class Flow(Tool):
'''
A Flow-based framework. It executes steps in a sequential or
multiprocess environment.
User defined steps thanks to Python classes, and configuration in a json file
The multiprocess mode is based on ZeroMQ library (http://zeromq.org) to
pass messages between process. ZMQ library allows to stay away from class
concurrency mechanisms like mutexes, critical sections semaphores,
while being process safe. Passing data between steps is managed by the router.
If a step is executed by several process, the router uses LRU pattern
(least recently used ) to choose the step that will receive next data.
The router also manage Queue for each step.
'''
description = 'run stages in multiprocess Flow based framework'
gui = Bool(False, help='send status to GUI').tag(config=True)
gui_address = Unicode('localhost:5565',
help='GUI adress and port').tag(config=True)
mode = Enum(['sequential', 'multiprocess'],
default_vallue='sequential',
help='Flow mode',
allow_none=True).tag(config=True)
producer_conf = Dict(help='producer description: name , module, class',
allow_none=False).tag(config=True)
stagers_conf = List(help='stagers list description in a set order:',
allow_none=False).tag(config=True)
consumer_conf = Dict(default_value={
'name': 'CONSUMER',
'class': 'Producer',
'module': 'producer',
'prev': 'STAGE1'
},
help='producer description: name , module, class',
allow_none=False).tag(config=True)
ports_list = list(range(5555, 5600, 1))
zmq_ports = List(ports_list, help='ZMQ ports').tag(config=True)
aliases = Dict({
'gui_address': 'Flow.gui_address',
'mode': 'Flow.mode',
'gui': 'Flow.gui'
})
examples = ('prompt%> ctapipe-flow \
--config=examples/flow/switch.json')
PRODUCER = 'PRODUCER'
STAGER = 'STAGER'
CONSUMER = 'CONSUMER'
ROUTER = 'ROUTER'
producer = None
consumer = None
stagers = list()
router = None
producer_step = None
stager_steps = None
consumer_step = None
step_process = list()
router_process = None
ports = dict()
def setup(self):
if self.init() is False:
self.log.error('Could not initialise Flow based framework')
exit()
def init(self):
'''
Create producers, stagers and consumers instance according to
configuration
Returns
-------
bool : True if Flow based framework is correctly setup and all producer,stager
and consumer initialised Otherwise False
'''
# Verify configuration instance
if not path.isfile(self.config_file):
self.log.error(
'Could not open Flow based framework config_file {}'.format(
self.config_file))
return False
if not self.generate_steps():
self.log.error("Error during steps generation")
return False
if self.gui:
self.context = zmq.Context()
self.socket_pub = self.context.socket(zmq.PUB)
if not self.connect_gui():
return False
if self.mode == 'sequential':
return self.init_sequential()
elif self.mode == 'multiprocess':
return self.init_multiprocess()
else:
self.log.error("{} is not a valid mode for"
"Flow based framework".format(self.mode))
def init_multiprocess(self):
"""
Initialise Flow for multiprocess mode
Returns
-------
True if every initialisation are correct
Otherwise False
"""
if not self.configure_ports():
return False
if not self.configure_producer():
return False
router_names = self.add_consumer_to_router()
if not self.configure_consumer():
return False
if not self.configure_stagers(router_names):
return False
gui_address = None
if self.gui:
gui_address = self.gui_address
self.router = RouterQueue(connections=router_names,
gui_address=gui_address)
for step in self.stager_steps:
for t in step.process:
self.step_process.append(t)
self.display_conf()
return True
def init_sequential(self):
"""
Initialise Flow for sequential mode
Returns
-------
True if every initialisation are correct
Otherwise False
"""
self.configure_ports()
self.sequential_instances = dict()
# set coroutines
# producer
conf = self.get_step_conf(self.producer_step.name)
module = conf['module']
class_name = conf['class']
try:
coroutine = dynamic_class_from_module(class_name, module, self)
except DynamicClassError as e:
self.log.error('{}'.format(e))
return False
self.producer = ProducerSequential(
coroutine,
name=self.producer_step.name,
connections=self.producer_step.connections,
main_connection_name=self.producer_step.main_connection_name)
self.producer.init()
self.producer_step.process.append(self.producer)
self.sequential_instances[self.producer_step.name] = self.producer
# stages
for step in (self.stager_steps):
conf = self.get_step_conf(step.name)
module = conf['module']
class_name = conf['class']
try:
coroutine = dynamic_class_from_module(class_name, module, self)
except DynamicClassError as e:
self.log.error('{}'.format(e))
return False
stage = StagerSequential(
coroutine,
name=step.name,
connections=step.connections,
main_connection_name=step.main_connection_name)
step.process.append(stage)
self.sequential_instances[step.name] = stage
self.stagers.append(stage)
stage.init()
# consumer
conf = self.get_step_conf(self.consumer_step.name)
module = conf['module']
class_name = conf['class']
try:
coroutine = dynamic_class_from_module(class_name, module, self)
except DynamicClassError as e:
self.log.error('{}'.format(e))
return False
self.consumer = ConsumerSequential(coroutine, name=conf['name'])
self.consumer_step.process.append(self.consumer)
self.consumer.init()
self.sequential_instances[self.consumer_step.name] = self.consumer
self.display_conf()
return True
def configure_stagers(self, router_names):
""" Creates Processes with users's coroutines for all stages
Parameters
----------
router_names: List
List to fill with routers name
Returns
-------
True if every instantiation is correct
Otherwise False
"""
# STAGERS
for stager_step in self.stager_steps:
# each stage need a router to connect it to prev stages
name = stager_step.name + '_' + 'router'
router_names[name] = [
self.ports[stager_step.name + '_in'],
self.ports[stager_step.name + '_out'], stager_step.queue_limit
]
for i in range(stager_step.nb_process):
conf = self.get_step_conf(stager_step.name)
try:
stager_zmq = self.instantiation(
stager_step.name,
self.STAGER,
process_name=stager_step.name + '$$process_number$$' +
str(i),
port_in=stager_step.port_in,
connections=stager_step.connections,
main_connection_name=stager_step.main_connection_name,
config=conf)
except FlowError as e:
self.log.error(e)
return False
self.stagers.append(stager_zmq)
stager_step.process.append(stager_zmq)
return True
def configure_consumer(self):
""" Creates consumer Processes with users's coroutines
Returns
-------
True if every instantiation is correct
Otherwise False
"""
try:
consumer_zmq = self.instantiation(
self.consumer_step.name,
self.CONSUMER,
port_in=self.consumer_step.port_in,
config=self.consumer_conf)
except FlowError as e:
self.log.error(e)
return False
self.consumer = consumer_zmq
return True
def add_consumer_to_router(self):
""" Create router_names dictionary and
Add consumer router ports
Returns
-------
The new router_names dictionary
"""
# ROUTER
router_names = dict()
# each stage need a router to connect it to prev stages
name = self.consumer_step.name + '_' + 'router'
router_names[name] = [
self.ports[self.consumer_step.name + '_in'],
self.ports[self.consumer_step.name + '_out'],
self.consumer_step.queue_limit
]
return router_names
def configure_producer(self):
""" Creates producer Process with users's coroutines
Returns
-------
True if every instatiation is correct
Otherwise False
"""
# PRODUCER
try:
producer_zmq = self.instantiation(
self.producer_step.name,
self.PRODUCER,
connections=self.producer_step.connections,
main_connection_name=self.producer_step.main_connection_name,
config=self.producer_conf)
except FlowError as e:
self.log.error(e)
return False
self.producer = producer_zmq
return True
def connect_gui(self):
""" Connect ZMQ socket to send information to GUI
Returns
-------
True if everything correct
Otherwise False
"""
# Get port for GUI
if self.gui_address is not None:
try:
self.socket_pub.connect('tcp://' + self.gui_address)
except zmq.error.ZMQError as e:
self.log.info(str(e) + 'tcp://' + self.gui_address)
return False
return True
def generate_steps(self):
""" Generate Flow based framework steps from configuration
Returns
-------
True if everything correct
Otherwise False
"""
self.producer_step = self.get_pipe_steps(self.PRODUCER)
self.stager_steps = self.get_pipe_steps(self.STAGER)
self.consumer_step = self.get_pipe_steps(self.CONSUMER)
if not self.producer_step:
self.log.error("No producer in configuration")
return False
if not self.consumer_step:
self.log.error("No consumer in configuration")
return False
return True
def configure_ports(self):
"""
Configures producer, stagers and consumer ZMQ ports
Returns
-------
True if everything correct
Otherwise False
"""
# configure connections (zmq port) for producer (one per next step)
try:
for next_step_name in self.producer_step.next_steps_name:
if not next_step_name + '_in' in self.ports:
self.ports[next_step_name + '_in'] = str(
self.zmq_ports.pop())
self.producer_step.connections[next_step_name] = self.ports[
next_step_name + '_in']
self.producer_step.main_connection_name = (
self.producer_step.next_steps_name[0])
# configure port_in and connections (zmq port)
# for all stages (one per next step)
for stage in self.stager_steps:
if stage.name + '_out' not in self.ports:
self.ports[stage.name + '_out'] = str(self.zmq_ports.pop())
stage.port_in = self.ports[stage.name + '_out']
for next_step_name in stage.next_steps_name:
if next_step_name + '_in' not in self.ports:
self.ports[next_step_name + '_in'] = str(
self.zmq_ports.pop())
stage.connections[next_step_name] = self.ports[
next_step_name + '_in']
stage.main_connection_name = stage.next_steps_name[0]
# configure port-in (zmq port) for consumer
if self.consumer_step.name + '_out' not in self.ports:
self.ports[self.consumer_step.name + '_out'] = str(
self.zmq_ports.pop())
self.consumer_step.port_in = self.ports[self.consumer_step.name +
'_out']
return True
except IndexError as e:
self.log.error("Not enough ZMQ ports. Consider adding some port "
"to configuration.")
except Exception as e:
self.log.error("Could not configure ZMQ ports. {}".format(e))
return False
def get_step_by_name(self, name):
''' Find a PipeStep in self.producer_step or self.stager_steps or
self.consumer_step
Parameters
----------
name : str
step name
Returns
-------
PipeStep if found, otherwise None
'''
for step in (self.stager_steps +
[self.producer_step, self.consumer_step]):
if step.name == name:
return step
return None
def instantiation(self,
name,
stage_type,
process_name=None,
port_in=None,
connections=None,
main_connection_name=None,
config=None):
'''
Instantiate on Python object from name found in configuration
Parameters
----------
name : str
stage name
stage_type : str
process_name : str
port_in : str
step ZMQ port in
connections : dict
key: StepName, value" connection ZMQ ports
main_connection_name : str
main ZMQ connection name. Connexion to use when user not precise
'''
stage = self.get_step_conf(name)
module = stage['module']
class_name = stage['class']
obj = dynamic_class_from_module(class_name, module, self)
if obj is None:
raise FlowError('Cannot create instance of ' + name)
obj.name = name
if stage_type == self.STAGER:
process = StagerZmq(obj,
port_in,
process_name,
connections=connections,
main_connection_name=main_connection_name)
elif stage_type == self.PRODUCER:
process = ProducerZmq(obj,
name,
connections=connections,
main_connection_name=main_connection_name)
elif stage_type == self.CONSUMER:
process = ConsumerZMQ(obj, port_in, name)
else:
raise FlowError('Cannot create instance of', name, '. Type',
stage_type, 'does not exist.')
# set coroutine socket to it's stager or producer socket .
return process
def get_pipe_steps(self, role):
'''
Create a list of Flow based framework steps from configuration and
filter by role
Parameters
----------
role: str
filter with role for step to be add in result list
Accepted values: self.PRODUCER - self.STAGER - self.CONSUMER
Returns
-------
PRODUCER,CONSUMER: a step name filter by specific role (PRODUCER,CONSUMER)
STAGER: List of steps name filter by specific role
'''
# Create producer step
try:
if role == self.PRODUCER:
prod_step = PipeStep(self.producer_conf['name'])
prod_step.type = self.PRODUCER
prod_step.next_steps_name = self.producer_conf[
'next_steps'].split(',')
return prod_step
elif role == self.STAGER:
# Create stagers steps
result = list()
for stage_conf in self.stagers_conf:
try:
nb_process = int(stage_conf['nb_process'])
except Exception:
nb_process = 1
next_steps_name = stage_conf['next_steps'].split(',')
try:
queue_limit = stage_conf['queue_limit']
except Exception:
queue_limit = -1
stage_step = PipeStep(stage_conf['name'],
next_steps_name=next_steps_name,
nb_processes=nb_process,
queue_limit=queue_limit)
stage_step.type = self.STAGER
result.append(stage_step)
return result
elif role == self.CONSUMER:
# Create consumer step
try:
queue_limit = self.consumer_conf['queue_limit']
except:
queue_limit = -1
cons_step = PipeStep(self.consumer_conf['name'],
queue_limit=queue_limit)
cons_step.type = self.CONSUMER
return cons_step
return result
except KeyError:
return None
def def_step_for_gui(self):
'''
Create a list (levels_for_gui) containing all steps
Returns
-------
the created list and actual time
'''
levels_for_gui = list()
levels_for_gui.append(
StagerRep(self.producer_step.name,
self.producer_step.next_steps_name,
nb_job_done=self.producer.nb_job_done,
running=self.producer.running,
step_type=StagerRep.PRODUCER))
for step in self.stager_steps:
nb_job_done = 0
running = 0
if self.mode == 'sequential':
running = step.process[0].running
nb_job_done = step.process[0].nb_job_done
levels_for_gui.append(
StagerRep(step.name,
step.next_steps_name,
nb_job_done=nb_job_done,
running=running,
nb_process=len(step.process)))
elif self.mode == 'multiprocess':
for process in step.process:
nb_job_done += process.nb_job_done
running += process.running
levels_for_gui.append(
StagerRep(process.name,
step.next_steps_name,
nb_job_done=nb_job_done,
running=running,
nb_process=len(step.process)))
levels_for_gui.append(
StagerRep(self.consumer_step.name,
nb_job_done=self.consumer.nb_job_done,
running=self.consumer.running,
step_type=StagerRep.CONSUMER))
return (levels_for_gui, time())
def display_conf(self):
''' Print steps and their next_steps
'''
self.log.info('')
self.log.info(
'------------------ Flow configuration ------------------')
for step in ([self.producer_step] + self.stager_steps +
[self.consumer_step]):
if self.mode == 'multiprocess':
self.log.info('step {} (nb process {}) '.format(
step.name, str(step.nb_process)))
else:
self.log.info('step {}'.format(step.name))
for next_step_name in step.next_steps_name:
self.log.info('--> next {} '.format(next_step_name))
self.log.info(
'------------------ End Flow configuration ------------------')
self.log.info('')
def display_statistics(self):
"""
Log each StagerRep statistic
"""
steps, _ = self.def_step_for_gui()
for step in steps:
self.log.info(step.get_statistics())
def start(self):
""" run the Flow based framework steps
"""
if self.mode == 'multiprocess':
self.start_multiprocess()
elif self.mode == 'sequential':
self.start_sequential()
def start_sequential(self):
""" run the Flow based framework in sequential mode
"""
if self.gui:
self.socket_pub.send_multipart([b'MODE', dumps('sequential')])
start_time = time()
# self.producer.running = 0
# Get producer instance's generator
self.producer = self.sequential_instances[self.producer_step.name]
# execute producer run coroutine
prod_gen = self.producer.run()
# only for gui
if self.gui:
self.producer.running = 1
self.send_status_to_gui()
# for each producer output
for prod_result in prod_gen:
if self.gui:
self.producer.running = 0
self.send_status_to_gui()
# get next stage destination and input from producer output
msg, destination = prod_result
# run each steps until consumer return
if msg is not None:
destination, msg = self.run_generator(destination, msg)
if self.gui:
self.producer.running = 1
self.send_status_to_gui()
if self.gui:
self.consumer.running = 0
self.send_status_to_gui()
# execute finish method for all steps
for step in self.sequential_instances.values():
step.finish()
end_time = time()
self.log.info('=== SEQUENTIAL MODE END ===')
self.log.info('Compute time {} sec'.format(end_time - start_time))
self.display_statistics()
# send finish to GUI and close connections
if self.gui:
self.socket_pub.send_multipart([b'FINISH', dumps('finish')])
self.socket_pub.close()
self.context.destroy()
self.context.term()
def run_generator(self, destination, msg):
""" Get step for destination. Create a genetor from its run method.
re-enter in run_generator until Generator send values
Parameters
----------
destination: str
Next step name
msg: a Pickle dumped msg
Returns
-------
Next destination and msg
"""
stage = self.sequential_instances[destination]
stage.running = 1
if self.gui:
self.send_status_to_gui()
stage_gen = stage.run(msg)
stage.running = 0
if stage_gen:
for result in stage_gen:
if result:
msg, destination = result
destination, msg = self.run_generator(destination, msg)
else:
msg = destination = None
else:
msg = destination = None
return (msg, destination)
def send_status_to_gui(self):
"""
Update all StagerRep status and send them to GUI
"""
self.socket_pub.send_multipart([b'MODE', dumps(self.mode)])
levels_gui, conf_time = self.def_step_for_gui()
self.socket_pub.send_multipart(
[b'GUI_GRAPH', dumps([conf_time, levels_gui])])
def start_multiprocess(self):
''' Start all Flow based framework processes.
Regularly inform GUI of Flow based framework configuration in case of a new GUI
instance was lunch
Stop all processes without loosing data
'''
# send Flow based framework cofiguration to an optinal GUI instance
if self.gui:
self.send_status_to_gui()
start_time = time()
# Start all process
self.consumer.start()
self.router.start()
for stage in self.stagers:
stage.start()
self.producer.start()
# Wait producer end of run method
self.wait_and_send_levels(self.producer)
# Ensure that all queues are empty and all process are waiting for
# new data since more that a specific tine
while not self.wait_all_stagers(1000): # 1000 ms
if self.gui:
self.send_status_to_gui()
sleep(1)
# Now send stop to stage process and wait they join
for worker in self.step_process:
self.wait_and_send_levels(worker)
# Stop consumer and router process
self.wait_and_send_levels(self.consumer)
self.wait_and_send_levels(self.router)
if self.gui:
self.send_status_to_gui()
# Wait 1 s to be sure this message will be display
end_time = time()
self.log.info('=== MULTUPROCESSUS MODE END ===')
self.log.info('Compute time {} sec'.format(end_time - start_time))
self.display_statistics()
sleep(1)
if self.gui:
self.socket_pub.send_multipart([b'FINISH', dumps('finish')])
self.socket_pub.close()
self.context.destroy()
self.context.term()
def wait_all_stagers(self, mintime):
""" Verify id all steps (stage + consumers) are finished their
jobs and waiting
Returns
-------
True if all stages queue are empty and all Processes
wait since mintime
Otherwise False
"""
if self.router.total_queue_size == 0:
for worker in self.step_process:
if worker.wait_since < mintime: # 5000ms
return False
return True
return False
def finish(self):
self.log.info('===== Flow END ======')
def wait_and_send_levels(self, processes_to_wait):
'''
Wait for a process to join and regularly send Flow based framework
state to GUI
in case of a GUI will connect later
Parameters
----------
processes_to_wait : process
process to join
conf_time : str
represents time at which configuration has been built
'''
processes_to_wait.stop = 1
while True:
processes_to_wait.join(timeout=.1)
if self.gui:
self.send_status_to_gui()
if not processes_to_wait.is_alive():
return
def get_step_conf(self, name):
'''
Search step by its name in self.stage_conf list,
self.producer_conf and self.consumer_conf
Parameters
----------
name : str
stage name
Returns
-------
Step name matching instance, or None is not found
'''
if self.producer_conf['name'] == name:
return self.producer_conf
if self.consumer_conf['name'] == name:
return self.consumer_conf
for step in self.stagers_conf:
if step['name'] == name:
return step
return None
def get_stager_indice(self, name):
'''
Search step by its name in self.stage_conf list
Parameters
----------
name : str
stage name
Returns
-------
indice in list, -1 if not found
'''
for index, step in enumerate(self.stagers_conf):
if step['name'] == name:
return index
return -1
class Flow(Tool):
'''
A Flow-based framework. It executes steps in a sequential or
multiprocess environment.
User defined steps thanks to Python classes, and configuration in a json file
The multiprocess mode is based on ZeroMQ library (http://zeromq.org) to
pass messages between process. ZMQ library allows to stay away from class
concurrency mechanisms like mutexes, critical sections semaphores,
while being process safe. Passing data between steps is managed by the router.
If a step is executed by several process, the router uses LRU pattern
(least recently used ) to choose the step that will receive next data.
The router also manage Queue for each step.
'''
description = 'run stages in multiprocess Flow based framework'
gui = Bool(False, help='send status to GUI').tag( config=True)
gui_address = Unicode('localhost:5565', help='GUI adress and port')\
.tag(config=True)
mode = Enum(['sequential','multiprocess'], default_vallue='sequential',
help='Flow mode', allow_none=True).tag(config=True)
producer_conf = Dict(help='producer description: name , module, class',
allow_none=False).tag(config=True)
stagers_conf = List( help='stagers list description in a set order:',
allow_none=False).tag(config=True)
consumer_conf = Dict(
default_value={'name': 'CONSUMER', 'class': 'Producer',
'module': 'producer', 'prev': 'STAGE1'},
help='producer description: name , module, class',
allow_none=False).tag(config=True)
ports_list = list(range(5555,5600,1))
zmq_ports = List(ports_list, help='ZMQ ports').tag(config=True)
aliases = Dict({'gui_address': 'Flow.gui_address',
'mode':'Flow.mode','gui': 'Flow.gui'})
examples = ('prompt%> ctapipe-flow \
--config=examples/flow/switch.json')
PRODUCER = 'PRODUCER'
STAGER = 'STAGER'
CONSUMER = 'CONSUMER'
ROUTER = 'ROUTER'
producer = None
consumer = None
stagers = list()
router = None
producer_step = None
stager_steps = None
consumer_step = None
step_process = list()
router_process = None
ports = dict()
def setup(self):
if self.init() == False:
self.log.error('Could not initialise Flow based framework')
exit()
def init(self):
'''
Create producers, stagers and consumers instance according to
configuration
Returns
-------
bool : True if Flow based framework is correctly setup and all producer,stager
and consumer initialised Otherwise False
'''
# Verify configuration instance
if not path.isfile(self.config_file):
self.log.error('Could not open Flow based framework config_file {}'
.format(self.config_file))
return False
if not self.generate_steps():
self.log.error("Error during steps generation")
return False
if self.gui :
self.context = zmq.Context()
self.socket_pub = self.context.socket(zmq.PUB)
if not self.connect_gui(): return False
if self.mode == 'sequential':
return self.init_sequential()
elif self.mode == 'multiprocess':
return self.init_multiprocess()
else:
self.log.error("{} is not a valid mode for Flow based framework".format(self.mode))
def init_multiprocess(self):
"""
Initialise Flow for multiprocess mode
Returns
-------
True if every initialisation are correct
Otherwise False
"""
if not self.configure_ports() : return False
if not self.configure_producer() : return False
router_names = self.add_consumer_to_router()
if not self.configure_consumer(): return False
if not self.configure_stagers(router_names) : return False
gui_address = None
if self.gui:
gui_address = self.gui_address
self.router = RouterQueue(connections=router_names,
gui_address=gui_address)
for step in self.stager_steps:
for t in step.process:
self.step_process.append(t)
self.display_conf()
return True
def init_sequential(self):
"""
Initialise Flow for sequential mode
Returns
-------
True if every initialisation are correct
Otherwise False
"""
self.configure_ports()
self.sequential_instances = dict()
# set coroutines
#producer
conf = self.get_step_conf(self.producer_step.name)
module = conf['module']
class_name = conf['class']
try:
coroutine = dynamic_class_from_module(class_name, module, self)
except DynamicClassError as e:
self.log.error('{}'.format(e))
return False
self.producer = ProducerSequential(coroutine, name=self.producer_step.name,
connections=self.producer_step.connections,
main_connection_name = self.producer_step.main_connection_name)
self.producer.init()
self.producer_step.process.append(self.producer)
self.sequential_instances[self.producer_step.name] = self.producer
#stages
for step in (self.stager_steps ):
conf = self.get_step_conf(step.name)
module = conf['module']
class_name = conf['class']
try:
coroutine = dynamic_class_from_module(class_name, module, self)
except DynamicClassError as e:
self.log.error('{}'.format(e))
return False
stage = StagerSequential(coroutine,name = step.name, connections=step.connections,
main_connection_name=step.main_connection_name)
step.process.append(stage)
self.sequential_instances[step.name] = stage
self.stagers.append(stage)
stage.init()
#consumer
conf = self.get_step_conf(self.consumer_step.name)
module = conf['module']
class_name = conf['class']
try:
coroutine = dynamic_class_from_module(class_name, module, self)
except DynamicClassError as e:
self.log.error('{}'.format(e))
return False
self.consumer = ConsumerSequential(coroutine, name = conf['name'])
self.consumer_step.process.append(self.consumer)
self.consumer.init()
self.sequential_instances[self.consumer_step.name] = self.consumer
self.display_conf()
return True
def configure_stagers(self,router_names):
""" Creates Processes with users's coroutines for all stages
Parameters
----------
router_names: List
List to fill with routers name
Returns
-------
True if every instantiation is correct
Otherwise False
"""
#STAGERS
for stager_step in self.stager_steps:
# each stage need a router to connect it to prev stages
name = stager_step.name + '_' + 'router'
router_names[name] = [self.ports[stager_step.name+'_in'],
self.ports[stager_step.name+'_out'],
stager_step.queue_limit]
for i in range(stager_step.nb_process):
conf = self.get_step_conf(stager_step.name)
try:
stager_zmq = self.instantiation(stager_step.name,
self.STAGER,
process_name=stager_step.name
+
'$$process_number$$'
+ str(i),
port_in=stager_step.port_in,
connections=stager_step.connections,
main_connection_name=stager_step.main_connection_name,
config=conf)
except FlowError as e:
self.log.error(e)
return False
self.stagers.append(stager_zmq)
stager_step.process.append(stager_zmq)
return True
def configure_consumer(self):
""" Creates consumer Processes with users's coroutines
Returns
-------
True if every instantiation is correct
Otherwise False
"""
try:
consumer_zmq = self.instantiation(self.consumer_step.name,
self.CONSUMER,
port_in=self.consumer_step.port_in,
config=self.consumer_conf)
except FlowError as e:
self.log.error(e)
return False
self.consumer = consumer_zmq
return True
def add_consumer_to_router(self):
""" Create router_names dictionary and
Add consumer router ports
Returns
-------
The new router_names dictionary
"""
# ROUTER
router_names = dict()
# each stage need a router to connect it to prev stages
name = self.consumer_step.name + '_' + 'router'
router_names[name] = [self.ports[self.consumer_step.name+'_in'],
self.ports[self.consumer_step.name+'_out'],
self.consumer_step.queue_limit]
return router_names
def configure_producer(self):
""" Creates producer Process with users's coroutines
Returns
-------
True if every instatiation is correct
Otherwise False
"""
#PRODUCER
try:
producer_zmq = self.instantiation(self.producer_step.name,
self.PRODUCER,
connections=self.producer_step.connections,
main_connection_name=self.producer_step.main_connection_name,
config=self.producer_conf)
except FlowError as e:
self.log.error(e)
return False
self.producer = producer_zmq
return True
def connect_gui(self):
""" Connect ZMQ socket to send information to GUI
Returns
-------
True if everything correct
Otherwise False
"""
# Get port for GUI
if self.gui_address is not None:
try:
self.socket_pub.connect('tcp://' + self.gui_address)
except zmq.error.ZMQError as e:
self.log.info(str(e) + 'tcp://' + self.gui_address)
return False
return True
def generate_steps(self):
""" Generate Flow based framework steps from configuration
Returns
-------
True if everything correct
Otherwise False
"""
self.producer_step = self.get_pipe_steps(self.PRODUCER)
self.stager_steps = self.get_pipe_steps(self.STAGER)
self.consumer_step = self.get_pipe_steps(self.CONSUMER)
if not self.producer_step:
self.log.error("No producer in configuration")
return False
if not self.consumer_step:
self.log.error("No consumer in configuration")
return False
return True
def configure_ports(self):
"""
Configures producer, stagers and consumer ZMQ ports
Returns
-------
True if everything correct
Otherwise False
"""
#configure connections (zmq port) for producer (one per next step)
try:
for next_step_name in self.producer_step.next_steps_name:
if not next_step_name+'_in' in self.ports:
self.ports[next_step_name+'_in'] = str(self.zmq_ports.pop())
self.producer_step.connections[next_step_name]=self.ports[next_step_name+'_in']
self.producer_step.main_connection_name = self.producer_step.next_steps_name[0]
#configure port_in and connections (zmq port) for all stages (one per next step)
for stage in self.stager_steps:
if not stage.name+'_out' in self.ports:
self.ports[stage.name+'_out'] = str(self.zmq_ports.pop())
stage.port_in = self.ports[stage.name+'_out']
for next_step_name in stage.next_steps_name:
if not next_step_name+'_in' in self.ports:
self.ports[next_step_name+'_in'] = str(self.zmq_ports.pop())
stage.connections[next_step_name]=self.ports[next_step_name+'_in']
stage.main_connection_name = stage.next_steps_name[0]
#configure port-in (zmq port) for consumer
if not self.consumer_step.name+'_out' in self.ports:
self.ports[ self.consumer_step.name+'_out'] = str(self.zmq_ports.pop())
self.consumer_step.port_in = self.ports[ self.consumer_step.name+'_out']
return True
except IndexError as e:
self.log.error("Not enough ZMQ ports. Consider adding some port "
"to configuration.")
except Exception as e:
self.log.error("Could not configure ZMQ ports. {}".format(e))
return False
def get_step_by_name(self, name):
''' Find a PipeStep in self.producer_step or self.stager_steps or
self.consumer_step
Parameters
----------
name : str
step name
Returns
-------
PipeStep if found, otherwise None
'''
for step in (self.stager_steps+[self.producer_step,self.consumer_step]):
if step.name == name:
return step
return None
def instantiation(self, name, stage_type, process_name=None, port_in=None,
connections=None, main_connection_name=None, config=None):
'''
Instantiate on Python object from name found in configuration
Parameters
----------
name : str
stage name
stage_type : str
process_name : str
port_in : str
step ZMQ port in
connections : dict
key: StepName, value" connection ZMQ ports
main_connection_name : str
main ZMQ connection name. Connexion to use when user not precise
'''
stage = self.get_step_conf(name)
module = stage['module']
class_name = stage['class']
obj = dynamic_class_from_module(class_name, module, self)
if obj is None:
raise FlowError('Cannot create instance of ' + name)
obj.name = name
if stage_type == self.STAGER:
process = StagerZmq(
obj, port_in, process_name,
connections=connections,
main_connection_name = main_connection_name)
elif stage_type == self.PRODUCER:
process = ProducerZmq(
obj, name, connections=connections,
main_connection_name= main_connection_name)
elif stage_type == self.CONSUMER:
process = ConsumerZMQ(
obj,port_in,
name)
else:
raise FlowError(
'Cannot create instance of', name, '. Type',
stage_type, 'does not exist.')
# set coroutine socket to it's stager or producer socket .
return process
def get_pipe_steps(self, role):
'''
Create a list of Flow based framework steps from configuration and
filter by role
Parameters
----------
role: str
filter with role for step to be add in result list
Accepted values: self.PRODUCER - self.STAGER - self.CONSUMER
Returns
-------
PRODUCER,CONSUMER: a step name filter by specific role (PRODUCER,CONSUMER)
STAGER: List of steps name filter by specific role
'''
# Create producer step
try:
if role == self.PRODUCER:
prod_step = PipeStep(self.producer_conf['name'])
prod_step.type = self.PRODUCER
prod_step.next_steps_name = self.producer_conf['next_steps'].split(',')
return prod_step
elif role == self.STAGER:
# Create stagers steps
result = list()
for stage_conf in self.stagers_conf:
try:
nb_process = int(stage_conf['nb_process'])
except Exception as e:
nb_process = 1
next_steps_name = stage_conf['next_steps'].split(',')
try: queue_limit = stage_conf['queue_limit']
except Exception: queue_limit = -1
stage_step = PipeStep(stage_conf['name'],
next_steps_name=next_steps_name,
nb_processes=nb_process,
queue_limit = queue_limit)
stage_step.type = self.STAGER
result.append(stage_step)
return result
elif role == self.CONSUMER:
# Create consumer step
try: queue_limit = self.consumer_conf['queue_limit']
except: queue_limit = -1
cons_step = PipeStep(self.consumer_conf['name'],queue_limit = queue_limit)
cons_step.type = self.CONSUMER
return cons_step
return result
except KeyError as e:
return None
def def_step_for_gui(self):
'''
Create a list (levels_for_gui) containing all steps
Returns
-------
the created list and actual time
'''
levels_for_gui = list()
levels_for_gui.append(StagerRep(self.producer_step.name,
self.producer_step.next_steps_name,
nb_job_done=self.producer.nb_job_done,
running=self.producer.running,
step_type=StagerRep.PRODUCER))
for step in self.stager_steps:
nb_job_done = 0
running = 0
if self.mode == 'sequential':
running = step.process[0].running
nb_job_done = step.process[0].nb_job_done
levels_for_gui.append(StagerRep(step.name,step.next_steps_name,
nb_job_done=nb_job_done,
running=running,
nb_process = len(step.process)))
elif self.mode == 'multiprocess':
for process in step.process:
nb_job_done+=process.nb_job_done
running += process.running
levels_for_gui.append(StagerRep(process.name,step.next_steps_name,
nb_job_done=nb_job_done,
running=running,
nb_process = len(step.process)))
levels_for_gui.append(StagerRep(self.consumer_step.name,
nb_job_done=self.consumer.nb_job_done,
running=self.consumer.running,
step_type=StagerRep.CONSUMER))
return (levels_for_gui,time())
def display_conf(self):
''' Print steps and their next_steps
'''
self.log.info('')
self.log.info('------------------ Flow configuration ------------------')
for step in ([self.producer_step ] + self.stager_steps
+ [self.consumer_step]):
if self.mode == 'multiprocess':
self.log.info('step {} (nb process {}) '.format(step.name,str(step.nb_process)))
else:
self.log.info('step {}'.format(step.name))
for next_step_name in step.next_steps_name:
self.log.info('--> next {} '.format(next_step_name))
self.log.info('------------------ End Flow configuration ------------------')
self.log.info('')
def display_statistics(self):
"""
Log each StagerRep statistic
"""
steps,_ = self.def_step_for_gui()
for step in steps:
self.log.info(step.get_statistics())
def start(self):
""" run the Flow based framework steps
"""
if self.mode == 'multiprocess':
self.start_multiprocess()
elif self.mode == 'sequential':
self.start_sequential()
def start_sequential(self):
""" run the Flow based framework in sequential mode
"""
if self.gui :
self.socket_pub.send_multipart(
[b'MODE', dumps('sequential')])
start_time = time()
#self.producer.running = 0
# Get producer instance's generator
self.producer = self.sequential_instances[self.producer_step.name]
#execute producer run coroutine
prod_gen = self.producer.run()
# only for gui
if self.gui :
self.producer.running = 1
self.send_status_to_gui()
#for each producer output
for prod_result in prod_gen:
if self.gui :
self.producer.running = 0
self.send_status_to_gui()
# get next stage destination and input from producer output
msg,destination = prod_result
# run each steps until consumer return
while msg != None:
destination, msg=self.run_generator(destination,msg)
if self.gui :
self.producer.running = 1
self.send_status_to_gui()
if self.gui :
self.consumer.running=0
self.send_status_to_gui()
# execute finish method for all steps
for step in self.sequential_instances.values():
step.finish()
end_time = time()
self.log.info('=== SEQUENTIAL MODE END ===')
self.log.info('Compute time {} sec'.format(end_time - start_time))
self.display_statistics()
# send finish to GUI and close connections
if self.gui :
self.socket_pub.send_multipart(
[b'FINISH', dumps('finish')])
self.socket_pub.close()
self.context.destroy()
self.context.term()
def run_generator(self, destination ,msg):
""" Get step for destination. Create a genetor from its run method.
re-enter in run_generator until Generator send values
Parameters
----------
destination: str
Next step name
msg: a Pickle dumped msg
Returns
-------
Next destination and msg
"""
stage = self.sequential_instances[destination]
stage.running = 1
if self.gui : self.send_status_to_gui()
stage_gen = stage.run(msg)
stage.running = 0
if stage_gen:
for result in stage_gen:
if result:
msg,destination = result
destination, msg=self.run_generator(destination,msg)
else:
msg = destination = None
else:
msg = destination = None
return (msg,destination)
def send_status_to_gui(self):
"""
Update all StagerRep status and send them to GUI
"""
self.socket_pub.send_multipart([b'MODE', dumps(self.mode)])
levels_gui,conf_time = self.def_step_for_gui()
self.socket_pub.send_multipart(
[b'GUI_GRAPH', dumps([conf_time,
levels_gui])])
def start_multiprocess(self):
''' Start all Flow based framework processes.
Regularly inform GUI of Flow based framework configuration in case of a new GUI
instance was lunch
Stop all processes without loosing data
'''
# send Flow based framework cofiguration to an optinal GUI instance
if self.gui :
self.send_status_to_gui()
start_time = time()
# Start all process
self.consumer.start()
self.router.start()
for stage in self.stagers:
stage.start()
self.producer.start()
# Wait producer end of run method
self.wait_and_send_levels(self.producer)
# Ensure that all queues are empty and all process are waiting for
# new data since more that a specific tine
while not self.wait_all_stagers(1000): # 1000 ms
if self.gui :
self.send_status_to_gui()
sleep(1)
# Now send stop to stage process and wait they join
for worker in self.step_process:
self.wait_and_send_levels(worker)
# Stop consumer and router process
self.wait_and_send_levels(self.consumer)
self.wait_and_send_levels(self.router)
if self.gui :
self.send_status_to_gui()
# Wait 1 s to be sure this message will be display
end_time = time()
self.log.info('=== MULTUPROCESSUS MODE END ===')
self.log.info('Compute time {} sec'.format(end_time - start_time))
self.display_statistics()
sleep(1)
if self.gui :
self.socket_pub.send_multipart(
[b'FINISH', dumps('finish')])
self.socket_pub.close()
self.context.destroy()
self.context.term()
def wait_all_stagers(self,mintime):
""" Verify id all steps (stage + consumers) are finished their
jobs and waiting
Returns
-------
True if all stages queue are empty and all Processes
wait since mintime
Otherwise False
"""
if self.router.total_queue_size == 0 :
for worker in self.step_process:
if worker.wait_since < mintime: # 5000ms
return False
return True
return False
def finish(self):
self.log.info('===== Flow END ======')
def wait_and_send_levels(self, processes_to_wait):
'''
Wait for a process to join and regularly send Flow based framework
state to GUI
in case of a GUI will connect later
Parameters
----------
processes_to_wait : process
process to join
conf_time : str
represents time at which configuration has been built
'''
processes_to_wait.stop = 1
while True:
processes_to_wait.join(timeout=.1)
if self.gui :
self.send_status_to_gui()
if not processes_to_wait.is_alive():
return
def get_step_conf(self, name):
'''
Search step by its name in self.stage_conf list,
self.producer_conf and self.consumer_conf
Parameters
----------
name : str
stage name
Returns
-------
Step name matching instance, or None is not found
'''
if self.producer_conf['name'] == name:
return self.producer_conf
if self.consumer_conf['name'] == name:
return self.consumer_conf
for step in self.stagers_conf:
if step['name'] == name:
return step
return None
def get_stager_indice(self, name):
'''
Search step by its name in self.stage_conf list
Parameters
----------
name : str
stage name
Returns
-------
indice in list, -1 if not found
'''
for index, step in enumerate(self.stagers_conf):
if step['name'] == name:
return index
return -1