def update(self, entry, metadata=None, msg=None):
"""
Update a message and/or metadata.
@param entry: The existing metadata entry
@param metadata: Updates to metadata. These are merged with the existing dictionary entries.
@param msg: If specified, a new message object to store in place of the current one.
"""
old_blob_id = None
if msg:
buf = StringIO.StringIO()
msg.serialize(buf)
v = buf.getvalue()
new_msg_id = self.fs.put(v)
old_blob_id = entry['blob_id']
entry['blob_id'] = new_msg_id
if metadata:
entry.update(metadata)
self.coll.save(entry, safe=True)
if old_blob_id:
self.fs.delete(old_blob_id)
def update(self, entry, metadata=None, msg=None):
"""
Update a message and/or metadata.
@param entry: The existing metadata entry
@param metadata: Updates to metadata. These are merged with the existing dictionary entries.
@param msg: If specified, a new message object to store in place of the current one.
"""
old_blob_id = None
if msg:
buf = StringIO.StringIO()
msg.serialize(buf)
v = buf.getvalue()
new_msg_id = self.fs.put(v)
old_blob_id = entry["blob_id"]
entry["blob_id"] = new_msg_id
if metadata:
entry.update(metadata)
self.coll.save(entry, safe=True)
if old_blob_id:
self.fs.delete(old_blob_id)
def publish(self, id, msg, islog=False):
buff = StringIO()
buff.seek(11)
l = msg.serialize(buff)
buff.seek(0)
struct_data = struct.Struct("<B")
buff.write(struct_data.pack(0xFF))
buff.write(struct_data.pack(NodeHandle.PROTOCOL_VER))
buff.write(struct_data.pack((l >> 0) & 0xFF))
buff.write(struct_data.pack((l >> 8) & 0xFF))
buff.write(struct_data.pack((l >> 16) & 0xFF))
buff.write(struct_data.pack((l >> 24) & 0xFF))
chk = 255 - ((((l >> 0) & 0xFF) + ((l >> 8) & 0xFF) +
((l >> 16) & 0xFF) + ((l >> 24) & 0xFF)) % 256)
buff.write(struct_data.pack(chk))
buff.write(struct_data.pack((id >> 0) & 0xFF))
buff.write(struct_data.pack((id >> 8) & 0xFF))
buff.write(struct_data.pack((id >> 16) & 0xFF))
buff.write(struct_data.pack((id >> 24) & 0xFF))
buff.seek(7)
x = buff.read()
size = len(x)
chk = 0
for i in range(0, size):
(data, ) = struct_data.unpack(x[i:i + 1])
chk += data
chk = 255 - (chk % 256)
buff.seek(l + 11)
buff.write(struct_data.pack(chk))
buff.seek(0)
if l <= NodeHandleBase.OUTPUT_SIZE:
l = -1
if not islog:
if self.hardware_ != None:
l = self.hardware_.write(buff.read())
else:
if self.loghd_ != None:
l = self.loghd_.write(buff.read())
return l
else:
return -2
def message_serialize(msg):
buf = cStringIO.StringIO()
msg.serialize(buf)
return buf.getvalue().encode('hex_codec')
def message_serialize(msg):
buf = cStringIO.StringIO()
msg.serialize(buf)
return buf.getvalue().encode('hex_codec')
