classloader-leak-prevention | ClassLoader leak prevention / protection

@Configuration
public class DataSourceConfiguration
{

    @Autowired
    private Environment env;

    @Bean(destroyMethod = "close")
    public ComboPooledDataSource dataSource()
    {

        String datasourcePathStartsWith = "datasource.";

        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        try
        {
            dataSource.setContextClassLoaderSource("library");
            dataSource.setPrivilegeSpawnedThreads(true);
            dataSource.setDriverClass("oracle.jdbc.driver.OracleDriver");
            dataSource.setJdbcUrl(env.getProperty(datasourcePathStartsWith + "url"));
            dataSource.setUser(env.getProperty(datasourcePathStartsWith + "user"));
            dataSource.setPassword(env.getProperty(datasourcePathStartsWith + "password"));
            dataSource.setMinPoolSize(Integer.parseInt(env.getProperty(datasourcePathStartsWith + "minPoolSize")));
            dataSource.setMaxPoolSize(Integer.parseInt(env.getProperty(datasourcePathStartsWith + "maxPoolSize")));
            dataSource.setCheckoutTimeout(Integer.parseInt(env.getProperty(datasourcePathStartsWith + "checkoutTimeout")));
            dataSource.setMaxIdleTime(Integer.parseInt(env.getProperty(datasourcePathStartsWith + "maxIdleTime")));
            dataSource.setMaxStatements(Integer.parseInt(env.getProperty(datasourcePathStartsWith + "maxStatements")));
        }
        catch (PropertyVetoException e)
        {
            e.printStackTrace();
        }
        return dataSource;
    }


}