def exists(self, name):
result = False
if self.connect_to_redis_db():
try:
result = self.redis_db.exists(name)
except Exception as ex:
err_msg = 'Failed Redis_db exists: {0}'.format(ex)
log_error_message(err_msg)
return result
def get_pipeline(self):
result = None
if self.connect_to_redis_db():
try:
result = self.redis_db.pipeline()
except Exception as ex:
err_msg = 'Failed Redis_db get_pipeline: {0}'.format(ex)
log_error_message(err_msg)
return result
def get_len(self, name):
result = None
if self.connect_to_redis_db():
try:
result = self.redis_db.llen(name)
except Exception as ex:
err_msg = 'Failed Redis_db get_len: {0}'.format(ex)
log_error_message(err_msg)
return result
def get_hash(self, name, attribute):
result = None
if self.connect_to_redis_db():
try:
result = self.redis_db.hget(name, attribute)
except Exception as ex:
err_msg = 'Failed Redis_db get_hash: {0}'.format(ex)
log_error_message(err_msg)
return result
def get_hash_all(self, name):
result = {}
if self.connect_to_redis_db():
try:
result = self.redis_db.hgetall(name)
except Exception as ex:
err_msg = 'Failed Redis_db get_hash_all: {0}'.format(ex)
log_error_message(err_msg)
return result
def get_set_cardinality(self, name):
result = 0
if self.connect_to_redis_db():
try:
result = self.redis_db.scard(name)
except Exception as ex:
err_msg = 'Failed Redis_db get_set_cardinality: {0}'.format(ex)
log_error_message(err_msg)
return result
def del_hash_attribute(self, name, attribute):
result = False
if self.connect_to_redis_db():
try:
self.redis_db.hdel(name, attribute)
result = True
except Exception as ex:
err_msg = 'Failed Redis_db del_hash_attribute: {0}'.format(ex)
log_error_message(err_msg)
return result
def queue_push(self, name, value):
result = False
if self.connect_to_redis_db():
try:
self.redis_db.rpush(name, value)
result = True
except Exception as ex:
err_msg = 'Failed Redis_db queue_push: {0}'.format(ex)
log_error_message(err_msg)
return result
def get_all_hash_attributes_values(self, name):
result = None
if self.connect_to_redis_db():
try:
result = self.redis_db.hscan(name)
except Exception as ex:
err_msg = 'Failed Redis_db get_all_hash_attributes_values: {0}'.format(
ex)
log_error_message(err_msg)
return result
def set_hash(self, name, attribute, value, expiration_seconds=0):
result = None
if self.connect_to_redis_db():
try:
result = self.redis_db.hset(name, attribute, value)
self.set_expire(name, expiration_seconds)
except Exception as ex:
err_msg = 'Failed Redis_db set_hash: {0}'.format(ex)
log_error_message(err_msg)
return result
def increment(self, name, value, expiration_seconds=0):
result = None
if self.connect_to_redis_db():
try:
result = self.redis_db.incr(name, value)
self.set_expire(name, expiration_seconds)
except Exception as ex:
err_msg = 'Failed Redis_db increment: {0}'.format(ex)
log_error_message(err_msg)
return result
def delete_value_from_set(self, name, value):
result = False
if self.connect_to_redis_db():
try:
self.redis_db.srem(name, value)
result = True
except Exception as ex:
err_msg = 'Failed Redis_db delete_value_from_set: {0}'.format(
ex)
log_error_message(err_msg)
return result
def get_value(self, name, default=None):
result = None
if self.connect_to_redis_db():
try:
result = self.redis_db.get(name)
if result is None:
result = default
except Exception as ex:
err_msg = 'Failed Redis_db get_value: {0}'.format(ex)
log_error_message(err_msg)
return result
def delete_value(self, key):
result = False
if self.connect_to_redis_db():
try:
self.redis_db.delete(key)
result = True
except Exception as ex:
err_msg = 'Failed Redis_db delete_value: {0}'.format(ex)
log_error_message(err_msg)
result = False
return result
def set_expire(self, name, expiration_seconds=0):
result = False
if expiration_seconds > 0:
if self.connect_to_redis_db():
try:
self.redis_db.expire(name, expiration_seconds)
result = True
except Exception as ex:
err_msg = 'Failed Redis_db set_expire: {0}'.format(ex)
log_error_message(err_msg)
return result
def get_list_of_set_values(self, name):
values_list = []
if self.connect_to_redis_db():
try:
members = self.redis_db.smembers(name)
for member in members:
if member is not None:
values_list.append(member)
except Exception as ex:
err_msg = 'Failed Redis_db get_list_of_set_values: {0}'.format(
ex)
log_error_message(err_msg)
return values_list
def pop_random_values_from_set(self, name, values_count=0):
values_list = []
if self.connect_to_redis_db():
try:
for i in range(0, values_count):
set_value = self.redis_db.spop(name)
if set_value is not None:
values_list.append(int(set_value))
except Exception as ex:
err_msg = 'Failed Redis_db pop_random_values_from_set: {0}'.format(
ex)
log_error_message(err_msg)
return values_list
def put_list_to_set(self, name, values_list=[], expiration_seconds=0):
result = False
if self.connect_to_redis_db():
try:
for value in values_list:
self.redis_db.sadd(name, value)
if values_list:
self.set_expire(name, expiration_seconds)
result = True
except Exception as ex:
err_msg = 'Failed Redis_db put_list_to_set: {0}'.format(ex)
log_error_message(err_msg)
return result