RunExample.java

@Override
public void run(MyConfiguration configuration, Environment environment)
{
  // Enable CORS headers
  final FilterRegistration.Dynamic cors = environment.servlets().addFilter("CORS", CrossOriginFilter.class);

  // Configure CORS parameters
  cors.setInitParameter("allowedOrigins", configuration.getAllowedOrigin());
  cors.setInitParameter("allowedHeaders", "X-Requested-With,Content-Type,Accept,Origin");
  cors.setInitParameter("allowedMethods", "OPTIONS,GET,PUT,POST,DELETE,HEAD");
}