89 lines
2.2 KiB
Python
89 lines
2.2 KiB
Python
# standard imports
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import uuid
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import logging
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import time
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logg = logging.getLogger()
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def noop_progress(s):
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logg.debug(s)
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class Syncer:
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running_global = True
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yield_delay=0.005
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def __init__(self, backend, progress_callback=noop_progress):
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self.cursor = None
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self.running = True
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self.backend = backend
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self.filter = []
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self.progress_callback = progress_callback
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def chain(self):
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"""Returns the string representation of the chain spec for the chain the syncer is running on.
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:returns: Chain spec string
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:rtype: str
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"""
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return self.bc_cache.chain()
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def add_filter(self, f):
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self.filter.append(f)
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class MinedSyncer(Syncer):
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def __init__(self, backend, progress_callback):
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super(MinedSyncer, self).__init__(backend, progress_callback)
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def loop(self, interval, getter):
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while self.running and Syncer.running_global:
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while True:
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block_hash = self.get(getter)
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if block_hash == None:
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break
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self.process(getter, block_hash)
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time.sleep(self.yield_delay)
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time.sleep(interval)
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class HeadSyncer(MinedSyncer):
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def __init__(self, backend, progress_callback):
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super(HeadSyncer, self).__init__(backend, progress_callback)
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def process(self, getter, block):
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logg.debug('process {}'.format(block))
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i = 0
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tx = None
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while True:
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try:
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#self.filter[0].handle(getter, block, None)
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tx = block.tx(i)
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self.progress_callback('processing {}'.format(tx))
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self.backend.set(block.number, i)
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for f in self.filter:
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f.handle(getter, block, tx)
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self.progress_callback('applied filter {} on {}'.format(f.name(), tx))
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except IndexError as e:
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self.backend.set(block.number + 1, 0)
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break
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i += 1
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def get(self, getter):
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(block_number, tx_number) = self.backend.get()
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block_hash = []
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uu = uuid.uuid4()
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res = getter.get(block_number)
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logg.debug('get {}'.format(res))
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return res
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