def __init__(self, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32)
#self.data_buffer = Queue.Queue(128)
self.inet_timeout = 0
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.inetBusy = False
self.inetResult = CpInetResult()
self.inetToken = ""
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.route = CpInetDefs.INET_ROUTE
self.sock = None
self.remoteIp = None
self.initialized = False
self.state = CpInetState.CLOSED
self.state_timeout = time.time()
self.exponential_backoff = 30
self.log = CpLog()
self.state_cb = None
#self.data_buffer = ""
threading.Thread.__init__(self)
def __init__(self, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32)
#self.data_buffer = Queue.Queue(128)
self.inet_timeout = 0
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.inetBusy = False
self.inetResult = CpInetResult()
self.inetToken = ""
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.route = CpInetDefs.INET_ROUTE
self.sock = None
self.remoteIp = None
self.initialized = False
self.current_state = CpInetState.INITIALIZE
self.inetError = CpInetError()
self.state_timeout = time.time()
self.exponential_backoff = 30
self.log = CpLog()
self.state_cb = None
self.retries = 1
self.waitRetryBackoff = {1: 5, 2: 15, 3: 30}
#self.waitRetryBackoff = {1:1, 2:2, 3:3} # Test timeouts to speed up testing
self.stateMaxRetries = 3
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.fmap = {
0: self.init_socket,
1: self.inet_idle,
2: self.inet_connect,
3: self.inet_close,
4: self.inet_sleep,
5: self.inet_send,
6: self.inet_waitnetworkinterface
}
threading.Thread.__init__(self)
def __init__(self, printerThread, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32) # Commands for this script to handle
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.sock = None
self.remoteIp = None
self.initialized = False
self.inet_error = CpInetError()
self.log = CpLog()
self.printerID = printerThread.printerID
self.states = CpPrinterStates(self)
self.current_state = self.states.INITIALIZE
# Gradually increasing backoff as more errors occur
self.waitRetryBackoff = [5, 15, 30, 60]
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.printer_command_buffer = "" #stores incomplete printer commands
#An ack isn't expected until a heartbeat is sent
self.heartbeat_ack_pending = False
self.last_heartbeat_time = time.time()
#Contains pending acks for print commands
self.ack_queue = Queue.Queue(128)
self.printerThread = printerThread
threading.Thread.__init__(self)
def __init__(self, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32)
#self.data_buffer = Queue.Queue(128)
self.inet_timeout = 0
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.inetBusy = False
self.inetResult = CpInetResult()
self.inetToken = ""
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.route = CpInetDefs.INET_ROUTE
self.sock = None
self.remoteIp = None
self.initialized = False
self.current_state = CpInetState.INITIALIZE
self.inetError = CpInetError()
self.state_timeout = time.time()
self.exponential_backoff = 30
self.log = CpLog()
self.state_cb = None
self.retries = 1
self.waitRetryBackoff = {1:5, 2:15, 3:30}
#self.waitRetryBackoff = {1:1, 2:2, 3:3} # Test timeouts to speed up testing
self.stateMaxRetries = 3
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.fmap = {0:self.init_socket,
1:self.inet_idle,
2:self.inet_connect,
3:self.inet_close,
4:self.inet_sleep,
5:self.inet_send,
6:self.inet_waitnetworkinterface}
threading.Thread.__init__(self)
def __init__(self, printerThread, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32) # Commands for this script to handle
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.sock = None
self.remoteIp = None
self.initialized = False
self.inet_error = CpInetError()
self.log = CpLog()
self.printerID = printerThread.printerID
self.states = CpPrinterStates(self)
self.current_state = self.states.INITIALIZE
# Gradually increasing backoff as more errors occur
self.waitRetryBackoff = [5, 15, 30, 60]
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.printer_command_buffer = "" #stores incomplete printer commands
#An ack isn't expected until a heartbeat is sent
self.heartbeat_ack_pending = False
self.last_heartbeat_time = time.time()
#Contains pending acks for print commands
self.ack_queue = Queue.Queue(128)
self.printerThread = printerThread
threading.Thread.__init__(self)
class CpInet(threading.Thread):
def __init__(self, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32)
#self.data_buffer = Queue.Queue(128)
self.inet_timeout = 0
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.inetBusy = False
self.inetResult = CpInetResult()
self.inetToken = ""
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.route = CpInetDefs.INET_ROUTE
self.sock = None
self.remoteIp = None
self.initialized = False
self.current_state = CpInetState.INITIALIZE
self.inetError = CpInetError()
self.state_timeout = time.time()
self.exponential_backoff = 30
self.log = CpLog()
self.state_cb = None
self.retries = 1
self.waitRetryBackoff = {1:5, 2:15, 3:30}
#self.waitRetryBackoff = {1:1, 2:2, 3:3} # Test timeouts to speed up testing
self.stateMaxRetries = 3
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.fmap = {0:self.init_socket,
1:self.inet_idle,
2:self.inet_connect,
3:self.inet_close,
4:self.inet_sleep,
5:self.inet_send,
6:self.inet_waitnetworkinterface}
threading.Thread.__init__(self)
def get_queue_depth(self):
return self.commands.qsize()
def get_current_state(self):
return self.lookupStateName(self.current_state)
def get_inet_stats(self):
return self.inet_stats
def setStateChangedCallback(self, callback):
self.state_cb = callback
def lookupStateName(self, index):
if(index == 0):
return "INITIALIZE"
elif(index == 1):
return "IDLE"
elif(index == 2):
return "CONNECT"
elif(index == 3):
return "CLOSE"
elif(index == 4):
return "SLEEP"
elif(index == 5):
return "SEND"
elif(index == 6):
return "WAITNETWORKINTERFACE"
def enter_state(self, new_state, timeout):
self.current_state = new_state
self.STATEFUNC = self.fmap[self.current_state]
self.timestamp = datetime.now()
self.timeout = timeout
#if(CpDefs.LogVerboseInet):
print 'enter_state: (', self.lookupStateName(self.current_state), ')'
# Set the led pattern via state_cb
# Hack if statement to prevent state_cb from being called before
# setStateChangedCallback is set by cptaskmanager
if (self.state_cb == None):
return
else:
self.state_cb(new_state)
def exit_state(self):
self.current_state = 0
self.STATEFUNC = 0
self.timeout = 0.0
def state_timedout(self):
if((datetime.now() - self.timestamp).seconds >= self.timeout):
if(CpDefs.LogVerboseInet):
print 'state_timeout: (', self.lookupStateName(self.current_state), ')'
return True
else:
return False
def reset_state_timeout(self):
self.timestamp = datetime.now()
def inet_handler(self):
if (CpDefs.WatchdogWaitNetworkInterface):
# Start out waiting for network interface
self.enter_state(CpInetState.WAITNETWORKINTERFACE, CpInetTimeout.WAITNETWORKINTERFACE)
else:
# Start out initializing (Use Case for testing without watchdog)
self.enter_state(CpInetState.INITIALIZE, CpInetTimeout.INITIALIZE)
while not self.closing:
if(self.STATEFUNC != 0):
self.STATEFUNC()
time.sleep(.0001)
def run(self):
self._target(*self._args)
def shutdown_thread(self):
print 'shutting down CpInet...'
self.inet_close() # New code added
self.__lock.acquire()
self.closing = True
self.__lock.release()
def init_socket(self):
try:
self.remoteIp = socket.gethostbyname(self.host)
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
if(CpDefs.LogVerboseInet):
print 'init_socket: successful (%s)' %self.remoteIp
self.enter_state(CpInetState.CONNECT, CpInetTimeout.CONNECT)
return True
except socket.gaierror:
self.log.logError('init_socket: failed (hostname could not be resolved)')
print 'init_socket: failed (hostname could not be resolved)'
except:
self.log.logError('init_socket: failed (other)')
print 'init_socket: failed (other)'
# If we get this far we received an error
self.handle_init_socket_error()
return False
def handle_init_socket_error(self):
# ******** BEGIN ERROR HANDLING ********
# If we get this far we received an error
self.inetError.InitializeErrors += 1
# Updated Statistics
self.inet_stats.InitErrors += 1
if (self.inetError.InitializeErrors > self.inetError.InitializeMax):
print 'Max Initialize Errors'
# Reset Error Counter
self.inetError.InitializeErrors = 0
# Handle Max Errors
# TODO: TEST BEFORE PROD
# Check to see if we need to update watchdog
# if not we are in test mode and just want to remain in
# init_socket indefinately
if (CpDefs.WatchdogWaitNetworkInterface):
self.watchdog_set_status(CpWatchdogStatus.Error)
self.enter_state(CpInetState.WAITNETWORKINTERFACE, CpInetTimeout.WAITNETWORKINTERFACE)
return False
# Allow some settle time before trying again
print 'Wait Retry Backoff %d sec.' % self.waitRetryBackoff[self.inetError.InitializeErrors]
time.sleep(self.waitRetryBackoff[self.inetError.InitializeErrors])
# ******** END ERROR HANDLING ********
def inet_connect(self):
try:
self.sock.connect((self.remoteIp, self.port))
# New Code for Timeout
self.sock.settimeout(CpInetDefs.INET_TIMEOUT)
# End New Code for Timeout
if(CpDefs.LogVerboseInet):
print 'inet_connect: successful'
self.enter_state(CpInetState.IDLE, CpInetTimeout.IDLE)
self.watchdog_set_status(CpWatchdogStatus.Success)
return True
except:
self.log.logError('inet_connect: failed')
print 'inet_connect: failed'
# If we get this far we received an error
self.handle_inet_connect_error()
return False
def handle_inet_connect_error(self):
# ******** BEGIN ERROR HANDLING ********
self.inetError.ConnectErrors += 1
# Updated Statistics
self.inet_stats.ConnectErrros += 1
print 'CONNECT FAILED'
if (self.inetError.ConnectErrors > self.inetError.ConnectMax):
# Handle Max Errors
self.inetError.ConnectErrors = 0
self.enter_state(CpInetState.INITIALIZE, CpInetTimeout.INITIALIZE)
return False
# Allow some settle time before trying again
print 'Wait Retry Backoff %d sec.' % self.waitRetryBackoff[self.inetError.ConnectErrors]
time.sleep(self.waitRetryBackoff[self.inetError.ConnectErrors])
# ******** END ERROR HANDLING ********
def inet_send(self):
# Allow the connected state to wait at least 30s before
# going to idle. This will keep us from bouncing between
# idle and connected states thus decreasing latency.
# Reset the timer for each new message
if(self.state_timedout() == True):
self.enter_state(CpInetState.IDLE, CpInetTimeout.IDLE)
return True
if (self.commands.qsize() > 0):
self.reset_state_timeout()
if(CpDefs.LogVerboseInet):
print 'Command found'
packet = self.commands.get(True)
#if(self.inet_send_packet(packet) == True):
result = self.inet_send_packet(packet)
if(result.ResultCode == CpInetResultCode.RESULT_OK):
# Updated Statistics
self.inet_stats.Sent += 1
self.inet_stats.LastSent = time
if(CpDefs.LogVerboseInet):
print 'SEND SUCCESSFUL'
self.commands.task_done()
else:
print 'inet_send error: %s' % result.Data
self.enqueue_packet(packet)
self.handle_inet_send_error()
#print 'tasks in queue %d' % self.commands.qsize()
#print 'error: ResultCode=(%d) Data=%s ' % (result.ResultCode, result.Data)
return True
else:
# Otherwise we have no new messages and the current
# state has not yet timed out so return True in order
# to avoid the error handling
return True
def handle_inet_send_error(self):
# ******** BEGIN ERROR HANDLING ********
self.inetError.SendErrors += 1
# Updated Statistics
self.inet_stats.SendErrors += 1
print 'SEND FAILED'
if (self.inetError.SendErrors > self.inetError.SendMax):
# We have exceeded the maximum allowable attempts so
# close and reinitialize the connection
self.inetError.SendErrors = 0
self.inet_close()
self.enter_state(CpInetState.INITIALIZE, CpInetTimeout.INITIALIZE)
return False
# Allow some settle time before trying again
print 'Wait Retry Backoff %d sec.' % self.waitRetryBackoff[self.inetError.SendErrors]
time.sleep(self.waitRetryBackoff[self.inetError.SendErrors])
# ******** END ERROR HANDLING ********
# inet_send_packet is explicitly called by inet_send
def inet_send_packet(self, packet):
# Setup the HTTP request
postData = CpInetDefs.INET_HTTPPOST % (CpInetDefs.INET_ROUTE, CpInetDefs.INET_HOST, len(packet), packet)
result = CpInetResultCode()
if(CpDefs.LogVerboseInet):
print 'inet_send: (',self.remoteIp, ':', self.port, ')'
print 'inet_send: ', postData
# Send the HTTP request
try:
byteCount = self.sock.send(postData)
except socket.error, e:
result.ResultCode = CpInetResultCode.RESULT_SCKSENDERROR
result.Data = e.args[0]
self.log.logError('inet_send: failed')
print 'inet_send: failed'
return result
# Process the response
try:
reply = self.sock.recv(4096)
except socket.error, e:
err = e.args[0]
if err == 'timed out':
result.ResultCode = CpInetResultCode.RESULT_SCKTIMEOUT
print 'socket timeout exception'
else:
result.ResultCode = CpInetResultCode.RESULT_SCKRECVERROR
result.Data = e.args[0]
self.log.logError('inet_send: failed')
print 'inet_send: failed'
return result
class CpPrinterService(threading.Thread):
def __init__(self, printerThread, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32) # Commands for this script to handle
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.sock = None
self.remoteIp = None
self.initialized = False
self.inet_error = CpInetError()
self.log = CpLog()
self.printerID = printerThread.printerID
self.states = CpPrinterStates(self)
self.current_state = self.states.INITIALIZE
# Gradually increasing backoff as more errors occur
self.waitRetryBackoff = [5, 15, 30, 60]
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.printer_command_buffer = "" #stores incomplete printer commands
#An ack isn't expected until a heartbeat is sent
self.heartbeat_ack_pending = False
self.last_heartbeat_time = time.time()
#Contains pending acks for print commands
self.ack_queue = Queue.Queue(128)
self.printerThread = printerThread
threading.Thread.__init__(self)
def run(self):
self._target(*self._args)
def get_retry_backoff(self, num_errors):
"""
Gets the current retry backoff time based on the
number of errors encountered.
"""
return self.waitRetryBackoff[num_errors % 4]
def enter_state(self, new_state):
"""
Sets the next state to new_state
A call to this will not immediately change state. The next
state will execute upon return from the current state.
"""
self.current_state = new_state
self.STATEFUNC = self.current_state[CpStateKey.FUNCTION]
self.begin_state_time = datetime.now()
self.timeout = self.current_state[CpStateKey.TIMEOUT]
if CpDefs.LogVerboseInet:
print 'enter_state: (', self.current_state[CpStateKey.NAME], ')'
def state_timedout(self):
if (datetime.now() - self.begin_state_time).seconds >= self.timeout:
if CpDefs.LogVerboseInet:
print 'state_timeout: (', self.current_state[
CpStateKey.NAME], ')'
return True
else:
return False
def reset_state_timeout(self):
self.begin_state_time = datetime.now()
def inet_init(self):
try:
self.remoteIp = socket.gethostbyname(self.host)
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
if CpDefs.LogVerboseInet:
print 'inet_init: successful (%s)' % self.remoteIp
self.initialized = True
self.enter_state(self.states.CONNECT)
return True
except socket.gaierror:
self.log.logError(
'inet_init: failed (hostname could not be resolved)')
print 'inet_init: failed (hostname could not be resolved)'
except socket.error, e:
for error in e:
print "error: ", e
self.log.logError('inet_init: failed (other)')
print 'inet_init: failed (other)'
# If we get this far we received an error
self.handle_inet_init_error()
return False
class CpInet(threading.Thread):
def __init__(self, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32)
#self.data_buffer = Queue.Queue(128)
self.inet_timeout = 0
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.inetBusy = False
self.inetResult = CpInetResult()
self.inetToken = ""
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.route = CpInetDefs.INET_ROUTE
self.sock = None
self.remoteIp = None
self.initialized = False
self.state = CpInetState.CLOSED
self.state_timeout = time.time()
self.exponential_backoff = 30
self.log = CpLog()
self.state_cb = None
#self.data_buffer = ""
threading.Thread.__init__(self)
def setStateChangedCallback(self, callback):
self.state_cb = callback
def lookupStateName(self, index):
if(index == 0):
return "INITIALIZED"
elif(index == 1):
return "IDLE"
elif(index == 2):
return "CONNECTED"
elif(index == 3):
return "CLOSED"
elif(index == 4):
return "SLEEP"
elif(index == 5):
return "WAITNETWORKINTERFACE"
def enter_state(self, new_state, timeout):
print 'enter_state: ', self.lookupStateName(new_state)
self.state = new_state
self.state_timeout = time.time() + timeout
def state_timedout(self):
if(time.time() >= self.state_timeout):
print 'state_timeout: (', self.lookupStateName(self.state), ')'
return True
else:
return False
def reset_state_timeout(self, timeout):
print 'reset_state_timeout:'
self.state_timeout = time.time() + timeout
def run(self):
self._target(*self._args)
def shutdown_thread(self):
print 'shutting down CpInet...'
self.inet_close() # New code added
self.__lock.acquire()
self.closing = True
self.__lock.release()
def init_socket(self):
try:
self.remoteIp = socket.gethostbyname(self.host)
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'init_socket: successful (%s)' %self.remoteIp
return True
except socket.gaierror:
self.log.logError('init_socket: failed (hostname could not be resolved)')
print 'init_socket: failed (hostname could not be resolved)'
return False
except:
self.log.logError('init_socket: failed (other)')
print 'init_socket: failed (other)'
return False
def inet_connect(self):
try:
self.sock.connect((self.remoteIp, self.port))
print 'inet_connect: successful'
return True
except:
self.log.logError('inet_connect: failed')
print 'inet_connect: failed'
return False
def inet_send(self, packet):
postData = CpInetDefs.INET_HTTPPOST % (CpInetDefs.INET_ROUTE, CpInetDefs.INET_HOST, len(packet), packet)
print 'inet_send: (',self.remoteIp, ':', self.port, ')'
if CpDefs.LogPacketLevel == True:
print 'inet_send: ', postData
try:
byteCount = self.sock.send(postData)
except socket.error:
self.log.logError('inet_send: failed')
print 'inet_send: failed'
return False
print 'Packet sent successfully %d' % byteCount
reply = self.sock.recv(4096)
#print 'inet_send (reply): ', reply
result = CpInetResultCode()
result = self.inet_parse_result(reply)
if (result.ResultCode == CpInetResultCode.RESULT_OK):
#print 'ResultCode=CpInetResultCode.RESULT_OK'
print 'inet_send: successful'
return True
elif (result.ResultCode == CpInetResultCode.RESULT_ERROR):
#print 'ResultCode=CpInetResultCode.RESULT_ERROR'
self.log.logError('inet_parse_result: %s' % result.Data)
print 'inet_send: failed (error)'
return False
else:
self.log.logError('inet_parse_result: %s' % result.Data)
print 'inet_send: failed (unknown)'
return False
def inet_close(self):
try:
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
print 'inet_close: successful'
return True
except:
self.log.logError('inet_close: failed')
print 'inet_close: failed'
return False
def toggleState(self, state):
if (self.state_cb != None):
self.state_cb(state)
def inet_handler(self):
retry = 0
# Start out closed
self.enter_state(CpInetState.CLOSED, 1)
while not self.closing:
if(self.state == CpInetState.CLOSED):
# Make sure we have established a connection
if(self.init_socket() == True):
self.enter_state(CpInetState.INITIALIZED, 1)
time.sleep(.05)
continue
elif(self.state == CpInetState.INITIALIZED):
self.toggleState(CpSystemState.CONNECT)
if self.inet_connect() == True:
self.enter_state(CpInetState.CONNECTED, 30)
time.sleep(.05)
continue
elif(self.state == CpInetState.CONNECTED):
# Allow the connected state to wait at least 30s before
# going to idle. This will keep us from bouncing between
# idle and connected states thus decreasing latency.
# Reset the timer for each new message
if(self.state_timedout() == True):
self.toggleState(CpSystemState.IDLE)
self.enter_state(CpInetState.IDLE, 30)
continue
if (self.commands.qsize() > 0):
self.toggleState(CpSystemState.SEND)
self.reset_state_timeout(30)
print 'Command found'
packet = self.commands.get(True)
if(self.inet_send(packet) == True):
self.commands.task_done()
else:
# Keep track of send failures
pass
elif(self.state == CpInetState.IDLE):
# Check to see if there is a queued message
if (self.commands.qsize() > 0):
self.enter_state(CpInetState.CONNECTED, 30)
# Check for idle timeout then close connection
if(self.state_timedout() == True):
self.inet_close()
self.toggleState(CpSystemState.SLEEP)
self.enter_state(CpInetState.SLEEP, 60)
pass
elif(self.state == CpInetState.SLEEP):
# Check to see if there is a queued message
if (self.commands.qsize() > 0):
self.enter_state(CpInetState.CLOSED, 1)
continue
# Check to wake send ping once every 60s
if(self.state_timedout() == True):
self.enter_state(CpInetState.CLOSED, 1)
continue
'''
if(self.inet_test() == True ):
tmp_buffer = ""
while not self.closing:
if (self.commands.qsize() > 0):
print 'Command found'
packet = self.commands.get(True)
self.commands.task_done()
self.inet_send(packet)
continue
time.sleep(2)
'''
def enqueue_packet(self, packet):
try:
#self.inetBusy = True
self.commands.put(packet, block=True, timeout=1)
except:
self.__lock.acquire()
print "CpInet commands queue is full"
self.__lock.release()
def set_timeout(self, timeout):
self.inet_timeout = datetime.now() + timeout
def is_timeout(self):
if(datetime.now() >= self.rf_timeout):
return True
else:
return False
'''
def is_error(self, token):
if(token.find(CpInetResponses.TOKEN_HTTPERROR) > -1):
return True
else:
return False
'''
def inet_parse_result(self, result):
inet_result = CpInetResult()
if(result.find(CpInetResponses.TOKEN_HTTPOK) > -1):
inet_result.Data = result
inet_result.ResultCode = CpInetResultCode.RESULT_OK
elif(result.find(CpInetResponses.TOKEN_HTTPERROR) > -1):
inet_result.Data = result
inet_result.ResultCode = CpInetResultCode.RESULT_ERROR
else:
inet_result.Data = result
inet_result.ResultCode = CpInetResultCode.RESULT_UNKNOWN
return inet_result
def inet_test(self):
try:
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.connect((self.remoteIp, self.port))
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
return True
except:
self.log.logError('inet_test:')
return False
class CpInet(threading.Thread):
def __init__(self, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32)
#self.data_buffer = Queue.Queue(128)
self.inet_timeout = 0
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.inetBusy = False
self.inetResult = CpInetResult()
self.inetToken = ""
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.route = CpInetDefs.INET_ROUTE
self.sock = None
self.remoteIp = None
self.initialized = False
self.current_state = CpInetState.INITIALIZE
self.inetError = CpInetError()
self.state_timeout = time.time()
self.exponential_backoff = 30
self.log = CpLog()
self.state_cb = None
self.retries = 1
self.waitRetryBackoff = {1: 5, 2: 15, 3: 30}
#self.waitRetryBackoff = {1:1, 2:2, 3:3} # Test timeouts to speed up testing
self.stateMaxRetries = 3
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.fmap = {
0: self.init_socket,
1: self.inet_idle,
2: self.inet_connect,
3: self.inet_close,
4: self.inet_sleep,
5: self.inet_send,
6: self.inet_waitnetworkinterface
}
threading.Thread.__init__(self)
def get_queue_depth(self):
return self.commands.qsize()
def get_current_state(self):
return self.lookupStateName(self.current_state)
def get_inet_stats(self):
return self.inet_stats
def setStateChangedCallback(self, callback):
self.state_cb = callback
def lookupStateName(self, index):
if (index == 0):
return "INITIALIZE"
elif (index == 1):
return "IDLE"
elif (index == 2):
return "CONNECT"
elif (index == 3):
return "CLOSE"
elif (index == 4):
return "SLEEP"
elif (index == 5):
return "SEND"
elif (index == 6):
return "WAITNETWORKINTERFACE"
def enter_state(self, new_state, timeout):
self.current_state = new_state
self.STATEFUNC = self.fmap[self.current_state]
self.timestamp = datetime.now()
self.timeout = timeout
#if(CpDefs.LogVerboseInet):
print 'enter_state: (', self.lookupStateName(self.current_state), ')'
# Set the led pattern via state_cb
# Hack if statement to prevent state_cb from being called before
# setStateChangedCallback is set by cptaskmanager
if (self.state_cb == None):
return
else:
self.state_cb(new_state)
def exit_state(self):
self.current_state = 0
self.STATEFUNC = 0
self.timeout = 0.0
def state_timedout(self):
if ((datetime.now() - self.timestamp).seconds >= self.timeout):
if (CpDefs.LogVerboseInet):
print 'state_timeout: (', self.lookupStateName(
self.current_state), ')'
return True
else:
return False
def reset_state_timeout(self):
self.timestamp = datetime.now()
def inet_handler(self):
if (CpDefs.WatchdogWaitNetworkInterface):
# Start out waiting for network interface
self.enter_state(CpInetState.WAITNETWORKINTERFACE,
CpInetTimeout.WAITNETWORKINTERFACE)
else:
# Start out initializing (Use Case for testing without watchdog)
self.enter_state(CpInetState.INITIALIZE, CpInetTimeout.INITIALIZE)
while not self.closing:
if (self.STATEFUNC != 0):
self.STATEFUNC()
time.sleep(.0001)
def run(self):
self._target(*self._args)
def shutdown_thread(self):
print 'shutting down CpInet...'
self.inet_close() # New code added
self.__lock.acquire()
self.closing = True
self.__lock.release()
def init_socket(self):
try:
self.remoteIp = socket.gethostbyname(self.host)
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
if (CpDefs.LogVerboseInet):
print 'init_socket: successful (%s)' % self.remoteIp
self.enter_state(CpInetState.CONNECT, CpInetTimeout.CONNECT)
return True
except socket.gaierror:
self.log.logError(
'init_socket: failed (hostname could not be resolved)')
print 'init_socket: failed (hostname could not be resolved)'
except:
self.log.logError('init_socket: failed (other)')
print 'init_socket: failed (other)'
# If we get this far we received an error
self.handle_init_socket_error()
return False
def handle_init_socket_error(self):
# ******** BEGIN ERROR HANDLING ********
# If we get this far we received an error
self.inetError.InitializeErrors += 1
# Updated Statistics
self.inet_stats.InitErrors += 1
if (self.inetError.InitializeErrors > self.inetError.InitializeMax):
print 'Max Initialize Errors'
# Reset Error Counter
self.inetError.InitializeErrors = 0
# Handle Max Errors
# TODO: TEST BEFORE PROD
# Check to see if we need to update watchdog
# if not we are in test mode and just want to remain in
# init_socket indefinately
if (CpDefs.WatchdogWaitNetworkInterface):
self.watchdog_set_status(CpWatchdogStatus.Error)
self.enter_state(CpInetState.WAITNETWORKINTERFACE,
CpInetTimeout.WAITNETWORKINTERFACE)
return False
# Allow some settle time before trying again
print 'Wait Retry Backoff %d sec.' % self.waitRetryBackoff[
self.inetError.InitializeErrors]
time.sleep(self.waitRetryBackoff[self.inetError.InitializeErrors])
# ******** END ERROR HANDLING ********
def inet_connect(self):
try:
self.sock.connect((self.remoteIp, self.port))
# New Code for Timeout
self.sock.settimeout(CpInetDefs.INET_TIMEOUT)
# End New Code for Timeout
if (CpDefs.LogVerboseInet):
print 'inet_connect: successful'
self.enter_state(CpInetState.IDLE, CpInetTimeout.IDLE)
if CpDefs.WatchdogWaitNetworkInterface == True:
self.watchdog_set_status(CpWatchdogStatus.Success)
return True
except:
self.log.logError('inet_connect: failed')
print 'inet_connect: failed'
# If we get this far we received an error
self.handle_inet_connect_error()
return False
def handle_inet_connect_error(self):
# ******** BEGIN ERROR HANDLING ********
self.inetError.ConnectErrors += 1
# Updated Statistics
self.inet_stats.ConnectErrros += 1
print 'CONNECT FAILED'
if (self.inetError.ConnectErrors > self.inetError.ConnectMax):
# Handle Max Errors
self.inetError.ConnectErrors = 0
self.enter_state(CpInetState.INITIALIZE, CpInetTimeout.INITIALIZE)
return False
# Allow some settle time before trying again
print 'Wait Retry Backoff %d sec.' % self.waitRetryBackoff[
self.inetError.ConnectErrors]
time.sleep(self.waitRetryBackoff[self.inetError.ConnectErrors])
# ******** END ERROR HANDLING ********
def inet_send(self):
# Allow the connected state to wait at least 30s before
# going to idle. This will keep us from bouncing between
# idle and connected states thus decreasing latency.
# Reset the timer for each new message
if (self.state_timedout() == True):
self.enter_state(CpInetState.IDLE, CpInetTimeout.IDLE)
return True
if (self.commands.qsize() > 0):
self.reset_state_timeout()
if (CpDefs.LogVerboseInet):
print 'Command found'
packet = self.commands.get(True)
#if(self.inet_send_packet(packet) == True):
result = self.inet_send_packet(packet)
if (result.ResultCode == CpInetResultCode.RESULT_OK):
# Updated Statistics
self.inet_stats.Sent += 1
self.inet_stats.LastSent = time
if (CpDefs.LogVerboseInet):
print 'SEND SUCCESSFUL'
self.commands.task_done()
else:
print 'inet_send error: %s' % result.Data
if CpDefs.InetSendRetry == True:
self.enqueue_packet(packet)
self.handle_inet_send_error()
#print 'tasks in queue %d' % self.commands.qsize()
#print 'error: ResultCode=(%d) Data=%s ' % (result.ResultCode, result.Data)
return True
else:
# Otherwise we have no new messages and the current
# state has not yet timed out so return True in order
# to avoid the error handling
return True
def handle_inet_send_error(self):
# ******** BEGIN ERROR HANDLING ********
self.inetError.SendErrors += 1
# Updated Statistics
self.inet_stats.SendErrors += 1
print 'SEND FAILED'
if (self.inetError.SendErrors > self.inetError.SendMax):
# We have exceeded the maximum allowable attempts so
# close and reinitialize the connection
self.inetError.SendErrors = 0
self.inet_close()
self.enter_state(CpInetState.INITIALIZE, CpInetTimeout.INITIALIZE)
return False
# Allow some settle time before trying again
print 'Wait Retry Backoff %d sec.' % self.waitRetryBackoff[
self.inetError.SendErrors]
time.sleep(self.waitRetryBackoff[self.inetError.SendErrors])
# ******** END ERROR HANDLING ********
# inet_send_packet is explicitly called by inet_send
def inet_send_packet(self, packet):
# Setup the HTTP request
postData = CpInetDefs.INET_HTTPPOST % (
self.route, CpInetDefs.INET_HOST, len(packet), packet)
#postData = CpInetDefs.INET_HTTPPOST % (CpInetDefs.INET_ROUTE, CpInetDefs.INET_HOST, len(packet), packet)
#postData = CpInetDefs.INET_HTTPPOST % (packet.Route, CpInetDefs.INET_HOST, len(packet.Data), packet.Data)
print "PostData: ", postData
result = CpInetResultCode()
if (CpDefs.LogVerboseInet):
print 'inet_send: (', self.remoteIp, ':', self.port, ')'
print 'inet_send: ', postData
# Send the HTTP request
try:
byteCount = self.sock.send(postData)
except socket.error, e:
result.ResultCode = CpInetResultCode.RESULT_SCKSENDERROR
result.Data = e.args[0]
self.log.logError('inet_send: failed')
print 'inet_send: failed'
return result
# Process the response
try:
reply = self.sock.recv(4096)
except socket.error, e:
err = e.args[0]
if err == 'timed out':
result.ResultCode = CpInetResultCode.RESULT_SCKTIMEOUT
print 'socket timeout exception'
else:
result.ResultCode = CpInetResultCode.RESULT_SCKRECVERROR
result.Data = e.args[0]
self.log.logError('inet_send: failed')
print 'inet_send: failed'
return result
while(consoleThread.isAlive()):
time.sleep(.005)
print 'Exiting App...'
exit()
if __name__ == '__main__':
if CpDefs.LogToStdOut == True:
# Route standard out to a log file
log = CpLog()
log.logStdOut()
print "one"
print "two"
print "three"
main(sys.argv[1:])
'''
rfThread = CpRf(rfDataReceived)
rfThread.start()
inetThread = CpInet(inetDataReceived)
inetThread.start()
class CpPrinterService(threading.Thread):
def __init__(self, printerThread, inetResponseCallbackFunc=None, *args):
self._target = self.inet_handler
self._args = args
self.__lock = threading.Lock()
self.closing = False # A flag to indicate thread shutdown
self.commands = Queue.Queue(32) # Commands for this script to handle
self.inetResponseCallbackFunc = inetResponseCallbackFunc
self.host = CpInetDefs.INET_HOST
self.port = CpInetDefs.INET_PORT
self.sock = None
self.remoteIp = None
self.initialized = False
self.inet_error = CpInetError()
self.log = CpLog()
self.printerID = printerThread.printerID
self.states = CpPrinterStates(self)
self.current_state = self.states.INITIALIZE
# Gradually increasing backoff as more errors occur
self.waitRetryBackoff = [5, 15, 30, 60]
self.inet_stats = CpInetStats()
self.inet_stats.LastSent = time
self.printer_command_buffer = "" #stores incomplete printer commands
#An ack isn't expected until a heartbeat is sent
self.heartbeat_ack_pending = False
self.last_heartbeat_time = time.time()
#Contains pending acks for print commands
self.ack_queue = Queue.Queue(128)
self.printerThread = printerThread
threading.Thread.__init__(self)
def run(self):
self._target(*self._args)
def get_retry_backoff(self, num_errors):
"""
Gets the current retry backoff time based on the
number of errors encountered.
"""
return self.waitRetryBackoff[num_errors % 4]
def enter_state(self, new_state):
"""
Sets the next state to new_state
A call to this will not immediately change state. The next
state will execute upon return from the current state.
"""
self.current_state = new_state
self.STATEFUNC = self.current_state[CpStateKey.FUNCTION]
self.begin_state_time = datetime.now()
self.timeout = self.current_state[CpStateKey.TIMEOUT]
if CpDefs.LogVerboseInet:
print 'enter_state: (', self.current_state[CpStateKey.NAME], ')'
def state_timedout(self):
if (datetime.now() - self.begin_state_time).seconds >= self.timeout:
if CpDefs.LogVerboseInet:
print 'state_timeout: (', self.current_state[CpStateKey.NAME], ')'
return True
else:
return False
def reset_state_timeout(self):
self.begin_state_time = datetime.now()
def inet_init(self):
try:
self.remoteIp = socket.gethostbyname(self.host)
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
if CpDefs.LogVerboseInet:
print 'inet_init: successful (%s)' %self.remoteIp
self.initialized = True
self.enter_state(self.states.CONNECT)
return True
except socket.gaierror:
self.log.logError('inet_init: failed (hostname could not be resolved)')
print 'inet_init: failed (hostname could not be resolved)'
except socket.error, e:
for error in e:
print "error: ", e
self.log.logError('inet_init: failed (other)')
print 'inet_init: failed (other)'
# If we get this far we received an error
self.handle_inet_init_error()
return False
