[.NET] Add Databricks Zerobus Ingest SDK for .NET#532
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Initial implementation of the .NET SDK wrapping the Rust C FFI (rust/ffi/) via P/Invoke. - JSON, Protocol Buffers, and Arrow Flight ingestion streams - Fluent StreamBuilder API with typed sub-builders - Thread-safe streams with ReaderWriterLockSlim - IAsyncDisposable support (.NET 8+) - HeadersProviderBridge for custom authentication callbacks - ProtoSchema for Unity Catalog schema generation - Integration tests with real gRPC mock server (zerobus_service.proto) - 51 tests: 30 unit + 21 integration (4 self-test, 4 smoke, 17 end-to-end) - CI/CD workflows integrated into push.yml and release-dotnet.yml - Cross-platform NuGet package (win-x64, linux-x64, linux-arm64, osx-x64, osx-arm64) Signed-off-by: Efrain Robles Gonzalez <efrain.robles@serviciosexternos.com.mx>
Set RecordType in native options struct (1=Proto, 2=Json) so stream creation stops rejecting JSON/Proto streams with 'Record type is not specified'. Also rework integration tests to avoid IAsyncLifetime, which triggers a .NET 8.0.28 JIT bug causing InvalidProgramException when combined with DllImport. Signed-off-by: Efrain Robles Gonzalez <efrain.robles@serviciosexternos.com.mx>
Three discrepancies found by comparing C# hardcoded defaults against zerobus_get_default_config() / zerobus_arrow_get_default_config(): 1. CallbackMaxWaitTimeMs was null (wait forever), native default is 5000ms 2. MaxInflightBatches was 10000, native default is 1000 3. Arrow StreamPausedMaxWaitTimeMs was ulong (0), native expects int64_t with -1 meaning 'wait full server duration' Also adds Defaults_MatchNativeConfig and ArrowDefaults_MatchNativeConfig smoke tests to detect future drift. Signed-off-by: Efrain Robles Gonzalez <efrain.robles@serviciosexternos.com.mx>
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What changes are proposed in this pull request?
WHAT: Adds the .NET SDK (
dotnet/) as a new wrapper language for the Zerobus Ingest SDK, alongside the existing Rust, Java, Python, Go, TypeScript, and C++ SDKs.The SDK wraps the Rust C FFI (
rust/ffi/) via P/Invoke with the following major components:Native/): P/Invoke declarations for all FFI functions, C struct marshaling,SafeHandlesubclasses, cross-platform native library resolverZerobusSdk,StreamBuilder): Fluent builder API with typed sub-builders for JSON, Protobuf, and Arrow Flight streamsZerobusJsonStream,ZerobusProtoStream<T>,ZerobusArrowStream(Beta), all thread-safe withReaderWriterLockSlimStreamConfigurationOptionsandArrowStreamConfigurationOptionswith builder patterns matching the Java SDKpush.yml,release-dotnet.ymlfor NuGet publishingCLAUDE.md,README.md,CONTRIBUTING.md,CHANGELOG.mdWHY: .NET developers lacked a native SDK for high-throughput streaming ingestion into Databricks Delta tables. The C FFI (
rust/ffi/) already supported C# as a target consumer. This implementation mirrors the Java SDK's API design while following .NET idioms (IDisposable,Task<T>,SafeHandle, delegates).How is this tested?
builder_new/free,get_default_config,builder_buildwithout crashdotnet build && dotnet testpasses on Windows (51/51 passing)