/
cache_client.py
91 lines (74 loc) · 2.43 KB
/
cache_client.py
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import sys
import socket
from node_ring import NodeRing
from sample_data import USERS
from server_config import NODES
from pickle_hash import serialize_GET, serialize_PUT, serialize_DELETE
from bloom_filter import BloomFilter
from lru_cache import lru_cache
#
# Bloom Filter ########
# Calculation with n=500 & p=0.01
# Then k=7 & m=4797
#
bloomFilter = BloomFilter(500,0.01)
BUFFER_SIZE = 1024
class UDPClient():
def __init__(self, host, port):
self.host = host
self.port = int(port)
def send(self, request):
print('Connecting to server at {}:{}'.format(self.host, self.port))
try:
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.sendto(request, (self.host, self.port))
response, ip = s.recvfrom(BUFFER_SIZE)
return response
except socket.error:
print("Error! {}".format(socket.error))
exit()
lru_cache(5)
def put(self, key, payload):
bloomFilter.add(key)
return self.send(payload)
lru_cache(5)
def get_request(self, key, payload):
if bloomFilter.is_member(key):
return self.send(payload)
lru_cache(5)
def delete(self, key, payload):
if bloomFilter.is_member(key):
return self.send(payload)
def process(udp_clients):
hash_codes = set()
# PUT all users.
for u in USERS:
data_bytes, key = serialize_PUT(u)
ring = NodeRing(NODES)
server_index = NODES.index(ring.get_node(key))
response = udp_clients[server_index].put(key,data_bytes)
hash_codes.add(response.decode())
print(response)
print(f"Number of Users={len(USERS)}\nNumber of Users Cached={len(hash_codes)}")
# GET all users.
for hc in hash_codes:
print(hc)
data_bytes, key = serialize_GET(hc)
ring = NodeRing(NODES)
server_index = NODES.index(ring.get_node(key))
response = udp_clients[server_index].get_request(hc, data_bytes)
print(response)
# Delete all Users
for hc in hash_codes:
print(hc)
data_bytes, key = serialize_DELETE(hc)
ring = NodeRing(NODES)
server_index = NODES.index(ring.get_node(key))
response = udp_clients[server_index].delete(key,data_bytes)
print(response)
if __name__ == "__main__":
clients = [
UDPClient(server['host'], server['port'])
for server in NODES
]
process(clients)