How to configure ldap with spring 4.0 - spring-mvc

Question

I am facing issue in authenticating with openldap, I dont know how to configure spring security, ldap with Spring 4.0.0 version. Kindly provide sample reference.
<beans:bean id="contextSource"
class="org.springframework.security.ldap.DefaultSpringSecurityContextSource">
<beans:constructor-arg
value="ldap://localhost:389/dc=test,dc=com" />
</beans:bean>
<security:ldap-server id="contextSource"
url="ldap://localhost:389/dc=test,dc=com" />
<beans:bean id="authMgr"
class="org.springframework.security.authentication.ProviderManager">
<beans:constructor-arg>
<beans:list>
<beans:bean id="ldapAuthProvider"
class="org.springframework.security.ldap.authentication.LdapAuthenticationProvider">
<beans:constructor-arg>
<beans:bean
class="org.springframework.security.ldap.authentication.BindAuthenticator">
<beans:constructor-arg ref="contextSource" />
<beans:property name="userDnPatterns">
<beans:list>
<beans:value>uid={0},ou=users</beans:value>
</beans:list>
</beans:property>
</beans:bean>
</beans:constructor-arg>
</beans:bean>
</beans:list>
</beans:constructor-arg>
</beans:bean>
<security:authentication-manager>
<security:ldap-authentication-provider
server-ref="contextSource" user-search-base="ou=users"
user-search-filter="(uid={0})" group-search-filter="ou=groups">
<security:password-compare hash="{sha}"
password-attribute="userPassword" />
</security:ldap-authentication-provider>
</security:authentication-manager>

Answer 1

Spring Security 4.0 LDAP Reference
LDAP best practise would be to search for the DN of the entry, hence configure
<bean id="userSearch" class="org.springframework.security.ldap.search.FilterBasedLdapUserSearch">
<constructor-arg index="0" value=""/>
<constructor-arg index="1" value="(uid={0})"/>
<constructor-arg index="2" ref="contextSource" />
</bean>
Also typically the LDAP static group entries' naming attribute is cn, hence configure
<bean class="org.springframework.security.ldap.userdetails.DefaultLdapAuthoritiesPopulator">
<constructor-arg ref="contextSource"/>
<constructor-arg value="ou=groups"/>
<property name="groupRoleAttribute" value="cn"/>
</bean>
instead of the example shown in the guide