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#
# Copyright 2008 The ndb Authors. All Rights Reserved.
#
# 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 context.py."""
import logging
import random
import socket
import threading
import time
from .google_imports import apiproxy_errors
from .google_imports import datastore
from .google_imports import datastore_errors
from .google_imports import datastore_pbs
from .google_imports import datastore_rpc
from .google_imports import memcache
from .google_imports import taskqueue
from .google_test_imports import unittest
from .google_test_imports import real_unittest
from . import autobatcher
from . import context
from . import eventloop
from . import model
from . import query
from . import tasklets
from . import test_utils
# Return values for memcache_{set,add,replace,cas}.
STORED = True
NOT_STORED = False
class MyAutoBatcher(autobatcher.AutoBatcher):
_log = []
@classmethod
def reset_log(cls):
cls._log = []
def __init__(self, todo_tasklet, limit):
def wrap(todo, options):
self.__class__._log.append((todo_tasklet.__name__, todo))
return todo_tasklet(todo, options)
super(MyAutoBatcher, self).__init__(wrap, limit)
class ContextTestMixin(object):
the_module = context
@tasklets.tasklet
def create_entities(self, auto_id=False):
key0 = model.Key(flat=['Foo', None])
key1 = model.Key(flat=['Foo', 1])
key2 = model.Key(flat=['Foo', 2])
key3 = model.Key(flat=['Foo', 3])
ent1 = model.Model(key=(key0 if auto_id else key1))
ent2 = model.Model(key=(key0 if auto_id else key2))
ent3 = model.Model(key=(key0 if auto_id else key3))
fut1 = self.ctx.put(ent1)
fut2 = self.ctx.put(ent2)
fut3 = self.ctx.put(ent3)
key1 = yield fut1
key2 = yield fut2
key3 = yield fut3
raise tasklets.Return([key1, key2, key3])
def make_bad_transaction(*arg, **kwargs):
raise NotImplementedError
def testContext_MultiRpc(self):
# This test really tests the proper handling of MultiRpc by
# queue_rpc() in eventloop.py. It's easier to test from here, and
# gives more assurance that it works.
config = datastore_rpc.Configuration(max_get_keys=3, max_put_entities=3)
self.ctx._conn = self.MakeConnection(config=config,
default_model=model.Expando)
@tasklets.tasklet
def foo():
ents = [model.Expando() for _ in range(10)]
futs = [self.ctx.put(ent) for ent in ents]
keys = yield futs
futs = [self.ctx.get(key) for key in keys]
ents2 = yield futs
self.assertEqual(ents2, ents)
raise tasklets.Return(keys)
keys = foo().get_result()
self.assertEqual(len(keys), 10)
def testContext_Cache(self):
@tasklets.tasklet
def foo():
key1 = model.Key(flat=('Foo', 1))
ent1 = model.Expando(key=key1, foo=42, bar='hello')
key = yield self.ctx.put(ent1)
self.assertTrue(key1 in self.ctx._cache) # Whitebox.
a = yield self.ctx.get(key1)
b = yield self.ctx.get(key1)
self.assertTrue(a is b)
yield self.ctx.delete(key1)
self.assertTrue(self.ctx._cache[key] is None) # Whitebox.
a = yield self.ctx.get(key1)
self.assertTrue(a is None)
self.ctx.clear_cache()
self.assertEqual(self.ctx._cache, {}) # Whitebox.
foo().check_success()
def testContext_CacheMisses(self):
# Test that get() caches misses if use_datastore is true but not
# if false. This involves whitebox checks using ctx._cache.
# See issue 106. http://goo.gl/DLiij
ctx = self.ctx
key = model.Key('Foo', 42)
self.assertFalse(key in ctx._cache)
ctx.get(key, use_datastore=False).wait()
self.assertFalse(key in ctx._cache)
ctx.get(key, use_memcache=False).wait()
self.assertTrue(key in ctx._cache)
self.assertEqual(ctx._cache[key], None)
ctx.clear_cache()
ctx.get(key).wait()
self.assertTrue(key in ctx._cache)
self.assertEqual(ctx._cache[key], None)
def testContext_CachePolicy(self):
def should_cache(unused_key):
return False
@tasklets.tasklet
def foo():
key1 = model.Key(flat=('Foo', 1))
ent1 = model.Expando(key=key1, foo=42, bar='hello')
key = yield self.ctx.put(ent1)
self.assertTrue(key1 not in self.ctx._cache) # Whitebox.
a = yield self.ctx.get(key1)
b = yield self.ctx.get(key1)
self.assertTrue(a is not b)
yield self.ctx.delete(key1)
self.assertTrue(key not in self.ctx._cache) # Whitebox.
a = yield self.ctx.get(key1)
self.assertTrue(a is None)
self.ctx.set_cache_policy(should_cache)
self.ctx.set_memcache_policy(False)
foo().check_success()
def testContext_CachePolicyDisabledLater(self):
# If the cache is disabled after an entity is stored in the cache,
# further get() attempts *must not* return the result stored in cache.
self.ctx.set_cache_policy(lambda unused_key: True)
key1 = model.Key(flat=('Foo', 1))
ent1 = model.Expando(key=key1)
self.ctx.put(ent1).get_result()
# get() uses cache
self.assertTrue(key1 in self.ctx._cache) # Whitebox.
self.assertEqual(self.ctx.get(key1).get_result(), ent1)
# get() uses cache
self.ctx._cache[key1] = None # Whitebox.
self.assertEqual(self.ctx.get(key1).get_result(), None)
# get() doesn't use cache
self.ctx.set_cache_policy(lambda unused_key: False)
self.assertEqual(self.ctx.get(key1).get_result(), ent1)
def testContext_CacheQuery(self):
@tasklets.tasklet
def foo():
key1 = model.Key(flat=('Foo', 1))
key2 = model.Key(flat=('Foo', 2))
ent1 = model.Expando(key=key1, foo=42, bar='hello')
ent2 = model.Expando(key=key2, foo=1, bar='world')
key1a, key2a = yield self.ctx.put(ent1), self.ctx.put(ent2)
self.assertTrue(key1 in self.ctx._cache) # Whitebox.
self.assertTrue(key2 in self.ctx._cache) # Whitebox.
self.assertEqual(key1, key1a)
self.assertEqual(key2, key2a)
@tasklets.tasklet
def callback(ent):
return ent
qry = query.Query(kind='Foo')
results = yield self.ctx.map_query(qry, callback)
self.assertEqual(results, [ent1, ent2])
self.assertTrue(results[0] is self.ctx._cache[ent1.key])
self.assertTrue(results[1] is self.ctx._cache[ent2.key])
foo().check_success()
def testContext_MapQuery(self):
@tasklets.tasklet
def callback(ent):
return ent.key.flat()[-1]
@tasklets.tasklet
def foo():
yield self.create_entities()
qry = query.Query(kind='Foo')
res = yield self.ctx.map_query(qry, callback)
raise tasklets.Return(res)
res = foo().get_result()
self.assertEqual(set(res), set([1, 2, 3]))
def testContext_MapQuery_NoCallback(self):
@tasklets.tasklet
def foo():
yield self.create_entities()
qry = query.Query(kind='Foo')
res = yield self.ctx.map_query(qry, None)
raise tasklets.Return(res)
res = foo().get_result()
self.assertEqual(len(res), 3)
for i, ent in enumerate(res):
self.assertTrue(isinstance(ent, model.Model))
self.assertEqual(ent.key.flat(), ('Foo', i + 1))
def testContext_MapQuery_NonTaskletCallback(self):
def callback(ent):
return ent.key.flat()[-1]
@tasklets.tasklet
def foo():
yield self.create_entities()
qry = query.Query(kind='Foo')
res = yield self.ctx.map_query(qry, callback)
raise tasklets.Return(res)
res = foo().get_result()
self.assertEqual(res, [1, 2, 3])
def testContext_MapQuery_CustomFuture(self):
mfut = tasklets.QueueFuture()
@tasklets.tasklet
def callback(ent):
return ent.key.flat()[-1]
@tasklets.tasklet
def foo():
yield self.create_entities()
qry = query.Query(kind='Foo')
res = yield self.ctx.map_query(qry, callback, merge_future=mfut)
self.assertEqual(res, None)
vals = set()
for _ in range(3):
val = yield mfut.getq()
vals.add(val)
fail = mfut.getq()
self.assertRaises(EOFError, fail.get_result)
raise tasklets.Return(vals)
res = foo().get_result()
self.assertEqual(res, set([1, 2, 3]))
def testContext_MapQuery_KeysOnly(self):
qo = query.QueryOptions(keys_only=True)
@tasklets.tasklet
def callback(key):
return key.pairs()[-1]
@tasklets.tasklet
def foo():
yield self.create_entities()
qry = query.Query(kind='Foo')
res = yield self.ctx.map_query(qry, callback, options=qo)
raise tasklets.Return(res)
res = foo().get_result()
self.assertEqual(set(res), set([('Foo', 1), ('Foo', 2), ('Foo', 3)]))
def testContext_MapQuery_Cursors(self):
qo = query.QueryOptions(produce_cursors=True)
@tasklets.tasklet
def callback(ent):
return ent.key.pairs()[-1]
@tasklets.tasklet
def foo():
yield self.create_entities()
qry = query.Query(kind='Foo')
res = yield self.ctx.map_query(qry, callback, options=qo)
raise tasklets.Return(res)
res = foo().get_result()
self.assertEqual(set(res), set([('Foo', 1), ('Foo', 2), ('Foo', 3)]))
def testContext_IterQuery(self):
@tasklets.tasklet
def foo():
yield self.create_entities()
qry = query.Query(kind='Foo')
it = self.ctx.iter_query(qry)
res = []
while True:
try:
ent = yield it.getq()
except EOFError:
break
res.append(ent)
raise tasklets.Return(res)
res = foo().get_result()
self.assertEqual(len(res), 3)
for i, ent in enumerate(res):
self.assertTrue(isinstance(ent, model.Model))
self.assertEqual(ent.key.flat(), ('Foo', i + 1))
def testContext_TransactionFailed(self):
# XXX Why is this called 'Failed'? There's no failure here.
@tasklets.tasklet
def foo():
key = model.Key(flat=('Foo', 1))
ent = model.Expando(key=key, bar=1)
yield self.ctx.put(ent)
@tasklets.tasklet
def callback():
ctx = tasklets.get_context()
self.assertTrue(key not in ctx._cache) # Whitebox.
e = yield key.get_async()
self.assertTrue(key in ctx._cache) # Whitebox.
e.bar = 2
yield e.put_async()
yield self.ctx.transaction(callback)
self.assertEqual(self.ctx._cache[key].bar, 2)
foo().check_success()
def testContext_TransactionException(self):
self.ExpectWarnings()
key = model.Key('Foo', 1)
@tasklets.tasklet
def foo():
ent = model.Expando(key=key, bar=1)
@tasklets.tasklet
def callback():
yield ent.put_async()
raise Exception('foo')
yield self.ctx.transaction(callback)
self.assertRaises(Exception, foo().check_success)
self.assertEqual(key.get(), None)
def testContext_TransactionRollback(self):
self.ExpectWarnings()
key = model.Key('Foo', 1)
@tasklets.tasklet
def foo():
ent = model.Expando(key=key, bar=1)
@tasklets.tasklet
def callback():
yield ent.put_async()
raise model.Rollback()
yield self.ctx.transaction(callback)
foo().check_success()
self.assertEqual(key.get(), None)
def testContext_TransactionRollbackException(self):
self.ExpectWarnings()
key = model.Key('Foo', 1)
class CustomException(Exception):
pass
@tasklets.tasklet
def foo():
ent = model.Expando(key=key, bar=1)
@tasklets.tasklet
def callback():
yield ent.put_async()
ctx = tasklets.get_context()
ctx._conn.transaction # force evaluation
# hack for testing
(ctx._conn
._TransactionalConnection__transaction) = self.make_bad_transaction()
raise CustomException()
yield self.ctx.transaction(callback)
try:
foo().check_success()
self.fail()
except CustomException:
pass # good
self.assertEqual(key.get(), None)
def testContext_TransactionCallBackTasklet(self):
class Foo(model.Model):
n = model.IntegerProperty()
@tasklets.tasklet
def inner_callback():
self.assertTrue(tasklets.get_context().in_transaction())
x = yield Foo.get_or_insert_async('x', n=0)
x.n += 1
yield x.put_async()
raise tasklets.Return(x)
# 1. Regular case.
x = self.ctx.transaction(inner_callback).get_result()
self.assertEqual(x, Foo(n=1, id='x'))
x.key.delete()
# 2. Case for propagation=MANDATORY.
def outer_callback():
ctx = tasklets.get_context()
self.assertTrue(ctx.in_transaction())
f = ctx.transaction(
inner_callback, propagation=context.TransactionOptions.MANDATORY)
x = f.get_result()
self.assertEqual(x, Foo(n=1, id='x'))
return x
x = self.ctx.transaction(outer_callback).get_result()
x.key.delete()
# 3. Case for propagation=ALLOWED.
def outer_callback():
ctx = tasklets.get_context()
self.assertTrue(ctx.in_transaction())
f = ctx.transaction(
inner_callback, propagation=context.TransactionOptions.ALLOWED)
x = f.get_result()
self.assertEqual(x, Foo(n=1, id='x'))
return x
x = self.ctx.transaction(outer_callback).get_result()
x.key.delete()
def testTransaction_OnCommit(self):
self.ExpectWarnings()
class Counter(model.Model):
count = model.IntegerProperty(default=0)
@model.transactional
def trans1(fail=False, bad=None):
tasklets.get_context().call_on_commit(lambda: log.append('A'))
c = key.get()
c.count += 1
c.put()
if bad is not None:
tasklets.get_context().call_on_commit(bad)
tasklets.get_context().call_on_commit(lambda: log.append('B'))
if fail:
raise model.Rollback
# Successful transaction.
key = Counter().put()
log = []
trans1()
self.assertEqual(key.get().count, 1)
self.assertEqual(log, ['A', 'B'])
# Failing transaction.
key = Counter().put()
log = []
trans1(fail=True)
self.assertEqual(key.get().count, 0)
self.assertEqual(log, [])
# Raising callable in transaction.
key = Counter().put()
log = []
self.assertRaises(ZeroDivisionError, trans1, bad=lambda: 1 / 0)
self.assertEqual(key.get().count, 1)
self.assertEqual(log, ['A'])
# Bad callable in transaction.
key = Counter().put()
log = []
self.assertRaises(TypeError, trans1, bad=42)
self.assertEqual(key.get().count, 1)
self.assertEqual(log, ['A'])
# No transaction.
log = []
tasklets.get_context().call_on_commit(lambda: log.append('C'))
self.assertEqual(log, ['C'])
# Raising callable outside transaction.
log = []
self.assertRaises(ZeroDivisionError,
tasklets.get_context().call_on_commit, lambda: 1 / 0)
# Bad callable outside transaction.
log = []
self.assertRaises(TypeError, tasklets.get_context().call_on_commit, 42)
def testDefaultContextTransaction(self):
@tasklets.synctasklet
def outer():
ctx1 = tasklets.get_context()
@tasklets.tasklet
def inner():
ctx2 = tasklets.get_context()
self.assertTrue(ctx1 is not ctx2)
self.assertTrue(isinstance(ctx2._conn,
datastore_rpc.TransactionalConnection))
return 42
a = yield tasklets.get_context().transaction(inner)
ctx1a = tasklets.get_context()
self.assertTrue(ctx1 is ctx1a)
raise tasklets.Return(a)
b = outer()
self.assertEqual(b, 42)
def testExplicitTransactionClearsDefaultContext(self):
old_ctx = tasklets.get_context()
@tasklets.synctasklet
def outer():
ctx1 = tasklets.get_context()
@tasklets.tasklet
def inner():
ctx = tasklets.get_context()
self.assertTrue(ctx is not ctx1)
key = model.Key('Account', 1)
ent = yield key.get_async()
self.assertTrue(tasklets.get_context() is ctx)
self.assertTrue(ent is None)
raise tasklets.Return(42)
fut = ctx1.transaction(inner)
self.assertEqual(tasklets.get_context(), ctx1)
val = yield fut
self.assertEqual(tasklets.get_context(), ctx1)
raise tasklets.Return(val)
val = outer()
self.assertEqual(val, 42)
self.assertTrue(tasklets.get_context() is old_ctx)
def testKindError(self):
self.ExpectWarnings()
ctx = self.MakeContext()
# If the cache is enabled, attempts to retrieve the object we just put will
# be satisfied from the cache, so the adapter we're testing will never get
# called.
ctx.set_cache_policy(lambda unused_key: False)
@tasklets.tasklet
def foo():
# Foo class is declared in query_test, so let's get a unusual class name.
key1 = model.Key(flat=('ThisModelClassDoesntExist', 1))
ent1 = model.Expando(key=key1, foo=42, bar='hello')
yield ctx.put(ent1)
yield ctx.get(key1)
self.assertRaises(model.KindError, foo().check_success)
def testAsyncInTransaction(self):
# See issue 81. http://goo.gl/F097l
class Bar(model.Model):
name = model.StringProperty()
bar = Bar(id='bar', name='bar')
bar.put()
@tasklets.tasklet
def trans():
bar = Bar.get_by_id('bar')
bar.name = 'updated-bar'
bar.put_async() # PROBLEM IS HERE, with yield it properly works
model.transaction_async(trans).get_result()
bar = bar.key.get()
self.assertEqual(bar.name, 'updated-bar')
def start_test_server(self):
host = 'localhost'
s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
for i in range(10):
port = random.randrange(32768, 60000)
try:
s.bind((host, port))
break
except socket.error:
continue
else:
self.fail('Could not find an unused port in 10 tries')
s.listen(1)
def run():
c, addr = s.accept()
s.close()
c.recv(1000) # Throw away request.
c.send('HTTP/1.0 200 Ok\r\n\r\n') # Emptiest response.
c.close()
t = threading.Thread(target=run)
t.setDaemon(True)
t.start()
return host, port
def testUrlFetch(self):
self.testbed.init_urlfetch_stub()
host, port = self.start_test_server()
fut = self.ctx.urlfetch('http://%s:%d' % (host, port))
result = fut.get_result()
self.assertEqual(result.status_code, 200)
self.assertTrue(isinstance(result.content, str))
def testDatastoreConnectionIsRestored(self):
# See issue 209. http://goo.gl/7TEyM
class TestData(model.Model):
pass
@tasklets.tasklet
def txn():
conn1 = datastore._GetConnection()
self.assertTrue(
isinstance(conn1, datastore_rpc.TransactionalConnection), conn1)
yield TestData().put_async()
conn2 = datastore._GetConnection()
self.assertEqual(conn1, conn2)
@tasklets.synctasklet
def many_txns():
# Exactly how many transactions are needed to make this fail
# appears to be random. With 100 it always seems to fail
# (unless the bug is fixed).
conn_a = datastore._GetConnection()
ts = [model.transaction_async(txn) for i in range(100)]
conn_b = datastore._GetConnection()
self.assertEqual(conn_a, conn_b)
yield ts
conn_c = datastore._GetConnection()
self.assertEqual(conn_b, conn_c)
conn_before = datastore._GetConnection()
many_txns()
conn_after = datastore._GetConnection()
self.assertEqual(conn_before, conn_after)
class ContextMemcacheTestMixin(object):
def testContext_CacheMemcache(self):
# Test that when get() finds the value in memcache, it updates
# _cache.
class Foo(model.Model):
pass
ctx = self.ctx
ctx.set_cache_policy(False)
ctx.set_memcache_policy(False)
ent = Foo()
key = ent.put()
mkey = ctx._memcache_prefix + key.urlsafe()
self.assertFalse(key in ctx._cache)
self.assertEqual(None, memcache.get(mkey))
ctx.set_memcache_policy(True)
key.get()
self.assertFalse(key in ctx._cache)
self.assertNotEqual(None, memcache.get(mkey))
eventloop.run()
ctx.set_cache_policy(True)
key.get() # Satisfied from memcache
self.assertTrue(key in ctx._cache)
def testContext_MemcacheMissingKind(self):
ctx = self.MakeContext(default_model=None, auto_batcher_class=MyAutoBatcher)
ctx.set_memcache_policy(False)
ctx.set_cache_policy(False)
class Foo(model.Model):
foo = model.IntegerProperty()
bar = model.StringProperty()
key1 = model.Key(flat=('Foo', 1))
ent1 = Foo(key=key1, foo=42, bar='hello')
ctx.put(ent1).get_result()
ctx.set_memcache_policy(True)
ctx.get(key1).get_result() # Pull entity into memcache
model.Model._reset_kind_map()
self.assertRaises(model.KindError, ctx.get(key1).get_result)
ctx = self.MakeContext(default_model=Foo, auto_batcher_class=MyAutoBatcher)
ctx.set_memcache_policy(True)
ctx.set_cache_policy(False)
ent1_res = ctx.get(key1).get_result()
self.assertEqual(ent1, ent1_res)
def testContext_MemcachePolicy(self):
badkeys = []
def tracking_add_async(*args, **kwds):
try:
res = save_add_async(*args, **kwds)
if badkeys and not res:
res = badkeys
track.append((args, kwds, res, None))
return res
except Exception, err:
track.append((args, kwds, None, err))
raise
@tasklets.tasklet
def foo():
k1, k2 = yield self.ctx.put(ent1), self.ctx.put(ent2)
self.assertEqual(k1, key1)
self.assertEqual(k2, key2)
# Write to memcache.
yield (self.ctx.get(k1, use_cache=False),
self.ctx.get(k2, use_cache=False))
eventloop.run() # Let other tasklet complete.
key1 = model.Key('Foo', 1)
key2 = model.Key('Foo', 2)
ent1 = model.Expando(key=key1, foo=42, bar='hello')
ent2 = model.Expando(key=key2, foo=1, bar='world')
save_add_multi_async = self.ctx.memcache_client._memcache.add_multi_async
try:
self.ctx.memcache_client._memcache.add_multi_async = tracking_add_multi_async
yield self.ctx.memcache_client._memcache.flush_all_async()
track = []
foo().check_success()
self.assertEqual(len(track), 1)
self.assertEqual(track[0][0],
({key1.urlsafe(): ent1._to_pb(),
key2.urlsafe(): ent2._to_pb()},))
self.assertEqual(track[0][1], {'key_prefix': self.ctx._memcache_prefix,
'time': 0})
yield self.ctx.memcache_client._memcache.flush_all_async()
track = []
self.ctx.set_memcache_policy(lambda unused_key: False)
foo().check_success()
self.assertEqual(len(track), 0)
yield self.ctx.memcache_client._memcache.flush_all_async()
track = []
self.ctx.set_memcache_policy(lambda key: key == key1)
foo().check_success()
self.assertEqual(len(track), 1)
self.assertEqual(track[0][0],
({key1.urlsafe(): ent1._to_pb()},))
self.assertEqual(track[0][1], {'key_prefix': self.ctx._memcache_prefix,
'time': 0})
yield self.ctx.memcache_client._memcache.flush_all_async()
track = []
self.ctx.set_memcache_policy(lambda unused_key: True)
self.ctx.set_memcache_timeout_policy(lambda key: key.id())
foo().check_success()
self.assertEqual(len(track), 2)
self.assertEqual(track[0][0],
({key1.urlsafe(): ent1._to_pb()},))
self.assertEqual(track[0][1], {'key_prefix': self.ctx._memcache_prefix,
'time': 1})
self.assertEqual(track[1][0],
({key2.urlsafe(): ent2._to_pb()},))
self.assertEqual(track[1][1], {'key_prefix': self.ctx._memcache_prefix,
'time': 2})
yield self.ctx.memcache_client._memcache.flush_all_async()
track = []
badkeys = [key2.urlsafe()]
self.ctx.set_memcache_timeout_policy(lambda unused_key: 0)
foo().check_success()
self.assertEqual(len(track), 1)
self.assertEqual(track[0][2], badkeys)
yield self.ctx.memcache_client._memcache.flush_all_async()
finally:
self.ctx.memcache_client._memcache.add_multi_async = save_add_multi_async
def testContext_Memcache(self):
@tasklets.tasklet
def foo():
key1 = model.Key(flat=('Foo', 1))
key2 = model.Key(flat=('Foo', 2))
ent1 = model.Expando(key=key1, foo=42, bar='hello')
ent2 = model.Expando(key=key2, foo=1, bar='world')
self.ctx.set_memcache_policy(False) # Disable writing _LOCKED
k1, k2 = yield self.ctx.put(ent1), self.ctx.put(ent2)
self.ctx.set_memcache_policy(True)
self.assertEqual(k1, key1)
self.assertEqual(k2, key2)
# Write to memcache.
yield (self.ctx.get(k1, use_cache=False),
self.ctx.get(k2, use_cache=False))
eventloop.run() # Let other tasklet complete.
keys = [k1.urlsafe(), k2.urlsafe()]
results = memcache.get_multi(keys, key_prefix=self.ctx._memcache_prefix)
self.assertEqual(
results,
{key1.urlsafe():
ent1._to_pb(set_key=False).SerializePartialToString(),
key2.urlsafe():
ent2._to_pb(set_key=False).SerializePartialToString(),
})
foo().check_success()
def testContext_TransactionMemcache(self):
class Foo(model.Model):
name = model.StringProperty()
foo1 = Foo(name='foo1')
foo2 = Foo(name='foo2')
key1 = foo1.put()
key2 = foo2.put()
skey1 = self.ctx._memcache_prefix + key1.urlsafe()
skey2 = self.ctx._memcache_prefix + key2.urlsafe()
# Be sure nothing is in memcache.
self.assertEqual(memcache.get(skey1), None)
self.assertEqual(memcache.get(skey2), None)
# Be sure nothing is in the context cache.
self.ctx.clear_cache()
# Run some code in a transaction.
def txn():
ctx = tasklets.get_context()
self.assertTrue(ctx is not self.ctx)
f1 = key1.get()
f2 = key1.get()
f1.name += 'a'
f1.put()
# Don't put f2.
# Verify the state of memcache.
self.assertEqual(memcache.get(skey1), context._LOCKED)
self.assertEqual(memcache.get(skey2), None)
self.ctx.transaction(txn).wait()
# Verify memcache is cleared.
self.assertEqual(memcache.get(skey1), None)
self.assertEqual(memcache.get(skey2), None)
# Clear the context cache.
self.ctx.clear_cache()
# Non-transactional get() updates memcache.
f1 = key1.get()
f2 = key2.get()
eventloop.run() # Wait for memcache.set() RPCs
self.assertNotEqual(memcache.get(skey1), None)
self.assertNotEqual(memcache.get(skey2), None)
def testMemcachePolicy(self):
# Bug reported by Jack Hebert.
class P(model.Model):
pass
class Q(model.Model):
pass
def policy(key): return key.kind() != 'P'
self.ctx.set_cache_policy(policy)
self.ctx.set_memcache_policy(policy)
k1 = model.Key(P, 1)
k2 = model.Key(Q, 1)
f1 = self.ctx.get(k1)
f2 = self.ctx.get(k2)
self.assertTrue(f1.get_result() is None)
self.assertTrue(f2.get_result() is None)
def testMemcacheDeleteThenGet(self):
# Test that memcache is written synchronously when datastore policy is off.
self.ctx.set_cache_policy(False)
self.ctx.set_datastore_policy(False)
self.ctx.set_memcache_policy(True)
class EmptyModel(model.Model):
pass
key = model.Key(EmptyModel, 1)
# Delete the key (just to be sure).
del_fut = self.ctx.delete(key)
del_fut.get_result()
# Create and store a new model instance using the key we just deleted.
# Because datastore policy is off, this attempts to write it to memcache.
EmptyModel(key=key).put()
# Verify that it is now in memcache.
get_fut = self.ctx.get(key)
ent = get_fut.get_result()
self.assertTrue(ent is not None,
'Memcache delete did block memcache set %r' % ent)
def testMemcacheAPI(self):
self.ExpectErrors()
@tasklets.tasklet
def foo():
ctx = tasklets.get_context()
k1 = 'k1'
k2 = u'k2'
vv = yield ctx.memcache_get(k1), ctx.memcache_get(k2)
self.assertEqual(vv, [None, None])
v1 = '24'
v2 = 42
vv = yield ctx.memcache_set(k1, v1), ctx.memcache_set(k2, v2)
self.assertEqual(vv, [STORED, STORED])
vv = yield ctx.memcache_get(k1), ctx.memcache_get(k2)
self.assertEqual(vv, [v1, v2])
vv = yield ctx.memcache_incr(k1), ctx.memcache_decr(k2)
self.assertEqual(vv, [25, 41])
vv = yield ctx.memcache_get(k1), ctx.memcache_get(k2)
self.assertEqual(vv, ['25', 41])
vv = yield ctx.memcache_incr(k1, -1), ctx.memcache_decr(k2, -1)
self.assertEqual(vv, [24, 42])
vv = yield ctx.memcache_get(k1), ctx.memcache_get(k2)
self.assertEqual(vv, [v1, v2])
vv = yield ctx.memcache_add(k1, 'a'), ctx.memcache_add(k2, 'b')
self.assertEqual(vv, [NOT_STORED, NOT_STORED])
vv = yield ctx.memcache_replace(k1, 'a'), ctx.memcache_replace(k2, 'b')
self.assertEqual(vv, [STORED, STORED])
vv = yield ctx.memcache_delete(k1), ctx.memcache_delete(k2)
self.assertEqual(vv, [memcache.DELETE_SUCCESSFUL,
memcache.DELETE_SUCCESSFUL])
vv = yield ctx.memcache_delete(k1), ctx.memcache_delete(k2)
self.assertEqual(vv, [memcache.DELETE_ITEM_MISSING,
memcache.DELETE_ITEM_MISSING])
vv = yield ctx.memcache_incr(k1), ctx.memcache_decr(k2)
self.assertEqual(vv, [None, None])
vv = yield ctx.memcache_replace(k1, 'a'), ctx.memcache_replace(k2, 'b')
self.assertEqual(vv, [NOT_STORED, NOT_STORED])
vv = yield ctx.memcache_add(k1, 'a'), ctx.memcache_add(k2, 'b')
self.assertEqual(vv, [STORED, STORED])
logging.warn('Following two errors are expected:')
vv = yield ctx.memcache_incr(k1), ctx.memcache_decr(k2)
self.assertEqual(vv, [None, None])
foo().get_result()
def testMemcacheCAS(self):
@tasklets.tasklet
def foo():
c1 = self.MakeContext()
c2 = self.MakeContext()
k1 = u'k1'
k2 = 'k2'
yield c1.memcache_set(k1, 'a'), c1.memcache_set(k2, 'b')
vv = yield c2.memcache_get(k1), c2.memcache_get(k2)
self.assertEqual(vv, ['a', 'b'])
vv = yield c1.memcache_gets(k1), c1.memcache_get(k2, for_cas=True)
self.assertEqual(vv, ['a', 'b'])
ffff = [c1.memcache_cas(k1, 'x'), c1.memcache_cas(k2, 'y'),
c2.memcache_cas(k1, 'p'), c2.memcache_cas(k2, 'q')]
vvvv = yield ffff
self.assertEqual(vvvv, [STORED, STORED, NOT_STORED, NOT_STORED])
foo().get_result()
def testMemcacheErrors(self):
# See issue 94. http://goo.gl/E7OBH
# Install an error handler.
save_create_rpc = memcache.create_rpc
def fake_check_success(*args):
raise apiproxy_errors.Error('fake error')
def fake_create_rpc(*args, **kwds):
rpc = save_create_rpc(*args, **kwds)
rpc.check_success = fake_check_success
return rpc
try:
memcache.create_rpc = fake_create_rpc
val = self.ctx.memcache_get('key2').get_result()
self.assertEqual(val, None)
val = self.ctx.memcache_incr('key2').get_result()
self.assertEqual(val, None)
ok = self.ctx.memcache_set('key2', 'value2').get_result()
self.assertFalse(ok)
ok = self.ctx.memcache_delete('key2').get_result()
self.assertEqual(ok, memcache.DELETE_NETWORK_FAILURE)
finally:
memcache.create_rpc = save_create_rpc
def testMemcacheNamespaces(self):
@tasklets.tasklet
def foo():
k1 = 'k1'
k2 = 'k2'
ns = u'ns'
# Write two values in the namespace
s1, s2 = yield (self.ctx.memcache_set(k1, 42, namespace=ns),
self.ctx.memcache_add(k2, 100, namespace=ns))
self.assertEqual(s1, STORED)
self.assertEqual(s2, STORED)
# Check that they aren't in the default namespace
v1n, v2n = yield (self.ctx.memcache_get(k1),
self.ctx.memcache_get(k2))
self.assertEqual(v1n, None)
self.assertEqual(v2n, None)
# Read them back using get and gets
v1, v2 = yield (self.ctx.memcache_get(k1, namespace=ns),
self.ctx.memcache_gets(k2, namespace=ns))