You can create a message like this:
message Container {
// One of the following will be filled in.
optional Ping ping = 1;
optional StatusUpdate status_update = 2;
optional FindWorker find_worker = 3;
}
Now send Containers over the wire instead of instances of the individual
message types.
On Tue, Oct 14, 2008 at 11:37 AM, <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I was wondering if it was possible to extract the contents of a
> serialized string without knowing ahead of time what kind of message
> it is?
>
> For example: I'm using tcp to send data back and fourth. On one side
> I create a message and serialize the data, and on the receiving side I
> 'ParseFromString' and check the information. However, I have
> different types of messages being sent so the receiving side has no
> idea what it is actually getting.
>
> example .proto file [messages actually contain field, taken out for
> simplicity] which creates 'dtm_pb2' after compiling
>
> package dtm;
> message ping {
> }
> message statusUpdate {
> }
> message findWorker {
> }
>
> so in my code on the receiving end I have:
> msg = dtm_pb2()
> msg.ParseFromString(message)
>
> this gives an error.
>
> Is there any way to initialize the msg variable and extract the
> information??
> If I knew what kind of message it was I could always use:
> msg = dtm_pb2.statusUpdate()
> msg.ParseFromString(message)
> and this would work fine, but this is no a viable solution for me.
>
> thanks,
>
> Nima
> >
>
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