Aashish-Jha-11 opened a new pull request, #35876:
URL: https://github.com/apache/beam/pull/35876
Fixes #35873
## Summary
This PR implements a `Write` transform for the Go SDK's cross-language
Bigtable package (`xlang/bigtableio`), bringing it to feature parity with the
Bigtable I/O connectors in other Beam SDKs and providing a fully supported
mechanism for writing data to Google Cloud Bigtable from Go pipelines.
## Changes Made
- Implement `Write` function with cross-language support using Java
`BigtableIO.Write`
- Add `WriteOption` and `WriteExpansionAddr` for configuration
- Use `beam:schematransform:org.apache.beam:bigtable_write:v1` URN
- Follow same patterns as BigQuery xlang implementation
- Reuse existing expansion service infrastructure
- Update package documentation to include Write transform
- Brings Go SDK to feature parity with other Beam SDKs for Bigtable writes
## Problem Solved
Currently, Go developers who need to write to Bigtable are directed to use
the community-supported `go/pkg/beam/io/bigtableio` package, which has
limitations such as its internal use of `GroupByKey` on a global window that
can cause streaming pipelines to stall indefinitely.
This implementation provides a fully supported cross-language alternative
that leverages the robust Java `BigtableIO.Write` transform, offering the same
reliability and features available to Java developers.
## Testing
- Package builds successfully
- All imports resolve correctly
- Implementation follows established xlang patterns
- Consistent with existing BigQuery xlang implementation
## Usage Example
```go
import "github.com/apache/beam/sdks/v2/go/pkg/beam/io/xlang/bigtableio"
// Write rows to Bigtable
rows := beam.CreateList(s, []bigtableio.Row{sampleRow})
bigtableio.Write(s, "project-id", "instance-id", "table-id", rows)
// With custom expansion service
bigtableio.Write(s, "project-id", "instance-id", "table-id", rows,
bigtableio.WriteExpansionAddr("localhost:8080"))
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