530 lines
22 KiB
Python
530 lines
22 KiB
Python
# -*- coding:utf-8 -*-
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# Copyright (c) 2010-2012 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Tests for swift.common.utils"""
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from collections import defaultdict
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import logging
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import socket
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import time
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import unittest
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from uuid import uuid4
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from eventlet import GreenPool, sleep, Queue
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from eventlet.pools import Pool
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from swift.common import memcached
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from mock import patch, MagicMock
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from test.unit import NullLoggingHandler
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class MockedMemcachePool(memcached.MemcacheConnPool):
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def __init__(self, mocks):
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Pool.__init__(self, max_size=2)
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self.mocks = mocks
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# setting this for the eventlet workaround in the MemcacheConnPool
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self._parent_class_getter = super(memcached.MemcacheConnPool, self).get
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def create(self):
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return self.mocks.pop(0)
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class ExplodingMockMemcached(object):
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exploded = False
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def sendall(self, string):
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self.exploded = True
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raise socket.error()
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def readline(self):
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self.exploded = True
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raise socket.error()
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def read(self, size):
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self.exploded = True
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raise socket.error()
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def close(self):
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pass
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class MockMemcached(object):
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def __init__(self):
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self.inbuf = ''
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self.outbuf = ''
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self.cache = {}
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self.down = False
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self.exc_on_delete = False
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self.read_return_none = False
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self.close_called = False
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def sendall(self, string):
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if self.down:
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raise Exception('mock is down')
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self.inbuf += string
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while '\n' in self.inbuf:
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cmd, self.inbuf = self.inbuf.split('\n', 1)
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parts = cmd.split()
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if parts[0].lower() == 'set':
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self.cache[parts[1]] = parts[2], parts[3], \
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self.inbuf[:int(parts[4])]
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self.inbuf = self.inbuf[int(parts[4]) + 2:]
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if len(parts) < 6 or parts[5] != 'noreply':
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self.outbuf += 'STORED\r\n'
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elif parts[0].lower() == 'add':
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value = self.inbuf[:int(parts[4])]
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self.inbuf = self.inbuf[int(parts[4]) + 2:]
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if parts[1] in self.cache:
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if len(parts) < 6 or parts[5] != 'noreply':
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self.outbuf += 'NOT_STORED\r\n'
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else:
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self.cache[parts[1]] = parts[2], parts[3], value
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if len(parts) < 6 or parts[5] != 'noreply':
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self.outbuf += 'STORED\r\n'
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elif parts[0].lower() == 'delete':
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if self.exc_on_delete:
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raise Exception('mock is has exc_on_delete set')
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if parts[1] in self.cache:
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del self.cache[parts[1]]
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if 'noreply' not in parts:
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self.outbuf += 'DELETED\r\n'
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elif 'noreply' not in parts:
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self.outbuf += 'NOT_FOUND\r\n'
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elif parts[0].lower() == 'get':
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for key in parts[1:]:
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if key in self.cache:
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val = self.cache[key]
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self.outbuf += 'VALUE %s %s %s\r\n' % (
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key, val[0], len(val[2]))
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self.outbuf += val[2] + '\r\n'
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self.outbuf += 'END\r\n'
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elif parts[0].lower() == 'incr':
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if parts[1] in self.cache:
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val = list(self.cache[parts[1]])
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val[2] = str(int(val[2]) + int(parts[2]))
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self.cache[parts[1]] = val
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self.outbuf += str(val[2]) + '\r\n'
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else:
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self.outbuf += 'NOT_FOUND\r\n'
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elif parts[0].lower() == 'decr':
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if parts[1] in self.cache:
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val = list(self.cache[parts[1]])
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if int(val[2]) - int(parts[2]) > 0:
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val[2] = str(int(val[2]) - int(parts[2]))
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else:
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val[2] = '0'
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self.cache[parts[1]] = val
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self.outbuf += str(val[2]) + '\r\n'
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else:
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self.outbuf += 'NOT_FOUND\r\n'
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def readline(self):
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if self.read_return_none:
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return None
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if self.down:
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raise Exception('mock is down')
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if '\n' in self.outbuf:
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response, self.outbuf = self.outbuf.split('\n', 1)
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return response + '\n'
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def read(self, size):
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if self.down:
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raise Exception('mock is down')
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if len(self.outbuf) >= size:
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response = self.outbuf[:size]
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self.outbuf = self.outbuf[size:]
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return response
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def close(self):
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self.close_called = True
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pass
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class TestMemcached(unittest.TestCase):
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"""Tests for swift.common.memcached"""
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def test_get_conns(self):
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sock1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock1.bind(('127.0.0.1', 0))
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sock1.listen(1)
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sock1ipport = '%s:%s' % sock1.getsockname()
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sock2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock2.bind(('127.0.0.1', 0))
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sock2.listen(1)
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orig_port = memcached.DEFAULT_MEMCACHED_PORT
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try:
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sock2ip, memcached.DEFAULT_MEMCACHED_PORT = sock2.getsockname()
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sock2ipport = '%s:%s' % (sock2ip, memcached.DEFAULT_MEMCACHED_PORT)
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# We're deliberately using sock2ip (no port) here to test that the
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# default port is used.
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memcache_client = memcached.MemcacheRing([sock1ipport, sock2ip])
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one = two = True
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while one or two: # Run until we match hosts one and two
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key = uuid4().hex
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for conn in memcache_client._get_conns(key):
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peeripport = '%s:%s' % conn[2].getpeername()
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self.assert_(peeripport in (sock1ipport, sock2ipport))
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if peeripport == sock1ipport:
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one = False
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if peeripport == sock2ipport:
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two = False
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finally:
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memcached.DEFAULT_MEMCACHED_PORT = orig_port
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def test_set_get(self):
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
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mock = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock, mock)] * 2)
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memcache_client.set('some_key', [1, 2, 3])
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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self.assertEquals(mock.cache.values()[0][1], '0')
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memcache_client.set('some_key', [4, 5, 6])
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self.assertEquals(memcache_client.get('some_key'), [4, 5, 6])
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memcache_client.set('some_key', ['simple str', 'utf8 str éà'])
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# As per http://wiki.openstack.org/encoding,
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# we should expect to have unicode
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self.assertEquals(
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memcache_client.get('some_key'), ['simple str', u'utf8 str éà'])
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self.assert_(float(mock.cache.values()[0][1]) == 0)
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memcache_client.set('some_key', [1, 2, 3], timeout=10)
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self.assertEquals(mock.cache.values()[0][1], '10')
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memcache_client.set('some_key', [1, 2, 3], time=20)
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self.assertEquals(mock.cache.values()[0][1], '20')
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sixtydays = 60 * 24 * 60 * 60
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esttimeout = time.time() + sixtydays
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memcache_client.set('some_key', [1, 2, 3], timeout=sixtydays)
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self.assert_(-1 <= float(mock.cache.values()[0][1]) - esttimeout <= 1)
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memcache_client.set('some_key', [1, 2, 3], time=sixtydays)
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self.assert_(-1 <= float(mock.cache.values()[0][1]) - esttimeout <= 1)
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def test_incr(self):
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
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mock = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock, mock)] * 2)
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self.assertEquals(memcache_client.incr('some_key', delta=5), 5)
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self.assertEquals(memcache_client.get('some_key'), '5')
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self.assertEquals(memcache_client.incr('some_key', delta=5), 10)
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self.assertEquals(memcache_client.get('some_key'), '10')
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self.assertEquals(memcache_client.incr('some_key', delta=1), 11)
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self.assertEquals(memcache_client.get('some_key'), '11')
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self.assertEquals(memcache_client.incr('some_key', delta=-5), 6)
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self.assertEquals(memcache_client.get('some_key'), '6')
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self.assertEquals(memcache_client.incr('some_key', delta=-15), 0)
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self.assertEquals(memcache_client.get('some_key'), '0')
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mock.read_return_none = True
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self.assertRaises(memcached.MemcacheConnectionError,
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memcache_client.incr, 'some_key', delta=-15)
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self.assertTrue(mock.close_called)
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def test_incr_w_timeout(self):
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
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mock = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock, mock)] * 2)
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memcache_client.incr('some_key', delta=5, time=55)
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self.assertEquals(memcache_client.get('some_key'), '5')
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self.assertEquals(mock.cache.values()[0][1], '55')
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memcache_client.delete('some_key')
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self.assertEquals(memcache_client.get('some_key'), None)
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fiftydays = 50 * 24 * 60 * 60
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esttimeout = time.time() + fiftydays
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memcache_client.incr('some_key', delta=5, time=fiftydays)
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self.assertEquals(memcache_client.get('some_key'), '5')
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self.assert_(-1 <= float(mock.cache.values()[0][1]) - esttimeout <= 1)
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memcache_client.delete('some_key')
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self.assertEquals(memcache_client.get('some_key'), None)
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memcache_client.incr('some_key', delta=5)
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self.assertEquals(memcache_client.get('some_key'), '5')
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self.assertEquals(mock.cache.values()[0][1], '0')
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memcache_client.incr('some_key', delta=5, time=55)
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self.assertEquals(memcache_client.get('some_key'), '10')
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self.assertEquals(mock.cache.values()[0][1], '0')
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def test_decr(self):
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
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mock = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock, mock)] * 2)
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self.assertEquals(memcache_client.decr('some_key', delta=5), 0)
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self.assertEquals(memcache_client.get('some_key'), '0')
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self.assertEquals(memcache_client.incr('some_key', delta=15), 15)
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self.assertEquals(memcache_client.get('some_key'), '15')
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self.assertEquals(memcache_client.decr('some_key', delta=4), 11)
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self.assertEquals(memcache_client.get('some_key'), '11')
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self.assertEquals(memcache_client.decr('some_key', delta=15), 0)
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self.assertEquals(memcache_client.get('some_key'), '0')
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mock.read_return_none = True
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self.assertRaises(memcached.MemcacheConnectionError,
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memcache_client.decr, 'some_key', delta=15)
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def test_retry(self):
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logging.getLogger().addHandler(NullLoggingHandler())
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memcache_client = memcached.MemcacheRing(
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['1.2.3.4:11211', '1.2.3.5:11211'])
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mock1 = ExplodingMockMemcached()
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mock2 = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock2, mock2)])
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memcache_client._client_cache['1.2.3.5:11211'] = MockedMemcachePool(
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[(mock1, mock1)])
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memcache_client.set('some_key', [1, 2, 3])
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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self.assertEquals(mock1.exploded, True)
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def test_delete(self):
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
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mock = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock, mock)] * 2)
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memcache_client.set('some_key', [1, 2, 3])
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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memcache_client.delete('some_key')
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self.assertEquals(memcache_client.get('some_key'), None)
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def test_multi(self):
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
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mock = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock, mock)] * 2)
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memcache_client.set_multi(
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{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key')
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self.assertEquals(
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memcache_client.get_multi(('some_key2', 'some_key1'), 'multi_key'),
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[[4, 5, 6], [1, 2, 3]])
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self.assertEquals(mock.cache.values()[0][1], '0')
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self.assertEquals(mock.cache.values()[1][1], '0')
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memcache_client.set_multi(
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{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key',
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timeout=10)
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self.assertEquals(mock.cache.values()[0][1], '10')
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self.assertEquals(mock.cache.values()[1][1], '10')
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memcache_client.set_multi(
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{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key',
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time=20)
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self.assertEquals(mock.cache.values()[0][1], '20')
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self.assertEquals(mock.cache.values()[1][1], '20')
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fortydays = 50 * 24 * 60 * 60
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esttimeout = time.time() + fortydays
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memcache_client.set_multi(
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{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key',
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timeout=fortydays)
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self.assert_(-1 <= float(mock.cache.values()[0][1]) - esttimeout <= 1)
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self.assert_(-1 <= float(mock.cache.values()[1][1]) - esttimeout <= 1)
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self.assertEquals(memcache_client.get_multi(
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('some_key2', 'some_key1', 'not_exists'), 'multi_key'),
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[[4, 5, 6], [1, 2, 3], None])
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def test_serialization(self):
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'],
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allow_pickle=True)
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mock = MockMemcached()
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memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
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[(mock, mock)] * 2)
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memcache_client.set('some_key', [1, 2, 3])
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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memcache_client._allow_pickle = False
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memcache_client._allow_unpickle = True
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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memcache_client._allow_unpickle = False
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self.assertEquals(memcache_client.get('some_key'), None)
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memcache_client.set('some_key', [1, 2, 3])
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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memcache_client._allow_unpickle = True
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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memcache_client._allow_pickle = True
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self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
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def test_connection_pooling(self):
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with patch('swift.common.memcached.socket') as mock_module:
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# patch socket, stub socket.socket, mock sock
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mock_sock = mock_module.socket.return_value
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# track clients waiting for connections
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connected = []
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connections = Queue()
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errors = []
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def wait_connect(addr):
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connected.append(addr)
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sleep(0.1) # yield
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val = connections.get()
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if val is not None:
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errors.append(val)
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mock_sock.connect = wait_connect
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memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'],
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connect_timeout=10)
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# sanity
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self.assertEquals(1, len(memcache_client._client_cache))
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for server, pool in memcache_client._client_cache.items():
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self.assertEqual(2, pool.max_size)
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# make 10 requests "at the same time"
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p = GreenPool()
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for i in range(10):
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p.spawn(memcache_client.set, 'key', 'value')
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for i in range(3):
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sleep(0.1)
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self.assertEqual(2, len(connected))
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# give out a connection
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connections.put(None)
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# at this point, only one connection should have actually been
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# created, the other is in the creation step, and the rest of the
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# clients are not attempting to connect. we let this play out a
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# bit to verify.
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for i in range(3):
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sleep(0.1)
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self.assertEqual(2, len(connected))
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# finish up, this allows the final connection to be created, so
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# that all the other clients can use the two existing connections
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# and no others will be created.
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connections.put(None)
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connections.put('nono')
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self.assertEqual(2, len(connected))
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p.waitall()
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self.assertEqual(2, len(connected))
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self.assertEqual(0, len(errors),
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"A client was allowed a third connection")
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connections.get_nowait()
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self.assertTrue(connections.empty())
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# Ensure we exercise the backported-for-pre-eventlet-version-0.9.17 get()
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# code, even if the executing eventlet's version is already newer.
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@patch.object(memcached, 'eventlet_version', '0.9.16')
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def test_connection_pooling_pre_0_9_17(self):
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with patch('swift.common.memcached.socket') as mock_module:
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connected = []
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count = [0]
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def _slow_yielding_connector(addr):
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count[0] += 1
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if count[0] % 3 == 0:
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raise ValueError('whoops!')
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sleep(0.1)
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connected.append(addr)
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mock_module.socket.return_value.connect.side_effect = \
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_slow_yielding_connector
|
|
|
|
# If POOL_SIZE is not small enough relative to USER_COUNT, the
|
|
# "free_items" business in the eventlet.pools.Pool will cause
|
|
# spurious failures below. I found these values to work well on a
|
|
# VM running in VirtualBox on a late 2013 Retina MacbookPro:
|
|
POOL_SIZE = 5
|
|
USER_COUNT = 50
|
|
|
|
pool = memcached.MemcacheConnPool('1.2.3.4:11211', size=POOL_SIZE,
|
|
connect_timeout=10)
|
|
self.assertEqual(POOL_SIZE, pool.max_size)
|
|
|
|
def _user():
|
|
got = None
|
|
while not got:
|
|
try:
|
|
got = pool.get()
|
|
except: # noqa
|
|
pass
|
|
pool.put(got)
|
|
|
|
# make a bunch of requests "at the same time"
|
|
p = GreenPool()
|
|
for i in range(USER_COUNT):
|
|
p.spawn(_user)
|
|
p.waitall()
|
|
|
|
# If the except block after the "created = self.create()" call
|
|
# doesn't correctly decrement self.current_size, this test will
|
|
# fail by having some number less than POOL_SIZE connections (in my
|
|
# testing, anyway).
|
|
self.assertEqual(POOL_SIZE, len(connected))
|
|
|
|
# Subsequent requests should get and use the existing
|
|
# connections, not creating any more.
|
|
for i in range(USER_COUNT):
|
|
p.spawn(_user)
|
|
p.waitall()
|
|
|
|
self.assertEqual(POOL_SIZE, len(connected))
|
|
|
|
def test_connection_pool_timeout(self):
|
|
orig_conn_pool = memcached.MemcacheConnPool
|
|
try:
|
|
connections = defaultdict(Queue)
|
|
pending = defaultdict(int)
|
|
served = defaultdict(int)
|
|
|
|
class MockConnectionPool(orig_conn_pool):
|
|
def get(self):
|
|
pending[self.server] += 1
|
|
conn = connections[self.server].get()
|
|
pending[self.server] -= 1
|
|
return conn
|
|
|
|
def put(self, *args, **kwargs):
|
|
connections[self.server].put(*args, **kwargs)
|
|
served[self.server] += 1
|
|
|
|
memcached.MemcacheConnPool = MockConnectionPool
|
|
|
|
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211',
|
|
'1.2.3.5:11211'],
|
|
io_timeout=0.5,
|
|
pool_timeout=0.1)
|
|
|
|
# Hand out a couple slow connections to 1.2.3.5, leaving 1.2.3.4
|
|
# fast. All ten (10) clients should try to talk to .5 first, and
|
|
# then move on to .4, and we'll assert all that below.
|
|
mock_conn = MagicMock(), MagicMock()
|
|
mock_conn[1].sendall = lambda x: sleep(0.2)
|
|
connections['1.2.3.5:11211'].put(mock_conn)
|
|
connections['1.2.3.5:11211'].put(mock_conn)
|
|
|
|
mock_conn = MagicMock(), MagicMock()
|
|
connections['1.2.3.4:11211'].put(mock_conn)
|
|
connections['1.2.3.4:11211'].put(mock_conn)
|
|
|
|
p = GreenPool()
|
|
for i in range(10):
|
|
p.spawn(memcache_client.set, 'key', 'value')
|
|
|
|
# Wait for the dust to settle.
|
|
p.waitall()
|
|
|
|
self.assertEqual(pending['1.2.3.5:11211'], 8)
|
|
self.assertEqual(len(memcache_client._errors['1.2.3.5:11211']), 8)
|
|
self.assertEqual(served['1.2.3.5:11211'], 2)
|
|
self.assertEqual(pending['1.2.3.4:11211'], 0)
|
|
self.assertEqual(len(memcache_client._errors['1.2.3.4:11211']), 0)
|
|
self.assertEqual(served['1.2.3.4:11211'], 8)
|
|
|
|
# and we never got more put in that we gave out
|
|
self.assertEqual(connections['1.2.3.5:11211'].qsize(), 2)
|
|
self.assertEqual(connections['1.2.3.4:11211'].qsize(), 2)
|
|
finally:
|
|
memcached.MemcacheConnPool = orig_conn_pool
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|