chaintool/chainsyncer
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Reinstate start tx setter

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This commit is contained in:
nolash 2021-04-15 14:11:06 +02:00
parent b4be9ff04c
commit d1077bf87a
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
6 changed files with 45 additions and 29 deletions
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2
chainsyncer/backend/file.py
View File

@ -156,7 +156,7 @@ class SyncerFileBackend:
def get(self):
return (self.block_height_cursor, self.tx_index_cursor)
return ((self.block_height_cursor, self.tx_index_cursor), self.filter)
def set(self, block_height, tx_index):

14
chainsyncer/backend/memory.py
View File

@ -15,7 +15,6 @@ class MemBackend:
self.target_block = target_block
self.db_session = None
self.filter_names = []
self.filter_values = []
def connect(self):
@ -30,8 +29,6 @@ class MemBackend:
logg.debug('stateless backend received {} {}'.format(block_height, tx_height))
self.block_height = block_height
self.tx_height = tx_height
for i in range(len(self.filter_values)):
self.filter_values[i] = False
def get(self):
@ -44,12 +41,17 @@ class MemBackend:
def register_filter(self, name):
self.filter_names.append(name)
self.filter_values.append(False)
def complete_filter(self, n):
self.filter_values[n-1] = True
logg.debug('set filter {}'.format(self.filter_names[n-1]))
v = 1 << (n-1)
self.flags |= v
logg.debug('set filter {} {}'.format(self.filter_names[n-1], v))
def reset_filter(self):
logg.debug('reset filters')
self.flags = 0
def __str__(self):

22
chainsyncer/driver.py
View File

@ -19,7 +19,7 @@ from chainsyncer.error import (
NoBlockForYou,
)
logg = logging.getLogger(__name__)
logg = logging.getLogger().getChild(__name__)
def noop_callback(block, tx):
@ -30,6 +30,7 @@ class Syncer:
running_global = True
yield_delay=0.005
signal_request = [signal.SIGINT, signal.SIGTERM]
signal_set = False
def __init__(self, backend, pre_callback=None, block_callback=None, post_callback=None):
@ -41,8 +42,8 @@ class Syncer:
self.pre_callback = pre_callback
self.post_callback = post_callback
if not Syncer.signal_set:
signal.signal(signal.SIGINT, Syncer.__sig_terminate)
signal.signal(signal.SIGTERM, Syncer.__sig_terminate)
for sig in Syncer.signal_request:
signal.signal(sig, Syncer.__sig_terminate)
Syncer.signal_set = True
@ -76,7 +77,7 @@ class Syncer:
self.backend.set(block.number, tx.index)
self.filter.apply(conn, block, tx)
class BlockPollSyncer(Syncer):
def __init__(self, backend, pre_callback=None, block_callback=None, post_callback=None):
@ -84,10 +85,9 @@ class BlockPollSyncer(Syncer):
def loop(self, interval, conn):
#(g, flags) = self.backend.get()
#last_tx = g[1]
#last_block = g[0]
#self.progress_callback(last_block, last_tx, 'loop started')
(pair, fltr) = self.backend.get()
start_tx = pair[1]
while self.running and Syncer.running_global:
if self.pre_callback != None:
self.pre_callback()
@ -108,6 +108,8 @@ class BlockPollSyncer(Syncer):
self.block_callback(block, None)
last_block = block
if start_tx > 0:
block.txs = block.txs[start_tx:]
self.process(conn, block)
start_tx = 0
time.sleep(self.yield_delay)
@ -120,7 +122,8 @@ class HeadSyncer(BlockPollSyncer):
def process(self, conn, block):
logg.debug('process block {}'.format(block))
i = 0
(pair, fltr) = self.backend.get()
i = pair[1] # set tx index from previous
tx = None
while True:
try:
@ -147,6 +150,7 @@ class HeadSyncer(BlockPollSyncer):
if r == None:
raise NoBlockForYou()
b = Block(r)
b.txs = b.txs[height[1]:]
return b

4
chainsyncer/filter.py
View File

@ -34,8 +34,12 @@ class SyncFilter:
self.backend.disconnect()
raise BackendError('database connection fail: {}'.format(e))
i = 0
(pair, flags) = self.backend.get()
for f in self.filters:
i += 1
if flags & (1 << (i - 1)) > 0:
logg.debug('skipping previously applied filter {}'.format(str(f)))
continue
logg.debug('applying filter {}'.format(str(f)))
f.filter(conn, block, tx, session)
self.backend.complete_filter(i)

21
chainsyncer/unittest/base.py
View File

@ -1,5 +1,6 @@
# standard imports
import os
import logging
# external imports
from hexathon import add_0x
@ -8,10 +9,12 @@ from hexathon import add_0x
from chainsyncer.driver import HistorySyncer
from chainsyncer.error import NoBlockForYou
logg = logging.getLogger().getChild(__name__)
class MockTx:
def __init__(self, tx_hash, index):
def __init__(self, index, tx_hash):
self.hash = tx_hash
self.index = index
@ -39,21 +42,23 @@ class TestSyncer(HistorySyncer):
if self.backend.block_height == self.backend.target_block:
self.running = False
raise NoBlockForYou()
if self.backend.block_height > len(self.tx_counts):
return []
block_txs = []
for i in range(self.tx_counts[self.backend.block_height]):
block_txs.append(add_0x(os.urandom(32).hex()))
if self.backend.block_height < len(self.tx_counts):
for i in range(self.tx_counts[self.backend.block_height]):
block_txs.append(add_0x(os.urandom(32).hex()))
logg.debug('get tx height {}'.format(self.backend.tx_height))
return MockBlock(self.backend.block_height, block_txs)
# TODO: implement mock conn instead, and use HeadSyncer.process
def process(self, conn, block):
i = 0
for tx in block.txs:
self.process_single(conn, block, tx)
self.process_single(conn, block, block.tx(i))
self.backend.reset_filter()
i += 1
self.backend.set(self.backend.block_height + 1, 0)

11
tests/test_interrupt.py
View File

@ -5,7 +5,6 @@ import os
# external imports
from chainlib.chain import ChainSpec
from hexathon import add_0x
# local imports
from chainsyncer.backend.memory import MemBackend
@ -30,9 +29,10 @@ class NaughtyCountExceptionFilter:
def filter(self, conn, block, tx, db_session=None):
self.c += 1
if self.c == self.croak:
self.croak = -1
raise RuntimeError('foo')
self.c += 1
def __str__(self):
@ -58,7 +58,7 @@ class TestInterrupt(unittest.TestCase):
def setUp(self):
self.chain_spec = ChainSpec('foo', 'bar', 42, 'baz')
self.backend = MemBackend(self.chain_spec, None, target_block=2)
self.backend = MemBackend(self.chain_spec, None, target_block=4)
self.syncer = TestSyncer(self.backend, [4, 2, 3])
def test_filter_interrupt(self):
@ -66,7 +66,7 @@ class TestInterrupt(unittest.TestCase):
fltrs = [
CountFilter('foo'),
CountFilter('bar'),
NaughtyCountExceptionFilter('xyzzy', 2),
NaughtyCountExceptionFilter('xyzzy', 3),
CountFilter('baz'),
]
@ -76,12 +76,13 @@ class TestInterrupt(unittest.TestCase):
try:
self.syncer.loop(0.1, None)
except RuntimeError:
logg.info('caught croak')
pass
self.syncer.loop(0.1, None)
for fltr in fltrs:
logg.debug('{} {}'.format(str(fltr), fltr.c))
self.assertEqual(fltr.c, 9)
#self.assertEqual(fltr.c, 11)
if __name__ == '__main__':