WIP safe access to unlocking sync with tool

chainsyncer/driver/base.py

@@ -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()
-

chainsyncer/filter.py

@@ -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

chainsyncer/runnable/lock.py

@@ -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)
+    if config.get('SYNCER_BACKEND') == 'fs': 
-    store = SyncStore(state_dir)
+            syncer_store_module = importlib.import_module('chainsyncer.store.fs')
-    store.setup_filter_state(factory=factory)
+            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()
+    store.start(ignore_lock=True)
-    locked_state = store.filter_state.list(store.filter_state.from_name('RESET'))
+
-    print(locked_state)
+    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__':

chainsyncer/store/base.py

@@ -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
@@ -65,7 +65,8 @@ class SyncItem:
             raise FilterDone(self.state_key)
 
 
-    def reset(self):
+    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:
@@ -102,12 +103,15 @@ 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:
+            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:
@@ -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

chainsyncer/store/rocksdb.py

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