Package com.babelqueue.idempotency

package com.babelqueue.idempotency

Optional idempotency helper (ADR-0022): dedupe a consume handler on meta.id.

Idempotent.wrap(com.babelqueue.idempotency.Store, com.babelqueue.idempotency.Handler) wraps a Handler so a message already processed is skipped; Store is the pluggable dedupe record, with InMemoryStore as the reference implementation. The wire envelope is unchanged (schema_version: 1) — this is a pure consumer-side concern. See .ssot/contracts/error-handling.md §1.

Related Packages

Package	Description
com.babelqueue	BabelQueue — Polyglot Queues, Simplified.
com.babelqueue.otel	Optional OpenTelemetry tracing for babelqueue (ADR-0025) — the Java mirror of the Go babelqueue-go/otel module.
com.babelqueue.schema	Optional per-URN data schema validation (ADR-0024): a dependency-free subset Draft-07 validator (PayloadValidator), a SchemaProvider (with the in-memory MapProvider), and the SchemaValidation producer/consumer helpers.

Class	Description
Handler	A consume handler: processes one decoded Envelope.
Idempotent	Wraps a Handler so a message whose meta.id was already processed successfully is skipped instead of run again (ADR-0022) — the Java mirror of the PHP Idempotent::wrap, Go idempotency.Wrap, Python wrap, and Node Wrap helpers.
InMemoryStore	Process-local, thread-safe Store backed by a concurrent set.
Store	A pluggable record of message ids that have already been processed, keyed on the envelope's meta.id.