DbConfig.java

/**
 * the db spring configuration to use in production , to be replaced with actual production configuration , that is for local run only
 */
@Configuration
@EnableTransactionManagement
public class DbConfig {
	private static final List<String> DEFAULT_ADDITIONAL_INIT_DB_PARAMS = Arrays
			.asList("--nosync", "--locale=en_US.UTF-8");

	/**
	 * @param config the PostgresConfig configuration which will be used to get the needed host, port..
	 * @return the created DB datasource
	 */
	@Bean
	@DependsOn("postgresProcess")
	public DataSource dataSource(PostgresConfig config) {

		DriverManagerDataSource ds = new DriverManagerDataSource();
		ds.setDriverClassName("org.postgresql.Driver");
		ds.setUrl(format("jdbc:postgresql://%s:%s/%s", config.net().host(), config.net().port(), config.storage().dbName()));
		ds.setUsername(config.credentials().username());
		ds.setPassword(config.credentials().password());
		return ds;
	}

	/**
	 * @return PostgresConfig that contains embedded db configuration like user name , password
	 * @throws IOException
	 */
	@Bean
	public PostgresConfig postgresConfig() throws IOException {
		// make it readable from configuration source file or system , it is hard coded here for explanation purpose only
		final PostgresConfig postgresConfig = new PostgresConfig(Version.V9_6_8,
				new AbstractPostgresConfig.Net("localhost", Network.getFreeServerPort()),
				new AbstractPostgresConfig.Storage("test"),
				new AbstractPostgresConfig.Timeout(),
				new AbstractPostgresConfig.Credentials("user", "pass")
		);

		postgresConfig.getAdditionalInitDbParams().addAll(DEFAULT_ADDITIONAL_INIT_DB_PARAMS);

		return postgresConfig;
	}

	/**
	 * @param config the PostgresConfig configuration to use to start Postgres db process
	 * @return PostgresProcess , the started db process
	 * @throws IOException
	 */
	@Bean(destroyMethod = "stop")
	public PostgresProcess postgresProcess(PostgresConfig config) throws IOException {
		PostgresStarter<PostgresExecutable, PostgresProcess> runtime = PostgresStarter.getDefaultInstance();
		PostgresExecutable exec = runtime.prepare(config);
		PostgresProcess process = exec.start();
		return process;
	}
}