Invoerevent

Invoerevent is a term used in event-driven architectures to describe an event that signals the initiation of a function, service, or operation. It differs from a completion or result event by focusing on the act of invocation rather than the outcome. Invoerevents are used to decouple the trigger from the execution environment, enabling downstream routing, auditing, and asynchronous processing across distributed systems.

A typical invoerevent carries metadata about the invocation, such as the function or operation name, invocationId, payload reference or payload itself, timestamp, caller identity, correlationId, and trace context. It may also include flags indicating whether processing is intended to be synchronous or asynchronous, expected timeouts, and security or authorization details. Invoerevents are often published to an event bus, message queue, or CloudEvents-compatible transport to be consumed by downstream workers, services, or workflow engines.

Design and implementation considerations include ensuring idempotency and reliable delivery, handling retries and out-of-order arrivals, and establishing clear versioning and schema evolution. Security, privacy, and access control are important, as is observability through tracing, logging, and metrics. When integrating invoerevents with other patterns, it is common to distinguish invocation events from result or error events and to align with overall fault tolerance strategies and data governance policies. Examples of use cases include API gateways emitting invoerevents to initiate serverless functions, workflow orchestration, or batch processing pipelines where downstream components react to the invocation trigger.