[Acegisecurity-developer] im fed up -- pls help

[Karthik V]

I need to do ldap authentication using a very basic form, using spring. I know that the ldap stuff needs to be configured as

<bean id="initialDirContextFactory"
class="org.acegisecurity.providers.ldap.DefaultInitialDirContextFactory ">
   <constructor-arg>
       <value>ldap://hostname:389/dc=example,dc=com</value>
   </constructor-arg>
</bean>
<bean id="ldapAuthenticationProvider"
   class="org.acegisecurity.providers.ldap.LdapAuthenticationProvider">
   <constructor-arg>
       <bean
class="org.acegisecurity.providers.ldap.authenticator.BindAuthenticator">
           <constructor-arg>
               <ref bean="initialDirContextFactory"/>
           </constructor-arg>
           <property name="userDnPatterns">
               <list><value>uid={0},ou=people</value></list>
           </property>
       </bean>
   </constructor-arg>
   <constructor-arg>
       <bean
class="org.acegisecurity.providers.ldap.populator.DefaultLdapAuthoritiesPopulator ">
           <constructor-arg>
               <ref bean="initialDirContextFactory"/>
           </constructor-arg>
           <constructor-arg><value>ou=groups</value></constructor-arg>
           <property name="groupRoleAttribute">
               <value>cn</value>
           </property>
           <property name="groupSearchFilter">
               <value>(|(member={0})(uniqueMember={0}))</value>
           </property>
       </bean>
   </constructor-arg>
</bean>

But I'm new to spring, and I dont understand how to go about end-to-end - like, apart from this, what other configurations I need to add, the controllers etc., and how to link my form to this.  I have gone thru a number of spring tutorials and am able to do a simple form validation properly. But I really dont understand how to go about using the above snippet.

Please please give me some clue or point me to some document that helps me accomplish what I want. I've spent too much time on this due to lack of good docs that give end to end explanation for beginners.