def create_keyspaces(replication):
"""
Creates keyspace which AppScale uses for storing application
and user data
Args:
replication: Replication factor for Cassandra
Raises:
AppScaleBadArg: When args are bad
"""
if int(replication) <= 0:
raise dbconstants.AppScaleBadArg(
"Replication must be greater than zero")
print "Creating Cassandra Key Spaces"
# Set this to False to keep data from a previous deployment. Setting it
# it to True will remove previous tables.
_DROP_TABLES = True
# TODO use shared library to get constants
host = helper_functions.read_file('/etc/appscale/my_private_ip')
sysman = system_manager.SystemManager(host + ":" +\
str(cassandra_interface.CASS_DEFAULT_PORT))
if _DROP_TABLES:
try:
sysman.drop_keyspace(cassandra_interface.KEYSPACE)
except pycassa.cassandra.ttypes.InvalidRequestException, e:
pass
def main():
parser = argparse.ArgumentParser()
parser.add_argument("file_name", help="Enter input file name", type=str)
args = parser.parse_args()
yes_exs, no_exs, attributes = read_file(args.file_name)
root = Node(yes_exs, no_exs)
build_decision_tree(root, yes_exs, no_exs, attributes, yes_exs,
no_exs) # expand the decision tree
print_tree(root)
print("number of nodes is: {}".format(count_nodes(root)))
print("training_set_accuracy is: {:.2%}".format(
training_set_accuracy(yes_exs, no_exs, root)))
run_cross_val = input(
"Do you want to run leave-one-out cross-validation (y/n)? ")
if run_cross_val == 'y':
print("test_set_accuracy is: {:.2%}".format(
test_set_accuracy(yes_exs, no_exs, attributes)))
elif run_cross_val != 'n':
print("Invalid input! Please enter either 'y' or 'n'.")
def create_keyspaces(replication):
"""
Creates keyspace which AppScale uses for storing application
and user data
Args:
replication: Replication factor for Cassandra
Raises:
AppScaleBadArg: When args are bad
"""
if int(replication) <= 0:
raise dbconstants.AppScaleBadArg("Replication must be greater than zero")
print "Creating Cassandra Key Spaces"
# Set this to False to keep data from a previous deployment. Setting it
# it to True will remove previous tables.
_DROP_TABLES = True
# TODO use shared library to get constants
host = helper_functions.read_file('/etc/appscale/my_private_ip')
sysman = system_manager.SystemManager(host + ":" +\
str(cassandra_interface.CASS_DEFAULT_PORT))
if _DROP_TABLES:
try:
sysman.drop_keyspace(cassandra_interface.KEYSPACE)
except pycassa.cassandra.ttypes.InvalidRequestException, e:
pass
def __init__(self, logger = appscale_logger.getLogger("datastore-hypertable")):
""" Constructor
Args:
logger: Object where log messages are sent
"""
self.logger = logger
self.host = helper_functions.read_file(
APPSCALE_HOME + '/.appscale/my_private_ip')
self.conn = thriftclient.ThriftClient(self.host, THRIFT_PORT)
self.ns = self.conn.namespace_open(NS)
def __init__(self,
logger=appscale_logger.getLogger("datastore-hypertable")):
""" Constructor
Args:
logger: Object where log messages are sent
"""
self.logger = logger
self.host = helper_functions.read_file(APPSCALE_HOME +
'/.appscale/my_private_ip')
self.conn = thriftclient.ThriftClient(self.host, THRIFT_PORT)
self.ns = self.conn.namespace_open(NS)
def create_connection(self):
""" Creates a connection to HBase's Thrift to the local node.
Returns:
An HBase client object
"""
host = helper_functions.read_file('/etc/appscale/my_private_ip')
t = TSocket.TSocket(host, THRIFT_PORT)
t = TTransport.TBufferedTransport(t)
p = TBinaryProtocol.TBinaryProtocol(t)
c = Hbase.Client(p)
t.open()
return c
def __init__(self, logger = appscale_logger.getLogger("datastore-cassandra")):
"""
Constructor
Args:
logger: An object that logging messages can be sent to
"""
self.host = helper_functions.read_file(APPSCALE_HOME + \
'/.appscale/my_private_ip')
self.port = CASS_DEFAULT_PORT
self.pool = pycassa.ConnectionPool(keyspace=KEYSPACE,
server_list=[self.host+":"+str(self.port)],
prefill=False)
self.logger = logger
def __init__(self,
logger=appscale_logger.getLogger("datastore-cassandra")):
"""
Constructor
Args:
logger: An object that logging messages can be sent to
"""
self.host = helper_functions.read_file(APPSCALE_HOME + \
'/.appscale/my_private_ip')
self.port = CASS_DEFAULT_PORT
self.pool = pycassa.ConnectionPool(
keyspace=KEYSPACE,
server_list=[self.host + ":" + str(self.port)],
prefill=False)
self.logger = logger
