Question

I am attempting to do unit testing of my DAO (using Spring and Hibernate). I am using HSQLDB per this tutorial. The tutorial states that the in-memory HSQLDB database can be initialized using a SQL script but I cannot find information on how to do so in Spring. Here is the pertinent Spring context config:

 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="org.hsqldb.jdbcDriver" />
    <property name="url" value="jdbc:hsqldb:mem:mydb" />
    <property name="username" value="sa" />
    <property name="password" value="" />
    <property name="initialSize" value="5" />
    <property name="maxActive" value="10" />
    <property name="poolPreparedStatements" value="true" />
    <property name="maxOpenPreparedStatements" value="10" />
</bean> 

Any help would be appreciated. Thanks.

Answer 1

If you are trying to work with in-memory databases and Spring, there is a new jdbc namespace for Spring 3 that makes working with embedded databases very easy.

The best part is that it acts as a DataSource, so it can easily be dropped in to replace your existing dataSource bean.

<jdbc:embedded-database id="dataSource" type="HSQL">
    <jdbc:script location="classpath:schema.sql"/>
    <jdbc:script location="classpath:test-data.sql"/>
</jdbc:embedded-database>

If you are more interested in doing this with Java Config, take a look at the EmbeddedDatabaseBuilder (new in Spring 3.0).

@Configuration
public class DatabaseTestConfig {
    @Bean
    public DataSource dataSource() {
        return new EmbeddedDatabaseBuilder()
            .setType(EmbeddedDatabaseType.HSQL)
            .addScript("classpath:schema.sql")
            .addScript("classpath:test-data.sql")
            .build();
    }
}