Better localized error messages

[samrocketman]

Best to use MessageFormat and ResourceBundle. It helps with error messages and localization.

https://www.javaworld.com/article/2075897/testing-debugging/exceptional-practices--part-3.html

[samrocketman]

Allow customizing exceptions with a custom ResourcdBundle.

public SomeException(String message) {
    //get ResourceBundle from jar resources as a default
    SomeException(ResourceBundle bundle, String message)
}

SomeException(ResourceBundle bundle, String message) could be called directly to provide error customization in end user job dsl and pipeline scripts.

[samrocketman]

Simple example

https://github.com/jenkinsci/jira-plugin/blob/4e6793fa8a70f746dea03827dc2fdf19dbbd69d3/src/test/java/JiraConfig.java#L5

https://github.com/jenkinsci/jira-plugin/tree/4e6793fa8a70f746dea03827dc2fdf19dbbd69d3/src/test/resources

Search jenkinsci org for ResourceBundle to see additional examples.