Use Existing Java Methods

Use this path when a pipeline step can call a regular Java method directly and the method already uses the application contract types.

YAML Shape

steps:
  - name: enrich-payment
    operator: com.example.payments.PaymentEnricher::enrich
    input: Payment
    output: EnrichedPayment
    cardinality: ONE_TO_ONE

The operator reference keeps the boundary explicit. TPF can still validate the method shape and generated call path before deployment.

Use This When

• the method is synchronous from the pipeline point of view,
• the input and output types are already the pipeline contract types,
• no external mapper is required,
• the method does not own durable correlation or long-running wait state.

For low-level details, see Operator Delegation Reference.