def read(self):
read_data = self.socket.recv(BUFFER_SIZE)
if read_data <= 0:
self.close()
return 0
self.read_buffer.append(read_data)
self._read_buffer_size += len(read_data)
self.last_active_time = time.time()
#here is the place where execute the business logic
handler = Handler(self)
handler.execute()
def process(options):
db = Database(user=options.user,
password=options.password,
host=options.host,
port=options.port,
db_name=options.db)
handler = Handler(db)
if options.operation:
try:
result = handler.execute(options)
if result:
print(result)
except KeyError:
print("Unknown operation '{}'".format(options.operation))
def handle_process(self, process, input_process=None):
'''handle the individual process
@params
process - the name of the process to be handled
input_process - the name of the input process that called
this process
'''
# get the handler and instantiate it
handler_class = self.pipeline.get_handler_class(process)
if handler_class:
try:
handler = Common.create_from_class_path(handler_class)
except ImportError:
raise ImportError("Could not import handler class [%s]" % handler_class)
else:
handler = Handler()
# pass the options to the handler
options = self.pipeline.get_action_options(process)
handler.set_options(options)
# pass relevant information to the handler
handler.set_process_name(process)
handler.set_server(self.server)
handler.set_pipeline(self.pipeline)
handler.set_package(self.package)
# if this is the first process (no input process, then the package
# is the input
if not input_process:
output = self.package.copy()
else:
# get input processes and hand over the delivery
input_handler = self.handlers_dict.get(input_process)
if input_handler:
output = input_handler.get_output()
else:
output = {}
# By default, inputs travel through
handler.set_input( output )
handler.set_output( output )
# store the handler and execute
self.handlers.append(handler)
self.handlers_dict[process] = handler
handler.execute()
# process all of the output handlers. First ask the current handler
# for the next process
output_processes = handler.get_next_processes()
# if output processes is None, then stop this branch completely
if output_processes == None:
return
# otherwise, use the pipeline
if not output_processes:
output_processes = self.pipeline.get_output_process_names(process)
for output_process in output_processes:
self.handle_process(output_process, process)
