ARender Web-UI - Spring Boot Configuration

Overview

ARender is built on Spring Boot and supports external library (connector) loading.

ARender Web-UI Spring Boot provides:

• Default internal configuration
• A dedicated integrator profile for controlled overrides
• Support for both externalized configuration and connector-embedded configuration

This approach ensures predictable configuration resolution while maintaining separation between platform defaults and customer-specific customization.

Default Configuration Model

The application ships with internal configuration files application.properties and/or application.yml.

These files define:

• Infrastructure configuration
• Default Spring Boot behavior
• Base system properties required for correct startup

Integrator Profile Strategy

To allow safe overrides, ARender activates and includes a dedicated Spring profile:

spring.profiles.include=integrator
spring.profiles.active=integrator

This enables support for application-integrator.properties and application-integrator.yml.

The integrator profile:

• Loads in addition to the base configuration
• Overrides only explicitly redefined properties
• Preserves internal defaults for all other settings

This prevents conflicts that may occur when multiple application.properties files exist on the classpath.

Supported Override Mechanisms

External Configuration

Standalone

Place the application-integrator.properties (or YAML variant) file next to the ARender JAR file:

arondor-arender-hmi-springboot-{VERSION}.jar
application-integrator.properties

or

arondor-arender-hmi-springboot-{VERSION}.jar
application-integrator.yml

Spring Boot will automatically detect and load the integrator profile configuration.

Docker

Place the application-integrator.properties (or YAML variant) file at /home/arender/ in the arender-ui-springboot container through volume.

Connector-Embedded Configuration (Fat JAR)

Include one of the following files inside the connector JAR:

application-integrator.properties

or

application-integrator.yml

Because the integrator profile is active, Spring will load this configuration in addition to the default one.

Configuration Precedence Model

Spring Boot applies configuration sources according to a defined precedence hierarchy.

Higher sources override lower ones.

Precedence Order (Lowest → Highest)

1. Internal application.yml (inside of ARender JAR)
2. Internal application.properties (inside of ARender JAR)
3. Internal application-integrator.yml (inside of the connector JAR)
4. Internal application-integrator.properties (inside of the connector JAR)
5. External application.yml (outside of ARender JAR)
6. External application.properties (outside of ARender JAR)
7. External application-integrator.yml (outside of ARender JAR)
8. External application-integrator.properties (outside of ARender JAR)
9. Environment variables
10. JVM system properties (-D)
11. Command-line arguments

Property Format Precedence

When both formats exist in the same location:

application.properties
application.yml

The .properties file takes precedence over .yml.

Example

application.yml

server:
  port: 8080

application.properties

server.port=9090

Effective value:

server.port=9090

Configuration Resolution Diagram

High-Level View

                +----------------------------+
                |  Command-line arguments    |
                +----------------------------+
                             ↑
                +----------------------------+
                | JVM -D system properties   |
                +----------------------------+
                             ↑
                +----------------------------+
                | Environment variables      |
                +----------------------------+
                             ↑
                +----------------------------+
                | External integrator config |
                +----------------------------+
                             ↑
                +----------------------------+
                | External base config       |
                +----------------------------+
                             ↑
                +----------------------------+
                | Internal integrator config |
                +----------------------------+
                             ↑
                +----------------------------+
                | Internal base config       |
                +----------------------------+

Higher blocks override lower blocks.

Summary

Use the integrator profile by creating application-integrator.properties or YAML variant in order to safely override configurations without interfering with core application stability.