GC Enterprise Architecture/Framework/ApplicationGuide

GC Enterprise Architecture	GC Enterprise Architecture Review Board, GC EARB
GC Service & Digital Target Enterprise Architecture	When to come
Enterprise Architecture Framework	Forward Agenda
Business Capability Model (BCM)	Past Sessions
Exemplar and Reference Architectures	10 Things You Need to Know
Enterprise Solutions	Governance for Digital Solutions
Working Groups	EA and GC EARB Overview – Presentation
Other References

Application architecture

Application architecture is defined as the management of software used by a business to solve problems. Application architecture practices must evolve significantly for the successful implementation of the GC Enterprise Ecosystem Target Architecture. Transitioning from legacy systems based on monolithic architectures to architectures that are oriented towards business services and re‑useable components implementing business capabilities, is a major shift. Interoperability becomes a key element, and the number of stakeholders that must be considered increases.

Use open source solutions hosted in public cloud

• select existing solutions that can be reused over custom built

If there is already an existing open-source solution for another project that can be reused for your project, it is recommended to reach out to the owner of that project and try to reuse it for your project. That way you can get the expertise as well as the lessons learned for the existing solution.

   How to achieve:
    * Summarize how the architecture leverages and reuses existing architectural sections including:
       * Past and/or Present Processes
       * Past and/or Present Solutions
       * Past and/or Present Components

   Tools:
       * Target State Architecture
       * Interim State Architecture
       * EA Assessment 

• contribute all improvements back to the communities

   How to achieve:
    * Summarize how the team will align to the TBS Guidance on Open Source Publishing to support the production of better solutions
    * Summarize how the team will leverage/has leverage the Open Source community

   Tools:
       * Target State Architecture
       * Interim State Architecture

• register open source software to the Open Resource Exchange

   How to achieve:
    * Summarize how the architecture will leverage the Open Resource Exchange.
    * Summarize how the architecture will utilize APIs to support Open Data feeds

   Tools:
       * Target State Architecture
       * Interim State Architecture

Use software as a service (SaaS) hosted in public cloud

• choose SaaS that best fit for purpose based on alignment with SaaS capabilities

   How to achieve:
    * Summarize how the recommended SaaS is the best fit for purpose based on alignment with SaaS capabilities of SaaS provider and Dept/SSC

   Tools:
       * Option analysis

• choose a SaaS solution that is extendable

   How to achieve:
    * Summarize how the recommended SaaS is extendable

   Tools:
       * Option analysis
       * EA Assessment

• configure SaaS and if customization is necessary extend as open source modules

   How to achieve:
    * Summarize how the recommended SaaS can be customized through Open Source modules.

   Tools:
       * Option analysis
       * EA Assessment

Design for Interoperability

• design systems as highly modular and loosely coupled services

   How to achieve:
    * Summarize how the architecture supports the implementation through:
       * Simple independent functions
       * Highly modular
       * Loosely coupled
       * Deployed into a container that has just a single application with  the ability to build the smallest image 

   Tools:
       * Target State Architecture
       * Interim State Architecture

• expose services, including existing ones, through APIs

   How to achieve:
    * Summarize how the architecture exposes functionality as services and these services are accessible through common methodologies
    * Summarize how the architectures aligns to the Government of Canada Standards on APIs

   Tools:
       * Target State Architecture
       * Interim State Architecture

• make the APIs discoverable to the appropriate stakeholders

   How to achieve:
    * Summarize which APIs will be published to the ESDC API  store
    * Summarize which APIs will be published to the   GC API store 
    * Summarize the rational for not publishing APIs to an API store

   Tools:
       * Target State Architecture
       * Interim State Architecture

Design for Interoperability, Proposed amendment Jan 8, 2021

• design systems as highly modular and loosely coupled services

   How to achieve:
    * 

• make all services available through a well-defined interface, such as an application programming interface (API)

   How to achieve:
    * 

• all APIs with potential for cross-departmental, inter-jurisdictional, or public consumption must be published to the GC API Store

   How to achieve:
    * 

• use the Canadian Digital Exchange Platform (CDXP) for data exchange where suitable (e.g., GC Event Broker for asynchronous messaging)