CGLIB proxy not getting created for Transactional Proxies - spring

Question

Here is what I am doing:
#Component("jdbcBookDao")
public class JdbcBookDao extends JdbcDaoSupport implements BookDao{
#Autowired
public void injectDataSource(DataSource dataSource){
setDataSource(dataSource);
}
#Transactional
public int getStock(int isbn){
String sql = "SELECT bs.STOCK FROM BOOK b, BOOK_STOCK bs WHERE b.id=bs.book_id AND b.isbn=?";
return getJdbcTemplate().queryForInt(sql, isbn);
}
}
And in the application context, I have declared:
<tx:annotation-driven proxy-target-class="true"/>
With this config, I expected that when I fetch jdbcBookdao from context, it would be a CGLIB proxy(as I have set proxy-target-class to true). But when I debug, it comes as instance of JdkDynamicAopProxy. Can some one please explain why JDK proxy is getting created even when I requested for a CGLIB proxy?
Thanks.

Answer 1

Spring source code into object according to you if you use interface then the JDK proxy, if you use normal class then the cgLib.
e public AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException {
if (config.isOptimize() || config.isProxyTargetClass() || hasNoUserSuppliedProxyInterfaces(config)) {
Class targetClass = config.getTargetClass();
if (targetClass == null) {
throw new AopConfigException("TargetSource cannot determine target class: " +
"Either an interface or a target is required for proxy creation.");
}
if (targetClass.isInterface()) {
return new JdkDynamicAopProxy(config);
}
if (!cglibAvailable) {
throw new AopConfigException(
"Cannot proxy target class because CGLIB2 is not available. " +
"Add CGLIB to the class path or specify proxy interfaces.");
}
return CglibProxyFactory.createCglibProxy(config);
}
else {
return new JdkDynamicAopProxy(config);
}
}nter code here