Modular J2EE, Using Spring DM, Zk and EclipseLink

package com.cp.adrabi.jln.todo.services.impl;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.cp.adrabi.jln.model.Todo;
import com.cp.adrabi.jln.todo.services.TodoService;
import com.googlecode.ehcache.annotations.Cacheable;
import com.googlecode.ehcache.annotations.TriggersRemove;
import com.googlecode.ehcache.annotations.When;

/**
 * 
 * @author ADRABI Abderrahim (z3vil)
 *
 */
@Service("todoService")
@Transactional
@Repository
public class TodoServiceImpl implements TodoService
{

	private final static String SELECT_ALL_TODO = "select t from Todo t";
	
	@PersistenceContext
	private EntityManager entityManager;
	
	@Override
	@Cacheable(cacheName="todoCache")
	public Todo getTodoById(Long id) 
	{
		return this.entityManager.find(Todo.class, id);
	}

	@Override
	@Cacheable(cacheName="todoCache")
	public List<Todo> getListTodo() 
	{
		return this.entityManager.createQuery( SELECT_ALL_TODO, Todo.class).getResultList();
	}

	@Override
	@TriggersRemove(cacheName="todoCache",removeAll=true, when=When.AFTER_METHOD_INVOCATION)
	public void saveTodo(Todo todo) 
	{
		this.entityManager.persist(todo);
	}

	@Override
	@TriggersRemove(cacheName="todoCache", removeAll=true, when=When.AFTER_METHOD_INVOCATION)
	public void updateTodo(Todo todo) 
	{
		this.entityManager.merge(todo);
	}

	@Override
	@TriggersRemove(cacheName="todoCache", removeAll=true, when=When.AFTER_METHOD_INVOCATION)
	public void removeTodoById(Long id) 
	{
		Object tmp = this.entityManager.getReference(Todo.class, id);
		this.entityManager.remove(tmp);
	}
}