Container Overview

This document provides an overview of the containers that make up Context1.
A container represents an independently deployable software unit within the system, such as web applications, APIs, databases, or message brokers.

Purpose

The purpose of this Container Overview is to:

• Define the key containers in this context.
• Explain their roles and interactions within the system.
• Provide a high-level architectural view before diving into individual container details.

Containers in Context1

The following containers are included in this context:

• Container 3: [Brief description of its function]
• Container 4: [Brief description of its function]
• … (Add more containers as needed)

Each container may have multiple components inside it, which will be detailed separately in their respective sections.

Example: Internet Banking System Containers

    C4Container
    title Container diagram for Internet Banking System

    System_Ext(email_system, "E-Mail System", "The internal Microsoft Exchange system", $tags="v1.0")
    Person(customer, Customer, "A customer of the bank, with personal bank accounts", $tags="v1.0")

    Container_Boundary(c1, "Internet Banking") {
        Container(spa, "Single-Page App", "JavaScript, Angular", "Provides all the Internet banking functionality to customers via their web browser")
        Container_Ext(mobile_app, "Mobile App", "C#, Xamarin", "Provides a limited subset of the Internet banking functionality to customers via their mobile device")
        Container(web_app, "Web Application", "Java, Spring MVC", "Delivers the static content and the Internet banking SPA")
        ContainerDb(database, "Database", "SQL Database", "Stores user registration information, hashed auth credentials, access logs, etc.")
        ContainerDb_Ext(backend_api, "API Application", "Java, Docker Container", "Provides Internet banking functionality via API")

    }

    System_Ext(banking_system, "Mainframe Banking System", "Stores all of the core banking information about customers, accounts, transactions, etc.")

    Rel(customer, web_app, "Uses", "HTTPS")
    UpdateRelStyle(customer, web_app, $offsetY="60", $offsetX="90")
    Rel(customer, spa, "Uses", "HTTPS")
    UpdateRelStyle(customer, spa, $offsetY="-40")
    Rel(customer, mobile_app, "Uses")
    UpdateRelStyle(customer, mobile_app, $offsetY="-30")

    Rel(web_app, spa, "Delivers")
    UpdateRelStyle(web_app, spa, $offsetX="130")
    Rel(spa, backend_api, "Uses", "async, JSON/HTTPS")
    Rel(mobile_app, backend_api, "Uses", "async, JSON/HTTPS")
    Rel_Back(database, backend_api, "Reads from and writes to", "sync, JDBC")

    Rel(email_system, customer, "Sends e-mails to")
    UpdateRelStyle(email_system, customer, $offsetX="-45")
    Rel(backend_api, email_system, "Sends e-mails using", "sync, SMTP")
    UpdateRelStyle(backend_api, email_system, $offsetY="-60")
    Rel(backend_api, banking_system, "Uses", "sync/async, XML/HTTPS")
    UpdateRelStyle(backend_api, banking_system, $offsetY="-50", $offsetX="-140")