Re: [grpc-io] Compose or nest a service in another service?

[Thomas Sörensen]

Ok thank you for the good feedback. I have application and I want to 
implement some components in a more suitable language and grpc seems to be 
a good choice to connect those components.

/Thomas

Den lördag 27 januari 2018 kl. 16:15:14 UTC+1 skrev Josh Humphries:
>
> The question could be asked about either protobuf or gRPC with different 
> answers.
>
> The protobuf IDL that does *not* allow combining/composing services this 
> way. A single service can only enumerate methods. You cannot nest services 
> inside others.
>
> However, gRPC does support such composition -- in a way -- by letting you 
> expose multiple services from a single server. In fact, you could have a 
> single server object that implements all of the protobuf service 
> interfaces. So you are effectively using an implementation language (not 
> protobuf) to compose the services, and then exposing all of the interfaces 
> from a single gRPC server.
>
>
> 
> *Josh Humphries*
> jh...@bluegosling.com 
>
> On Sat, Jan 27, 2018 at 3:22 AM, Thomas Sörensen  > wrote:
>
>> Not sure if this is gRPC question or a protocol buffer questions but I 
>> try here.
>>
>> I know that you can compose or nest messages in other messages and import 
>> messages from other .proto files and I wonder if it is possible to do the 
>> same for the service definition? If it is not possible now is it something 
>> that is planned to support in the future?
>>
>> I read that is possible in Apache Thrift so perhaps you have had any 
>> discussions on about supporting that?
>>
>> Best regards
>> Thomas
>>
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>
>

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Re: [grpc-io] Compose or nest a service in another service?

[Josh Humphries]

The question could be asked about either protobuf or gRPC with different
answers.

The protobuf IDL that does *not* allow combining/composing services this
way. A single service can only enumerate methods. You cannot nest services
inside others.

However, gRPC does support such composition -- in a way -- by letting you
expose multiple services from a single server. In fact, you could have a
single server object that implements all of the protobuf service
interfaces. So you are effectively using an implementation language (not
protobuf) to compose the services, and then exposing all of the interfaces
from a single gRPC server.



*Josh Humphries*
jh...@bluegosling.com

On Sat, Jan 27, 2018 at 3:22 AM, Thomas Sörensen 
wrote:

> Not sure if this is gRPC question or a protocol buffer questions but I try
> here.
>
> I know that you can compose or nest messages in other messages and import
> messages from other .proto files and I wonder if it is possible to do the
> same for the service definition? If it is not possible now is it something
> that is planned to support in the future?
>
> I read that is possible in Apache Thrift so perhaps you have had any
> discussions on about supporting that?
>
> Best regards
> Thomas
>
> --
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> To view this discussion on the web visit https://groups.google.com/d/
> msgid/grpc-io/035d13e9-5b99-470f-87e2-2c67725d64ec%40googlegroups.com
> 
> .
> For more options, visit https://groups.google.com/d/optout.
>

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