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https://issues.apache.org/jira/browse/AVRO-2187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16506406#comment-16506406
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Doug Cutting commented on AVRO-2187:
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There's already some streaming support. Messages can be declared one-way and
Java supports an asynchronous calling API. I think this mostly supports what
you're calling client streaming. Server & bi-directional streaming can be done
with two protocols, one client->server and a second server->client (e.g., e.g.,
[https://github.com/apache/avro/tree/master/share/schemas/org/apache/avro/mapred/tether]).
How do you specifically propose we improve this? What additional keywords
should be added? Can this be done back-compatibly?
Thanks!
> Add RPC Streaming constructs/keywords to Avro IDL or schema
> -----------------------------------------------------------
>
> Key: AVRO-2187
> URL: https://issues.apache.org/jira/browse/AVRO-2187
> Project: Avro
> Issue Type: New Feature
> Reporter: Srujan Narkedamalli
> Priority: Major
>
> Motivation:
> We recently added support for transporting Avro serialization and IDL over
> gRPC for Java. In order to use the streaming features of gRPC or any other
> transport that supports streaming we need to be able to specify them IDL and
> schema.
> Details:
> Currently, gRPC supports 3 types of streaming calls:
> # server streaming (server can send multiple responses for a single request)
> # client streaming (client can multiple requests and server sends a single
> response)
> # bi-directional streaming call (on going rpc with multiple requests and
> responses)
> We would want a way to represent these types on calls in Avro's IDL similar
> to one-way calls using a keywords. Usually in gRPC with other IDLs a
> streaming request or response is repeated payload of same type. For client
> streaming and bi-directional streaming it would be simpler to have a single
> request argument when representing their type in callbacks.
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