createPartitionedIdempotencyKeyFactory

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Call Signature

createPartitionedIdempotencyKeyFactory(options): (context) => string

Defined in: packages/pipeline-idempotency/src/helpers/partitioned-key.ts:113

Creates an IdempotencyKeyFactory whose keys partition by tenant, principal and operation, and fail closed when any of them is missing.

Segments are escaped and joined with joinKeySegments from @cqrs-ddd/safe-stringify, so values containing the separator — email addresses, external subject claims, composite ids — cannot make two different operations collide on one key.

The key is an operation identity. Do not fold permissions into it: a key that changed with permissions would let the same side effect run again. Bind replay to the caller’s authorization with replayScopeFactory instead.

The produced key is [version:]<tenantId>:<principal…>:<action>:<operation>, with the tenant segment omitted when includeTenant is false.

Parameters

options

PartitionedIdempotencyKeyOptions & object

Returns

(context) => string

Throws

When the tenant or principal is absent, or the operation is absent and onMissingOperation is 'throw'.

Examples

Per authenticated principal, deduplicated by a business identifier

const createOrderKey = createPartitionedIdempotencyKeyFactory({
  version: 'v1',
  action: 'order.create',
  principal: (ctx) => ['user', ctx.items.get(CURRENT_USER_ID) as string],
  operation: (ctx) => (ctx.request as CreateOrderCommand).externalRef,
});

class CreateOrderHandler {
  @pipeline.wrap({ kind: 'command' }, [IdempotencyBehavior, { keyFactory: createOrderKey }])
  async handle(command: CreateOrderCommand) {}
}

Optional client-supplied Idempotency-Key

createPartitionedIdempotencyKeyFactory({
  principal: readUserId,
  operation: (ctx) => (ctx.request as PayCommand).idempotencyKey,
  onMissingOperation: 'skip',
});