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findValue inlinecallbacks refactor

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Jack Robison 2018-02-20 13:39:14 -05:00
parent 43896c8d17
commit 16fcc3f5c1
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1 changed files with 17 additions and 24 deletions
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41
lbrynet/dht/node.py
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@ -418,33 +418,26 @@ class Node(object):
to the specified key
@rtype: twisted.internet.defer.Deferred
"""
# Prepare a callback for this operation
outerDf = defer.Deferred()
def checkResult(result):
if isinstance(result, dict):
# We have found the value; now see who was the closest contact without it...
# ...and store the key/value pair
outerDf.callback(result)
else:
# The value wasn't found, but a list of contacts was returned
# Now, see if we have the value (it might seem wasteful to search on the network
# first, but it ensures that all values are properly propagated through the
# network
if self._dataStore.hasPeersForBlob(key):
# Ok, we have the value locally, so use that
peers = self._dataStore.getPeersForBlob(key)
# Send this value to the closest node without it
outerDf.callback({key: peers})
else:
# Ok, value does not exist in DHT at all
outerDf.callback(result)
# Execute the search
iterative_find_result = yield self._iterativeFind(key, rpc='findValue')
checkResult(iterative_find_result)
result = yield outerDf
defer.returnValue(result)
if isinstance(iterative_find_result, dict):
# We have found the value; now see who was the closest contact without it...
# ...and store the key/value pair
defer.returnValue(iterative_find_result)
else:
# The value wasn't found, but a list of contacts was returned
# Now, see if we have the value (it might seem wasteful to search on the network
# first, but it ensures that all values are properly propagated through the
# network
if self._dataStore.hasPeersForBlob(key):
# Ok, we have the value locally, so use that
# Send this value to the closest node without it
peers = self._dataStore.getPeersForBlob(key)
defer.returnValue({key: peers})
else:
# Ok, value does not exist in DHT at all
defer.returnValue(iterative_find_result)
def addContact(self, contact):
""" Add/update the given contact; simple wrapper for the same method