向JHipster Cloud application.yml添加属性会导致注册表配置失败

Question

I want to add a custom property to the application.yml of my Cloud Config. The comments in the file say it is for all shared configuration. However, when I do so, it causes the binding of the properties to JHipsters own ApplicationProperties to fail at the class does not have the correct writable property.

application.yml

application:
    clients:
        - Foo

Stacktrace:

Caused by: org.springframework.boot.bind.RelaxedBindingNotWritablePropertyException: Failed to bind 'application.clients[0]' from 'file:central-config/localhost-config/application.yml' to 'clients[0]' property on 'io.github.jhipster.registry.config.ApplicationProperties'

Answer 1

From JHipster's documentation:

Application-specific properties Your generated application can also have its own Spring Boot properties. This is highly recommended, as it allows type-safe configuration of the application, as well as auto-completion and documentation within an IDE.

JHipster has generated a ApplicationProperties class in the config package, which is already preconfigured, and it is already documented at the bottom the application.yml, application-dev.yml and application-prod.yml files. All you need to do is code your own specific properties. (emphasis mine)

Have you done that step and added your own properties to ApplicationProperties.java ? It looks like you should have a property of type List<String> clients . If you haven't that's why it's failing, because it's attempting to bind a configuration property to the ApplicationProperties class, but the class doesn't contain a property to store it.

Answer 2

Custom Spring boot properties should always be defined in a @ConfigurationProperties class within the app so that their value can be setup in the yml file. This is thoroughly documented in the spring boot documentation:

https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html