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# -*- coding: utf-8 -*-
# test_couch_operations_atomicity.py
# Copyright (C) 2013, 2014 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Test atomicity of couch operations.
"""
import os
import tempfile
import threading
from urlparse import urljoin
from twisted.internet import defer
from leap.soledad.client import Soledad
from leap.soledad.common.couch import CouchDatabase, CouchServerState
from leap.soledad.common.tests.util import (
make_token_soledad_app,
make_soledad_document_for_test,
token_soledad_sync_target,
)
from leap.soledad.common.tests.test_couch import CouchDBTestCase
from leap.soledad.common.tests.u1db_tests import TestCaseWithServer
from leap.soledad.common.tests.test_server import _couch_ensure_database
REPEAT_TIMES = 20
# monkey path CouchServerState so it can ensure databases.
CouchServerState.ensure_database = _couch_ensure_database
class CouchAtomicityTestCase(CouchDBTestCase, TestCaseWithServer):
@staticmethod
def make_app_after_state(state):
return make_token_soledad_app(state)
make_document_for_test = make_soledad_document_for_test
sync_target = token_soledad_sync_target
def _soledad_instance(self, user='user-uuid', passphrase=u'123',
prefix='',
secrets_path='secrets.json',
local_db_path='soledad.u1db', server_url='',
cert_file=None, auth_token=None):
"""
Instantiate Soledad.
"""
# this callback ensures we save a document which is sent to the shared
# db.
def _put_doc_side_effect(doc):
self._doc_put = doc
soledad = Soledad(
user,
passphrase,
secrets_path=os.path.join(self.tempdir, prefix, secrets_path),
local_db_path=os.path.join(
self.tempdir, prefix, local_db_path),
server_url=server_url,
cert_file=cert_file,
auth_token=auth_token,
shared_db=self.get_default_shared_mock(_put_doc_side_effect))
self.addCleanup(soledad.close)
return soledad
def make_app(self):
self.request_state = CouchServerState(self._couch_url)
return self.make_app_after_state(self.request_state)
def setUp(self):
TestCaseWithServer.setUp(self)
CouchDBTestCase.setUp(self)
self._couch_url = 'http://localhost:' + str(self.wrapper.port)
self.db = CouchDatabase.open_database(
urljoin(self._couch_url, 'user-user-uuid'),
create=True,
replica_uid='replica',
ensure_ddocs=True)
self.tempdir = tempfile.mkdtemp(prefix="leap_tests-")
def tearDown(self):
self.db.delete_database()
self.db.close()
CouchDBTestCase.tearDown(self)
TestCaseWithServer.tearDown(self)
#
# Sequential tests
#
def test_correct_transaction_log_after_sequential_puts(self):
"""
Assert that the transaction_log increases accordingly with sequential
puts.
"""
doc = self.db.create_doc({'ops': 0})
docs = [doc.doc_id]
for i in range(0, REPEAT_TIMES):
self.assertEqual(
i + 1, len(self.db._get_transaction_log()))
doc.content['ops'] += 1
self.db.put_doc(doc)
docs.append(doc.doc_id)
# assert length of transaction_log
transaction_log = self.db._get_transaction_log()
self.assertEqual(
REPEAT_TIMES + 1, len(transaction_log))
# assert that all entries in the log belong to the same doc
self.assertEqual(REPEAT_TIMES + 1, len(docs))
for doc_id in docs:
self.assertEqual(
REPEAT_TIMES + 1,
len(filter(lambda t: t[0] == doc_id, transaction_log)))
def test_correct_transaction_log_after_sequential_deletes(self):
"""
Assert that the transaction_log increases accordingly with sequential
puts and deletes.
"""
docs = []
for i in range(0, REPEAT_TIMES):
doc = self.db.create_doc({'ops': 0})
self.assertEqual(
2 * i + 1, len(self.db._get_transaction_log()))
docs.append(doc.doc_id)
self.db.delete_doc(doc)
self.assertEqual(
2 * i + 2, len(self.db._get_transaction_log()))
# assert length of transaction_log
transaction_log = self.db._get_transaction_log()
self.assertEqual(
2 * REPEAT_TIMES, len(transaction_log))
# assert that each doc appears twice in the transaction_log
self.assertEqual(REPEAT_TIMES, len(docs))
for doc_id in docs:
self.assertEqual(
2,
len(filter(lambda t: t[0] == doc_id, transaction_log)))
def test_correct_sync_log_after_sequential_syncs(self):
"""
Assert that the sync_log increases accordingly with sequential syncs.
"""
self.startServer()
sol = self._soledad_instance(
auth_token='auth-token',
server_url=self.getURL())
def _create_docs(results):
deferreds = []
for i in xrange(0, REPEAT_TIMES):
deferreds.append(sol.create_doc({}))
return defer.DeferredList(deferreds)
def _assert_transaction_and_sync_logs(results, sync_idx):
# assert sizes of transaction and sync logs
self.assertEqual(
sync_idx * REPEAT_TIMES,
len(self.db._get_transaction_log()))
self.assertEqual(
1 if sync_idx > 0 else 0,
len(self.db._database.view('syncs/log').rows))
def _assert_sync(results, sync_idx):
gen, docs = results
self.assertEqual((sync_idx + 1) * REPEAT_TIMES, gen)
self.assertEqual((sync_idx + 1) * REPEAT_TIMES, len(docs))
# assert sizes of transaction and sync logs
self.assertEqual((sync_idx + 1) * REPEAT_TIMES,
len(self.db._get_transaction_log()))
sync_log_rows = self.db._database.view('syncs/log').rows
sync_log = sync_log_rows[0].value
replica_uid = sync_log_rows[0].key
known_gen = sync_log['known_generation']
known_trans_id = sync_log['known_transaction_id']
# assert sync_log has exactly 1 row
self.assertEqual(1, len(sync_log_rows))
# assert it has the correct replica_uid, gen and trans_id
self.assertEqual(sol._dbpool.replica_uid, replica_uid)
conn_key = sol._dbpool._u1dbconnections.keys().pop()
conn = sol._dbpool._u1dbconnections[conn_key]
sol_gen, sol_trans_id = conn._get_generation_info()
self.assertEqual(sol_gen, known_gen)
self.assertEqual(sol_trans_id, known_trans_id)
# create some documents
d = _create_docs(None)
# sync first time and assert success
d.addCallback(_assert_transaction_and_sync_logs, 0)
d.addCallback(lambda _: sol.sync())
d.addCallback(lambda _: sol.get_all_docs())
d.addCallback(_assert_sync, 0)
# create more docs, sync second time and assert success
d.addCallback(_create_docs)
d.addCallback(_assert_transaction_and_sync_logs, 1)
d.addCallback(lambda _: sol.sync())
d.addCallback(lambda _: sol.get_all_docs())
d.addCallback(_assert_sync, 1)
d.addCallback(lambda _: sol.close())
return d
#
# Concurrency tests
#
class _WorkerThread(threading.Thread):
def __init__(self, params, run_method):
threading.Thread.__init__(self)
self._params = params
self._run_method = run_method
def run(self):
self._run_method(self)
def test_correct_transaction_log_after_concurrent_puts(self):
"""
Assert that the transaction_log increases accordingly with concurrent
puts.
"""
pool = threading.BoundedSemaphore(value=1)
threads = []
docs = []
def _run_method(self):
doc = self._params['db'].create_doc({})
pool.acquire()
self._params['docs'].append(doc.doc_id)
pool.release()
for i in range(0, REPEAT_TIMES):
thread = self._WorkerThread(
{'docs': docs, 'db': self.db},
_run_method)
thread.start()
threads.append(thread)
for thread in threads:
thread.join()
# assert length of transaction_log
transaction_log = self.db._get_transaction_log()
self.assertEqual(
REPEAT_TIMES, len(transaction_log))
# assert all documents are in the log
self.assertEqual(REPEAT_TIMES, len(docs))
for doc_id in docs:
self.assertEqual(
1,
len(filter(lambda t: t[0] == doc_id, transaction_log)))
def test_correct_transaction_log_after_concurrent_deletes(self):
"""
Assert that the transaction_log increases accordingly with concurrent
puts and deletes.
"""
threads = []
docs = []
pool = threading.BoundedSemaphore(value=1)
# create/delete method that will be run concurrently
def _run_method(self):
doc = self._params['db'].create_doc({})
pool.acquire()
docs.append(doc.doc_id)
pool.release()
self._params['db'].delete_doc(doc)
# launch concurrent threads
for i in range(0, REPEAT_TIMES):
thread = self._WorkerThread({'db': self.db}, _run_method)
thread.start()
threads.append(thread)
# wait for threads to finish
for thread in threads:
thread.join()
# assert transaction log
transaction_log = self.db._get_transaction_log()
self.assertEqual(
2 * REPEAT_TIMES, len(transaction_log))
# assert that each doc appears twice in the transaction_log
self.assertEqual(REPEAT_TIMES, len(docs))
for doc_id in docs:
self.assertEqual(
2,
len(filter(lambda t: t[0] == doc_id, transaction_log)))
def test_correct_sync_log_after_concurrent_puts_and_sync(self):
"""
Assert that the sync_log is correct after concurrent syncs.
"""
docs = []
self.startServer()
sol = self._soledad_instance(
auth_token='auth-token',
server_url=self.getURL())
def _save_doc_ids(results):
for doc in results:
docs.append(doc.doc_id)
# create documents in parallel
deferreds = []
for i in range(0, REPEAT_TIMES):
d = sol.create_doc({})
deferreds.append(d)
# wait for documents creation and sync
d = defer.gatherResults(deferreds)
d.addCallback(_save_doc_ids)
d.addCallback(lambda _: sol.sync())
def _assert_logs(results):
transaction_log = self.db._get_transaction_log()
self.assertEqual(REPEAT_TIMES, len(transaction_log))
# assert all documents are in the remote log
self.assertEqual(REPEAT_TIMES, len(docs))
for doc_id in docs:
self.assertEqual(
1,
len(filter(lambda t: t[0] == doc_id, transaction_log)))
d.addCallback(_assert_logs)
d.addCallback(lambda _: sol.close())
return d
def test_concurrent_syncs_do_not_fail(self):
"""
Assert that concurrent attempts to sync end up being executed
sequentially and do not fail.
"""
docs = []
self.startServer()
sol = self._soledad_instance(
auth_token='auth-token',
server_url=self.getURL())
deferreds = []
for i in xrange(0, REPEAT_TIMES):
d = sol.create_doc({})
d.addCallback(lambda doc: docs.append(doc.doc_id))
d.addCallback(lambda _: sol.sync())
deferreds.append(d)
def _assert_logs(results):
transaction_log = self.db._get_transaction_log()
self.assertEqual(REPEAT_TIMES, len(transaction_log))
# assert all documents are in the remote log
self.assertEqual(REPEAT_TIMES, len(docs))
for doc_id in docs:
self.assertEqual(
1,
len(filter(lambda t: t[0] == doc_id, transaction_log)))
d = defer.gatherResults(deferreds)
d.addCallback(_assert_logs)
d.addCallback(lambda _: sol.close())
return d
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