Java Standalone App中的Spring-boot application.yaml

Question

I was wondering if is there a way to use a file like spring-boot application.yaml from a Java Standalone App, I am searching for similar approach to pun on it environment properties (for example endpoints URLs dev, qa, production)

I'm using gradle as build tool

Answer 1

I've solved it by myself :) The solution was creating my own task on gradle. Here the steps that I follow:

1. Inside src/main/resources I created as many files as I need:

   • config-dev.yaml
   • config-qa.yaml
   • config-prod.yaml

2. I added a Gradle tasks to choose the corresponding file:

    task loadConfigFile(type: Copy) { def environments = ['dev', 'preprod', 'prod'] def environment = 'dev'; if (project.hasProperty('env')) { def validParam = environments.contains(env) if (validParam) { environment = env } } def configFile = "configuration-${environment}.yaml" from('src/main/resources/') into('src/main/resources/') include(configFile) rename(configFile, 'application.yaml') 

   }

3. Before to build the project I called the function using doFirst:

    build.doFirst { loadConfigFile() } 

4. For finish I should call the build task using a custom variable named env:

    ../gradlew build -Penv=preproda 

As a result in the src/main/resources I have a configuration file named application.yaml and using snakeyaml I read the config entries, here is demo about the use of snakeyaml http://enriquezrene.com/home/index.php/en/groovy-english/groovy-for-java-developers/57-reading-yaml-files-from-groovy