Summer Migration

Summer Migration is a simple library for doing database migrations. It includes facilities for upgrading using scripts and doing java based migrations.

It's design goals are:

• Minimalistic dependencies. Summer Migration don't clutter your classpath. And it doesn't depend on any logging framework.
• Configuration in code, not XML or Annotations.
• No resource discovery. Upgrades fail when needed resources aren't found, but the found resources does not determine how your migration turn out.
• Simple to extend with own migrations.

Example:

import static com.hencjo.summer.migration.dsl.DSL.*;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import org.postgresql.ds.PGSimpleDataSource;
import com.hencjo.summer.migration.Migrator;
import com.hencjo.summer.migration.dsl.MigrationsDescription;

public class Upgrader {
	public static MigrationsDescription upgradeDescription() {
		return migrations(
			migration("1.0-baseline").installsThrough(script("1.0-baseline.sql")),
			migration("1.1-base64-decode-some-field", V1_1_Migrations.base64decodeSomeField())
		);
	}

	public void upgrade(PGSimpleDataSource datasource) throws SQLException, IOException {
		Migrator migrator = new Migrator();
		try (Connection connection = datasource.getConnection()) {
			migrator.migrate(connection, upgradeDescription());
		}
	}
}

Include it in your pom like this:

<dependency>
    <groupId>com.hencjo.summer</groupId>
    <artifactId>summer-migration</artifactId>
    <version>1.2</version>
</dependency>