Dapr support

[tanekim88]

Can protobuf-net be used for Dapr Grpc communication? An example would be greatly appreciated.

[mgravell]

I have absolutely no idea - can you point me at the relevant Dapr gRPC scenarios?

On Sat, 27 Mar 2021, 11:05 tanekim77, @.***> wrote:

Can protobuf-net be used for Dapr Grpc communication? An example would be greatly appreciated.

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[tanekim88]

Dapr seems to be the next big thing pushed by Microsoft for clouds and microservices, and it provides Dapr client library that recognizes Grpc serialization. But as far as I know, Protobuf-net uses different serialization, so is likely that the client library may not recognize the Grpc of protobuf-net. However, it would be great if Protobuf-net also provides Dapr client library that can talk through Protobuf-net serialization, like Protobuf-net.dapr

[mgravell]

gRPC usually (not always) uses protobuf, which protobuf-net is fine with; any links I can peruse here?

On Sat, 27 Mar 2021, 20:34 tanekim77, @.***> wrote:

Dapr seems to be the next big thing pushed by Microsoft for clouds and microservices, and it provides Dapr client library that recognizes Grpc serialization. But as far as I know, Protobuf-net uses different serialization, so is likely that the client library may not recognize the Grpc of protobuf-net. However, it would be great if Protobuf-net also provides Dapr client library that can talk through Protobuf-net serialization, like Protobuf-net.dapr

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[tanekim88]

The link is here: https://dev.to/thangchung/net-grpc-server-on-dapr-runtime-3ba6

I know that Dapr's client library recognizes grpc server in the link, but I am not sure if it will for Protobuf-net.grpc server.

[RemcoBlok]

Example here https://github.com/RemcoBlok/dapr-service-invocation-grpc-code-first using dapr service invocation with protobuf-net. Could not see how to use with AddCodeFirstGrpcClient<T>() but registering a singleton works:

builder.Services.AddSingleton(_ =>
{
    return DaprClient.CreateInvocationInvoker("greeter-service").CreateGrpcService<IGreeterService>();
});

The DaprClient.CreateInvocationInvoker method says that the returned CallInvoker may be registered as singleton, but not sure if the same can be said for the IGreeterService instance.

[mgravell]

if the IGreeterService instance is a client, then it won't matter hugely, but: singleton should be fine if the invoker can be singleton (the client instance is just a thin veneer over the invoker)

[SanYiKou]

I have adopted @RemcoBlok's method for my project, and it works well for my self-defined services. However, the other gRPC services of Dapr are experiencing exceptions.

2023-06-20 16:23:34 [08:23:34 INF] Request starting HTTP/2 POST http://127.0.0.1:80/dapr.proto.runtime.v1.AppCallback/ListTopicSubscriptions application/grpc -
2023-06-20 16:23:34 [08:23:34 INF] Executing endpoint 'gRPC - Unimplemented service'
2023-06-20 16:23:34 [08:23:34 INF] Service 'dapr.proto.runtime.v1.AppCallback' is unimplemented.
2023-06-20 16:23:34 [08:23:34 INF] Executed endpoint 'gRPC - Unimplemented service'

The Dapr sidecar is throwing some exceptions. (I have configured the Pub/Sub building block on Dapr)

2023-06-20 16:23:34 time="2023-06-20T08:23:34.062920652Z" level=error msg="error getting topic list from app: rpc error: code = Unimplemented desc = Service is unimplemented." app_id=my-service-api instance=b2a6f7242482 scope=dapr.runtime type=log ver=1.8.3
2023-06-20 16:23:34 time="2023-06-20T08:23:34.062981123Z" level=error msg="error occurred while beginning pubsub my-pubsub: rpc error: code = Unimplemented desc = Service is unimplemented." app_id=my-service-api instance=b2a6f7242482 scope=dapr.runtime type=log ver=1.8.3

[SanYiKou]

I found that the reason is related to the dapr dotnet-sdk, and I need to manually implement the AppCallback service from dapr's .proto file. relate issues: https://github.com/dapr/dotnet-sdk/issues/493

[zhoudi94]

I found that the reason is related to the dapr dotnet-sdk, and I need to manually implement the AppCallback service from dapr's .proto file. relate issues: dapr/dotnet-sdk#493

Hi , How to implement AppCallback manually?
protobuf-net and dapr Do you think they work well together? Any other questions?

[mgravell]

I have basically zero knowledge on Dapr; "I don't know". If there's specific things we can do in protobuf-net[.Grpc] : fine, but I simply don't have the capacity to do all the digging to find out what would be needed.