def add_node(self, node, backup_store=None):
self.nodes.append(node)
self.hash_ring = HashRing(self.nodes)
if backup_store is not None:
self.backup_stores[node] = backup_store
else:
backup_stores_path = getattr(self, 'backup_stores_path')
if backup_stores_path is not None:
path = os.path.join(backup_stores_path, node.replace(':', '_'))
if not os.path.exists(path):
os.makedirs(path)
self.backup_stores[node] = Node(path, size=512 * 1024)
def remove_node(self, node):
self.nodes.remove(node)
self.hash_ring = HashRing(self.nodes)
backup_store = self.backup_stores[node]
obj = backup_store.get()
while obj is not None:
self.local_store.put(obj)
obj = backup_store.get()
backup_store.shutdown()
del self.backup_stores[node]
def __init__(self,
nodes,
local_node=None,
rpc_server=None,
local_store=None,
backup_stores=None,
copies=1):
self.nodes = nodes
self.local_node = local_node
self.local_store = local_store
self.rpc_server = rpc_server
self.backup_stores = backup_stores
self.hash_ring = HashRing(self.nodes)
self.copies = max(min(len(self.nodes) - 1, copies), 0)
if rpc_server is not None and \
self.local_store is not None and \
self.backup_stores is not None:
self._register_rpc()
def __init__(self, nodes, copies=1):
self.nodes = nodes
self.hash_ring = HashRing(self.nodes)
self.copies = max(min(len(self.nodes) - 1, copies), 0)
self.mq = MessageQueue(nodes, copies=copies)
def add_node(self, addr):
if addr not in self.nodes:
self.nodes.append(addr)
self.hash_ring = HashRing(self.nodes)
def remove_node(self, addr):
if addr in self.nodes:
self.nodes.remove(addr)
self.hash_ring = HashRing(self.nodes)
def __init__(self, addrs, copies=1):
self.nodes = list(addrs)
self.hash_ring = HashRing(self.nodes)
self.copies = min(copies, len(self.nodes) - 1)
