[protobuf] Service passing
Hi,
Suppose I have a class and it's base class. I'm writing the protobuf
protocol to use their methods.
class Base{
}
class Foo:Base{
}
They share some functionality, is there a way to avoid rewriting code by
passing the service?
For example:
service BaseProto{
rpc SomeFunction()
}
service FooProto{
**Passing the service here instead of rewriting SomeFunction()
}
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[protobuf] C++ generated code support MessageOptions?
version: protocolbuffer 3.12.1
in proto:
syntax = "proto3";
import "google/protobuf/descriptor.proto";
package proto;
extend google.protobuf.MessageOptions {
int32 message_id = 59153;
}
message TestMessageId {
option (message_id) = 106;
}
in C#(working)
if (Proto.TestMessageId.Descriptor.CustomOptions.TryGetInt32(59153, out int
messageId))
{
Console.WriteLine("value:{0}", messageId);
}
in C++(not working):
auto message_id =
proto::TestMessageId::descriptor()->options().GetExtension(proto::message_id);
std::cout << message_id << std::endl;
I expect message_id is 106. C# code is working but C++ code always return
0. Is my way is wrong? How can I get message option value in C++?
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Re: [protobuf] Parse sub message from binary encoding
Why not just parse the entire parent message? But if you really want to
avoid that for some reason, probably the easiest approach is to parse the
binary as an EmptyMessage, then look through the unknown fields for your
submessage field and parse the submessage from there.
On Mon, May 25, 2020 at 2:28 AM R P wrote:
> Hello
>
> I want to parse a sub message from a binary super message.
>
> I have found some useful information about message encoding here:
> https://developers.google.com/protocol-buffers/docs/encoding#embedded
>
> From the link:
>
> message Test1 { optional int32 a = 1; }
> message Test3 { optional Test1 c = 3; }
>
> Let's say i have a binary representation of a Test3 message with the sub
> message field 'a' is set to 150:
> 1a 03 08 96 01
>
> Is there a method to parse Test1 message from this binary encoding?
>
> BR
> Rainer
>
> https://developers.google.com/protocol-buffers/docs/encoding#embedded
>
> https://developers.google.com/protocol-buffers/docs/encoding#embedded
>
> https://developers.google.com/protocol-buffers/docs/encoding#embedded
>
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>
> .
>
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