[Java Sprint] Spring XML Configuration : Constructor Injection Demo

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!-- Define a class, using implementation-->
    <bean name="foo" class="com.pluralsight.repository.HibernateCustomerRepositoryImpl"></bean>


    <!-- Setter injection: Inject HibernateCustomerRepositoryImpl to customerRepository -->
    <bean name="customerService" class="com.pluralsight.service.CustomerServiceImpl">
        <!--<property name="customerRepository" ref="foo"></property>-->
        <constructor-arg index="0" ref="foo"></constructor-arg>
    </bean>
</beans>

package com.pluralsight.service;

import com.pluralsight.model.Customer;
import com.pluralsight.repository.CustomerRepository;

import java.util.List;

public class CustomerServiceImpl implements CustomerService {


    //private CustomerRepository customerRepository = new HibernateCustomerRepositoryImpl();
    private CustomerRepository customerRepository;

    public CustomerServiceImpl () {

    }

    public CustomerServiceImpl (CustomerRepository customerRepository) {
        this.customerRepository = customerRepository;
    }
/*
    public void setCustomerRepository(CustomerRepository customerRepository) {
        this.customerRepository = customerRepository;
    }
*/

    @Override
    public List<Customer> findAll() {
        return customerRepository.findAll();
    }

}