def main():
connection.setup([DB_URL], DB_NAME)
table_name = sys.argv[1]
columns = [column.split('=') for column in sys.argv[2:]]
print(select(table_name, columns))
def open_cassandra_session():
setup_env()
connection.setup([CASSANDRA_CONFIG['ip']], CASSANDRA_CONFIG['keyspace'], protocol_version=3)
SourceUserEntity.sync_table()
RawRecentMediaEntity.sync_table()
RawUserEntity.sync_table()
RawUserRecentMediaEntity.sync_table()
def get_new_connection(self, connection_settings):
contact_points = connection_settings.pop(
'contact_points',
self.default_settings['CONTACT_POINTS']
)
keyspace = connection_settings.pop(
'keyspace',
self.settings_dict['DEFAULT_KEYSPACE']
)
self.keyspace = keyspace
self.session = connection.get_session()
if not(self.session is None or self.session.is_shutdown):
return CassandraCursor(self.session)
connection.setup(
contact_points,
keyspace,
**connection_settings
)
self.cluster = connection.get_cluster()
self.session = connection.get_session()
return CassandraCursor(self.session)
def main():
if len(sys.argv) < 2:
print('There is no query')
sys.exit()
query = sys.argv[1]
if query == 'docs':
print(get_docs())
print('=====')
return
connection.setup([DB_URL], DB_NAME)
schema = graphene.Schema(query = FirstQuery, mutation = FirstMutation)
'''
query MyFirstQuery {
position(hour : 20, second : 12){
x,
y,
speed,
time,
date
}
}
'''
print(json.dumps(schema.execute(query).data, indent = 4, sort_keys = True))
print('=====')
def get_new_connection(self, connection_settings):
contact_points = connection_settings.pop(
'contact_points',
self.default_settings['CONTACT_POINTS']
)
keyspace = connection_settings.pop(
'keyspace',
self.settings_dict['DEFAULT_KEYSPACE']
)
self.keyspace = keyspace
try:
connection.get_connection()
except CQLEngineException:
connection.setup(
contact_points,
keyspace,
**connection_settings
)
self.session = connection.get_session()
self.cluster = connection.get_cluster()
self.session.default_timeout = None # Should be in config.
return CassandraCursor(self.session)
def setup_connection():
connection.setup(
hosts=settings.STREAM_CASSANDRA_HOSTS,
consistency=settings.STREAM_CASSANDRA_CONSISTENCY_LEVEL,
default_keyspace=settings.STREAM_DEFAULT_KEYSPACE,
**settings.CASSANDRA_DRIVER_KWARGS
)
def main(): connection.setup([DB_URL], DB_NAME) #fill_position() #fill_system_test() #fill_control_action() #fill_sensor_data() fill_shift_state()
def __init__(self):
self.key_space = "cancer_app"
connection.setup(["127.0.0.1"], self.key_space, protocol_version=3)
sync_table(CancerDataEntity)
sync_table(CancerGenderDeathsEntity)
sync_table(CancerDeathsEntity)
sync_table(CancerAgeDeathsEntity)
sync_table(CancerAgeGenderRiskEntity)
def main():
connection.setup([DB_URL], DB_NAME)
table_name = sys.argv[1]
columns_getter = [column.split('=') for column in (item for item in sys.argv[2:] if item.find('->') < 0)]
columns_setter = [column.split('->') for column in (item for item in sys.argv[2:] if item.find('=') < 0)]
print(update(table_name, columns_getter, columns_setter))
def main(): connection.setup([DB_URL], DB_NAME) sync_table(SystemTest) sync_table(ControlAction) sync_table(Position) sync_table(SensorData) sync_table(ShiftState) sync_table(OperationState)
def setup(self):
from cassandra.cqlengine import connection
if connection.cluster is not None:
# already connected
return
for option, value in self.session_options.items():
setattr(Session, option, value)
connection.setup(self.hosts, self.keyspace, **self.connection_options)
def portfolio_stat():
# Connect to Cassandra
connection.setup(cassandra_configs['ips'], cassandra_configs['keyspace'])
# Get data from Cassandra as serializable dictionaries
asset_stat = list(map(dict, PortfolioStat.objects.all()))
# Serve JSON on API endpoint
return jsonify(asset_stat)
def fill_model(keyspace, brand):
connection.setup(['127.0.0.1'], keyspace)
beerometer = BeerometerModel.create(
brand=brand,
created_at=datetime.datetime.now()
)
return beerometer.to_dict()
def get_data(request):
content = request.get_json()
connection.setup(CASSANDRA_HOSTS, content[ORG])
obj = eval(
content[TABLE]).objects.filter(**(content[BODY])).allow_filtering()
obj_list = []
for o in obj:
obj_list.append(dict(o))
return jsonify(obj_list)
def setup(self):
from cassandra.cqlengine import connection
if connection.cluster is not None:
# already connected
return
connection.setup(self.hosts, self.keyspace, **self.connection_options)
for option, value in self.session_options.items():
setattr(self.session, option, value)
def __init__(self,
hosts,
keyspace='gunregistry',
replication_factor=1,
**cqlengine_params):
self.keyspace = keyspace
connection.setup(hosts, keyspace, **cqlengine_params)
create_keyspace_simple(keyspace, replication_factor)
sync_table(Record)
def connect(self, host, port, keyspace='events'):
""" Connect with specific host & port """
connection.setup([
host,
], "cqlengine", protocol_version=3)
self._db_connection = Cluster([
host,
])
self._db_cur = self._db_connection.connect(keyspace=keyspace)
def connect(self):
cluster = Cluster()
self.session = cluster.connect()
connection.setup(["127.0.0.1"], "dataanalysis")
drop_table(User)
sync_table(User)
user = User.create(username="******", created_at=datetime.now())
logging.info("Connected to cluster.")
print "Sucessfully connected."
def main():
connection.setup([DB_URL], DB_NAME)
sync_table(SystemTest)
sync_table(ControlAction)
sync_table(Position)
sync_table(SensorData)
sync_table(ShiftState)
sync_table(OperationState)
def reset_db():
print('Connecting to cluster')
connection.setup(['127.0.0.1'], 'system', protocol_version=3)
print('Dropping existing keyspace')
drop_keyspace(db_keyspace)
print('Creating keyspace for project')
create_keyspace_simple(db_keyspace,
replication_factor=replication_factor)
sync_all_tables()
def create_event_data_table():
try:
setup(['127.0.0.1'], 'sparkifydb', retry_connect=True)
sync_table(model.table.EventDataModel)
sync_table(model.table.UserAndSessionModel)
sync_table(model.table.UserAndSongModel)
except Exception as e:
print(e)
exit(1)
def init_database(cluster, keyspace, db_user, db_pass):
try:
auth_provider = PlainTextAuthProvider(username=db_user,
password=db_pass)
connection.setup(cluster, keyspace, auth_provider=auth_provider)
sync_table(User)
sync_table(Tweet)
sync_table(Relation)
except Exception:
raise
def get_all_data(request):
content = request.get_json()
connection.setup(CASSANDRA_HOSTS, content[ORG])
obj = eval(content[TABLE]).objects.all()
obj_list = []
for o in obj:
obj_list.append(dict(o))
if content[START_ID]:
return jsonify(obj_list[int(content[START_ID]):int(content[END_ID])])
return jsonify(obj_list)
def __init__(self, mongo_conf, cass_conf, neo_conf):
#Create mongo client
self.mongo_client = MongoClient(mongo_conf['host'], mongo_conf['port'])
#Setup default connection to cassandra cluster
connection.setup([cass_conf['host']],
cass_conf['default_keyspace'],
protocol_version=3)
#setup connection to neo4j database
self.graph = None #Neo client graph
self.setup_neo(neo_conf)
def post(self):
data = request.get_json(silent=True)
sender_id = data.get('user_id')
audience = data.get('audience', Audience.DIRECT)
receiver_id = data.get('receiver_id', [])
asset = data.get('asset', {})
message = data.get('message')
if not sender_id:
return make_response("Missing field user_id", 500)
if not audience:
response_message = "Must specify the audience. Audience can be: " + Audience.DIRECT + ", " \
+ Audience.FRIENDS + ", " + Audience.PUBLIC
return make_response(response_message, 500)
if audience == Audience.DIRECT:
receiver_ids = [receiver_id]
if audience == Audience.FRIENDS:
receiver_ids = self._get_friends(sender_id)
if asset and (not asset.get('asset_name')):
return make_response("Must specify asset.asset_name", 500)
asset_name = asset.get('asset_name')
# public not implemented yet
connection.setup(hosts=CASSANDRA_HOSTS,
default_keyspace=MESSAGE_KEYSPACE)
for receiver_id in receiver_ids:
MessageByReceiver.create(receiver_id=receiver_id,
sender_id=sender_id,
audience=audience,
message=message,
asset_name=asset_name)
MessageBySender.create(receiver_id=receiver_id,
sender_id=sender_id,
audience=audience,
message=message,
asset_name=asset_name)
message_object = {
"receiver_id": receiver_id,
"sender_id": sender_id,
"audience": audience,
"message": message,
"asset_name": asset_name
}
self._message_sent(message_object)
return {"success": True}
def __init__(self,
host=['127.0.0.1'],
keyspace='apscheduler',
tablename_jobs='apscheduler_jobs',
tablename_scheduler='apscheduler_scheduler',
pickle_protocol=pickle.HIGHEST_PROTOCOL,
**connect_args):
super(CassandraJobStore, self).__init__()
self.utc = pytz.utc
self.keyspace = keyspace
self.tablename_jobs = tablename_jobs
self.tablename_scheduler = tablename_scheduler
self.pickle_protocol = pickle_protocol
connection.setup(host, keyspace, **connect_args)
self.conn = connection.session
class APSchedulerJobs(Model):
id = columns.UUID(partition_key=True)
year = columns.Integer(primary_key=True)
month = columns.Integer(primary_key=True)
day = columns.Integer(primary_key=True)
hour = columns.Integer(primary_key=True)
next_run_time = columns.DateTime()
job_state = columns.Blob()
APSchedulerJobs.__keyspace__ = self.keyspace
APSchedulerJobs.__table_name__ = self.tablename_jobs
class APSchedulerSchedule(Model):
year = columns.Integer(partition_key=True)
month = columns.Integer(partition_key=True)
day = columns.Integer(partition_key=True)
hour = columns.Integer(partition_key=True)
next_run_time = columns.DateTime(primary_key=True)
id = columns.UUID(primary_key=True)
job_state = columns.Blob(required=True)
APSchedulerSchedule.__keyspace__ = self.keyspace
APSchedulerSchedule.__table_name__ = self.tablename_scheduler
self.jobs_t = APSchedulerJobs
self.sched_t = APSchedulerSchedule
sync_table(self.jobs_t)
# insert materialized view
mv = (
"CREATE MATERIALIZED VIEW IF NOT EXISTS {0}.{1} AS " +
"SELECT * " + "FROM {2} " +
"WHERE year IS NOT NULL and month IS NOT NULL and day IS NOT NULL and hour IS NOT NULL and "
+ "next_run_time IS NOT NULL and id IS NOT NULL " +
"PRIMARY KEY((year, month, day, hour), next_run_time, id);")
self.conn.execute(
mv.format(self.keyspace, self.tablename_scheduler,
self.tablename_jobs))
def connect(self):
# Close existing clusters and sessions first
if self.check_active:
if connection.cluster and not connection.cluster.is_shutdown:
connection.cluster.shutdown()
if connection.session and not connection.session.is_shutdown:
connection.session.shutdown()
# Get fresh connection
connection.setup(self.nodes, self.keyspace)
connection.cluster.row_factory = dict_factory
connection.cluster.client_protocol_handler = NumpyProtocolHandler
def connect_cassandra(role):
auth_provider = PlainTextAuthProvider(username=str(role),
password=str(role))
connection.setup(['127.0.0.1'],
"sensors",
auth_provider=auth_provider,
protocol_version=3)
sync_table(Users)
sync_table(TemperatureSensor)
sync_table(PressureSensor)
return True
def create_connection(use_gevent: bool = False) -> None:
"""Create a Session object for above Cluster."""
connection_class = GeventConnection if use_gevent else AsyncoreConnection
connection.setup(addresses,
MEDTAGGER_KEYSPACE,
port=port,
load_balancing_policy=RoundRobinPolicy(),
connection_class=connection_class,
connect_timeout=connect_timeout)
session = connection.get_session()
session.default_timeout = default_timeout
def setup_tables(self):
key_space = self.env.config.get(ConfigKeys.KEY_SPACE,
domain=ConfigKeys.STORAGE)
hosts = self.env.config.get(ConfigKeys.HOST, domain=ConfigKeys.STORAGE)
hosts = hosts.split(",")
# required to specify execution profiles in future versions
profiles = {
# override the default so we can set consistency level later
EXEC_PROFILE_DEFAULT:
ExecutionProfile(
load_balancing_policy=TokenAwarePolicy(
DCAwareRoundRobinPolicy()),
retry_policy=RetryPolicy(),
request_timeout=10.0,
row_factory=Session._row_factory, # noqa
# should probably be changed to QUORUM when having more than 3 nodes in the cluster
consistency_level=ConsistencyLevel.LOCAL_ONE,
),
# TODO: there doesn't seem to be a way to specify execution profile when
# using the library's object mapping approach, only when writing pure
# cql queries:
# https://docs.datastax.com/en/developer/python-driver/3.24/execution_profiles/
# batch profile has longer timeout since they are run async anyway
"batch":
ExecutionProfile(
load_balancing_policy=TokenAwarePolicy(
DCAwareRoundRobinPolicy()),
request_timeout=120.0,
consistency_level=ConsistencyLevel.LOCAL_ONE,
)
}
kwargs = {
"default_keyspace": key_space,
"protocol_version": 3,
"retry_connect": True,
"execution_profiles": profiles,
}
username = self._get_from_conf(ConfigKeys.USER, ConfigKeys.STORAGE)
password = self._get_from_conf(ConfigKeys.PASSWORD, ConfigKeys.STORAGE)
if password is not None:
auth_provider = PlainTextAuthProvider(
username=username,
password=password,
)
kwargs["auth_provider"] = auth_provider
connection.setup(hosts, **kwargs)
sync_table(MessageModel)
sync_table(AttachmentModel)
def create_cass_keyspace(cls):
"""
Create Cassandra's testing keyspace.
CE Cassandra doesn't currently have in-memory DBs, so we can't just use
the factory like we do in SQL.
"""
connection.setup(TESTING_IPS, INITIAL_KEYSPACE_NAME)
# Make sure the keyspace is empty
cls.teardown_cass_keyspace()
management.create_keyspace_simple(TEMP_KEYSPACE_NAME, 1)
def test_legacy_insert_query(self):
connection.setup(hosts=[CASSANDRA_IP],
default_keyspace=DEFAULT_KEYSPACE,
consistency=ConsistencyLevel.LOCAL_ONE)
self.assertEqual(connection.get_connection().cluster._config_mode,
_ConfigMode.LEGACY)
sync_table(ConnectionModel)
ConnectionModel.objects.create(key=0, some_data='text0')
ConnectionModel.objects.create(key=1, some_data='text1')
self.assertEqual(ConnectionModel.objects(key=0)[0].some_data, 'text0')
def connect():
"""Connect to Cassandra database."""
try:
connection.setup([core.configuration['database']['host']],
core.configuration['database']['keyspace'])
log.info('Connected to Cassandra database!')
except CQLEngineException:
raise DatabaseConnectionError(
'Cannot connect to Cassandra database at {}:{}.'.format(
core.configuration['database']['host'],
core.configuration['database']['keyspace']))
def fetch_cluster_cords(cluster):
"""
This function is needed when one cluster belongs to multiple operators. Returns all cords the acronym belongs to.
:param cluster: cluster name, acronym
:return: array of objects with provided cluster
"""
with open("config.yml", 'r') as yml_file:
config = yaml.load(yml_file)['database_options']
connection.setup([config['address']], config['keyspace'])
cluster_array = ClusterList.objects.filter(acronym=cluster)
return cluster_array
def setup_package():
warnings.simplefilter('always') # for testing warnings, make sure all are let through
os.environ[CQLENG_ALLOW_SCHEMA_MANAGEMENT] = '1'
use_single_node()
keyspace = 'cqlengine_test'
connection.setup(['localhost'],
protocol_version=PROTOCOL_VERSION,
default_keyspace=keyspace)
create_keyspace_simple(keyspace, 1)
def _setup_cassandra(hosts, keyspace):
"""Setup connection to cassandra nodes.
This function needs to be called before making any queries.
:param hosts `list`: list of hosts to connect to.
:param keyspace `unicode`: name of the keyspace to connect.
"""
if not isinstance(hosts, list):
raise ValueError("hosts only accepts list of ips.")
connection.setup(hosts=hosts, default_keyspace=keyspace,
protocol_version=3)
def setup(self):
from cassandra.cqlengine import connection
if connection.cluster is not None:
# already connected
return
connection.setup(self.hosts, self.keyspace, **self.connection_options)
consistency = self.connection_options.get('consistency')
if consistency:
self.session.default_consistency_level = consistency
for option, value in self.session_options.items():
setattr(self.session, option, value)
def test_cqlengine_can_connect(self):
class TestModel(Model):
id = columns.Integer(primary_key=True)
val = columns.Text()
connection.setup(None,
"test",
cloud={'secure_connect_bundle': self.creds})
create_keyspace_simple('test', 1)
sync_table(TestModel)
TestModel.objects.create(id=42, value='test')
self.assertEqual(len(TestModel.objects.all()), 1)
def build():
# setup connection
connection.setup(protocol_version=3, **settings.DATABASE['config'])
# create keyspace, because we only have 2 nodes in 1 datacenter
# then we use simple strategy
create_keyspace_simple(**settings.DATABASE['keyspace'])
# sync each model
# if you alter field, this mechanism
# wont sync your changes.
for model in MODELS:
sync_table(model)
def setup(self):
from cassandra.cqlengine import connection
if connection.cluster is not None:
# already connected
return
connection.setup(self.hosts, self.keyspace, **self.connection_options)
consistency = self.connection_options.get('consistency')
if consistency:
self.session.default_consistency_level = consistency
for option, value in self.session_options.items():
setattr(self.session, option, value)
def process_sample_coverage(job, addresses, keyspace, auth, sample, program, samples):
connection.setup(addresses, keyspace, auth_provider=auth)
with open("{}.sambamba_coverage.bed".format(samples[sample]['library_name']), 'rb') as coverage:
reader = csv.reader(coverage, delimiter='\t')
header = reader.next()
threshold_indices = list()
thresholds = list()
index = 0
for element in header:
if element.startswith("percentage"):
threshold = element.replace('percentage', '')
threshold_indices.append(index)
thresholds.append(int(threshold))
index += 1
for row in reader:
threshold_data = defaultdict(float)
index = 0
for threshold in thresholds:
threshold_data[threshold] = row[threshold_indices[index]]
index += 1
sample_data = SampleCoverage.create(sample=samples[sample]['sample_name'],
library_name=samples[sample]['library_name'],
run_id=samples[sample]['run_id'],
num_libraries_in_run=samples[sample]['num_libraries_in_run'],
sequencer_id=samples[sample]['sequencer'],
program_name=program,
extraction=samples[sample]['extraction'],
panel=samples[sample]['panel'],
target_pool=samples[sample]['target_pool'],
amplicon=row[3],
num_reads=row[4],
mean_coverage=row[5],
thresholds=thresholds,
perc_bp_cov_at_thresholds=threshold_data)
amplicon_data = AmpliconCoverage.create(amplicon=row[3],
sample=samples[sample]['sample_name'],
library_name=samples[sample]['library_name'],
run_id=samples[sample]['run_id'],
num_libraries_in_run=samples[sample]['num_libraries_in_run'],
sequencer_id=samples[sample]['sequencer'],
program_name=program,
extraction=samples[sample]['extraction'],
panel=samples[sample]['panel'],
target_pool=samples[sample]['target_pool'],
num_reads=row[4],
mean_coverage=row[5],
thresholds=thresholds,
perc_bp_cov_at_thresholds=threshold_data)
def process_sample_coverage(job, addresses, keyspace, auth, sample, program, samples):
connection.setup(addresses, keyspace, auth_provider=auth)
with open("{}.sambamba_coverage.bed".format(samples[sample]['library_name']), 'rb') as coverage:
reader = csv.reader(coverage, delimiter='\t')
header = reader.next()
threshold_indices = list()
thresholds = list()
index = 0
for element in header:
if element.startswith("percentage"):
threshold = element.replace('percentage', '')
threshold_indices.append(index)
thresholds.append(int(threshold))
index += 1
for row in reader:
threshold_data = defaultdict(float)
index = 0
for threshold in thresholds:
threshold_data[threshold] = row[threshold_indices[index]]
index += 1
sample_data = SampleCoverage.create(sample=samples[sample]['sample_name'],
library_name=samples[sample]['library_name'],
run_id=samples[sample]['run_id'],
num_libraries_in_run=samples[sample]['num_libraries_in_run'],
sequencer_id=samples[sample]['sequencer'],
program_name=program,
extraction=samples[sample]['extraction'],
panel=samples[sample]['panel'],
target_pool=samples[sample]['target_pool'],
amplicon=row[3],
num_reads=row[4],
mean_coverage=row[5],
thresholds=thresholds,
perc_bp_cov_at_thresholds=threshold_data)
amplicon_data = AmpliconCoverage.create(amplicon=row[3],
sample=samples[sample]['sample_name'],
library_name=samples[sample]['library_name'],
run_id=samples[sample]['run_id'],
num_libraries_in_run=samples[sample]['num_libraries_in_run'],
sequencer_id=samples[sample]['sequencer'],
program_name=program,
extraction=samples[sample]['extraction'],
panel=samples[sample]['panel'],
target_pool=samples[sample]['target_pool'],
num_reads=row[4],
mean_coverage=row[5],
thresholds=thresholds,
perc_bp_cov_at_thresholds=threshold_data)
def create_orgspace():
session = get_session()
# TODO: Replication strategy should be updated to 3
query = SimpleStatement(
"CREATE KEYSPACE IF NOT EXISTS %s WITH REPLICATION = {'class': 'NetworkTopologyStrategy', 'DC1': 1};"
% ("org", ))
session.execute(query)
session.shutdown()
connection.setup(CASSANDRA_HOSTS, "org", protocol_version=3)
# session = get_session(orgname)
sync_table(org)
connection.unregister_connection('default')
return
def setup(self):
with self.lock:
self.session = connection.get_session()
if not (self.session is None or self.session.is_shutdown):
# already connected
return
for option, value in self.session_options.items():
setattr(Session, option, value)
connection.setup(self.hosts, self.keyspace,
**self.connection_options)
self.session = connection.get_session()
self.cluster = connection.get_cluster()
def setup(self):
with self.lock:
self.session = connection.get_session()
if not (self.session is None or self.session.is_shutdown):
# already connected
return
for option, value in self.session_options.items():
setattr(Session, option, value)
connection.setup(self.hosts, self.keyspace,
**self.connection_options)
self.session = connection.get_session()
self.cluster = connection.get_cluster()
def get(self):
user_id = get_user_id_from_jwt()
connection.setup(hosts=CASSANDRA_HOSTS, default_keyspace=CHAT_KEYSPACE)
chat_rows = ChatByUserId.filter(user_id=user_id)
chat_list = []
for chat in chat_rows:
chat_list.append(chat.to_object())
return {
"results": len(chat_list),
"chats": chat_list
}
def main():
# create a keyspace "test"
connection.setup(['140.121.101.164'], "weather1")
management.create_keyspace_simple('weather1', 3)
# connect to test keyspace
connection.setup(['140.121.101.164'], "weather1", protocol_version=3)
management.sync_type('test', Air)
management.sync_type('test', Sun)
management.sync_type('test', Rain)
management.sync_type('test', Basic)
management.sync_type('test', Value)
management.sync_table(Weather)
def setup_connection(set_default_keyspace=True):
"""Set 'cqlengine' connection settings"""
if connection.session is not None:
logger.warn("setup_connection(): connection already configured. "
"Will overwrite old settings")
connection.setup(settings.CASSANDRA_CONNECTION['HOSTS'],
default_keyspace=settings.CASSANDRA_CONNECTION['KEYSPACE'],
**settings.CASSANDRA_CONNECTION['CLUSTER_KWARGS'])
if set_default_keyspace:
# Management commands that creates keyspaces requires a way to
# create connections when the keyspaces doesn't exists yet
set_session_default_keyspace()
logger.info("setup_connection(): cassandra.cqlengine.connection.setup() done")
def setup():
"""Run the connection setup."""
cassandra_conf = CONF['data_store']
cluster_connect = dict(hosts=cassandra_conf['cluster_node'],
port=cassandra_conf['port'],
default_keyspace=cassandra_conf['keyspace'],
executor_threads=6,
retry_connect=True,
lazy_connect=True)
auth_provider = _auth_provider(conf=cassandra_conf)
if auth_provider:
cluster_connect['auth_provider'] = auth_provider
connection.setup(**cluster_connect)
return connection
def get_app():
app = Flask(__name__)
# routing
api = Api(app)
api.add_resource(CreateUrl, '/shorten')
api.add_resource(GetUrl, '/<url_hash>')
# create table
connection.setup(['127.0.0.1'], _NAME, lazy_connect=True,
retry_connect=True, protocol_version=3)
sync_table(Url)
return app
def get_app():
app = Flask(__name__)
# routing
api = Api(app)
api.add_resource(ListenMusic, '/listened')
api.add_resource(GetTopK, '/topk')
# create table
connection.setup(['127.0.0.1'], _NAME, lazy_connect=True,
retry_connect=True, protocol_version=3)
sync_table(Music)
sync_table(ListenLog)
sync_table(TopkMusic)
return app
def __init__(self, instance_id):
self.instance_id = int(instance_id)
# setup cassadnra connection
connection.setup(['127.0.0.1'], "estate1", consistency=ConsistencyLevel.ALL)
# TODO move this to an indipened reset DB script
if self.instance_id == 0:
print "FLUSH DB"
# flush database by first node (for development)
management.drop_keyspace("estate1")
# create needed tables
management.create_keyspace_simple("estate1", replication_factor=1, durable_writes=True)
management.sync_table(KeyValueItem)
print "ES: Initialized estate for instance: %s" % self.instance_id
def sync(cls):
try:
cassandra_host = connections['default'].settings_dict['HOST'].split(',')
keyspace = connections['default'].settings_dict['NAME']
user = connections['default'].settings_dict['USER']
password = connections['default'].settings_dict['PASSWORD']
auth_provider = PlainTextAuthProvider(username=user, password=password)
if cql_cluster is not None:
cql_cluster.shutdown()
if cql_session is not None:
cql_session.shutdown()
connection.setup(cassandra_host, keyspace, auth_provider=auth_provider)
sync_table(cls)
except NoHostAvailable:
pass
def configure(self, binder):
connection.setup(["cassandrahost"], "biketimer", protocol_version=4)
cluster = Cluster(["cassandrahost"])
session = cluster.connect("biketimer")
users_repository_instance = CassandraUsersRepository(cluster, session)
binder.bind(UsersRepository, to=users_repository_instance)
spots_repository_instance = CassandraSpotsRepository(cluster, session)
binder.bind(SpotsRepository, to=spots_repository_instance)
runs_repository_instance = CassandraRunsRepository(cluster, session)
binder.bind(RunsRepository, to=runs_repository_instance)
checkpoint_passes_repository_instance = CassandraCheckpointPassesRepository(cluster, session)
binder.bind(CheckpointPassesRepository, to=checkpoint_passes_repository_instance)
def setup(self, collection):
"""
:param collection:
:return:
"""
connection.setup([CASSANDRA_1], collection)
management.create_keyspace(
collection,
replication_factor=1,
strategy_class='SimpleStrategy',
)
TestModel.__keyspace__ = collection
management.sync_table(TestModel)
def setup(self, force=False, throw=False):
if self._setup and not force:
return True
try:
connection.setup(self.uri, self.keyspace)
management.create_keyspace(self.keyspace, replication_factor=1, strategy_class='SimpleStrategy')
for model in self._models:
model.__keyspace__ = self.keyspace
management.sync_table(model)
except NoHostAvailable:
logger.error('Could not connect to Cassandra, expect errors.')
return False
# Note: return values are for test skipping
self._setup = True
return True
def init_db_blueprint():
global cluster
cluster = Cluster(
db.config['CASSANDRA_CONTACT_POINTS']
)
global session
session = cluster.connect(
db.config['CASSANDRA_KEYSPACE']
)
connection.setup(
db.config['CASSANDRA_CONTACT_POINTS'],
db.config['CASSANDRA_KEYSPACE'],
protocol_version=3
)
initialize_keyspace()
def cassandra_init(sender=None, signal=None):
""" Issue reported in ADDNOW-483: Based on suggestions in
http://stackoverflow.com/questions/24785299/python-cassandra-driver-operationtimeout-on-every-query-in-celery-task.
"""
try:
cassandra_host = connections['default'].settings_dict['HOST'].split(',')
keyspace = connections['default'].settings_dict['NAME']
user = connections['default'].settings_dict['USER']
password = connections['default'].settings_dict['PASSWORD']
auth_provider = PlainTextAuthProvider(username=user, password=password)
if cql_cluster is not None:
cql_cluster.shutdown()
if cql_session is not None:
cql_session.shutdown()
connection.setup(cassandra_host, keyspace, auth_provider=auth_provider)
except NoHostAvailable:
pass
