How to read my META-INF/MANIFEST.MF file in a Spring Boot app?

Question

I'm trying to read my META-INF/MANIFEST.MF file from my Spring Boot web app (contained in a jar file).

I'm trying the following code:

        InputStream is = getClass().getResourceAsStream("/META-INF/MANIFEST.MF");

        Properties prop = new Properties();
        prop.load( is );

But apparently there is something behind the scenes in Spring Boot that a different manifest.mf is loaded (and not my own located in META-INF folder).

Does anyone know how I can read my manifest app in my Spring Boot app?

UPDATE: After some research I noticed that using the usual way to read a manifest.mf file, in a Spring Boot application this is the Jar that is being accessed

org.springframework.boot.loader.jar.JarFile

Answer 1

I use java.lang.Package to read the Implementation-Version attribute in spring boot from the manifest.

String version = Application.class.getPackage().getImplementationVersion();

The Implementation-Version attribute should be configured in build.gradle

jar {
    baseName = "my-app"
    version =  "0.0.1"
    manifest {
        attributes("Implementation-Version": version)
    }
}