def deploy_service(self, service_name, class_path, pool_size=1,
description=CConstants.UNDEFINED,
initial_state=CConstants.UNDEFINED):
"""Sends request to DPE to deploy given service
Args:
service_name (String): service name in canonical form
class_path (String): class path to given service
pool_size (int): available pool size for service execution
description (String): short description of what the service does
initial_state (String): initial state for service
"""
if not ClaraUtils.is_service_name(service_name):
raise ValueError("Bad Service name")
dpe = ClaraUtils.get_dpe_name(service_name)
container_name = ClaraUtils.get_container_canonical_name(service_name)
engine_name = ClaraUtils.get_engine_name(service_name)
topic = ClaraUtils.build_topic(CConstants.DPE, dpe)
data = ClaraUtils.build_data(CConstants.START_SERVICE,
container_name,
engine_name,
class_path,
pool_size,
description,
initial_state)
self.base.send(self._create_request(topic, data))
def execute_service(self, service_name, user_data):
"""Sends request to Service to execute with given data
Args:
service_name (String): service name in canonical form
user_data (EngineData): engine data parameter for service exec
"""
topic = ClaraUtils.build_topic(CConstants.SERVICE, service_name)
user_data.metadata.action = xMsgMeta.EXECUTE
self.base.send(self.base.serialize(topic, user_data, self.datatypes))
def exit_dpe(self, dpe_name):
"""Sends message to DPE and requesting to stop
Args:
dpe_name (String): name of the dpe to stop
"""
if not ClaraUtils.is_dpe_name(dpe_name):
raise MalformedCanonicalName("Malformed DPE name: %s" % dpe_name)
topic = ClaraUtils.build_topic(CConstants.DPE, dpe_name)
self.base.send(xMsgMessage(topic, CConstants.DPE_EXIT))
def _start(self):
proxy_process = subprocess.Popen(['px_proxy'])
try:
topic = ClaraUtils.build_topic(CConstants.DPE, self.myname)
self.subscription_handler = self.listen(topic, _DpeCallBack(self))
xMsgUtil.keep_alive()
except KeyboardInterrupt:
self._exit()
self.stop_listening(self.subscription_handler)
os.kill(proxy_process.pid, signal.SIGINT)
def configure_service(self, service_name, config_data):
"""Sends configuration request to specified clara service
Args:
service_name (String): service name in canonical form
config_data (EngineData): configuration data
"""
topic = ClaraUtils.build_topic(CConstants.SERVICE, service_name)
config_data.metadata.action = xMsgMeta.CONFIGURE
msg = self.base.serialize(topic, config_data, self.datatypes)
self.base.send(msg)
def exit_container(self, container_name):
"""Sends message to Container and requesting to stop
Args:
container_name (String): name of the container to stop
"""
if not ClaraUtils.is_container_name(container_name):
raise ValueError("Bad Container name")
dpe = ClaraUtils.get_dpe_name(container_name)
name = ClaraUtils.get_container_name(container_name)
topic = ClaraUtils.build_topic(CConstants.DPE, dpe)
data = ClaraUtils.build_data(CConstants.STOP_CONTAINER, name)
self.base.send(self._create_request(topic, data))
def execute_composition(self, composition, input_data):
"""Sends request to Service to execute with given data
Args:
composition (String): service composition for execution
input_data (EngineData): input data parameter for service execution
"""
topic = ClaraUtils.build_topic(CConstants.SERVICE,
composition.first_service())
meta = xMsgMeta()
meta.MergeFrom(input_data.metadata)
meta.action = xMsgMeta.EXECUTE
meta.composition = str(composition)
input_data.metadata = meta
message = self.base.serialize(topic, input_data, self.datatypes)
self.base.send(message)
def remove_service(self, service_name):
"""Sends request to DPE to remove given service
Args:
service_name (String): service name in canonical form
"""
if not ClaraUtils.is_service_name(service_name):
raise ValueError("Bad Service name")
dpe_name = ClaraUtils.get_dpe_name(service_name)
container_name = ClaraUtils.get_container_name(service_name)
engine_name = ClaraUtils.get_engine_name(service_name)
topic = ClaraUtils.build_topic(CConstants.DPE, dpe_name)
data = ClaraUtils.build_data(CConstants.STOP_SERVICE,
container_name,
engine_name)
self.base.send(self._create_request(topic, data))
def deploy_container(self, container_name, pool_size=2,
description="Undefined"):
""" Sends request to DPE to deploy given container
Args:
container_name (String): container name in canonical form
pool_size (int): pool size for the given container
description (String): short description for the container
"""
if not ClaraUtils.is_container_name(container_name):
raise ValueError("Bad Container name")
dpe = ClaraUtils.get_dpe_name(container_name)
name = ClaraUtils.get_container_name(container_name)
topic = ClaraUtils.build_topic(CConstants.DPE, dpe)
data = ClaraUtils.build_data(CConstants.START_CONTAINER,
name, pool_size, description)
self.base.send(self._create_request(topic, data))
def configure_service_done_reporting_start(self, service_name,
event_count):
topic = ClaraUtils.build_topic(CConstants.SERVICE, service_name)
data = ClaraUtils.build_data(ReportType.DONE, str(event_count))
msg = self._create_request(topic, data)
self.base.send(msg)
def _put_engine_data(self, data, receiver):
topic = ClaraUtils.build_topic(CConstants.SERVICE, receiver)
msg = self.serialize(topic, data,
self._engine_object.get_output_data_types())
self._report.increment_bytes_sent(sys.getsizeof(msg))
return msg