chaintool/chainsyncer
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WIP Move unlock filter code into store base

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This commit is contained in:
lash 2022-04-30 07:35:08 +00:00
parent 44bdda80bf
commit 6b6b26f1ae
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
8 changed files with 178 additions and 19 deletions
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9
chainsyncer/error.py
View File

@ -31,16 +31,25 @@ class LockError(Exception):
class FilterDone(Exception):
"""Exception raised when all registered filters have been executed
"""
pass
class InterruptError(FilterDone):
"""Exception for interrupting or attempting to use an interrupted sync
"""
pass
class IncompleteFilterError(Exception):
"""Exception raised if filter reset is executed prematurely
"""
pass
class FilterInitializationError(BackendError):
"""Exception raised if filter state does not match the registered filters
"""
pass
#class AbortTx(Exception):
# """

2
chainsyncer/runnable/unlock.py
View File

@ -106,6 +106,8 @@ def main():
store.connect()
store.start(ignore_lock=True)
store.unlock_filter(not action_is_forward)
return
lock_state = store.filter_state.from_name('LOCK')
locked_item = store.filter_state.list(lock_state)

9
chainsyncer/session.py
View File

@ -13,12 +13,15 @@ class SyncSession:
def __init__(self, session_store):
self.session_store = session_store
self.started = self.session_store.started
self.get = self.session_store.get
self.next = self.session_store.next_item
self.item = None
self.filters = self.session_store.filters
def get(self, k):
return self.session_store.get(str(k))
def start(self, offset=0, target=-1):
self.session_store.start(offset=offset, target=target)
self.item = self.session_store.next_item()
@ -38,5 +41,5 @@ class SyncSession:
if not self.item.release(interrupt=interrupt):
break
self.item.reset()
self.next()
#self.next()
self.session_store.disconnect()

83
chainsyncer/store/base.py
View File

@ -13,6 +13,7 @@ from chainsyncer.error import (
InterruptError,
IncompleteFilterError,
SyncDone,
FilterInitializationError,
)
logg = logging.getLogger(__name__)
@ -67,13 +68,16 @@ class SyncItem:
def resume(self):
return
filter_state = self.filter_state.state(self.state_key)
if filter_state > 0x0f:
filter_state_part = self.filter_state.mask(filter_state, 0x0f)
if len(self.filter_state.elements(filter_state)) == 1:
logg.info('resume execution on state {} ({})'.format(self.filter_state.name(filter_state_part), filter_state_part))
lock_state = self.filter_state.from_name('LOCK')
self.filter_state.set(lock_state)
if filter_state_part > 0:
filter_state_part_name = self.filter_state.name(filter_state_part)
if filter_state_part_name[0] != '_':
logg.info('resume execution on state {} ({})'.format(self.filter_state.name(filter_state_part), filter_state_part))
lock_state = self.filter_state.from_name('LOCK')
self.filter_state.set(self.state_key, lock_state)
def reset(self, check_incomplete=True):
@ -222,8 +226,9 @@ class SyncStore:
self.filter_state.put(block_number_str)
o = SyncItem(offset, target, self.state, self.filter_state, ignore_lock=ignore_lock)
o.resume()
self.items[offset] = o
self.item_keys.append(offset)
k = str(offset)
self.items[k] = o
self.item_keys.append(k)
elif offset > 0:
logg.warning('block number argument {} for start ignored for already initiated sync {}'.format(offset, self.session_id))
self.started = True
@ -272,8 +277,9 @@ class SyncStore:
item_target = thresholds[i+1]
o = SyncItem(block_number, item_target, self.state, self.filter_state, started=True, ignore_lock=ignore_lock)
o.resume()
self.items[block_number] = o
self.item_keys.append(block_number)
k = str(block_number)
self.items[k] = o
self.item_keys.append(k)
logg.info('added existing {}'.format(o))
self.get_target()
@ -315,8 +321,65 @@ class SyncStore:
raise NotImplementedError()
def peek_next_filter(self):
pass
def __get_locked_item(self):
locked_item = self.filter_state.list(self.filter_state.state_store.LOCK)
if len(locked_item) == 0:
logg.error('Sync filter in store {} is not locked\n'.format(self))
return None
elif len(locked_item) > 1:
raise FilterInitializationError('More than one locked filter item encountered in store {}. That should never happen, so I do not know what to do next.\n'.format(self))
return locked_item[0]
def __get_filter_index(self, k):
i = -1
fltrs = self.load_filter_list()
for fltr in fltrs:
i += 1
if k == fltr.upper():
logg.debug('lock filter match at filter list index {}'.format(i))
return (i, fltrs,)
def unlock_filter(self, revert=False):
locked_item_key = self.__get_locked_item()
if locked_item_key == None:
return False
locked_item = self.get(locked_item_key)
locked_state = self.filter_state.state(locked_item_key) - self.filter_state.state_store.LOCK
locked_state_name = self.filter_state.name(locked_state)
logg.debug('found locked item {} in state {}'.format(locked_item, locked_state))
(i, fltrs) = self.__get_filter_index(locked_state_name)
if i == -1:
raise FilterInitializationError('locked state {} ({}) found for item {}, but matching filter has not been registered'.format(locked_state_name, locked_state, locked_item))
if revert:
self.__unlock_previous(locked_item, fltrs, i)
else:
self.__unlock_next(locked_item, fltrs, i)
return True
def __unlock_next(self, item, lst, index):
#self.filter_state.state_store.unset(item.state_key, self.filter_state.state_store.LOCK)
if index == len(lst) - 1:
item.reset(check_incomplete=False)
else:
item.release()
def __unlock_previous(self, item, lst, index):
if index == 0:
item.reset(check_incomplete=False)
else:
new_state = lst(index)
self.filter_state.state_store.from_name(new_state.upper())
def peek_current_filter(self):
pass

3
chainsyncer/unittest/base.py
View File

@ -13,7 +13,8 @@ from chainsyncer.error import NoBlockForYou
from chainsyncer.driver import SyncDriver
logging.STATETRACE = 5
logg = logging.getLogger().getChild(__name__)
logging.addLevelName('STATETRACE', logging.STATETRACE)
logg = logging.getLogger(__name__)
def state_event_handler(k, v_old, v_new):

4
chainsyncer/unittest/store.py
View File

@ -232,7 +232,7 @@ class TestStoreBase(unittest.TestCase):
if self.persist:
store = self.store_factory('foo')
store.start()
o = store.get(2)
o = store.get('2')
def t_sync_history_interrupted(self):
@ -252,7 +252,7 @@ class TestStoreBase(unittest.TestCase):
store.stop(bogus_item)
store = self.store_factory('foo')
store.start()
o = store.get(0)
o = store.get('0')
self.assertEqual(o.cursor, 2)
self.assertEqual(o.target, 13)
o.next(advance_block=True)

2
setup.cfg
View File

@ -1,6 +1,6 @@
[metadata]
name = chainsyncer
version = 0.4.2
version = 0.4.3
description = Generic blockchain syncer driver
author = Louis Holbrook
author_email = dev@holbrook.no

85
tests/test_filter.py
View File

@ -19,17 +19,22 @@ from chainsyncer.unittest import (
MockConn,
MockTx,
MockBlock,
MockFilterError,
state_event_handler,
filter_state_event_handler,
)
logging.basicConfig(level=logging.DEBUG)
logging.basicConfig(level=logging.STATETRACE)
logg = logging.getLogger()
class TestFilter(unittest.TestCase):
def setUp(self):
self.path = tempfile.mkdtemp()
self.store = SyncFsStore(self.path)
self.store = SyncFsStore(self.path, state_event_callback=state_event_handler, filter_state_event_callback=filter_state_event_handler)
self.session = SyncSession(self.store)
self.conn = MockConn()
@ -73,6 +78,82 @@ class TestFilter(unittest.TestCase):
self.assertEqual(len(fltr_two.contents), 0)
def test_filter_resume_single_revert(self):
fltr_one = MockFilter('foo', brk_hard=True)
self.store.register(fltr_one)
self.session.start()
item = self.store.get('0')
item.next()
tx_hash = os.urandom(32).hex()
tx = MockTx(42, tx_hash)
block = MockBlock(13, [tx_hash])
with self.assertRaises(MockFilterError):
self.session.filter(self.conn, block, tx)
# Unlock the state, reverting to previous filter
store = SyncFsStore(self.path, state_event_callback=state_event_handler, filter_state_event_callback=filter_state_event_handler)
self.conn = MockConn()
fltr_one = MockFilter('foo')
store.register(fltr_one)
store.connect()
store.start(ignore_lock=True)
store.unlock_filter(revert=True)
store = SyncFsStore(self.path, state_event_callback=state_event_handler, filter_state_event_callback=filter_state_event_handler)
session = SyncSession(store)
self.conn = MockConn()
fltr_one = MockFilter('foo')
store.register(fltr_one)
session.start()
session.filter(self.conn, block, tx)
def test_filter_resume_single_continue(self):
fltr_one = MockFilter('foo', brk_hard=True)
self.store.register(fltr_one)
self.session.start()
item = self.store.get('0')
item.next()
tx_hash = os.urandom(32).hex()
tx = MockTx(42, tx_hash)
block = MockBlock(13, [tx_hash])
with self.assertRaises(MockFilterError):
self.session.filter(self.conn, block, tx)
# Unlock the state, reverting to previous filter
store = SyncFsStore(self.path, state_event_callback=state_event_handler, filter_state_event_callback=filter_state_event_handler)
self.conn = MockConn()
fltr_one = MockFilter('foo')
store.register(fltr_one)
store.connect()
store.start(ignore_lock=True)
store.unlock_filter(revert=False)
store = SyncFsStore(self.path, state_event_callback=state_event_handler, filter_state_event_callback=filter_state_event_handler)
session = SyncSession(store)
self.conn = MockConn()
fltr_one = MockFilter('foo')
store.register(fltr_one)
store.connect()
session.start()
session.filter(self.conn, block, tx)
if __name__ == '__main__':
unittest.main()