Spring Social facebook + Spring Security

Question

I want to integrate Spring Social facebook into my application with Spring Security (I use xml configurations). All I need is just connect facebook account with my app's account. In simple example I found this:

<bean id="connectionRepository" factory-method="createConnectionRepository" 
      factory-bean="usersConnectionRepository" scope="request">
    <constructor-arg value="#{request.userPrincipal.name}" />
    <aop:scoped-proxy proxy-target-class="false" />
</bean>

So, as I understood, this method comes into play:

public ConnectionRepository createConnectionRepository(String userId) {
        if (userId == null) {
            throw new IllegalArgumentException("userId cannot be null");
        }
        return new JdbcConnectionRepository(userId, jdbcTemplate, connectionFactoryLocator, textEncryptor, tablePrefix);
    }

It resives "userId" from #{request.userPrincipal.name}. So, my question: How can I pass "userId" to this method if I want to obtain this "userId" using SecurityContextHolder.getContext().getAuthentication().getPrincipal().

The only way I see is to create my implementation of JdbcUsersConnectionRepository and redefine createConnectionRepository(String userId) method. But maybe there is more elegant solution.

Answer 1

There is another way:

<bean id="connectionRepository" factory-method="createConnectionRepository" factory-bean="usersConnectionRepository"
    scope="request">
    <constructor-arg value="#{authenticationService.getAuthenticatedUsername()}" />
    <aop:scoped-proxy proxy-target-class="false" />
</bean>

@Service("authenticationService")
public class AuthenticationService {

    public String getAuthenticatedUsername() {
        return SecurityContextHolder.getContext().getAuthentication().getPrincipal();
    }

}

You can do it complitely in SPeL too (I do not like this kind of dependencies):

<bean id="connectionRepository" factory-method="createConnectionRepository" factory-bean="usersConnectionRepository"
    scope="request">
    <constructor-arg value="#{T(org.springframework.security.core.context.SecurityContextHolder).getContext().getAuthentication().getPrincipal()}" />
    <aop:scoped-proxy proxy-target-class="false" />
</bean>