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Create Your Own Transformer

Build custom transformers for validation, enrichment, or redaction.

The transformer interface​

Transformers are functions that receive a context object and return a transformer instance:

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The context contains:

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The returned instance must implement:

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Return values​

ReturnBehavior
eventContinue chain with modified event
voidContinue chain, event unchanged
falseStop chain, event dropped

Minimal example​

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Push context​

The push function receives an event and a push context:

  • config: Transformer configuration
  • env: Environment dependencies
  • logger: Scoped logger for output
  • id: Transformer identifier
  • collector: Access to collector instance
  • ingest: Request metadata from source (optional)
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Examples​

Enrich: add server-side data​

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Validate: custom check​

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Using your transformer​

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Testing​

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Next steps​

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