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chainsyncer
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WIP safe access to unlocking sync with tool

This commit is contained in:
lash 2022-04-28 08:15:04 +00:00
parent ca82ea247f
commit ca1441d50d
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
5 changed files with 130 additions and 40 deletions
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8
chainsyncer/driver/base.py
View File

@ -142,11 +142,3 @@ class SyncDriver:
def get(self, conn):
raise NotImplementedError()
def save_filter_list(self):
raise NotImplementedError()
def load_filter_list(self):
raise NotImplementedError()

2
chainsyncer/filter.py
View File

@ -44,6 +44,8 @@ class FilterState:
self.state = self.state_store.state
self.put = self.state_store.put
self.mask = self.state_store.mask
self.name = self.state_store.name
self.set = self.state_store.set
self.next = self.state_store.next
self.move = self.state_store.move

111
chainsyncer/runnable/lock.py
View File

@ -14,11 +14,31 @@ from shep.persist import PersistedState
import chainsyncer.cli
from chainsyncer.settings import ChainsyncerSettings
from chainsyncer.store import SyncStore
from chainsyncer.filter import FilterState
from chainsyncer.filter import (
FilterState,
SyncFilter,
)
logging.basicConfig(level=logging.WARNING)
logg = logging.getLogger()
valid_fwd = [
'fwd',
'forward',
'next',
'continue',
]
valid_rwd = [
'rwd',
'rewind',
'current',
'back',
'repeat',
'replay',
]
action_is_forward = False
arg_flags = chainlib.cli.argflag_std_base | chainlib.cli.Flag.CHAIN_SPEC
argparser = chainlib.cli.ArgumentParser(arg_flags)
@ -30,6 +50,13 @@ chainsyncer.cli.process_flags(argparser, sync_flags)
args = argparser.parse_args()
if args.action in valid_fwd:
action_is_forward = True
elif args.action not in valid_rwd:
sys.stderr.write('action argument must be one of {} or {}\n'.format(valid_rwd, valid_fwd))
sys.exit(1)
base_config_dir = chainsyncer.cli.config_dir,
config = chainlib.cli.Config.from_args(args, arg_flags, base_config_dir=base_config_dir)
config = chainsyncer.cli.process_config(config, args, sync_flags)
@ -41,29 +68,81 @@ settings.process_sync_backend(config)
logg.debug('settings:\n{}'.format(str(settings)))
class FilterInNameOnly(SyncFilter):
def __init__(self, k):
self.k = k
def common_name(self):
return self.k
def main():
if settings.get('SYNCER_BACKEND') == 'mem':
raise ValueError('cannot unlock volatile state store')
if settings.get('SYNCER_BACKEND') == 'fs':
syncer_store_module = importlib.import_module('shep.store.file')
syncer_store_class = getattr(syncer_store_module, 'SimpleFileStoreFactory')
elif settings.get('SYNCER_BACKEND') == 'rocksdb':
syncer_store_module = importlib.import_module('shep.store.rocksdb')
syncer_store_class = getattr(syncer_store_module, 'RocksdbStoreFactory')
else:
raise NotImplementedError('cannot use backend: {}'.format(config.get('SYNCER_BACKEND')))
state_dir = config.get('_STATE_DIR')
factory = syncer_store_class(state_dir)
store = SyncStore(state_dir)
store.setup_filter_state(factory=factory)
if config.get('SYNCER_BACKEND') == 'fs':
syncer_store_module = importlib.import_module('chainsyncer.store.fs')
syncer_store_class = getattr(syncer_store_module, 'SyncFsStore')
elif config.get('SYNCER_BACKEND') == 'rocksdb':
syncer_store_module = importlib.import_module('chainsyncer.store.rocksdb')
syncer_store_class = getattr(syncer_store_module, 'SyncRocksDbStore')
else:
syncer_store_module = importlib.import_module(config.get('SYNCER_BACKEND'))
syncer_store_class = getattr(syncer_store_module, 'SyncStore')
logg.info('using engine {} module {}.{}'.format(config.get('SYNCER_BACKEND'), syncer_store_module.__file__, syncer_store_class.__name__))
store = syncer_store_class(state_dir)
filter_list = store.load_filter_list()
for i, k in enumerate(filter_list):
fltr = FilterInNameOnly(k)
store.register(fltr)
filter_list[i] = k.upper()
store.connect()
store.filter_state.scan()
locked_state = store.filter_state.list(store.filter_state.from_name('RESET'))
print(locked_state)
store.start(ignore_lock=True)
lock_state = store.filter_state.from_name('LOCK')
locked_item = store.filter_state.list(lock_state)
if len(locked_item) == 0:
sys.stderr.write('Sync filter in {} is not locked\n'.format(state_dir))
sys.exit(1)
elif len(locked_item) > 1:
sys.stderr.write('More than one locked item encountered in {}. That should never happen, so I do not know what to do next.\n'.format(state_dir))
sys.exit(1)
locked_item_key = locked_item[0]
locked_item = store.get(int(locked_item_key))
locked_state = store.filter_state.state(locked_item_key) - lock_state
locked_state_name = store.filter_state.name(locked_state)
logg.info('found item "{}" in locked state {}'.format(locked_item, store.filter_state.name(locked_state)))
if action_is_forward:
k = locked_state_name
filter_index = None
filter_index = filter_list.index(k)
filter_pos = filter_index + 1
filter_count = len(filter_list)
logg.debug('Locked filter {} found at position {} of {}'.format(k, filter_pos, filter_count))
if filter_pos == filter_count:
logg.info('Locked filter {} is the last filter in the list. Executing filter reset'.format(k))
locked_item.reset(check_incomplete=False)
else:
locked_item.advance(ignore_lock=True)
store.filter_state.unset(locked_item_key, lock_state)
#next_filter = filter_list[filter_pos]
#next_state = store.filter_state.from_name(next_filter)
#store.filter_state.move(next_state)
else:
filter_mask = 0xf
filter_state = store.filter_state.mask(locked_state, filter_mask)
logg.info('Chosen action is "{}": will continue execution at previous filter {}'.format(args.action, store.filter_state.name(filter_state)))
store.filter_state.unset(locked_item_key, lock_state)
if __name__ == '__main__':

48
chainsyncer/store/base.py
View File

@ -35,7 +35,7 @@ def sync_state_deserialize(b):
# NOT thread safe
class SyncItem:
def __init__(self, offset, target, sync_state, filter_state, started=False, ignore_invalid=False):
def __init__(self, offset, target, sync_state, filter_state, started=False, ignore_lock=False):
self.offset = offset
self.target = target
self.sync_state = sync_state
@ -47,7 +47,7 @@ class SyncItem:
(self.cursor, self.tx_cursor, self.target) = sync_state_deserialize(v)
if self.filter_state.state(self.state_key) & self.filter_state.from_name('LOCK') and not ignore_invalid:
if self.filter_state.state(self.state_key) & self.filter_state.from_name('LOCK') > 0 and not ignore_lock:
raise LockError(self.state_key)
self.count = len(self.filter_state.all(pure=True)) - 4
@ -65,11 +65,12 @@ class SyncItem:
raise FilterDone(self.state_key)
def reset(self):
if self.filter_state.state(self.state_key) & self.filter_state.from_name('LOCK') > 0:
raise LockError('reset attempt on {} when state locked'.format(self.state_key))
if self.filter_state.state(self.state_key) & self.filter_state.from_name('DONE') == 0:
raise IncompleteFilterError('reset attempt on {} when incomplete'.format(self.state_key))
def reset(self, check_incomplete=True):
if check_incomplete:
if self.filter_state.state(self.state_key) & self.filter_state.from_name('LOCK') > 0:
raise LockError('reset attempt on {} when state locked'.format(self.state_key))
if self.filter_state.state(self.state_key) & self.filter_state.from_name('DONE') == 0:
raise IncompleteFilterError('reset attempt on {} when incomplete'.format(self.state_key))
self.filter_state.move(self.state_key, self.filter_state.from_name('RESET'))
@ -102,13 +103,16 @@ class SyncItem:
v = self.filter_state.state(self.state_key)
def advance(self):
def advance(self, ignore_lock=False):
if self.skip_filter:
raise FilterDone()
self.__check_done()
if self.filter_state.state(self.state_key) & self.filter_state.from_name('LOCK') > 0:
raise LockError('advance attempt on {} when state locked'.format(self.state_key))
if ignore_lock:
self.filter_state.unset(self.state_key, self.filter_state.from_name('LOCK'))
else:
raise LockError('advance attempt on {} when state locked'.format(self.state_key))
done = False
try:
self.filter_state.next(self.state_key)
@ -192,20 +196,20 @@ class SyncStore:
self.filter_state.register(fltr)
def start(self, offset=0, target=-1):
def start(self, offset=0, target=-1, ignore_lock=False):
if self.started:
return
self.save_filter_list()
self.load(target)
self.load(target, ignore_lock=ignore_lock)
if self.first:
state_bytes = sync_state_serialize(offset, 0, target)
block_number_str = str(offset)
self.state.put(block_number_str, contents=state_bytes)
self.filter_state.put(block_number_str)
o = SyncItem(offset, target, self.state, self.filter_state)
o = SyncItem(offset, target, self.state, self.filter_state, ignore_lock=ignore_lock)
self.items[offset] = o
self.item_keys.append(offset)
elif offset > 0:
@ -230,7 +234,7 @@ class SyncStore:
self.state.put(str(item.cursor), contents=state_bytes)
def load(self, target):
def load(self, target, ignore_lock=False):
self.state.sync(self.state.NEW)
self.state.sync(self.state.SYNC)
@ -254,7 +258,7 @@ class SyncStore:
item_target = target
if i < lim:
item_target = thresholds[i+1]
o = SyncItem(block_number, item_target, self.state, self.filter_state, started=True)
o = SyncItem(block_number, item_target, self.state, self.filter_state, started=True, ignore_lock=ignore_lock)
self.items[block_number] = o
self.item_keys.append(block_number)
logg.info('added existing {}'.format(o))
@ -271,7 +275,6 @@ class SyncStore:
def get(self, k):
logg.debug('items {}'.format(self.items.keys()))
return self.items[k]
@ -289,3 +292,18 @@ class SyncStore:
def disconnect(self):
self.filter_state.disconnect()
def save_filter_list(self):
raise NotImplementedError()
def load_filter_list(self):
raise NotImplementedError()
def peek_next_filter(self):
pass
def peek_current_filter(self):
pass

1
chainsyncer/store/rocksdb.py
View File

@ -77,4 +77,3 @@ class SyncRocksDbStore(SyncStore):
v = self.target_db.get('filter_list')
v = v.decode('utf-8')
return v.split(',')