def test_retry_logic(self):
peer = PeerId('testnet')
peer.retry_attempts = settings.MAX_PEER_CONNECTION_ATTEMPS
self.assertFalse(peer.can_retry(0))
peer.retry_attempts = 0
# should still fail as the RETRIES_EXCEEDED flag is already set
self.assertFalse(peer.can_retry(0))
# remove flag and try again
from hathor.p2p.peer_id import PeerFlags
peer.flags.remove(PeerFlags.RETRIES_EXCEEDED)
self.assertTrue(peer.can_retry(0))
peer.retry_timestamp = 100
self.assertFalse(peer.can_retry(0))
def connect_to_if_not_connected(self, peer: PeerId, now: int) -> None:
""" Attempts to connect if it is not connected to the peer.
"""
import random
if not peer.entrypoints:
return
if peer.id in self.connected_peers:
return
assert peer.id is not None
if peer.can_retry(now):
self.connect_to(random.choice(peer.entrypoints), peer)
def connect_to_if_not_connected(self, peer: PeerId, now: int) -> None:
""" Attempts to connect if it is not connected to the peer.
"""
if not peer.entrypoints:
# It makes no sense to keep storing peers that have disconnected and have no entrypoints
# We will never be able to connect to them anymore and they will only keep spending memory
# and other resources when used in APIs, so we are removing them here
if peer.id not in self.connected_peers:
self.peer_storage.remove(peer)
return
if peer.id in self.connected_peers:
return
assert peer.id is not None
if peer.can_retry(now):
self.connect_to(self.rng.choice(peer.entrypoints), peer)
def test_retry_logic(self):
peer = PeerId('testnet')
self.assertTrue(peer.can_retry(0))
retry_interval = peer.retry_interval
peer.increment_retry_attempt(0)
self.assertFalse(peer.can_retry(0))
self.assertFalse(peer.can_retry(retry_interval - 1))
self.assertTrue(peer.can_retry(retry_interval))
self.assertTrue(peer.can_retry(retry_interval + 1))
peer.increment_retry_attempt(0)
self.assertFalse(peer.can_retry(retry_interval))
retry_interval *= settings.PEER_CONNECTION_RETRY_INTERVAL_MULTIPLIER
self.assertFalse(peer.can_retry(retry_interval - 1))
self.assertTrue(peer.can_retry(retry_interval))
self.assertTrue(peer.can_retry(retry_interval))
# Retry until we reach max retry interval.
while peer.retry_interval < settings.PEER_CONNECTION_RETRY_MAX_RETRY_INTERVAL:
peer.increment_retry_attempt(0)
# We need to call it once more because peer.retry_interval is always one step behind.
peer.increment_retry_attempt(0)
# Confirm we are at the max retry interval.
self.assertFalse(
peer.can_retry(settings.PEER_CONNECTION_RETRY_MAX_RETRY_INTERVAL -
1))
self.assertTrue(
peer.can_retry(settings.PEER_CONNECTION_RETRY_MAX_RETRY_INTERVAL))
self.assertTrue(
peer.can_retry(settings.PEER_CONNECTION_RETRY_MAX_RETRY_INTERVAL +
1))
# It shouldn't change with another retry.
peer.increment_retry_attempt(0)
self.assertFalse(
peer.can_retry(settings.PEER_CONNECTION_RETRY_MAX_RETRY_INTERVAL -
1))
self.assertTrue(
peer.can_retry(settings.PEER_CONNECTION_RETRY_MAX_RETRY_INTERVAL))
self.assertTrue(
peer.can_retry(settings.PEER_CONNECTION_RETRY_MAX_RETRY_INTERVAL +
1))
# Finally, reset it.
peer.reset_retry_timestamp()
self.assertTrue(peer.can_retry(0))
