py-libp2p/peer/peerstore.py
2018-11-02 16:16:46 -04:00

92 lines
2.7 KiB
Python

from .peerstore_interface import IPeerStore
from .peerdata import PeerData
from .peerinfo import PeerInfo
class PeerStore(IPeerStore):
def __init__(self):
IPeerStore.__init__(self)
self.peer_map = {}
def __create_or_get_peer(self, peer_id):
"""
Returns the peer data for peer_id or creates a new
peer data (and stores it in peer_map) if peer
data for peer_id does not yet exist
:param peer_id: peer ID
:return: peer data
"""
if peer_id in self.peer_map:
return self.peer_map[peer_id]
data = PeerData()
self.peer_map[peer_id] = data
return self.peer_map[peer_id]
def peer_info(self, peer_id):
if peer_id in self.peer_map:
peer = self.peer_map[peer_id]
return PeerInfo(peer_id, peer)
return None
def get_protocols(self, peer_id):
if peer_id in self.peer_map:
return self.peer_map[peer_id].get_protocols()
else:
raise PeerStoreError("peer ID not found")
def add_protocols(self, peer_id, protocols):
peer = self.__create_or_get_peer(peer_id)
peer.add_protocols(protocols)
def set_protocols(self, peer_id, protocols):
peer = self.__create_or_get_peer(peer_id)
peer.set_protocols(protocols)
def peers(self):
return self.peer_map.keys()
def get(self, peer_id, key):
if peer_id in self.peer_map:
val = self.peer_map[peer_id].get_metadata(key)
return val
else:
raise PeerStoreError("peer ID not found")
def put(self, peer_id, key, val):
# <<?>>
# This can output an error, not sure what the possible errors are
peer = self.__create_or_get_peer(peer_id)
peer.put_metadata(key, val)
def add_addr(self, peer_id, addr, ttl):
self.add_addrs(peer_id, [addr], ttl)
def add_addrs(self, peer_id, addrs, ttl):
# Ignore ttl for now
peer = self.__create_or_get_peer(peer_id)
peer.add_addrs(addrs)
def addrs(self, peer_id):
if peer_id in self.peer_map:
return self.peer_map[peer_id].get_addrs()
else:
raise PeerStoreError("peer ID not found")
def clear_addrs(self, peer_id):
# Only clear addresses if the peer is in peer map
if peer_id in self.peer_map:
self.peer_map[peer_id].clear_addrs()
def peers_with_addrs(self):
# Add all peers with addrs at least 1 to output
output = []
for key in self.peer_map:
if len(self.peer_map[key].get_addrs()) >= 1:
output.append(key)
return output
class PeerStoreError(KeyError):
"""Raised when peer ID is not found in peer store"""
pass