True else 'False'))
        
        logging.info('connecting to Redis server...')
        self.initialize_redis(config)
        
        logging.info('starting up TWS_event_handler...')
        self.tws_event_handler = TWS_event_handler(kafka_host, kafka_port)
        
        logging.info('starting up IB EClientSocket...')
        self.connection = EClientSocket(self.tws_event_handler)
        
        
        logging.info('starting up client request handler - kafkaConsumer...')
        self.cli_request_handler = KafkaConsumer( *[(v,0) for v in list(TWS_Protocol.topicMethods) + list(TWS_Protocol.gatewayMethods) ], \
                                   metadata_broker_list=['%s:%s' % (kafka_host, kafka_port)],\
                                   group_id = 'epc.tws_gateway',\
                                   auto_commit_enable=True,\
                                   auto_commit_interval_ms=30 * 1000,\
                                   auto_offset_reset='largest') # discard old ones
        
        self.reset_message_offset()
        


        
        


         
        

        if not self.eConnect():
            logging.error('TWS_gateway: unable to establish connection to IB %s:%d' % (self.host, self.port))
            sys.exit(-1)
        else:
            # start heart beat monitor
            logging.info('starting up IB heart beat monitor...')
            self.tlock = Lock()
            self.ibh = IbHeartBeat(config)
            self.ibh.register_listener([self.on_ib_conn_broken])
            self.ibh.run()  


        logging.info('starting up subscription manager...')
        self.initialize_subscription_mgr()



    def initialize_subscription_mgr(self):
        
        self.contract_subscription_mgr = SubscriptionManager(self)
        self.contract_subscription_mgr.register_persistence_callback(self.persist_subscriptions)
        key = self.config.get("tws_gateway",  "subscription_manager.subscriptions.redis_key").strip('"').strip("'")
        if self.rs.get(key):
            #contracts = map(lambda x: ContractHelper.kvstring2contract(x), json.loads(self.rs.get(key)))
            contracts = map(lambda x: ContractHelper.kvstring2object(x, Contract), json.loads(self.rs.get(key)))
            self.contract_subscription_mgr.load_subscription(contracts)
        

    def persist_subscriptions(self, contracts):
         
        key = self.config.get("tws_gateway",  "subscription_manager.subscriptions.redis_key").strip('"').strip("'")
        #cs = json.dumps(map(lambda x: ContractHelper.contract2kvstring(x) if x <> None else None, contracts))
        cs = json.dumps(map(lambda x: ContractHelper.object2kvstring(x) if x <> None else None, contracts))
        logging.debug('Tws_gateway: updating subscription table to redis store %s' % cs)
        self.rs.set(key, cs)


    def initialize_redis(self, config):
        r_host = config.get("redis", "redis.server").strip('"').strip("'")
        r_port = config.get("redis", "redis.port")
        r_db = config.get("redis", "redis.db")     

        self.rs = redis.Redis(r_host, r_port, r_db)
        try:
            self.rs.client_list()
        except redis.ConnectionError:
            logging.error('TWS_gateway: unable to connect to redis server using these settings: %s port:%d db:%d' % (r_host, r_port, r_db))
            logging.error('aborting...')
            sys.exit(-1)
            

    def reset_message_offset(self):
        topic_offsets =  map(lambda topic: (topic, self.cli_request_handler.get_partition_offsets(topic, 0, -1, 999)), TWS_Protocol.topicMethods + TWS_Protocol.gatewayMethods)
        topic_offsets = filter(lambda x: x <> None, map(lambda x: (x[0], x[1][1], x[1][0]) if len(x[1]) > 1 else None, topic_offsets))
        logging.info('TWS_gateway set topic offset to the latest point\n%s' % (''.join('%s,%s,%s\n' % (x[0], x[1], x[2]) for x in topic_offsets)))

        # the set_topic_partitions method clears out all previous settings when executed
        # therefore it's not possible to call the function multiple times:
        # self.consumer.set_topic_partitions(('gw_subscriptions', 0, 114,)
        # self.consumer.set_topic_partitions(('tickPrice', 0, 27270,))
        # as the second call will wipe out whatever was done previously

        self.cli_request_handler.set_topic_partitions(*topic_offsets)
        
        
        



    def run(self):


        for message in self.cli_request_handler:
             
            logging.info("%s:%d:%d: key=%s value=%s" % (message.topic, message.partition,
                                         message.offset, message.key,
                                         message.value))
 
#             print ("TWS_gateway: received client request %s:%d:%d: key=%s value=%s" % (message.topic, message.partition,
#                                          message.offset, message.key,
#                                          message.value))
             

            getattr(self, message.topic, None)(message.value)
            #self.cli_request_handler.task_done(message)


    def on_ib_conn_broken(self, msg):
        logging.error('TWS_gateway: detected broken IB connection!')
        self.ib_conn_status = 'ERROR'
        self.tlock.acquire() # this function may get called multiple times
        try:                 # block until another party finishes executing
            if self.ib_conn_status == 'OK': # check status
                return                      # if already fixed up while waiting, return 
            
            self.eDisconnect()
            self.eConnect()
            while not self.connection.isConnected():
                logging.error('TWS_gateway: attempt to reconnect...')
                self.eConnect()
                sleep(2)
            
            # we arrived here because the connection has been restored
            # resubscribe tickers again!
            logging.info('TWS_gateway: IB connection restored...resubscribe contracts')
            self.contract_subscription_mgr.force_resubscription()             
            
            
        finally:
            self.tlock.release()          
        

    
    def eConnect(self):
        logging.info('TWS_gateway - eConnect. Connecting to %s:%s App Id: %s' % (self.host, self.port, self.clientId))
        self.connection.eConnect(self.host, self.port, self.clientId)
        return self.connection.isConnected()

    
    def reqAccountUpdates(self, value=None):
        logging.info('TWS_gateway - reqAccountUpdates value=%s' % value)
        self.connection.reqAccountUpdates(1, '')

    def reqAccountSummary(self, value):
        logging.info('TWS_gateway - reqAccountSummary value=%s' % value)
        
        vals = map(lambda x: x.encode('ascii') if isinstance(x, unicode) else x, json.loads(value))
        self.connection.reqAccountSummary(vals[0], vals[1], vals[2])
        
    def reqOpenOrders(self, value=None):
        self.connection.reqOpenOrders()

    def reqPositions(self, value=None):
        self.connection.reqPositions()
        
        
    def reqExecutions(self, value):
        try:
            filt = ExecutionFilter() if value == '' else ExecutionFilterHelper.kvstring2object(value, ExecutionFilter)
            self.connection.reqExecutions(0, filt)
        except:
            logging.error(traceback.format_exc())

    
    def reqIds(self, value=None):
        self.connection.reqIds(1)

    
    def reqNewsBulletins(self):
        self.connection.reqNewsBulletins(1)

    
    def cancelNewsBulletins(self):
        self.connection.cancelNewsBulletins()

    
    def setServerLogLevel(self):
        self.connection.setServerLogLevel(3)

    
    def reqAutoOpenOrders(self):
        self.connection.reqAutoOpenOrders(1)

    
    def reqAllOpenOrders(self):
        self.connection.reqAllOpenOrders()

    
    def reqManagedAccts(self):
        self.connection.reqManagedAccts()

    
    def requestFA(self):
        self.connection.requestFA(1)

    
    def reqMktData(self, sm_contract):
        logging.info('TWS Gateway received reqMktData request: %s' % sm_contract)
        try:
            #self.contract_subscription_mgr.reqMktData(ContractHelper.kvstring2contract(sm_contract))
            self.contract_subscription_mgr.reqMktData(ContractHelper.kvstring2object(sm_contract, Contract))
        except:
            pass
    
    def reqHistoricalData(self):
        contract = Contract()
        contract.m_symbol = 'QQQQ'
        contract.m_secType = 'STK'
        contract.m_exchange = 'SMART'
        endtime = strftime('%Y%m%d %H:%M:%S')
        self.connection.reqHistoricalData(
            tickerId=1,
            contract=contract,
            endDateTime=endtime,
            durationStr='1 D',
            barSizeSetting='1 min',
            whatToShow='TRADES',
            useRTH=0,
            formatDate=1)

    
    def placeOrder(self, value=None):
        logging.info('TWS_gateway - placeOrder value=%s' % value)
        try:
            vals = json.loads(value)
        except ValueError:
            logging.error('TWS_gateway - placeOrder Exception %s' % traceback.format_exc())
            return
        
#        c = ContractHelper.kvstring2contract(vals[1])
        o = OrderHelper.kvstring2object(vals[2], Order)
        o.__dict__['transmit'] = self.ib_order_transmit
#         print c.__dict__
#         print o.__dict__
#         print '---------------------'

           
        #self.connection.placeOrder(vals[0], ContractHelper.kvstring2contract(vals[1]), OrderHelper.kvstring2object(vals[2], Order))
        self.connection.placeOrder(vals[0], ContractHelper.kvstring2object(vals[1], Contract), OrderHelper.kvstring2object(vals[2], Order))
#        self.connection.placeOrder(orderId, contract, newOptOrder)
        
    def eDisconnect(self, value=None):
        sleep(2)
        self.connection.eDisconnect()
 
 
####################################################################3
#   Gateway commands
    def gw_req_subscriptions(self, value=None):
        
        #subm = map(lambda i: ContractHelper.contract2kvstring(self.contract_subscription_mgr.handle[i]), range(len(self.contract_subscription_mgr.handle)))
        #subm = map(lambda i: ContractHelper.object2kvstring(self.contract_subscription_mgr.handle[i]), range(len(self.contract_subscription_mgr.handle)))
        subm = map(lambda i: (i, ContractHelper.object2kvstring(self.contract_subscription_mgr.handle[i])), range(len(self.contract_subscription_mgr.handle)))
        
        print subm
        if subm:
            self.tws_event_handler.broadcast_event('gw_subscriptions',  {'subscriptions': subm}, source='GW')
        
class SubscriptionManager():
    
    parent = None
    # array list of contracts
    handle = []
    # contract key map to contract ID (index of the handle array)
    tickerId = {}
    
    persist_f = None
    
    def __init__(self, parent=None):
        self.parent = parent
    
   
    def load_subscription(self, contracts):
        for c in contracts:
            self.reqMktData(c)
            
        self.dump()
    
    # returns -1 if not found, else the key id (which could be a zero value)
    def is_subscribed(self, contract):
        #print self.conId.keys()
        ckey = ContractHelper.makeRedisKeyEx(contract) 
        if ckey not in self.tickerId.keys():
            return -1
        else:
            # note that 0 can be a key 
            # be careful when checking the return values
            # check for true false instead of using implicit comparsion
            return self.tickerId[ckey]
    

#     def reqMktDataxx(self, contract):
#         print '---------------'
#         contractTuple = ('USO', 'STK', 'SMART', 'USD', '', 0.0, '')
#         stkContract = self.makeStkContract(contractTuple)     
#         stkContract.m_includeExpired = False       
#         self.parent.connection.reqMktData(1, stkContract, '', False)     
# 
#         contractTuple = ('IBM', 'STK', 'SMART', 'USD', '', 0.0, '')
#         stkContract = self.makeStkContract(contractTuple)
#         stkContract.m_includeExpired = False
#         print stkContract   
#         print stkContract.__dict__         
#         self.parent.connection.reqMktData(2, stkContract, '', False)     
#             

            
    def reqMktData(self, contract):
                  
        
        #logging.info('SubscriptionManager: reqMktData')
  
        def add_subscription(contract):
            self.handle.append(contract)
            newId = len(self.handle) - 1
            self.tickerId[ContractHelper.makeRedisKeyEx(contract)] = newId 
             
            return newId
  
        id = self.is_subscribed(contract)
        if id == -1: # not found
            id = add_subscription(contract)

            #
            # the conId must be set to zero when calling TWS reqMktData
            # otherwise TWS will fail to subscribe the contract
            self.parent.connection.reqMktData(id, contract, '', False) 
            
                   
#             if self.persist_f:
#                 logging.debug('SubscriptionManager reqMktData: trigger callback')
#                 self.persist_f(self.handle)
                
            logging.info('SubscriptionManager: reqMktData. Requesting market data, id = %d, contract = %s' % (id, ContractHelper.makeRedisKeyEx(contract)))
        
        else:    
            self.parent.connection.reqMktData(1000 + id, contract, '', True)
            logging.info('SubscriptionManager: reqMktData: contract already subscribed. Request snapshot = %d, contract = %s' % (id, ContractHelper.makeRedisKeyEx(contract)))
        #self.dump()
        
#     def makeStkContract(self, contractTuple):
#         newContract = Contract()
#         newContract.m_symbol = contractTuple[0]
#         newContract.m_secType = contractTuple[1]
#         newContract.m_exchange = contractTuple[2]
#         newContract.m_currency = contractTuple[3]
#         newContract.m_expiry = contractTuple[4]
#         newContract.m_strike = contractTuple[5]
#         newContract.m_right = contractTuple[6]
#         print 'Contract Values:%s,%s,%s,%s,%s,%s,%s:' % contractTuple
#         return newContract        
   
    # use only after a broken connection is restored
    # to re request market data 
    def force_resubscription(self):
        # starting from index 1 of the contract list, call  reqmktdata, and format the result into a list of tuples
        for i in range(1, len(self.handle)):
            self.parent.connection.reqMktData(i, self.handle[i], '', False)
            logging.info('force_resubscription: %s' % ContractHelper.printContract(self.handle[i]))
       
            
    def itemAt(self, id):
        if id > 0 and id < len(self.handle):
            return self.handle[id]
        return -1

    def dump(self):
        
        logging.info('subscription manager table:---------------------')
        logging.info(''.join('%d: {%s},\n' % (i,  ''.join('%s:%s, ' % (k, v) for k, v in self.handle[i].__dict__.iteritems() )\
                                     if self.handle[i] <> None else ''          ) for i in range(len(self.handle)))\
                     )
        
        logging.info( ''.join('%s[%d],\n' % (k, v) for k, v in self.conId.iteritems()))
        logging.info( 'Number of instruments subscribed: %d' % len(self.handle))
        logging.info( '------------------------------------------------')
        
    def register_persistence_callback(self, func):
        logging.info('subscription manager: registering callback')
        self.persist_f = func
        

    
        



                
    
def test_subscription():        
    s = SubscriptionManager()
    contractTuple = ('HSI', 'FUT', 'HKFE', 'HKD', '20151029', 0, '')
    c = ContractHelper.makeContract(contractTuple)   
    print s.is_subscribed(c)
    print s.add_subscription(c)
    print s.is_subscribed(c)
    s.dump()
    
    fr = open('/home/larry-13.04/workspace/finopt/data/subscription-hsio.txt')
    for l in fr.readlines():
        if l[0] <> '#':
             
            s.add_subscription(ContractHelper.makeContract(tuple([t for t in l.strip('\n').split(',')])))    
    fr.close()
    s.dump()
    
    fr = open('/home/larry-13.04/workspace/finopt/data/subscription-hsio.txt')
    for l in fr.readlines():
        if l[0] <> '#':
             
            print s.add_subscription(ContractHelper.makeContract(tuple([t for t in l.strip('\n').split(',')])))    
    s.dump()
    contractTuple = ('HSI', 'FUT', 'HKFE', 'HKD', '20151127', 0, '')
    c = ContractHelper.makeContract(contractTuple)   
    print s.is_subscribed(c)
    print s.add_subscription(c)
    print s.is_subscribed(c), ContractHelper.printContract(s.itemAt(s.is_subscribed(c))) 
    
    print 'test itemAt:'
    contractTuple = ('HSI', 'OPT', 'HKFE', 'HKD', '20151127', 21400, 'C')
    c = ContractHelper.makeContract(contractTuple)
    print s.is_subscribed(c), ContractHelper.printContract(s.itemAt(s.is_subscribed(c)))
    
    


    
    
if __name__ == '__main__':
    
    if len(sys.argv) != 2:
        print("Usage: %s <config file>" % sys.argv[0])
        exit(-1)    

    cfg_path= sys.argv[1:]
    config = ConfigParser.SafeConfigParser()
    if len(config.read(cfg_path)) == 0: 
        raise ValueError, "Failed to open config file" 
    
   
      
    logconfig = eval(config.get("tws_gateway", "tws_gateway.logconfig").strip('"').strip("'"))
    logconfig['format'] = '%(asctime)s %(levelname)-8s %(message)s'    
    logging.basicConfig(**logconfig)        
    

    
    
    khost = config.get("epc", "kafka.host").strip('"').strip("'")
    kport = config.get("epc", "kafka.port")
    ihost = config.get("market", "ib.gateway").strip('"').strip("'")
    iport = int(config.get("market", "ib.port"))
    iappid = int(config.get("market", "ib.appid.portfolio"))   
    
    
    
    
    #print 'give kafka server some time to register the topics...'
    #sleep(2)
    
    app = TWS_gateway(ihost, iport, iappid, khost, kport, config)
    app.start()
     
    print 'TWS_gateway started.'
#     


    


#    test_subscription()