protocol-buffers

I seem unable to find a way to verify the value of a field inside a protobuf message without explicitly invoking its getter. I see examples around that make usage of Descriptors.FieldDescriptor instances to reach inside the message map, but they are either iterator-based or driven by field number. Once I have the map: Map<Descriptors.FieldDescriptor, Object> allFields = myMsg.getAllFields(); how can I get the value of field "fieldXyz" ? I know that I can use myMsg.getFieldXyz() , but this is not usable in a systematic way. If there is no way to access field values by their names, I'd like to

I couldn't find anywhere a possibility to print a human friendly content of a Google Protobuf message. Is there an equivalent in Python for Java's toString() or C++'s DebugString() ? If you're using the protobuf package, the print function/statement will give you a human-readable representation of the message, because of the __str__ method :-). Here's an example for read/write human friendly text file using protobuf 2.0 in python . from google.protobuf import text_format read from a text file f = open('a.txt', 'r') address_book = addressbook_pb2.AddressBook() # replace with your own message

Is it possible to define Protocol Buffers using Java? That is instead of service Greeter { rpc SayHello (HelloRequest) returns (HelloReply) {} } I would like to have public interface Greeter { @Grpc HelloReply sayHello (HelloRequest req); } @GrpcMessage() public class HelloReply{ @GrpcField(1) string name; } That is annotation like Hibernate/JPA over my POJO, instead of heaps of generated code. I only could find Protocol Buffers Dynamic Schema https://github.com/os72/protobuf-dynamic Have a look at protostuff: https://github.com/protostuff/protostuff It supports what you want for protobuf

I want to attach a UUID to a field in my protobuf User message example. message User { // field containing id as UUID type required string email; optional string name; } I know that protobuf messages do not yet support the UUID type. I've read that the best approach is to have a UUID message type. So I'm guessing my User message would import my UUID message proto definition and use it as a field type like so: import "myproject/UUID.proto"; message User { required UUID id; required string email; optional string name; } My question is, how will the UUID message look like, and how will I encode

In Protocol Buffer version 3, I'm trying to figure out the best way to have a optional integer value, where zero and absent should be distinct cases. Best I can figure is making a type: message int64Option { oneof option { bool empty = 14; int64 value = 15; } } Is this a good idea, or is there a better way? There are two main options for this in proto3. The first is to use a oneof like you suggested, but actually you only need to have one item in the oneof : oneof option { int64 value = 15; } Oneof fields have a notion of presence so you can still determine whether value is absent or zero. The

I've been trying since the morning but I didnt achieve what I wanted. I tried DispatchQueue.main.async and completion block but my "Submit" button in the UI still freezes waiting for the data to be returned from the server. This is my code: func createData(request:Crudpb_CreateRequest, with completion: @escaping (String) -> Void) throws { DispatchQueue.main.async { self.response = try! self.client.create(request) // <---- How to handle error for this server call when the server is not available or is down? completion(self.response.result) } } I just noticed Im calling the 1st method from the