ores.cpp.nats-sub-registrar
Table of Contents
This page is the node for the ores.cpp.nats-sub-registrar facet of the codegen
template library, part of the ores.cpp technical space. Each archetype
below is documented, and holds its mustache source, in its own
linked page — this page is the facet-level summary and the routing
table to them.
Summary
Two templates forming the per-entity NATS sub-registrar pair. The header
declares register_<entity>_handlers(); the implementation includes only
that entity's handler header and wires the entity's NATS subjects to the
handler instance. The top-level service registrar delegates to each
sub-registrar, so a compile failure in one entity's handler cannot block
registration of the rest. Consumed by the nats-sub-registrar profile.
The ores.cpp.nats-sub-registrar facet
Projects the entity model onto its messaging registration surface. It
consumes the same domain_entity / entity model the nats-handler
facet does, and is the wiring counterpart to that handler: the handler
defines the operations, this facet subscribes them to subjects.
Mustache incantations
The implementation template branches on two model flags lifted from the
entity's C++ ** Flags drawer:
no_history— skip the history subject subscription. Set on entities whose protocol/handler has no history operation.list_only— wire only the list subject. Set on read-only lookup entities.
Archetypes
| Archetype | Description |
|---|---|
| ores.cpp.nats-sub-registrar.nats_registrar_header | Per-entity sub-registrar header declaring register_<entity>_handlers(). nats-sub-registrar profile. |
| ores.cpp.nats-sub-registrar.nats_registrar_implementation | Per-entity sub-registrar implementation wiring NATS subjects to the handler. nats-sub-registrar profile. |
See also
- Entity-composed registrars — the architecture meta-pattern this facet is the NATS instance of.
- Codegen template library — the groups overview.
- ores.cpp.nats-handler — the handler this sub-registrar wires up.