How to create a database during spring context initialization - mysql

Question

I need to create a database named test in my local mysql server which i will use to setup my datasource bean. I am using the following spring configuration for setting up the datasource and jdbctemplate for my testing
#Configuration
class Config {
#Bean(initMethod = "setupDatabase")
public DataSource getDataSource() {
String url = "jdbc:mysql://localhost:3306/test";
DriverManagerDataSource dataSource = new DriverManagerDataSource(
url, settings.getUsername(), settings.getPassword());
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
return dataSource;
}
#Bean
public JdbcTemplate getJdbcTemplate() {
JdbcTemplate jdbcTemplate = new JdbcTemplate();
jdbcTemplate.setDataSource(((DataSourceTransactionManager)transactionManager()).getDataSource());
return jdbcTemplate;
}
#Bean
public PlatformTransactionManager transactionManager() {
return new DataSourceTransactionManager(getDataSource());
}
#Bean
public DataSourceInitializer dataSourceInitializer(final DataSource dataSource) {
final DataSourceInitializer initializer = new DataSourceInitializer();
initializer.setDataSource(dataSource);
initializer.setDatabasePopulator(databasePopulator());
return initializer;
}
private DatabasePopulator databasePopulator() {
final ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
populator.addScript(schemaScript);
return populator;
}
#PostConstruct
public void setupDatabase() {
String url = "jdbc:mysql://localhost:3306";
try {
Connection connection = DriverManager.getConnection(url, settings.getUsername(), settings.getPassword());
Statement statement = connection.createStatement();
statement.execute("create database test");
} catch (SQLException exception) {
LOGGER.error("Could not setup database for test", exception);
throw new RuntimeException(exception);
}
}
}
I am getting the following error Caused by:
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'test'
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
at org.springframework.jdbc.datasource.init.DatabasePopulatorUtils.execute(DatabasePopulatorUtils.java:46)
Can someone explain what is going wrong with this configuration?

Answer 1

Did you create the test database at your local mysql? You need to create the db first to connect from your application. If you want to create a database by executing sql query connect to the database as root user and create the db.

Answer 2

The source of the exception: your setupDatabase() method is executed actually by Spring AFTER getDataSource() cause #Bean(initMethod = "setupDatabase") forces Spring to execute initMetod AFTER a bean creation for the bean initialization. But it's not you expect here.
You need somehow define your getDataSource() is depended on setupDatabase(). E.g. with a help of #DependsOn annotation.
Also see Spring 3 bean instantiation sequence
P.S. but why you don't simple manually add setupDatabase() call into getDataSource() method?