Reference

Glossary

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Algorithm

A class that performs one kind of calculation in a generic, framework-independent way. In EICrecon, algorithms inherit from algorithms::Algorithm<Input<...>, Output<...>> and live under src/algorithms.

Factory

A class that attaches an algorithm to the JANA2 framework, handling inputs, outputs, parameters, services, and initialization. New factories use JOmniFactory and live under src/factories.

JANA2

The event-processing framework used by EICrecon. It manages parallel event processing, factories, plugins, and services.

JOmniFactory

The modern JANA2 factory base class used for all new EICrecon factories. It declares its inputs, outputs, parameters, and services as registered members and uses the Curiously Recurring Template Pattern.

Factory generator

A JOmniFactoryGeneratorT object that acts as a recipe JANA2 uses to instantiate factories, assigning each instance a unique prefix and its input/output collection names.

Plugin

A JANA2 mechanism controlling which parts of EICrecon are compiled and linked. Each detector and benchmark corresponds to a plugin that registers its factory generators in an InitPlugin() method.

PODIO

A toolkit that generates data-model classes from a YAML specification. The EIC data model edm4eic (built on edm4hep) is implemented with PODIO.

Subset collection

A PODIO collection that refers to objects owned by another collection without owning them itself, created with setSubsetCollection().

Config struct

A plain-old-data struct holding an algorithm’s or factory’s parameters, exposed to a factory via config() and to an algorithm via the WithPodConfig mixin’s m_cfg member.