def validate_evaluate(rule_condition):
word_list = rule_condition.split(" ")
rules = ""
list_length = len(word_list)
i = 0
while i < list_length:
try:
operator_handler = operator_handlers.operator_dictionary.get(word_list[i])
except Exception as e:
raise e
if operator_handler is not None:
try:
result = operator_handler(name=word_list[i]).evaluate(metric_name=word_list[i + 1], begin_time_given=word_list[i + 2])
i = i + 3
rules += result
except Exception as e:
raise exceptions.InvalidException("Rule syntax is not valid")
else:
rules += word_list[i]
i = i+1
rules += " "
try:
print("RULES " + str(rules))
result_value = eval(rules)
if result_value is True:
return result_value
else:
return False
except:
raise exceptions.InvalidException("Rule syntax is not valid")
def create_rule(name_space, rule_condition, rule_name, action_value_map, freq):
try:
is_valid_rule = validate_evaluate(rule_condition)
except Exception as e:
raise e
if is_valid_rule is None:
raise exceptions.InvalidException("not_valid_rule_error")
return false
try:
action_value_map = modify_action_value_map(action_value_map)
except Exception as e:
raise e
if action_value_map is None:
raise exceptions.InvalidException("empty_action_value_map_error")
return false
rule_id = Rule.rule_existence(rule_name, name_space)
if rule_id is not None:
Rule.update(rule_id, rule_condition, freq)
else:
try:
rule_id = Rule.insert_into_rule_table(name_space, rule_condition,
rule_name, freq)
except Exception as e:
raise e
for action_value in action_value_map:
action_id = action_value[0]
value = action_value[1]
try:
RuleAction.insert_into_rule_action_table(rule_id, action_id, value)
except Exception as e:
raise e
def modify_action_value_map(action_value_map):
action_value_list = []
if len(action_value_map) == 0:
return None
for i in range(len(action_value_map)):
print(action_value_map)
action_id = Action.get_id_from_name(action_value_map[i][0])
if(action_id is not None and is_valid_value(action_value_map[i][1])):
action_value_list.append([action_id, action_value_map[i][1]])
else:
if action_id is None:
raise exceptions.InvalidException("action_id_null_error")
else:
raise exceptions.InvalidException("Value is not valid")
return action_value_list
def create_action(action_name):
action_object = Action.objects.create(name=action_name)
if action_object is None:
raise exceptions.InvalidException("Error in creating " +
action_name)
else:
return #action_object.pk
def insert_into_rule_action_table(rule_id, action_id, value):
rule_action = RuleAction.objects.create(rule_id=rule_id,
action_id=action_id,
value=value)
if rule_action is None:
raise exceptions.InvalidException("Error in creating row for " +
value)
def create_entry(namespace, metric_name, metric_value, date_time):
response_obj = MetricData.objects.create(namespace=namespace,
index=metric_name,
metric_value=metric_value,
created_date=date_time)
if response_obj is None:
raise exceptions.InvalidException("Error in creating row for " +
str(namespace))
def get_id_from_name(action_name):
print("ENTERED ")
action_id = list(
Action.objects.filter(name=action_name).values_list("id",
flat=True))
if action_id is None:
raise exceptions.InvalidException(action_name + " not found")
return action_id[0]
def insert_into_rule_table(namespace_name, rule_condition, rule_name,
frequency):
namespace_id = list(
Namespace.objects.filter(name=namespace_name).values_list(
'id', flat=True))
if len(namespace_id) == 0:
raise exceptions.InvalidException("No entry found for " +
str(namespace_name) +
" in Namespace table")
rule_object = Rule.objects.create(name=rule_name,
namespace_id=namespace_id[0],
frequency=frequency,
rule_condition=rule_condition)
if rule_object is None:
raise exceptions.InvalidException("Error in creating " +
rule_name + " " +
str(namespace_name))
else:
return rule_object.pk
def total_seconds(frequency):
freq_split = frequency.split('_')
if len(freq_split) is not 4:
raise exceptions.InvalidException("Invalid Format")
days = int(freq_split[0][:-1])
hours = int(freq_split[1][:-1])
minutes = int(freq_split[2][:-1])
seconds = int(freq_split[3][:-1])
total_seconds = seconds + (minutes * 60) + (hours * 60 * 60) + (days * 24 *
60 * 60)
return total_seconds
def delete_rule(rule_name):
rule_list = Rule.objects.filter(name=rule_name)
if len(rule_list) == 0:
raise exceptions.InvalidException(rule_name + " doesn't exist")
else:
for rule in rule_list:
rule.is_active = False
rule.save()
action_rules = RuleAction.objects.filter(id=rule.id)
for action_rule in action_rules:
action_rule.is_active = False
action_rule.save()
return
def modify_date_time(before_time):
word_list = before_time.split('_')
if len(word_list) is not 4:
raise exceptions.InvalidException("Invalid data_time format")
day = word_list[0][:-1]
hour = word_list[1][:-1]
minute = word_list[2][:-1]
second = word_list[3][:-1]
query_date_time = datetime.today() - timedelta(days=int(day),
hours=int(hour),
minutes=int(minute),
seconds=int(second))
return query_date_time
