FEO Component Architecture		status: draft security: NO safety: ASIL_B
tags: component_feo realizes: PROCESS_wp__component_arch
doc__component_feo_architecture		Generic Document

FEO Component Architecture

Overview

The current implementation of the feature “FEO” (Fixed Execution Order Framework) consists of a main component (called “FEO” component) and a set of auxiliary components that will be either replaced by or turned into wrappers to components from other S-CORE features. In the latter case, these wrappers will possibly become sub-components of the main component.

This document describes the architecture of the main component “FEO”.

Description

Sub-Components

The main component “FEO” consists of the following sub-components:

• feo: Implements activities, threads, agents, and scheduling

• feo-cpp-build: C++ and Rust Code simplifying the integration of C++ components

• feo-cpp-macros: Rust proc-macros simplifying the integration of C++ components.

Rust requires proc-macros to reside in their own crate, therefore the latter two sub-components cannot easily be combined into a single one.

Rationale Behind Architecture Decomposition

The main component “FEO” has been split into three sub-components mainly according to usability considerations and Rust compiler constraints. (Rust proc-macros must reside in their own crate.)

Static Architecture

Static Architecture		status: valid security: YES safety: ASIL_B
tags: component_feo fulfils: comp_req__feo__application, comp_req__feo__scheduler, comp_req__feo__task_chain, comp_req__feo__agent, comp_req__feo__comp_cfg, comp_req__feo__act_map_cfg includes: real_arc_int__feo__primary, real_arc_int__feo__primary_config, real_arc_int__feo__secondary, real_arc_int__feo__secondary_config, real_arc_int__feo__activity
comp_arc_sta__feo__main		Component & Component Package Diagram

Dynamic Architecture

Dynamic Architecture		status: valid security: YES safety: ASIL_B
tags: component_feo fulfils: comp_req__feo__application, comp_req__feo__application_lifecycle, comp_req__feo__scheduler, comp_req__feo__task_chain, comp_req__feo__agent, comp_req__feo__activity_init, comp_req__feo__activitiy_step, comp_req__feo__activity_shutdown
The actual dynamic call sequence during the execution of a FEO application depends on the distribution of activities to processes as well as on the activity dependency graph defining the task chain. As an example, we consider the simple task chain and process distribution depicted in the following diagram For this task chain, a possible call sequence is shown below.
comp_arc_dyn__feo__main		Component Sequence Diagram

Interfaces

feo::agent::PrimaryConfig		status: valid security: YES safety: ASIL_B
tags: component_feo language: rust fulfils: comp_req__feo__application, comp_req__feo__task_chain, comp_req__feo__comp_cfg, comp_req__feo__act_map_cfg included by: comp_arc_sta__feo__main
See static architecture.
real_arc_int__feo__primary_config		Interface & Component Interface

feo::agent::Primary		status: valid security: YES safety: ASIL_B
tags: component_feo language: rust fulfils: comp_req__feo__application, comp_req__feo__task_chain, comp_req__feo__comp_cfg, comp_req__feo__act_map_cfg included by: comp_arc_sta__feo__main
See static architecture.
real_arc_int__feo__primary		Interface & Component Interface

feo::agent::SecondaryConfig		status: valid security: YES safety: ASIL_B
tags: component_feo language: rust fulfils: comp_req__feo__application, comp_req__feo__task_chain, comp_req__feo__comp_cfg, comp_req__feo__act_map_cfg included by: comp_arc_sta__feo__main
See static architecture.
real_arc_int__feo__secondary_config		Interface & Component Interface

feo::agent::Secondary		status: valid security: YES safety: ASIL_B
tags: component_feo language: rust fulfils: comp_req__feo__application, comp_req__feo__task_chain, comp_req__feo__comp_cfg, comp_req__feo__act_map_cfg included by: comp_arc_sta__feo__main
See static architecture.
real_arc_int__feo__secondary		Interface & Component Interface

feo::activity::Activity		status: valid security: YES safety: ASIL_B
tags: component_feo language: rust fulfils: comp_req__feo__activity included by: comp_arc_sta__feo__main
See static architecture.
real_arc_int__feo__activity		Interface & Component Interface