def handler(ctx, data: io.BytesIO = None):
return_citizens = []
try:
provider = SignatureProvider(
tenant_id='Your Tenant OCID',
user_id='Your User OCID',
private_key='location of Pem file',
fingerprint='The fingerprint for your key pair goes here',
pass_phrase='The pass phrase for your key goes here')
compartment = 'Your Compartment Name Goes Here'
config = NoSQLHandleConfig(Regions.US_ASHBURN_1, provider)
config.set_default_compartment(compartment)
logger = logging.getLogger('Citizens')
logger.setLevel(logging.WARNING)
config.set_logger(logger)
handle = NoSQLHandle(config)
table_name = 'Citizens'
## Prepare select statement#
statement = 'select * from ' + table_name
request = PrepareRequest().set_statement(statement)
prepared_result = handle.prepare(request)
## Query, using the prepared statement#
request = QueryRequest().set_prepared_statement(prepared_result)
while True:
result = handle.query(request)
for r in result.get_results():
return_citizens.append(dict(r))
if request.is_done():
break
except (Exception, ValueError) as ex:
logging.getLogger().info('error parsing json payload: ' + str(ex))
logging.getLogger().info("Inside OCI function")
return response.Response(ctx,
response_data=json.dumps(return_citizens),
headers={"Content-Type": "application/json"})
class TestRateLimiting(unittest.TestCase, TestBase):
"""
Tests for driver-side rate limiting. These tests require a Cloud Simulator
instance as rate limiting is not available or need for on-premise.
"""
if not is_onprem():
@classmethod
def setUpClass(cls):
cls.set_up_class()
create_statement = ('CREATE TABLE ' + table_name + '(id integer, \
name string, primary key(id))')
create_request = TableRequest().set_statement(
create_statement).set_table_limits(TableLimits(100, 100, 1))
cls.table_request(create_request)
@classmethod
def tearDownClass(cls):
cls.tear_down_class()
def setUp(self):
handle_config = get_handle_config(tenant_id).set_retry_handler(
DefaultRetryHandler()).set_consistency(Consistency.EVENTUAL)
self.handle = NoSQLHandle(handle_config)
def tearDown(self):
self.handle.close()
def testRateLimitingBasicInternal(self):
self._test_limiters(False, 500, 200, 200, 10, 100.0)
def testRateLimitingBasicExternal(self):
self._test_limiters(True, 500, 200, 200, 10, 100.0)
def testRateLimitingBasicInternalPercent(self):
self._test_limiters(False, 500, 200, 200, 10, 20.0)
def testRateLimitingBasicExternalPercent(self):
self._test_limiters(True, 500, 200, 200, 10, 20.0)
def testRateLimitingExtendedInternalFull(self):
# Skip unless extended tests are enabled
if rate_limiter_extended():
allunits = [1, 50, 300]
for units in allunits:
if units == 500:
self._test_limiters(False, 500, units, units, 10,
100.0)
def testRateLimitingExtendedInternalPercent(self):
# Skip unless extended tests are enabled
if rate_limiter_extended():
allunits = [10, 100, 2000]
for units in allunits:
self._test_limiters(False, 500, units, units, 10, 10.0)
def testRateLimitingExtendedExternalFull(self):
# Skip unless extended tests are enabled
if rate_limiter_extended():
allunits = [1, 50, 300]
for units in allunits:
self._test_limiters(True, 500, units, units, 10, 100.0)
def testRateLimitingExtendedExternalPercent(self):
# Skip unless extended tests are enabled
if rate_limiter_extended():
allunits = [10, 100, 2000]
for units in allunits:
self._test_limiters(True, 500, units, units, 10, 10.0)
def _alter_table_limits(self, limits):
table_request = TableRequest().set_table_name(
table_name).set_table_limits(limits).set_timeout(15000)
return self.handle.do_table_request(table_request, 15000, 1000)
def _do_rate_limited_ops(self, num_seconds, read_limit, write_limit,
max_rows, check_units, use_percent,
use_external_limiters):
"""
Runs puts and gets continuously for N seconds.
Verify that the resultant RUs/WUs used match the given rate limits.
"""
if read_limit == 0 and write_limit == 0:
return
put_request = PutRequest().set_table_name(table_name)
get_request = GetRequest().set_table_name(table_name)
key = dict()
# TODO: random sizes 0-nKB.
value = dict()
value['name'] = 'jane'
start_time = int(round(time() * 1000))
end_time = start_time + num_seconds * 1000
read_units_used = 0
write_units_used = 0
total_delayed_ms = 0
throttle_exceptions = 0
rlim = None
wlim = None
max_val = float(read_limit + write_limit)
if not use_external_limiters:
# Reset internal limiters so they don't have unused units.
self.handle.get_client().reset_rate_limiters(table_name)
else:
rlim = SimpleRateLimiter(read_limit * use_percent / 100.0, 1)
wlim = SimpleRateLimiter(write_limit * use_percent / 100.0, 1)
while True:
fld_id = int(random() * max_rows)
if read_limit == 0:
do_put = True
elif write_limit == 0:
do_put = False
else:
v = int(random() * max_val)
do_put = v >= read_limit
try:
if do_put:
value['id'] = fld_id
put_request.set_value(value).set_read_rate_limiter(
None).set_write_rate_limiter(wlim)
pres = self.handle.put(put_request)
write_units_used += pres.get_write_units()
total_delayed_ms += pres.get_rate_limit_delayed_ms()
rs = pres.get_retry_stats()
if rs is not None:
throttle_exceptions += rs.get_num_exceptions(
WriteThrottlingException.__class__.__name__)
else:
key['id'] = fld_id
get_request.set_key(key).set_read_rate_limiter(
rlim).set_write_rate_limiter(None)
gres = self.handle.get(get_request)
read_units_used += gres.get_read_units()
total_delayed_ms += gres.get_rate_limit_delayed_ms()
rs = gres.get_retry_stats()
if rs is not None:
throttle_exceptions += rs.get_num_exceptions(
ReadThrottlingException.__class__.__name__)
except ReadThrottlingException:
self.fail(
'Expected no read throttling exceptions, got one.')
except WriteThrottlingException:
self.fail(
'Expected no write throttling exceptions, got one.')
if int(round(time() * 1000)) >= end_time:
break
num_seconds = (int(round(time() * 1000)) - start_time) / 1000
rus = read_units_used / num_seconds
wus = write_units_used / num_seconds
if not check_units:
return
use_percent /= 100.0
if (rus < read_limit * use_percent * 0.8
or rus > read_limit * use_percent * 1.2):
self.fail('Gets: Expected around ' +
str(read_limit * use_percent) + ' RUs, got ' +
str(rus))
if (wus < write_limit * use_percent * 0.8
or wus > write_limit * use_percent * 1.2):
self.fail('Puts: Expected around ' +
str(write_limit * use_percent) + ' WUs, got ' +
str(wus))
def _do_rate_limited_queries(self, num_seconds, read_limit, max_kb,
single_partition, use_percent,
use_external_limiters):
"""
Runs queries continuously for N seconds.
Verify that the resultant RUs used match the given rate limit.
"""
start_time = int(round(time() * 1000))
end_time = start_time + num_seconds * 1000
read_units_used = 0
rlim = None
wlim = None
if not use_external_limiters:
# Reset internal limiters so they don't have unused units.
self.handle.get_client().reset_rate_limiters(table_name)
else:
rlim = SimpleRateLimiter(read_limit * use_percent / 100.0, 1)
wlim = SimpleRateLimiter(read_limit * use_percent / 100.0, 1)
prep_req = PrepareRequest()
if single_partition:
# Query based on single partition scanning.
fld_id = int(random() * 500)
prep_req.set_statement('SELECT * FROM ' + table_name +
' WHERE id = ' + str(fld_id))
else:
# Query based on all partitions scanning.
prep_req.set_statement('SELECT * FROM ' + table_name +
' WHERE name = "jane"')
prep_res = self.handle.prepare(prep_req)
self.assertTrue(prep_res.get_prepared_statement() is not None,
'Prepare statement failed.')
read_units_used += prep_res.get_read_units()
while True:
"""
We need a 20 second timeout because in some cases this is called
on a table with 500 rows and 50RUs (uses 1000RUs = 20 seconds).
"""
query_req = QueryRequest().set_prepared_statement(
prep_res).set_timeout(20000).set_read_rate_limiter(
rlim).set_write_rate_limiter(wlim)
if max_kb > 0:
# Query with size limit.
query_req.set_max_read_kb(max_kb)
try:
while True:
res = self.handle.query(query_req)
res.get_results()
read_units_used += res.get_read_units()
if query_req.is_done():
break
except ReadThrottlingException:
self.fail('Expected no throttling exceptions, got one.')
except RequestTimeoutException:
# This may happen for very small limit tests.
pass
if int(round(time() * 1000)) >= end_time:
break
num_seconds = (int(round(time() * 1000)) - start_time) / 1000
use_percent /= 100.0
rus = read_units_used / num_seconds
expected_rus = read_limit * use_percent
# For very small expected amounts, just verify within 1 RU.
if (expected_rus < 4
and expected_rus - 1 <= rus <= expected_rus + 1):
return
if rus < expected_rus * 0.6 or rus > expected_rus * 1.5:
self.fail('Queries: Expected around ' + str(expected_rus) +
' RUs, got ' + str(rus))
def _run_limited_ops_on_table(self, read_limit, write_limit,
max_seconds, max_rows, use_percent,
use_external_limiters):
"""
Runs get/puts then queries on a table. Verify RUs/WUs are within
given limits.
"""
self._alter_table_limits(TableLimits(read_limit, write_limit, 50))
"""
We have to do the read/write ops separately since we're running
single-threaded, and the result is hard to tell if it's correct
(example: we'd get 37RUs and 15WUs).
"""
self._do_rate_limited_ops(max_seconds, 0, write_limit, max_rows,
True, use_percent, use_external_limiters)
self._do_rate_limited_ops(max_seconds, read_limit, 0, max_rows,
True, use_percent, use_external_limiters)
# Query based on single partition scanning.
self._do_rate_limited_queries(max_seconds, read_limit, 20, True,
use_percent, use_external_limiters)
# Query based on all partitions scanning.
self._do_rate_limited_queries(max_seconds, read_limit, 20, False,
use_percent, use_external_limiters)
def _test_limiters(self, use_external_limiters, max_rows, read_limit,
write_limit, test_seconds, use_percent):
# Clear any previous rate limiters.
client = self.handle.get_client()
client.enable_rate_limiting(False, 100.0)
# Configure our handle for rate limiting.
if not use_external_limiters:
client.enable_rate_limiting(True, use_percent)
# Limit bursts in tests.
client.set_ratelimiter_duration_seconds(1)
# Then do the actual testing.
self._run_limited_ops_on_table(read_limit, write_limit,
test_seconds, max_rows, use_percent,
use_external_limiters)