Function toolboxObjectLookupTopic

pj_datastore/src/plugin_data_host.cpp:1745–1758

PJ_object_bytes_handle_t is a heap-allocated sdk::PayloadView: its anchor keeps the buffer alive until the plugin calls release_bytes. No wrapper struct needed — PayloadView already carries the Span + anchor.

// keeps the buffer alive until the plugin calls release_bytes. No wrapper
// struct needed — PayloadView already carries the Span + anchor.
PJ_object_topic_handle_t toolboxObjectLookupTopic(void* ctx, PJ_string_view_t topic_name) noexcept {
  auto* impl = static_cast<DatastoreToolboxObjectReadHostState*>(ctx);
  try {
    const auto needle = toStringView(topic_name);
    for (const auto id : impl->store.listTopics()) {
      if (impl->store.descriptor(id).topic_name == needle) {
        return PJ_object_topic_handle_t{id.id};
      }
    }
  } catch (...) {
    // Fall through to invalid handle.
  }
  return PJ_object_topic_handle_t{0};
}

bool toolboxObjectListTopics(
    void* ctx, PJ_object_topic_handle_t* out_buffer, uint64_t buffer_capacity, uint64_t* out_count,