Heroku. Java. Unable to find resource. My deployed app can't find file in resource folder

Question

config file:

// import org.apache.velocity.app.VelocityEngine;
@Bean
public VelocityEngine velocityEngine() {
    final VelocityEngine velocityEngine = new VelocityEngine();

    velocityEngine.setProperty("resource.loader", "class");
    velocityEngine.setProperty("class.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");

    return velocityEngine;
}

locally everything is fine but when I deploy my app to Heroku I catch that exception:

velocityEngine.getTemplate("./templates/template_1.html");

Exception:

ResourceNotFoundException
Unable to find resource './templates/template_1.html'

Answer 1

You need to use velocityEngine.getTemplate("templates/template_1.html") , as an absolute/file system based path like ./templates/template_1.html wouldn't exist after the application has been packaged into a jar file or docker image. You can find the sample app in github