701 lines
29 KiB
Python
701 lines
29 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 errno
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from hashlib import md5
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import six
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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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import os
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import mock
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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 debug_logger
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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(errno.EPIPE, os.strerror(errno.EPIPE))
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def readline(self):
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self.exploded = True
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raise socket.error(errno.EPIPE, os.strerror(errno.EPIPE))
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def read(self, size):
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self.exploded = True
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raise socket.error(errno.EPIPE, os.strerror(errno.EPIPE))
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def close(self):
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pass
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class MockMemcached(object):
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# See https://github.com/memcached/memcached/blob/master/doc/protocol.txt
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# In particular, the "Storage commands" section may be interesting.
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def __init__(self):
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self.inbuf = b''
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self.outbuf = b''
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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.read_return_empty_str = 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 b'\n' in self.inbuf:
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cmd, self.inbuf = self.inbuf.split(b'\n', 1)
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parts = cmd.split()
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cmd_name = parts[0].decode('ascii').lower()
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handler = getattr(self, 'handle_%s' % cmd_name, None)
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if handler:
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handler(*parts[1:])
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else:
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raise ValueError('Unhandled command: %s' % parts[0])
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def handle_set(self, key, flags, exptime, num_bytes, noreply=b''):
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self.cache[key] = flags, exptime, self.inbuf[:int(num_bytes)]
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self.inbuf = self.inbuf[int(num_bytes) + 2:]
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if noreply != b'noreply':
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self.outbuf += b'STORED\r\n'
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def handle_add(self, key, flags, exptime, num_bytes, noreply=b''):
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value = self.inbuf[:int(num_bytes)]
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self.inbuf = self.inbuf[int(num_bytes) + 2:]
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if key in self.cache:
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if noreply != b'noreply':
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self.outbuf += b'NOT_STORED\r\n'
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else:
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self.cache[key] = flags, exptime, value
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if noreply != b'noreply':
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self.outbuf += b'STORED\r\n'
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def handle_delete(self, key, noreply=b''):
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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 key in self.cache:
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del self.cache[key]
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if noreply != b'noreply':
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self.outbuf += b'DELETED\r\n'
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elif noreply != b'noreply':
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self.outbuf += b'NOT_FOUND\r\n'
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def handle_get(self, *keys):
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for key in keys:
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if key in self.cache:
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val = self.cache[key]
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self.outbuf += b' '.join([
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b'VALUE',
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key,
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val[0],
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str(len(val[2])).encode('ascii')
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]) + b'\r\n'
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self.outbuf += val[2] + b'\r\n'
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self.outbuf += b'END\r\n'
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def handle_incr(self, key, value, noreply=b''):
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if key in self.cache:
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current = self.cache[key][2]
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new_val = str(int(current) + int(value)).encode('ascii')
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self.cache[key] = self.cache[key][:2] + (new_val, )
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self.outbuf += new_val + b'\r\n'
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else:
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self.outbuf += b'NOT_FOUND\r\n'
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def handle_decr(self, key, value, noreply=b''):
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if key in self.cache:
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current = self.cache[key][2]
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new_val = str(int(current) - int(value)).encode('ascii')
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if new_val[:1] == b'-': # ie, val is negative
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new_val = b'0'
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self.cache[key] = self.cache[key][:2] + (new_val, )
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self.outbuf += new_val + b'\r\n'
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else:
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self.outbuf += b'NOT_FOUND\r\n'
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def readline(self):
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if self.read_return_empty_str:
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return b''
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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 b'\n' in self.outbuf:
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response, self.outbuf = self.outbuf.split(b'\n', 1)
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return response + b'\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 setUp(self):
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self.logger = debug_logger()
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patcher = mock.patch('swift.common.memcached.logging', self.logger)
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self.addCleanup(patcher.stop)
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patcher.start()
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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.encode('ascii')
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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.assertTrue(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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self.assertEqual(len(memcache_client._errors[sock1ipport]), 0)
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self.assertEqual(len(memcache_client._errors[sock2ip]), 0)
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finally:
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memcached.DEFAULT_MEMCACHED_PORT = orig_port
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def test_get_conns_v6(self):
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if not socket.has_ipv6:
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return
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try:
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sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
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sock.bind(('::1', 0, 0, 0))
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sock.listen(1)
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sock_addr = sock.getsockname()
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server_socket = '[%s]:%s' % (sock_addr[0], sock_addr[1])
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memcache_client = memcached.MemcacheRing([server_socket])
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key = uuid4().hex.encode('ascii')
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for conn in memcache_client._get_conns(key):
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peer_sockaddr = conn[2].getpeername()
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peer_socket = '[%s]:%s' % (peer_sockaddr[0], peer_sockaddr[1])
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self.assertEqual(peer_socket, server_socket)
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self.assertEqual(len(memcache_client._errors[server_socket]), 0)
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finally:
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sock.close()
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def test_get_conns_v6_default(self):
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if not socket.has_ipv6:
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return
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try:
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sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
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sock.bind(('::1', 0))
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sock.listen(1)
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sock_addr = sock.getsockname()
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server_socket = '[%s]:%s' % (sock_addr[0], sock_addr[1])
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server_host = '[%s]' % sock_addr[0]
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memcached.DEFAULT_MEMCACHED_PORT = sock_addr[1]
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memcache_client = memcached.MemcacheRing([server_host])
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key = uuid4().hex.encode('ascii')
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for conn in memcache_client._get_conns(key):
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peer_sockaddr = conn[2].getpeername()
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peer_socket = '[%s]:%s' % (peer_sockaddr[0], peer_sockaddr[1])
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self.assertEqual(peer_socket, server_socket)
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self.assertEqual(len(memcache_client._errors[server_host]), 0)
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finally:
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sock.close()
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def test_get_conns_bad_v6(self):
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with self.assertRaises(ValueError):
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# IPv6 address with missing [] is invalid
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server_socket = '%s:%s' % ('::1', 11211)
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memcached.MemcacheRing([server_socket])
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def test_get_conns_hostname(self):
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with patch('swift.common.memcached.socket.getaddrinfo') as addrinfo:
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.bind(('127.0.0.1', 0))
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sock.listen(1)
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sock_addr = sock.getsockname()
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fqdn = socket.getfqdn()
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server_socket = '%s:%s' % (fqdn, sock_addr[1])
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addrinfo.return_value = [(socket.AF_INET,
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socket.SOCK_STREAM, 0, '',
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('127.0.0.1', sock_addr[1]))]
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memcache_client = memcached.MemcacheRing([server_socket])
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key = uuid4().hex.encode('ascii')
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for conn in memcache_client._get_conns(key):
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peer_sockaddr = conn[2].getpeername()
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peer_socket = '%s:%s' % (peer_sockaddr[0],
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peer_sockaddr[1])
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self.assertEqual(peer_socket,
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'127.0.0.1:%d' % sock_addr[1])
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self.assertEqual(len(memcache_client._errors[server_socket]),
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0)
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finally:
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sock.close()
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def test_get_conns_hostname6(self):
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with patch('swift.common.memcached.socket.getaddrinfo') as addrinfo:
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try:
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sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
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sock.bind(('::1', 0))
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sock.listen(1)
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sock_addr = sock.getsockname()
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fqdn = socket.getfqdn()
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server_socket = '%s:%s' % (fqdn, sock_addr[1])
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addrinfo.return_value = [(socket.AF_INET6,
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socket.SOCK_STREAM, 0, '',
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('::1', sock_addr[1]))]
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memcache_client = memcached.MemcacheRing([server_socket])
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key = uuid4().hex.encode('ascii')
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for conn in memcache_client._get_conns(key):
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peer_sockaddr = conn[2].getpeername()
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peer_socket = '[%s]:%s' % (peer_sockaddr[0],
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peer_sockaddr[1])
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self.assertEqual(peer_socket, '[::1]:%d' % sock_addr[1])
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self.assertEqual(len(memcache_client._errors[server_socket]),
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0)
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finally:
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sock.close()
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def test_set_get_json(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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cache_key = md5(b'some_key').hexdigest().encode('ascii')
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memcache_client.set('some_key', [1, 2, 3])
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self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
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# See JSON_FLAG
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self.assertEqual(mock.cache, {cache_key: (b'2', b'0', b'[1, 2, 3]')})
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memcache_client.set('some_key', [4, 5, 6])
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self.assertEqual(memcache_client.get('some_key'), [4, 5, 6])
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self.assertEqual(mock.cache, {cache_key: (b'2', b'0', b'[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.assertEqual(
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memcache_client.get('some_key'), ['simple str', u'utf8 str éà'])
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self.assertEqual(mock.cache, {cache_key: (
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b'2', b'0', b'["simple str", "utf8 str \\u00e9\\u00e0"]')})
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memcache_client.set('some_key', [1, 2, 3], time=20)
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self.assertEqual(mock.cache, {cache_key: (b'2', b'20', b'[1, 2, 3]')})
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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], time=sixtydays)
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_junk, cache_timeout, _junk = mock.cache[cache_key]
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self.assertAlmostEqual(float(cache_timeout), esttimeout, delta=1)
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def test_get_failed_connection_mid_request(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.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
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self.assertEqual(list(mock.cache.values()),
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[(b'2', b'0', b'[1, 2, 3]')])
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# Now lets return an empty string, and make sure we aren't logging
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# the error.
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fake_stdout = six.StringIO()
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# force the logging through the DebugLogger instead of the nose
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# handler. This will use stdout, so we can assert that no stack trace
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# is logged.
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logger = debug_logger()
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with patch("sys.stdout", fake_stdout),\
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patch('swift.common.memcached.logging', logger):
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mock.read_return_empty_str = True
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self.assertIsNone(memcache_client.get('some_key'))
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log_lines = logger.get_lines_for_level('error')
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self.assertIn('Error talking to memcached', log_lines[0])
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self.assertFalse(log_lines[1:])
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self.assertNotIn("Traceback", fake_stdout.getvalue())
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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.assertEqual(memcache_client.incr('some_key', delta=5), 5)
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self.assertEqual(memcache_client.get('some_key'), b'5')
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self.assertEqual(memcache_client.incr('some_key', delta=5), 10)
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self.assertEqual(memcache_client.get('some_key'), b'10')
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self.assertEqual(memcache_client.incr('some_key', delta=1), 11)
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self.assertEqual(memcache_client.get('some_key'), b'11')
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self.assertEqual(memcache_client.incr('some_key', delta=-5), 6)
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self.assertEqual(memcache_client.get('some_key'), b'6')
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self.assertEqual(memcache_client.incr('some_key', delta=-15), 0)
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self.assertEqual(memcache_client.get('some_key'), b'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_failed_connection_mid_request(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.assertEqual(memcache_client.incr('some_key', delta=5), 5)
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self.assertEqual(memcache_client.get('some_key'), b'5')
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self.assertEqual(memcache_client.incr('some_key', delta=5), 10)
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self.assertEqual(memcache_client.get('some_key'), b'10')
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# Now lets return an empty string, and make sure we aren't logging
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# the error.
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fake_stdout = six.StringIO()
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# force the logging through the DebugLogger instead of the nose
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# handler. This will use stdout, so we can assert that no stack trace
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# is logged.
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logger = debug_logger()
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with patch("sys.stdout", fake_stdout), \
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patch('swift.common.memcached.logging', logger):
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mock.read_return_empty_str = True
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self.assertRaises(memcached.MemcacheConnectionError,
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memcache_client.incr, 'some_key', delta=1)
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log_lines = logger.get_lines_for_level('error')
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self.assertIn('Error talking to memcached', log_lines[0])
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self.assertFalse(log_lines[1:])
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self.assertNotIn('Traceback', fake_stdout.getvalue())
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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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cache_key = md5(b'some_key').hexdigest().encode('ascii')
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memcache_client.incr('some_key', delta=5, time=55)
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self.assertEqual(memcache_client.get('some_key'), b'5')
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self.assertEqual(mock.cache, {cache_key: (b'0', b'55', b'5')})
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memcache_client.delete('some_key')
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self.assertIsNone(memcache_client.get('some_key'))
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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)
|
|
self.assertEqual(memcache_client.get('some_key'), b'5')
|
|
_junk, cache_timeout, _junk = mock.cache[cache_key]
|
|
self.assertAlmostEqual(float(cache_timeout), esttimeout, delta=1)
|
|
|
|
memcache_client.delete('some_key')
|
|
self.assertIsNone(memcache_client.get('some_key'))
|
|
|
|
memcache_client.incr('some_key', delta=5)
|
|
self.assertEqual(memcache_client.get('some_key'), b'5')
|
|
self.assertEqual(mock.cache, {cache_key: (b'0', b'0', b'5')})
|
|
|
|
memcache_client.incr('some_key', delta=5, time=55)
|
|
self.assertEqual(memcache_client.get('some_key'), b'10')
|
|
self.assertEqual(mock.cache, {cache_key: (b'0', b'0', b'10')})
|
|
|
|
def test_decr(self):
|
|
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
|
|
mock = MockMemcached()
|
|
memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
|
|
[(mock, mock)] * 2)
|
|
self.assertEqual(memcache_client.decr('some_key', delta=5), 0)
|
|
self.assertEqual(memcache_client.get('some_key'), b'0')
|
|
self.assertEqual(memcache_client.incr('some_key', delta=15), 15)
|
|
self.assertEqual(memcache_client.get('some_key'), b'15')
|
|
self.assertEqual(memcache_client.decr('some_key', delta=4), 11)
|
|
self.assertEqual(memcache_client.get('some_key'), b'11')
|
|
self.assertEqual(memcache_client.decr('some_key', delta=15), 0)
|
|
self.assertEqual(memcache_client.get('some_key'), b'0')
|
|
mock.read_return_none = True
|
|
self.assertRaises(memcached.MemcacheConnectionError,
|
|
memcache_client.decr, 'some_key', delta=15)
|
|
|
|
def test_retry(self):
|
|
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'] = MockedMemcachePool(
|
|
[(mock2, mock2)])
|
|
memcache_client._client_cache['1.2.3.5:11211'] = MockedMemcachePool(
|
|
[(mock1, mock1), (mock1, mock1)])
|
|
memcache_client.set('some_key', [1, 2, 3])
|
|
self.assertEqual(mock1.exploded, True)
|
|
self.assertEqual(self.logger.get_lines_for_level('error'), [
|
|
'Error talking to memcached: 1.2.3.5:11211: '
|
|
'[Errno 32] Broken pipe',
|
|
])
|
|
|
|
self.logger.clear()
|
|
mock1.exploded = False
|
|
self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
|
|
self.assertEqual(mock1.exploded, True)
|
|
self.assertEqual(self.logger.get_lines_for_level('error'), [
|
|
'Error talking to memcached: 1.2.3.5:11211: '
|
|
'[Errno 32] Broken pipe',
|
|
])
|
|
# Check that we really did call create() twice
|
|
self.assertEqual(memcache_client._client_cache['1.2.3.5:11211'].mocks,
|
|
[])
|
|
|
|
def test_delete(self):
|
|
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
|
|
mock = MockMemcached()
|
|
memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
|
|
[(mock, mock)] * 2)
|
|
memcache_client.set('some_key', [1, 2, 3])
|
|
self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
|
|
memcache_client.delete('some_key')
|
|
self.assertIsNone(memcache_client.get('some_key'))
|
|
|
|
def test_multi(self):
|
|
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'])
|
|
mock = MockMemcached()
|
|
memcache_client._client_cache['1.2.3.4:11211'] = MockedMemcachePool(
|
|
[(mock, mock)] * 2)
|
|
|
|
memcache_client.set_multi(
|
|
{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key')
|
|
self.assertEqual(
|
|
memcache_client.get_multi(('some_key2', 'some_key1'), 'multi_key'),
|
|
[[4, 5, 6], [1, 2, 3]])
|
|
for key in (b'some_key1', b'some_key2'):
|
|
key = md5(key).hexdigest().encode('ascii')
|
|
self.assertIn(key, mock.cache)
|
|
_junk, cache_timeout, _junk = mock.cache[key]
|
|
self.assertEqual(cache_timeout, b'0')
|
|
|
|
memcache_client.set_multi(
|
|
{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key',
|
|
time=20)
|
|
for key in (b'some_key1', b'some_key2'):
|
|
key = md5(key).hexdigest().encode('ascii')
|
|
_junk, cache_timeout, _junk = mock.cache[key]
|
|
self.assertEqual(cache_timeout, b'20')
|
|
|
|
fortydays = 50 * 24 * 60 * 60
|
|
esttimeout = time.time() + fortydays
|
|
memcache_client.set_multi(
|
|
{'some_key1': [1, 2, 3], 'some_key2': [4, 5, 6]}, 'multi_key',
|
|
time=fortydays)
|
|
for key in (b'some_key1', b'some_key2'):
|
|
key = md5(key).hexdigest().encode('ascii')
|
|
_junk, cache_timeout, _junk = mock.cache[key]
|
|
self.assertAlmostEqual(float(cache_timeout), esttimeout, delta=1)
|
|
self.assertEqual(memcache_client.get_multi(
|
|
('some_key2', 'some_key1', 'not_exists'), 'multi_key'),
|
|
[[4, 5, 6], [1, 2, 3], None])
|
|
|
|
# Now lets simulate a lost connection and make sure we don't get
|
|
# the index out of range stack trace when it does
|
|
mock_stderr = six.StringIO()
|
|
not_expected = "IndexError: list index out of range"
|
|
with patch("sys.stderr", mock_stderr):
|
|
mock.read_return_empty_str = True
|
|
self.assertEqual(memcache_client.get_multi(
|
|
('some_key2', 'some_key1', 'not_exists'), 'multi_key'),
|
|
None)
|
|
self.assertFalse(not_expected in mock_stderr.getvalue())
|
|
|
|
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'] = MockedMemcachePool(
|
|
[(mock, mock)] * 2)
|
|
memcache_client.set('some_key', [1, 2, 3])
|
|
self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
|
|
memcache_client._allow_pickle = False
|
|
memcache_client._allow_unpickle = True
|
|
self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
|
|
memcache_client._allow_unpickle = False
|
|
self.assertIsNone(memcache_client.get('some_key'))
|
|
memcache_client.set('some_key', [1, 2, 3])
|
|
self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
|
|
memcache_client._allow_unpickle = True
|
|
self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
|
|
memcache_client._allow_pickle = True
|
|
self.assertEqual(memcache_client.get('some_key'), [1, 2, 3])
|
|
|
|
def test_connection_pooling(self):
|
|
with patch('swift.common.memcached.socket') as mock_module:
|
|
def mock_getaddrinfo(host, port, family=socket.AF_INET,
|
|
socktype=socket.SOCK_STREAM, proto=0,
|
|
flags=0):
|
|
return [(family, socktype, proto, '', (host, port))]
|
|
|
|
mock_module.getaddrinfo = mock_getaddrinfo
|
|
|
|
# patch socket, stub socket.socket, mock sock
|
|
mock_sock = mock_module.socket.return_value
|
|
|
|
# track clients waiting for connections
|
|
connected = []
|
|
connections = Queue()
|
|
errors = []
|
|
|
|
def wait_connect(addr):
|
|
connected.append(addr)
|
|
sleep(0.1) # yield
|
|
val = connections.get()
|
|
if val is not None:
|
|
errors.append(val)
|
|
|
|
mock_sock.connect = wait_connect
|
|
|
|
memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'],
|
|
connect_timeout=10)
|
|
# sanity
|
|
self.assertEqual(1, len(memcache_client._client_cache))
|
|
for server, pool in memcache_client._client_cache.items():
|
|
self.assertEqual(2, pool.max_size)
|
|
|
|
# make 10 requests "at the same time"
|
|
p = GreenPool()
|
|
for i in range(10):
|
|
p.spawn(memcache_client.set, 'key', 'value')
|
|
for i in range(3):
|
|
sleep(0.1)
|
|
self.assertEqual(2, len(connected))
|
|
|
|
# give out a connection
|
|
connections.put(None)
|
|
|
|
# at this point, only one connection should have actually been
|
|
# created, the other is in the creation step, and the rest of the
|
|
# clients are not attempting to connect. we let this play out a
|
|
# bit to verify.
|
|
for i in range(3):
|
|
sleep(0.1)
|
|
self.assertEqual(2, len(connected))
|
|
|
|
# finish up, this allows the final connection to be created, so
|
|
# that all the other clients can use the two existing connections
|
|
# and no others will be created.
|
|
connections.put(None)
|
|
connections.put('nono')
|
|
self.assertEqual(2, len(connected))
|
|
p.waitall()
|
|
self.assertEqual(2, len(connected))
|
|
self.assertEqual(0, len(errors),
|
|
"A client was allowed a third connection")
|
|
connections.get_nowait()
|
|
self.assertTrue(connections.empty())
|
|
|
|
def test_connection_pool_timeout(self):
|
|
connections = defaultdict(Queue)
|
|
pending = defaultdict(int)
|
|
served = defaultdict(int)
|
|
|
|
class MockConnectionPool(memcached.MemcacheConnPool):
|
|
def get(self):
|
|
pending[self.host] += 1
|
|
conn = connections[self.host].get()
|
|
pending[self.host] -= 1
|
|
return conn
|
|
|
|
def put(self, *args, **kwargs):
|
|
connections[self.host].put(*args, **kwargs)
|
|
served[self.host] += 1
|
|
|
|
with mock.patch.object(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'].put(mock_conn)
|
|
connections['1.2.3.5'].put(mock_conn)
|
|
|
|
mock_conn = MagicMock(), MagicMock()
|
|
connections['1.2.3.4'].put(mock_conn)
|
|
connections['1.2.3.4'].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'], 8)
|
|
self.assertEqual(len(memcache_client._errors['1.2.3.5:11211']), 8)
|
|
self.assertEqual(
|
|
self.logger.get_lines_for_level('error'),
|
|
['Timeout getting a connection to memcached: 1.2.3.5:11211'] * 8)
|
|
self.assertEqual(served['1.2.3.5'], 2)
|
|
self.assertEqual(pending['1.2.3.4'], 0)
|
|
self.assertEqual(len(memcache_client._errors['1.2.3.4:11211']), 0)
|
|
self.assertEqual(served['1.2.3.4'], 8)
|
|
|
|
# and we never got more put in that we gave out
|
|
self.assertEqual(connections['1.2.3.5'].qsize(), 2)
|
|
self.assertEqual(connections['1.2.3.4'].qsize(), 2)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|