http://www.dropwizard.io/1.3.16/dropwizard-migrations: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.migrations;

import io.dropwizard.Bundle;
import io.dropwizard.Configuration;
import io.dropwizard.db.DatabaseConfiguration;
import io.dropwizard.setup.Bootstrap;
import io.dropwizard.setup.Environment;

public abstract class MigrationsBundle<T extends Configuration> implements Bundle, DatabaseConfiguration<T> {
    private static final String DEFAULT_NAME = "db";
    private static final String DEFAULT_MIGRATIONS_FILE = "migrations.xml";

    @Override
    @SuppressWarnings("unchecked")
    public final void initialize(Bootstrap<?> bootstrap) {
        final Class<T> klass = (Class<T>) bootstrap.getApplication().getConfigurationClass();
        bootstrap.addCommand(new DbCommand<>(name(), this, klass, getMigrationsFileName()));
    }

    public String getMigrationsFileName() {
        return DEFAULT_MIGRATIONS_FILE;
    }

    public String name() {
        return DEFAULT_NAME;
    }

    @Override
    public final void run(Environment environment) {
        // nothing doing
    }
}