client: add support for iterating client metadata keys #12804
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axw
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Apr 7, 2025
Add support for discovering the client metadata keys. At the moment it is only possible to get the values for a known key. Closes open-telemetry#12804
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#### Description Add support for iterating over the client metadata keys. At the moment it is only possible to get the values for a known key, which makes it impossible to inspect metadata keys without prior knowledge of all possible keys, e.g. as described in open-telemetry/opentelemetry-collector-contrib#39157. #### Link to tracking issue Closes #12804 #### Testing Trivial addition, added unit tests. #### Documentation N/A
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Describe the issue you're reporting
The https://pkg.go.dev/go.opentelemetry.io/collector/client#Metadata type provides no means of iterating over the metadata keys -- you can only call
Getwith a known key. Being able to iterate the keys would be necessary to implement open-telemetry/opentelemetry-collector-contrib#39157, i.e. in order to obtainrequest.metadata, the full map of client metadata.I propose adding a
func (Metadata) Keys() iter.Seq[string]method that iterates over the metadata keys. See #12805.The text was updated successfully, but these errors were encountered: