Support for GRPC

[tusharmath]

Tailcall currently supports HTTP as it's only data-source. Being a generic GraphQL proxy, it should be able to load data over GRPC also.

The user experience should match that of @http as much as possible.

schema @grpc(host: "grpc.service.com", port: 8080) {
  query: Query
  mutation: Mutation
}

type Query {
  user(id: ID!): User @grpc(
    service: "UserService", 
    method: "GetUser", 
    request: {user_id: "{{args.id}}"}
  )
}

Technical Requirements

• All mustache templates should work like in Http.
• Batching via data-loader should be supported.

Additional Notes

• Actual details about the specification would be available - Doc: Create a specification for support GRPC #525

[algora-pbc]

💎 $350 bounty created by tailcallhq
🙋 If you'd like to work on this issue, comment below to get assigned
👉 To claim this bounty, submit a pull request that includes the text /claim #414 somewhere in its body
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[ologbonowiwi]

I found hyperium/tonic; likely, we can use it.

[deepakdinesh1123]

@tusharmath Is this issue still available for work?

[tusharmath]

@deepakdinesh1123 Yes, all tickets are available until closed ;)

[deepakdinesh1123]

@tusharmath I have added a specification for GRPC support in #530 please take a look at it

[thaodt]

/attempt #414

Options

• Cancel my attempt

[algora-pbc]

The bounty is up for grabs! Everyone is welcome to /attempt #414 🙌

[thaodt]

because I'm engaging with another issue, so no time for working on this one.
Anyone feel free to pick it, I will be here to help on guidance and code review if you want.

[ssddOnTop]

@tusharmath I think I am done with #441 (review pending) Can you assign this one to me

/attempt #414

[algora-pbc]

@ssddOnTop: The Tailcall Inc. team prefers to assign a single contributor to the issue rather than let anyone attempt it right away. We recommend waiting for a confirmation from a member before getting started.

[A-N-uraag]

@tusharmath throwing my 🎩 in since there was no activity since 4 days. Can I get assigned?

[tusharmath]

@ssddOnTop Are you working on this?

[ssddOnTop]

@ssddOnTop Are you working on this?

Yes

[ssddOnTop]

Still stuck on a few things, I'll make a PR in a few days

[ssddOnTop]

@tusharmath sorry I won't be able to do grpc integration

[AayushMohan]

Hey @tusharmath, can you please assign this to me?

[tusharmath]

This issue has been attempted multiple times before and never reached completion. I would recommend only folk who have a good understanding of the project and grpc in general to attempt it. @A-N-uraag @AayushMohan let me know if you feel confident about implementing this feature.
Alternatively working as a team with split bounty could also work.

[Rutik7066]

Hi @tusharmath i can. And would like to work on this issue.

[amitksingh1490]

@Rutik7066 Please Go ahead assigning this to you

[Rutik7066]

Thank you @amitksingh1490

[tusharmath]

We are removing bounty from this PR. It's going to be taken up internally for now. Thank you everyone for trying 🙏

[Rutik7066]

No problem @tusharmath. I have researched and started learning package call tonic for grpc. And was looking to complete the work by this weekend.

[Rutik7066]

Here is the doc https://docs.rs/tonic/latest/tonic/ it may help you.

[tusharmath]

Feel free to connect with @amitksingh1490 who has made a lot of progress in his PR.

[tusharmath]

fixed in #730