Support custom Compression/Decompressino

[MRuecker]

Describe the feature

We are using the older (Netty) version of the gRPC Server and implemented custom Snappy compression/decompression. We extended the (De)Compressor registry and registered it in the GrpcServer builder via

• compressorRegistry
• decompressorRegistry

I couldn't find any option to register custom (de)compressors in grpc-netty

Use cases

This feature is usefull when you need to compress the payload and don't want to use gzip because it's very heavy on CPU. I our case we decided to use Snappy because is comes with a nice balance between CPU usage and compression ratio

Contribution

I'm happy to implement this feature and it might be enough to just allow a custom Compressor/Decompressor Registry to be added to the GrpcServiceBridge and use them instead of the default registries to find the compressor needed. But I'm not sure

Thanks you Markus

[liangyuanpeng]

I think it's useful, cc @vietj

[vietj]

@MRuecker currently compression is hardcoded in GrpcClientRequest and GrpcServerResponse and only works with GZIP, so you would like to register other compression algorithms ?

[MRuecker]

Yes we are currently using snappy because GZIP is too heavy on CPU

[franz1981]

what's the status of this @vietj @MRuecker ?

[vietj]

I think we should have support for any compression actually

[franz1981]

yeah, at least snappy is very used (and I'm recently working with @lucamolteni to get it decent for us as well) and PRs are welcome as you might know ihih, so , join the party!