def test_populate_time_range_subset():
""" Test that we don't create entries that weren't set by the user. """
example_request = {
'metrics': [],
'start_relative': {'value': '1', 'unit': 'hours'},
}
assert populate_time_range(example_request) == {'start_relative': {'value': '1', 'unit': 'hours'}}
def handle_query():
try:
if request.method == 'POST':
payload = json.loads(request.data) # dict
else:
payload = json.loads(request.args.get('query'))
except:
err = 'Cannot deserialize JSON payload.'
logging.error(err)
return json.dumps({'error': err}), 500
config = app.config['tscached']
logging.info('Query')
redis_client = getRedisClient()
kairos_time_range = populate_time_range(payload)
ret_data = {'queries': []}
overall_cache_mode = None
# HTTP request may contain one or more kqueries
for kquery in KQuery.from_request(payload, redis_client):
try:
# get whatever is in redis for this kquery
kq_result = kquery.get_cached()
# readahead shadow load support
process_for_readahead(config, redis_client, kquery.get_key(),
request.referrer, request.headers)
if kq_result:
kq_resp, cache_mode = process_cache_hit(
config, redis_client, kquery, kairos_time_range)
else:
kq_resp = cold(config, redis_client, kquery, kairos_time_range)
cache_mode = 'cold_miss'
except BackendQueryFailure as e:
# KairosDB is broken so we fail fast.
logging.error('BackendQueryFailure: %s' % e.message)
return json.dumps({'error': e.message}), 500
except redis.exceptions.RedisError as e:
# Redis is broken, so we pretend it's a cache miss. This will eat any further exceptions.
logging.error('RedisError: ' + e.message)
kq_resp = cold(config, redis_client, kquery, kairos_time_range)
cache_mode = 'cold_proxy'
ret_data['queries'].append(kq_resp)
if not overall_cache_mode:
overall_cache_mode = cache_mode
elif cache_mode != overall_cache_mode:
overall_cache_mode = 'mixed'
return json.dumps(ret_data), 200, {
'Content-Type': 'application/json',
'X-tscached-mode': overall_cache_mode
}
def handle_query():
try:
if request.method == 'POST':
payload = json.loads(request.data) # dict
else:
payload = json.loads(request.args.get('query'))
except:
err = 'Cannot deserialize JSON payload.'
logging.error(err)
return json.dumps({'error': err}), 500
config = app.config['tscached']
logging.info('Query')
redis_client = redis.StrictRedis(host=config['redis']['host'], port=config['redis']['port'])
kairos_time_range = populate_time_range(payload)
ret_data = {'queries': []}
overall_cache_mode = None
# HTTP request may contain one or more kqueries
for kquery in KQuery.from_request(payload, redis_client):
try:
# get whatever is in redis for this kquery
kq_result = kquery.get_cached()
# readahead shadow load support
process_for_readahead(config, redis_client, kquery.get_key(), request.referrer,
request.headers)
if kq_result:
kq_resp, cache_mode = process_cache_hit(config, redis_client, kquery, kairos_time_range)
else:
kq_resp = cold(config, redis_client, kquery, kairos_time_range)
cache_mode = 'cold_miss'
except BackendQueryFailure as e:
# KairosDB is broken so we fail fast.
logging.error('BackendQueryFailure: %s' % e.message)
return json.dumps({'error': e.message}), 500
except redis.exceptions.RedisError as e:
# Redis is broken, so we pretend it's a cache miss. This will eat any further exceptions.
logging.error('RedisError: ' + e.message)
kq_resp = cold(config, redis_client, kquery, kairos_time_range)
cache_mode = 'cold_proxy'
ret_data['queries'].append(kq_resp)
if not overall_cache_mode:
overall_cache_mode = cache_mode
elif cache_mode != overall_cache_mode:
overall_cache_mode = 'mixed'
return json.dumps(ret_data), 200, {'Content-Type': 'application/json', 'X-tscached-mode': overall_cache_mode}
def test_populate_time_range_subset():
""" Test that we don't create entries that weren't set by the user. """
example_request = {
'metrics': [],
'start_relative': {
'value': '1',
'unit': 'hours'
},
}
assert populate_time_range(example_request) == {
'start_relative': {
'value': '1',
'unit': 'hours'
}
}
def test_populate_time_range_everything():
""" Test that needed elements from HTTP request make it in, and nothing else. """
# Note: we do not sanity check the user's data. That's on them.
example_request = {
'metrics': [],
'start_relative': {'value': '1', 'unit': 'hours'},
'something_else': 'whatever',
'end_relative': {'value': '1', 'unit': 'minutes'},
'start_absolute': 1234567890,
'end_absolute': 2345678901,
}
time_range = populate_time_range(example_request)
assert len(time_range.keys()) == 4
assert time_range['start_relative'] == {'value': '1', 'unit': 'hours'}
assert time_range['end_relative'] == {'value': '1', 'unit': 'minutes'}
assert time_range['start_absolute'] == 1234567890
assert time_range['end_absolute'] == 2345678901
def test_populate_time_range_everything():
""" Test that needed elements from HTTP request make it in, and nothing else. """
# Note: we do not sanity check the user's data. That's on them.
example_request = {
'metrics': [],
'start_relative': {
'value': '1',
'unit': 'hours'
},
'something_else': 'whatever',
'end_relative': {
'value': '1',
'unit': 'minutes'
},
'start_absolute': 1234567890,
'end_absolute': 2345678901,
}
time_range = populate_time_range(example_request)
assert len(time_range.keys()) == 4
assert time_range['start_relative'] == {'value': '1', 'unit': 'hours'}
assert time_range['end_relative'] == {'value': '1', 'unit': 'minutes'}
assert time_range['start_absolute'] == 1234567890
assert time_range['end_absolute'] == 2345678901
