orchestration-service-nestjs

To coordinate multi-service workflows in NestJS, use an OrchestrationService to bridge controllers and domain logic. This pattern coordinates multiple model services to execute end-to-end cross-domain operations while maintaining consistent behavior.

Transactional boundaries across NestJS model services are enforced using a dedicated internal Processor service. This Processor applies NestJS transaction patterns to ensure operations across services like Show and Task succeed or fail together atomically.

Handling bulk operations and cross-domain validation in a NestJS API is best managed by an orchestration layer. It coordinates the required model services and provides modular validation helpers to ensure data integrity before executing complex workflows.

To prevent race conditions during concurrent bulk operations in NestJS, apply advisory locks for concurrency control. Combined with a dedicated Processor, this pattern enforces idempotency and secures the transactional boundary against parallel conflicts.

You should not expose your domain Processor directly to NestJS controllers. The orchestration pattern exposes a public OrchestrationService for controllers to communicate with, keeping the internal Processor service private to protect transactional boundaries.

You need an orchestration service in NestJS when complex workflows span multiple model services across different domains. It is required for bulk operations, cross-domain validation, and transactional processing that demand idempotency and concurrency control.