def handle_commit(self, client, db_name):
# C
log(20, 'Commit %s' % db_name)
storage = self.storages[db_name]
self._sync_storage(db_name, storage)
invalid = client.invalid[db_name]
yield client.write(int4_to_str(len(invalid)))
yield client.write(join_bytes(invalid))
yield client.flush()
invalid.clear()
tdata_len = str_to_int4((yield client.read(4)))
if tdata_len == 0:
# Client decided not to commit (e.g. conflict)
return
tdata = yield client.read(tdata_len)
logging_debug = is_logging(10)
logging_debug and log(10, 'Committing %s bytes', tdata_len)
storage.begin()
i = 0
oids = []
while i < tdata_len:
rlen = str_to_int4(tdata[i:i+4])
i += 4
oid = tdata[i:i+8]
record = tdata[i+8:i+rlen]
i += rlen
if logging_debug:
class_name = extract_class_name(record)
log(10, ' oid=%-6s rlen=%-6s %s',
str_to_int8(oid), rlen, class_name)
storage.store(oid, record)
oids.append(oid)
assert i == tdata_len
oid_set = set(oids)
for c in self.clients:
if c is not client:
if oid_set.intersection(c.unused_oids[db_name]):
raise ClientError('invalid oid: %r' % oid)
try:
handle_invalidations = (
lambda oids: self._handle_invalidations(db_name, oids))
storage.end(handle_invalidations=handle_invalidations)
except ConflictError:
log(20, 'Conflict during commit')
yield client.write(STATUS_INVALID)
else:
self._report_load_record(storage)
log(20, 'Committed %3s objects %s bytes at %s',
len(oids), tdata_len, datetime.now())
yield client.write(STATUS_OKAY)
client.unused_oids[db_name] -= oid_set
for c in self.clients:
if c is not client:
c.invalid[db_name].update(oids)
storage.d_bytes_since_pack += tdata_len + 8
def serve_to_client(self, client_socket):
client = ConnectedClient(client_socket)
# Initialize per-storage state for the new client.
client.invalid = dict(
(db_name, set()) for db_name in self.storages)
client.unused_oids = dict(
(db_name, set()) for db_name in self.storages)
self.clients.add(client)
while not client.closed:
try:
command = yield client.read(1)
except (ConnectionClosed, SocketError):
break
else:
if command in self.handlers:
handler_name = self.handlers[command]
handler = getattr(self, handler_name)
yield handler(client)
elif command in self.db_handlers:
handler_name = self.db_handlers[command]
handler = getattr(self, handler_name)
# Get database name.
name_length = str_to_int4((yield client.read(4)))
db_name = yield client.read(name_length)
yield handler(client, db_name)
yield client.flush()
log(20, 'Connection closed.')
self.clients.remove(client)
def handle_V(self, s):
# Verify protocol version match.
client_protocol = read(s, 4)
log(10, 'Client Protocol: %s', str_to_int4(client_protocol))
assert len(self.protocol) == 4
write(s, self.protocol)
if client_protocol != self.protocol:
raise ClientError("Protocol not supported.")
def handle_V(self, s):
# Verify protocol version match.
client_protocol = read(s, 4)
log(10, 'Client Protocol: %s', str_to_int4(client_protocol))
assert len(self.protocol) == 4
write(s, self.protocol)
if client_protocol != self.protocol:
raise ClientError("Protocol not supported.")
def unpack_record(record):
"""(record:str) -> oid:str, data:str, refs:str
The inverse of pack_record().
"""
oid = record[:8]
data_length = str_to_int4(record[8:12])
data_end = 12 + data_length
data = record[12:data_end]
refs = record[data_end:]
return oid, data, refs
def handle_bulk_read(self, client, db_name):
# B
log(20, 'Bulk read %s' % db_name)
storage = self.storages[db_name]
number_of_oids = str_to_int4((yield client.read(4)))
oid_str_len = 8 * number_of_oids
oid_str = yield client.read(oid_str_len)
oids = split_oids(oid_str)
for oid in oids:
yield self._send_load_response(client, db_name, storage, oid)
def unpack_record(record):
"""(record:str) -> oid:str, data:str, refs:str
The inverse of pack_record().
"""
oid = record[:8]
data_length = str_to_int4(record[8:12])
data_end = 12 + data_length
data = record[12:data_end]
refs = record[data_end:]
return oid, data, refs
def handle_C(self, s):
# commit
self._sync_storage()
client = self._find_client(s)
write_all(s,
int4_to_str(len(client.invalid)), join_bytes(client.invalid))
client.invalid.clear()
tdata = read_int4_str(s)
if len(tdata) == 0:
return # client decided not to commit (e.g. conflict)
logging_debug = is_logging(10)
logging_debug and log(10, 'Committing %s bytes', len(tdata))
self.storage.begin()
i = 0
oids = []
while i < len(tdata):
rlen = str_to_int4(tdata[i:i+4])
i += 4
oid = tdata[i:i+8]
record = tdata[i+8:i+rlen]
i += rlen
if logging_debug:
class_name = extract_class_name(record)
log(10, ' oid=%-6s rlen=%-6s %s',
str_to_int8(oid), rlen, class_name)
self.storage.store(oid, record)
oids.append(oid)
assert i == len(tdata)
oid_set = set(oids)
for other_client in self.clients:
if other_client is not client:
if oid_set.intersection(other_client.unused_oids):
raise ClientError("invalid oid: %r" % oid)
try:
self.storage.end(handle_invalidations=self._handle_invalidations)
except ConflictError:
log(20, 'Conflict during commit')
write(s, STATUS_INVALID)
else:
self._report_load_record()
log(20, 'Committed %3s objects %s bytes at %s',
len(oids), len(tdata), datetime.now())
write(s, STATUS_OKAY)
client.unused_oids -= oid_set
for c in self.clients:
if c is not client:
c.invalid.update(oids)
self.bytes_since_pack += len(tdata) + 8
def handle_C(self, s):
# commit
self._sync_storage()
client = self._find_client(s)
write_all(s, int4_to_str(len(client.invalid)),
join_bytes(client.invalid))
client.invalid.clear()
tdata = read_int4_str(s)
if len(tdata) == 0:
return # client decided not to commit (e.g. conflict)
logging_debug = is_logging(10)
logging_debug and log(10, 'Committing %s bytes', len(tdata))
self.storage.begin()
i = 0
oids = []
while i < len(tdata):
rlen = str_to_int4(tdata[i:i + 4])
i += 4
oid = tdata[i:i + 8]
record = tdata[i + 8:i + rlen]
i += rlen
if logging_debug:
class_name = extract_class_name(record)
log(10, ' oid=%-6s rlen=%-6s %s', str_to_int8(oid), rlen,
class_name)
self.storage.store(oid, record)
oids.append(oid)
assert i == len(tdata)
oid_set = set(oids)
for other_client in self.clients:
if other_client is not client:
if oid_set.intersection(other_client.unused_oids):
raise ClientError("invalid oid: %r" % oid)
try:
self.storage.end(handle_invalidations=self._handle_invalidations)
except ConflictError:
log(20, 'Conflict during commit')
write(s, STATUS_INVALID)
else:
self._report_load_record()
log(20, 'Committed %3s objects %s bytes at %s', len(oids),
len(tdata), datetime.now())
write(s, STATUS_OKAY)
client.unused_oids -= oid_set
for c in self.clients:
if c is not client:
c.invalid.update(oids)
self.bytes_since_pack += len(tdata) + 8
def check_int4_to_str_str_to_int4(self):
for x in range(3):
assert len(int4_to_str(x)) == 4
assert x == str_to_int4(int4_to_str(x))