def cleanup(self):
self.ring.remove(self.here)
informed = set()
if self.ring.nodes:
for key, value in ((a, b) for (a, b) in self.store.items() if b):
dest = self.get_node(key)
try:
if location.loc2str(dest) not in informed:
remote_call('remove', dest, self.location, [self.location])
remote_call('ping', dest)
informed.add(location.loc2str(dest))
remote_call('put', dest, key, value)
except location.NodeNotFound, tx:
print "not found"
pass
if not informed:
for dest in location.select_peers(self.ring.nodes):
try:
remote_call('remove', location.str2loc(dest), self.location, [self.location])
informed.add(dest)
break
except location.NodeNotFound, tx:
self.ring.remove(location.loc2str(tx.location))
def add(self, loc, authorities):
"""
Parameters:
- location
- authorities
"""
key = location.loc2str(loc)
authorities.append(self.location)
destinations = location.select_peers(self.ring.nodes.difference(map(location.loc2str,authorities)))
for destination in destinations:
try:
remote_call('add', location.str2loc(destination), loc, authorities)
break
except location.NodeNotFound, tx:
self.remove(tx.location, map(location.str2loc, self.ring.nodes))
def get(self, key):
"""
Parameters:
- key
"""
dest = self.get_node(key)
if location.loc2str(dest) == self.here:
if key in self.store:
print 'found %s' % key
return self.store[key]
else:
try:
return remote_call('get', dest, key)
except location.NodeNotFound, tx:
self.remove(tx.location, map(location.str2loc, self.ring.nodes))
return ''
def put(self, key, value):
"""
Parameters:
- key
- value
"""
dest = self.get_node(key)
if location.loc2str(dest) == self.here:
print 'received %s' % key
self.store[key] = value
return
else:
try:
remote_call('put', dest, key, value)
except location.NodeNotFound, tx:
self.remove(tx.location, map(location.str2loc, self.ring.nodes))
return
def add(self, loc, authorities):
"""
Parameters:
- location
- authorities
"""
key = location.loc2str(loc)
authorities.append(self.location)
destinations = location.select_peers(self.ring.nodes.difference(map(location.loc2str,authorities)))
for destination in destinations:
try:
remote_call('add', location.str2loc(destination), loc, authorities)
break
except location.NodeNotFound, tx:
self.remove(tx.location, map(location.str2loc, self.ring.nodes))
locstr = location.loc2str(loc)
self.ring.append(locstr)
sleep(WAITPERIOD)
for key, value in self.store.items():
if location.loc2str(self.get_node(key)) == locstr:
remote_call('put', loc, key, value)
del self.store[key]
print 'dropped %s' % key
print "added %s:%d" % (loc.address, loc.port)
def debug(self):
a = "self.location: %r\n" % self.location
a += "self.ring.nodes:\n%r\n" % self.ring.nodes
a += "self.store:\n%r\n" % self.store
print a