SaFi Bank Space : Domains

Created by Ján Borovský, last modified on Nov 25, 2022

Overall domain decomposition and dependencies.

Each of the domains is composed of microservices. Each microservice:

has its own, dedicated database for entities it owns
exposes REST interface to other microservices
publishes & consumes Kafka messages for asynchronous communication

At the center of Products and Transactions domains there is a core banking solution TM Vault providing account ledgers and core product related business logic.

The positioning and responsibilities of TM Vault in the context of the overall solution architecture is described on a dedicated page.

Static View

Static view of all frontend applications, domain services, data stores, integration gateways, integrated systems and utility services.

Component view

Dependency View

Service dependencies and integration with external systems.

Note: current state of the dependencies available via a common’s tool Deploy checker able to produce Graphviz visualization.

Note: Integration patterns and communication protocols for each particular dependency are subject to the architecture decisions within each domain.

Model for Service Decomposition

High-level model aiming to identify domains (bounded contexts), its responsibilities and their inter-relationships. It does not prescribe how individual components are composed into the physical / runtime services or other artefacts.

Component	Description
Client	"WHO is making the request"
Manager	Responsible for the execution of business use cases, orchestration of activities "WHAT needs to be done"
Engine	Responsible for the execution of business logic, isolated from the process or sequence of activities "HOW to implement an activity"
Resource (Entity) Access	Responsible for the encapsulation of resource access (DB, API, file, external system, etc) Contract designed with operations defined in business terms (Repository) "HOW to get data, access and manipulate the resource"
Resource	Physical resources such as database, file system, message queue or an external system "WHERE the system state is"
Utility	Responsible for cross-cutting concerns not specific to business logic of the system

Model for Service Integrations / Dependencies

Example of asynchronous integration between two domains.

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