Day 3: Design decisions, project architecture and inter-process communication


Virtual Assistant, Web Design and bookkeeping services

Design decisions and inter-process communication

In our architectural blueprint, we’ve meticulously crafted design decisions to optimise security, efficiency, and scalability. At the core of our system lies the API gateway, serving as the primary conduit for all communication, thereby fortifying our infrastructure against potential vulnerabilities.

Client interactions are rigorously channeled through the API gateway, ensuring a centralised and secure point of entry. Employing synchronous HTTP requests and responses guarantees seamless connectivity while upholding stringent security protocols. Furthermore, to cater to real-time communication needs, we’ve integrated the robust Socket.IO framework, enabling instantaneous data exchange.

Inter-process communication between microservices operates on an event-driven paradigm, leveraging RabbitMQ for streamlined message transmission. This asynchronous approach fosters agility and decoupling, facilitating scalable growth without compromising system integrity. Each microservice is endowed with its dedicated data repository, adhering to the database-per-service paradigm. This architectural pattern enhances autonomy and scalability while mitigating the risk of data coupling inherent in monolithic architectures.

In our token authentication strategy, JSON Web Tokens (JWT) play a pivotal role. The API gateway assumes full responsibility for token generation and management, shielding individual microservices from this intricate process. Authentication tokens are meticulously managed within the gateway’s secure ecosystem, ensuring stringent access controls and safeguarding sensitive data.

To bolster security measures, microservices are shielded from external access, with the API gateway serving as the sole intermediary. Each incoming request to the gateway is accompanied by a specialised token, distinct from standard authentication tokens, fortifying our defense against unauthorised access attempts.

Error handling is orchestrated with precision, with client errors seamlessly routed to the API gateway for resolution, while systemic errors are meticulously logged and monitored via our robust monitoring infrastructure.

Project architecture

Our client ecosystem comprises mobile and web applications, seamlessly interfacing with the API gateway for synchronous transactions, while harnessing the power of Socket.IO for asynchronous event dissemination, ensuring an immersive and responsive user experience.

ElasticSearch emerges as a cornerstone for data indexing and retrieval, augmenting our search capabilities with unparalleled efficiency. Leveraging the storage prowess of ElasticSearch and the visualisation capabilities of Kibana, we empower efficient log management and application monitoring, culminating in enhanced operational insights.

Centralising event transmission, a singular instance of RabbitMQ serves as the nexus, fostering seamless communication across all services. Adhering to the database-per-service paradigm, each microservice is endowed with its dedicated data repository, amplifying autonomy and scalability.

Our meticulously crafted architecture ensures seamless integration of disparate services, fortified by RabbitMQ’s robust event-driven communication model. The notification service emerges as a pivotal orchestrator, aggregating events from disparate sources while maintaining a unidirectional flow of communication.

In summary, our architectural framework embodies resilience, security, and scalability, underpinned by meticulous design decisions and judicious technology selection, ensuring a robust foundation for future growth and innovation.

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