79 lines
2.3 KiB
Python
79 lines
2.3 KiB
Python
# standard imports
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import logging
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import time
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# external imports
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from chainlib.status import Status as TxStatus
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from chainsyncer.filter import SyncFilter
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from chainqueue.error import (
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NotLocalTxError,
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BackendIntegrityError,
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)
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from chaind.adapters.fs import ChaindFsAdapter
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# local imports
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from .error import QueueLockError
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logg = logging.getLogger(__name__)
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class StateFilter(SyncFilter):
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delay_limit = 3.0
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def __init__(self, chain_spec, adapter_path, tx_adapter, throttler=None):
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self.chain_spec = chain_spec
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self.adapter_path = adapter_path
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self.tx_adapter = tx_adapter
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self.throttler = throttler
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def filter(self, conn, block, tx, session=None):
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cache_tx = None
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for i in range(3):
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queue_adapter = None
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try:
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queue_adapter = ChaindFsAdapter(
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self.chain_spec,
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self.adapter_path,
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self.tx_adapter,
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None,
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)
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except BackendIntegrityError as e:
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logg.error('adapter instantiation failed: {}, one more try'.format(e))
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continue
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try:
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cache_tx = queue_adapter.get(tx.hash)
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except NotLocalTxError:
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logg.debug('skipping not local transaction {}'.format(tx.hash))
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return False
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except BackendIntegrityError as e:
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logg.error('adapter instantiation failed: {}, one more try'.format(e))
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continue
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break
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if cache_tx == None:
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raise NotLocalTxError(tx.hash)
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delay = 0.01
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while True:
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if delay > self.delay_limit:
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raise QueueLockError('The queue lock for tx {} seems to be stuck. Human meddling needed.'.format(tx.hash))
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try:
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if tx.status == TxStatus.SUCCESS:
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queue_adapter.succeed(block, tx)
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else:
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queue_adapter.fail(block, tx)
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break
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except QueueLockError as e:
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logg.debug('queue item {} is blocked, will retry: {}'.format(tx.hash, e))
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time.sleep(delay)
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delay *= 2
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if self.throttler != None:
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self.throttler.dec(tx.hash)
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return False
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