def start(blox_dir, configuration_file_name, log_dir):
global using_engage
try:
sys.path.index(blox_dir)
except ValueError:
sys.path.append(blox_dir)
config = read_configuration(configuration_file_name)
block_version = config["version"] if config.has_key("version") \
else naming.DEFAULT_VERSION
block_class = \
naming.get_block_class(config["name"], block_version)
print "[load_block] Preparing to start block %s" % config["name"]
sys.stdout.flush()
inst = block_class(config["master_port"])
inst.id = config["id"]
inst.log_level = config["log_level"]
# intialize logging
inst.initialize_logging(log_directory=log_dir)
inst.log(logging.DEBUG, config)
try:
#setup policies
if config.has_key("policy"):
setup_policy(inst, config["policy"])
inst.on_load(config["args"])
if is_shard(config["name"]):
num_blocks = config["num_blocks"]
inst.num_nodes = num_blocks
for i in range(num_blocks):
output_port = "output"+str(i)
inst.add_port(output_port, Port.PUSH, Port.UNNAMED, [])
for (port_name, port_config) in config["ports"].items():
port_type, port_nums = port_config[0], port_config[1:]
#TODO: loop does extra work, rewrite this
for port_num in port_nums:
if port_type == "output":
inst.add_output_connection(port_name, port_num)
elif port_type == "input":
inst.add_input_connection(port_name, port_num)
else:
print "Unknown port type " + port_type
raise NameError
#for dynamic join
if config.has_key("subscribers"):
inst.set_subscribers(config["subscribers"])
inst.start()
except Exception, e:
inst.logger.exception("Uncaught exception in block %s: %s" %
(config["name"], e))
raise
def get_block_class(block_name, version=naming.DEFAULT_VERSION): return naming.get_block_class(block_name, version)
