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# -*- coding: utf8 -*-
# Copyright (c) 2010-2012 OpenStack, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" Tests for swift.common.utils """
from __future__ import with_statement
import hashlib
import logging
import socket
import time
import unittest
from uuid import uuid4
from swift.common import memcached
class NullLoggingHandler(logging.Handler):
def emit(self, record):
pass
class ExplodingMockMemcached(object):
exploded = False
def sendall(self, string):
self.exploded = True
raise socket.error()
def readline(self):
self.exploded = True
raise socket.error()
def read(self, size):
self.exploded = True
raise socket.error()
class MockMemcached(object):
def __init__(self):
self.inbuf = ''
self.outbuf = ''
self.cache = {}
self.down = False
self.exc_on_delete = False
self.read_return_none = False
def sendall(self, string):
if self.down:
raise Exception('mock is down')
self.inbuf += string
while '\n' in self.inbuf:
cmd, self.inbuf = self.inbuf.split('\n', 1)
parts = cmd.split()
if parts[0].lower() == 'set':
self.cache[parts[1]] = parts[2], parts[3], \
self.inbuf[:int(parts[4])]
self.inbuf = self.inbuf[int(parts[4])+2:]
if len(parts) < 6 or parts[5] != 'noreply':
self.outbuf += 'STORED\r\n'
elif parts[0].lower() == 'add':
value = self.inbuf[:int(parts[4])]
self.inbuf = self.inbuf[int(parts[4])+2:]
if parts[1] in self.cache:
if len(parts) < 6 or parts[5] != 'noreply':
self.outbuf += 'NOT_STORED\r\n'
else:
self.cache[parts[1]] = parts[2], parts[3], value
if len(parts) < 6 or parts[5] != 'noreply':
self.outbuf += 'STORED\r\n'
elif parts[0].lower() == 'delete':
if self.exc_on_delete:
raise Exception('mock is has exc_on_delete set')
if parts[1] in self.cache:
del self.cache[parts[1]]
if 'noreply' not in parts:
self.outbuf += 'DELETED\r\n'
elif 'noreply' not in parts:
self.outbuf += 'NOT_FOUND\r\n'
elif parts[0].lower() == 'get':
for key in parts[1:]:
if key in self.cache:
val = self.cache[key]
self.outbuf += 'VALUE %s %s %s\r\n' % (key, val[0], len(val[2]))
self.outbuf += val[2] + '\r\n'
self.outbuf += 'END\r\n'
elif parts[0].lower() == 'incr':
if parts[1] in self.cache:
val = list(self.cache[parts[1]])
val[2] = str(int(val[2]) + int(parts[2]))
self.cache[parts[1]] = val
self.outbuf += str(val[2]) + '\r\n'
else:
self.outbuf += 'NOT_FOUND\r\n'
elif parts[0].lower() == 'decr':
if parts[1] in self.cache:
val = list(self.cache[parts[1]])
if int(val[2]) - int(parts[2]) > 0:
val[2] = str(int(val[2]) - int(parts[2]))
else:
val[2] = '0'
self.cache[parts[1]] = val
self.outbuf += str(val[2]) + '\r\n'
else:
self.outbuf += 'NOT_FOUND\r\n'
def readline(self):
if self.read_return_none:
return None
if self.down:
raise Exception('mock is down')
if '\n' in self.outbuf:
response, self.outbuf = self.outbuf.split('\n', 1)
return response+'\n'
def read(self, size):
if self.down:
raise Exception('mock is down')
if len(self.outbuf) >= size:
response = self.outbuf[:size]
self.outbuf = self.outbuf[size:]
return response
class TestMemcached(unittest.TestCase):
""" Tests for swift.common.memcached"""
def test_get_conns(self):
sock1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock1.bind(('127.0.0.1', 0))
sock1.listen(1)
sock1ipport = '%s:%s' % sock1.getsockname()
sock2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock2.bind(('127.0.0.1', 0))
sock2.listen(1)
orig_port = memcached.DEFAULT_MEMCACHED_PORT
try:
sock2ip, memcached.DEFAULT_MEMCACHED_PORT = sock2.getsockname()
sock2ipport = '%s:%s' % (sock2ip, memcached.DEFAULT_MEMCACHED_PORT)
# We're deliberately using sock2ip (no port) here to test that the
# default port is used.
memcache_client = memcached.MemcacheRing([sock1ipport, sock2ip])
one = two = True
while one or two: # Run until we match hosts one and two
key = uuid4().hex
for conn in memcache_client._get_conns(key):
peeripport = '%s:%s' % conn[2].getpeername()
self.assert_(peeripport in (sock1ipport, sock2ipport))
if peeripport == sock1ipport:
one = False
if peeripport == sock2ipport:
two = False
finally:
memcached.DEFAULT_MEMCACHED_PORT = orig_port
def test_set_get(self):
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
mock = MockMemcached()
memcache_client._client_cache['1.2.3.4:11211'] = [(mock, mock)] * 2
memcache_client.set('some_key', [1, 2, 3])
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
memcache_client.set('some_key', [4, 5, 6])
self.assertEquals(memcache_client.get('some_key'), [4, 5, 6])
memcache_client.set('some_key', ['simple str', 'utf8 str éà'])
# As per http://wiki.openstack.org/encoding, we should expect to have unicode
self.assertEquals(memcache_client.get('some_key'), ['simple str', u'utf8 str éà'])
self.assert_(float(mock.cache.values()[0][1]) == 0)
esttimeout = time.time() + 10
memcache_client.set('some_key', [1, 2, 3], timeout=10)
self.assert_(-1 <= float(mock.cache.values()[0][1]) - esttimeout <= 1)
def test_incr(self):
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
mock = MockMemcached()
memcache_client._client_cache['1.2.3.4:11211'] = [(mock, mock)] * 2
memcache_client.incr('some_key', delta=5)
self.assertEquals(memcache_client.get('some_key'), '5')
memcache_client.incr('some_key', delta=5)
self.assertEquals(memcache_client.get('some_key'), '10')
memcache_client.incr('some_key', delta=1)
self.assertEquals(memcache_client.get('some_key'), '11')
memcache_client.incr('some_key', delta=-5)
self.assertEquals(memcache_client.get('some_key'), '6')
memcache_client.incr('some_key', delta=-15)
self.assertEquals(memcache_client.get('some_key'), '0')
mock.read_return_none = True
self.assertRaises(memcached.MemcacheConnectionError,
memcache_client.incr, 'some_key', delta=-15)
def test_decr(self):
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
mock = MockMemcached()
memcache_client._client_cache['1.2.3.4:11211'] = [(mock, mock)] * 2
memcache_client.decr('some_key', delta=5)
self.assertEquals(memcache_client.get('some_key'), '0')
memcache_client.incr('some_key', delta=15)
self.assertEquals(memcache_client.get('some_key'), '15')
memcache_client.decr('some_key', delta=4)
self.assertEquals(memcache_client.get('some_key'), '11')
memcache_client.decr('some_key', delta=15)
self.assertEquals(memcache_client.get('some_key'), '0')
mock.read_return_none = True
self.assertRaises(memcached.MemcacheConnectionError,
memcache_client.decr, 'some_key', delta=15)
def test_retry(self):
logging.getLogger().addHandler(NullLoggingHandler())
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211', '1.2.3.5:11211'])
mock1 = ExplodingMockMemcached()
mock2 = MockMemcached()
memcache_client._client_cache['1.2.3.4:11211'] = [(mock2, mock2)]
memcache_client._client_cache['1.2.3.5:11211'] = [(mock1, mock1)]
memcache_client.set('some_key', [1, 2, 3])
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
self.assertEquals(mock1.exploded, True)
def test_delete(self):
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
mock = MockMemcached()
memcache_client._client_cache['1.2.3.4:11211'] = [(mock, mock)] * 2
memcache_client.set('some_key', [1, 2, 3])
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
memcache_client.delete('some_key')
self.assertEquals(memcache_client.get('some_key'), None)
def test_multi(self):
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
mock = MockMemcached()
memcache_client._client_cache['1.2.3.4:11211'] = [(mock, mock)] * 2
memcache_client.set_multi(
{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key')
self.assertEquals(
memcache_client.get_multi(('some_key2', 'some_key1'), 'multi_key'),
[[4, 5, 6], [1, 2, 3]])
esttimeout = time.time() + 10
memcache_client.set_multi(
{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key',
timeout=10)
self.assert_(-1 <= float(mock.cache.values()[0][1]) - esttimeout <= 1)
self.assert_(-1 <= float(mock.cache.values()[1][1]) - esttimeout <= 1)
self.assertEquals(memcache_client.get_multi(('some_key2', 'some_key1',
'not_exists'), 'multi_key'), [[4, 5, 6], [1, 2, 3], None])
def test_serialization(self):
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'],
allow_pickle=True)
mock = MockMemcached()
memcache_client._client_cache['1.2.3.4:11211'] = [(mock, mock)] * 2
memcache_client.set('some_key', [1, 2, 3])
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
memcache_client._allow_pickle = False
memcache_client._allow_unpickle = True
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
memcache_client._allow_unpickle = False
self.assertEquals(memcache_client.get('some_key'), None)
memcache_client.set('some_key', [1, 2, 3])
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
memcache_client._allow_unpickle = True
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
memcache_client._allow_pickle = True
self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
if __name__ == '__main__':
unittest.main()
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