def addClient(self, cliTrid, destination, clientInitParams, connectParams):
if cliTrid in self.__byClient:
gLogger.fatal("Trid is duplicated!! this shouldn't happen")
return
msgClient = MessageClient(destination, **clientInitParams)
msgClient.subscribeToDisconnect(self.__srvDisconnect)
msgClient.subscribeToAllMessages(self.msgFromSrv)
msgClient.setUniqueName(connectParams[0])
result = msgClient.connect(**connectParams[1])
if not result["OK"]:
return result
self.__inOutLock.acquire()
try:
self.__byClient[cliTrid] = {"srvEnd": msgClient, "srvTrid": msgClient.getTrid(), "srvName": destination}
self.__srvToCliTrid[msgClient.getTrid()] = cliTrid
finally:
self.__inOutLock.release()
return result
def addClient(self, cliTrid, destination, clientInitParams, connectParams):
if cliTrid in self.__byClient:
gLogger.fatal("Trid is duplicated!! this shouldn't happen")
return
msgClient = MessageClient(destination, **clientInitParams)
msgClient.subscribeToDisconnect(self.__srvDisconnect)
msgClient.subscribeToAllMessages(self.msgFromSrv)
msgClient.setUniqueName(connectParams[0])
result = msgClient.connect(**connectParams[1])
if not result["OK"]:
return result
self.__inOutLock.acquire()
try:
self.__byClient[cliTrid] = {"srvEnd": msgClient, "srvTrid": msgClient.getTrid(), "srvName": destination}
self.__srvToCliTrid[msgClient.getTrid()] = cliTrid
finally:
self.__inOutLock.release()
return result
class MindCluster( object ):
def __init__( self, mindName, aliveLock ):
self.__mindName = mindName
self.__modules = {}
self.__maxTasks = 1
self.__reconnectSleep = 1
self.__reconnectRetries = 10
self.__extraArgs = {}
self.__instances = {}
self.__instanceLock = threading.Lock()
self.__aliveLock = aliveLock
def updateMaxTasks( self, mt ):
self.__maxTasks = max( self.__maxTasks, mt )
def addModule( self, name, exeClass ):
self.__modules[ name ] = exeClass
self.__maxTasks = max( self.__maxTasks, exeClass.ex_getOption( "MaxTasks" ) )
self.__reconnectSleep = max( self.__reconnectSleep, exeClass.ex_getOption( "ReconnectSleep" ) )
self.__reconnectRetries = max( self.__reconnectRetries, exeClass.ex_getOption( "ReconnectRetries" ) )
self.__extraArgs[ name ] = exeClass.ex_getExtraArguments()
def connect( self ):
self.__msgClient = MessageClient( self.__mindName )
self.__msgClient.subscribeToMessage( 'ProcessTask', self.__processTask )
self.__msgClient.subscribeToDisconnect( self.__disconnected )
result = self.__msgClient.connect( executorTypes = list( self.__modules.keys() ),
maxTasks = self.__maxTasks,
extraArgs = self.__extraArgs )
if result[ 'OK' ]:
self.__aliveLock.alive()
gLogger.info( "Connected to %s" % self.__mindName )
return result
def __disconnected( self, msgClient ):
retryCount = 0
while True:
gLogger.notice( "Trying to reconnect to %s" % self.__mindName )
result = self.__msgClient.connect( executorTypes = list( self.__modules.keys() ),
maxTasks = self.__maxTasks,
extraArgs = self.__extraArgs )
if result[ 'OK' ]:
if retryCount >= self.__reconnectRetries:
self.__aliveLock.alive()
gLogger.notice( "Reconnected to %s" % self.__mindName )
return S_OK()
retryCount += 1
if retryCount == self.__reconnectRetries:
self.__aliveLock.alive()
gLogger.info( "Connect error failed: %s" % result[ 'Message' ] )
gLogger.notice( "Failed to reconnect. Sleeping for %d seconds" % self.__reconnectSleep )
time.sleep( self.__reconnectSleep )
def __storeInstance( self, modName, modObj ):
self.__instanceLock.acquire()
try:
self.__instances[ modName ].append( modObj )
finally:
self.__instanceLock.release()
def __getInstance( self, moduleName ):
self.__instanceLock.acquire()
try:
if moduleName not in self.__instances:
self.__instances[ moduleName ] = []
try:
return S_OK( self.__instances[ moduleName ].pop( 0 ) )
except IndexError:
pass
finally:
self.__instanceLock.release()
try:
modObj = self.__modules[ moduleName ]
except KeyError:
return S_ERROR( "Unknown %s executor" )
modInstance = modObj()
return S_OK( modInstance )
def __sendExecutorError( self, eType, taskId, errMsg ):
result = self.__msgClient.createMessage( "ExecutorError" )
if not result[ 'OK' ]:
return result
msgObj = result[ 'Value' ]
msgObj.taskId = taskId
msgObj.errorMsg = errMsg
msgObj.eType = eType
return self.__msgClient.sendMessage( msgObj )
def __processTask( self, msgObj ):
eType = msgObj.eType
taskId = msgObj.taskId
taskStub = msgObj.taskStub
result = self.__moduleProcess( eType, taskId, taskStub )
if not result[ 'OK' ]:
return self.__sendExecutorError( eType, taskId, result[ 'Message' ] )
msgName, taskStub, extra = result[ 'Value' ]
result = self.__msgClient.createMessage( msgName )
if not result[ 'OK' ]:
return self.__sendExecutorError( eType, taskId, "Can't generate %s message: %s" % ( msgName, result[ 'Message' ] ) )
gLogger.verbose( "Task %s: Sending %s" % ( str( taskId ), msgName ) )
msgObj = result[ 'Value' ]
msgObj.taskId = taskId
msgObj.taskStub = taskStub
if msgName == "TaskError":
msgObj.errorMsg = extra
msgObj.eType = eType
elif msgName == "TaskFreeze":
msgObj.freezeTime = extra
return self.__msgClient.sendMessage( msgObj )
def __moduleProcess( self, eType, taskId, taskStub, fastTrackLevel = 0 ):
result = self.__getInstance( eType )
if not result[ 'OK' ]:
return result
modInstance = result[ 'Value' ]
try:
result = modInstance._ex_processTask( taskId, taskStub )
except Exception as excp:
gLogger.exception( "Error while processing task %s" % taskId, lException = excp )
return S_ERROR( "Error processing task %s: %s" % ( taskId, excp ) )
self.__storeInstance( eType, modInstance )
if not result[ 'OK' ]:
return S_OK( ( 'TaskError', taskStub, "Error: %s" % result[ 'Message' ] ) )
taskStub, freezeTime, fastTrackType = result[ 'Value' ]
if freezeTime:
return S_OK( ( "TaskFreeze", taskStub, freezeTime ) )
if fastTrackType:
if fastTrackLevel < 10 and fastTrackType in self.__modules:
gLogger.notice( "Fast tracking task %s to %s" % ( taskId, fastTrackType ) )
return self.__moduleProcess( fastTrackType, taskId, taskStub, fastTrackLevel + 1 )
else:
gLogger.notice( "Stopping %s fast track. Sending back to the mind" % ( taskId ) )
return S_OK( ( "TaskDone", taskStub, True ) )
return sendPingMsg( msgObj.msgClient, pongid + 1 )
def disconnectedCB( msgClient ):
"""
Reconnect :)
"""
retryCount = 0
while retryCount:
result = msgClient.connect()
if result[ 'OK' ]:
return result
time.sleep( 1 )
retryCount -= 1
return S_ERROR( "Could not reconnect... :P" )
if __name__ == "__main__":
msgClient = MessageClient( "Framework/PingPong" )
msgClient.subscribeToMessage( 'Pong', pongCB )
msgClient.subscribeToDisconnect( disconnectedCB )
result = msgClient.connect()
if not result[ 'OK' ]:
print("CANNOT CONNECT: %s" % result['Message'])
sys.exit(1)
result = sendPingMsg( msgClient )
if not result[ 'OK' ]:
print("CANNOT SEND PING: %s" % result['Message'])
sys.exit(1)
#Wait 10 secs of pingpongs :P
time.sleep( 10 )
class MindCluster(object):
def __init__(self, mindName, aliveLock):
self.__mindName = mindName
self.__modules = {}
self.__maxTasks = 1
self.__reconnectSleep = 1
self.__reconnectRetries = 10
self.__extraArgs = {}
self.__instances = {}
self.__instanceLock = threading.Lock()
self.__aliveLock = aliveLock
def updateMaxTasks(self, mt):
self.__maxTasks = max(self.__maxTasks, mt)
def addModule(self, name, exeClass):
self.__modules[name] = exeClass
self.__maxTasks = max(self.__maxTasks, exeClass.ex_getOption("MaxTasks", 0))
self.__reconnectSleep = max(self.__reconnectSleep, exeClass.ex_getOption("ReconnectSleep", 0))
self.__reconnectRetries = max(self.__reconnectRetries, exeClass.ex_getOption("ReconnectRetries", 0))
self.__extraArgs[name] = exeClass.ex_getExtraArguments()
def connect(self):
self.__msgClient = MessageClient(self.__mindName)
self.__msgClient.subscribeToMessage("ProcessTask", self.__processTask)
self.__msgClient.subscribeToDisconnect(self.__disconnected)
result = self.__msgClient.connect(
executorTypes=list(self.__modules), maxTasks=self.__maxTasks, extraArgs=self.__extraArgs
)
if result["OK"]:
self.__aliveLock.alive()
gLogger.info("Connected to %s" % self.__mindName)
return result
def __disconnected(self, msgClient):
retryCount = 0
while True:
gLogger.notice("Trying to reconnect to %s" % self.__mindName)
result = self.__msgClient.connect(
executorTypes=list(self.__modules), maxTasks=self.__maxTasks, extraArgs=self.__extraArgs
)
if result["OK"]:
if retryCount >= self.__reconnectRetries:
self.__aliveLock.alive()
gLogger.notice("Reconnected to %s" % self.__mindName)
return S_OK()
retryCount += 1
if retryCount == self.__reconnectRetries:
self.__aliveLock.alive()
gLogger.info("Connect error failed: %s" % result["Message"])
gLogger.notice("Failed to reconnect. Sleeping for %d seconds" % self.__reconnectSleep)
time.sleep(self.__reconnectSleep)
def __storeInstance(self, modName, modObj):
self.__instanceLock.acquire()
try:
self.__instances[modName].append(modObj)
finally:
self.__instanceLock.release()
def __getInstance(self, moduleName):
self.__instanceLock.acquire()
try:
if moduleName not in self.__instances:
self.__instances[moduleName] = []
try:
return S_OK(self.__instances[moduleName].pop(0))
except IndexError:
pass
finally:
self.__instanceLock.release()
try:
modObj = self.__modules[moduleName]
except KeyError:
return S_ERROR("Unknown %s executor")
modInstance = modObj()
return S_OK(modInstance)
def __sendExecutorError(self, eType, taskId, errMsg):
result = self.__msgClient.createMessage("ExecutorError")
if not result["OK"]:
return result
msgObj = result["Value"]
msgObj.taskId = taskId
msgObj.errorMsg = errMsg
msgObj.eType = eType
return self.__msgClient.sendMessage(msgObj)
def __processTask(self, msgObj):
eType = msgObj.eType
taskId = msgObj.taskId
taskStub = msgObj.taskStub
result = self.__moduleProcess(eType, taskId, taskStub)
if not result["OK"]:
return self.__sendExecutorError(eType, taskId, result["Message"])
msgName, taskStub, extra = result["Value"]
result = self.__msgClient.createMessage(msgName)
if not result["OK"]:
return self.__sendExecutorError(
eType, taskId, "Can't generate %s message: %s" % (msgName, result["Message"])
)
gLogger.verbose("Task %s: Sending %s" % (str(taskId), msgName))
msgObj = result["Value"]
msgObj.taskId = taskId
msgObj.taskStub = taskStub
if msgName == "TaskError":
msgObj.errorMsg = extra
msgObj.eType = eType
elif msgName == "TaskFreeze":
msgObj.freezeTime = extra
return self.__msgClient.sendMessage(msgObj)
def __moduleProcess(self, eType, taskId, taskStub, fastTrackLevel=0):
result = self.__getInstance(eType)
if not result["OK"]:
return result
modInstance = result["Value"]
try:
result = modInstance._ex_processTask(taskId, taskStub)
except Exception as excp:
gLogger.exception("Error while processing task %s" % taskId, lException=excp)
return S_ERROR("Error processing task %s: %s" % (taskId, excp))
self.__storeInstance(eType, modInstance)
if not result["OK"]:
return S_OK(("TaskError", taskStub, "Error: %s" % result["Message"]))
taskStub, freezeTime, fastTrackType = result["Value"]
if freezeTime:
return S_OK(("TaskFreeze", taskStub, freezeTime))
if fastTrackType:
if fastTrackLevel < 10 and fastTrackType in self.__modules:
gLogger.notice("Fast tracking task %s to %s" % (taskId, fastTrackType))
return self.__moduleProcess(fastTrackType, taskId, taskStub, fastTrackLevel + 1)
else:
gLogger.notice("Stopping %s fast track. Sending back to the mind" % (taskId))
return S_OK(("TaskDone", taskStub, True))
return sendPingMsg( msgObj.msgClient, pongid + 1 )
def disconnectedCB( msgClient ):
"""
Reconnect :)
"""
retryCount = 0
while retryCount:
result = msgClient.connect()
if result[ 'OK' ]:
return result
time.sleep( 1 )
retryCount -= 1
return S_ERROR( "Could not reconnect... :P" )
if __name__ == "__main__":
msgClient = MessageClient( "Framework/PingPong" )
msgClient.subscribeToMessage( 'Pong', pongCB )
msgClient.subscribeToDisconnect( disconnectedCB )
result = msgClient.connect()
if not result[ 'OK' ]:
print "CANNOT CONNECT: %s" % result[ 'Message' ]
sys.exit(1)
result = sendPingMsg( msgClient )
if not result[ 'OK' ]:
print "CANNOT SEND PING: %s" % result[ 'Message' ]
sys.exit(1)
#Wait 10 secs of pingpongs :P
time.sleep( 10 )