timoteoponce

public void close ( Process process ){
statement.close(process);
}  

timoteoponce

require "test/unit"

class Node
	attr_accessor :value, :left_node, :right_node, :parent_node
	
	def initialize(value=nil, left_node=nil, right_node=nil, parent_node = nil)
		@value = value
		@left_node = left_node
		@right_node = right_node
		@parent_node = parent_node

timoteoponce

class Order{
  void perform(){
  }
}

class OrderA extends Order{
}

@DependsOn(OrderA.class)
class OrderB extends Order{

timoteoponce

/**
 * @return an in-memory HSQL entityManager
 * @author Timoteo Ponce
 */
public static EntityManager createEntityManager() {
	Properties properties = new Properties();
	properties.put("javax.persistence.provider", "org.hibernate.ejb.HibernatePersistence");
	properties.put("javax.persistence.transactionType", "RESOURCE_LOCAL");
	properties.put("hibernate.connection.username", "sa");
	properties.put("hibernate.connection.password" ,"");

timoteoponce

User user = (User)entityManager.createQuery( "SELECT t FROM User t WHERE t.name like :param1" ).setParam("param1",parameter).singleResult();
doSomething( user );

timoteoponce

User user = userLister.withName( param1 ).get(0);
doSomething( user );
// and what about something more complex?
List<User> list = userLister.withName( name ).beingSingle( true ).withChidrenGt( 3 ).list();

timoteoponce

class Player
  
  def initialize
    @direction = :forward
  end
  
  def feel
    return @warrior.feel @direction
  end

timoteoponce

@Stateless @LocalBean
public class MyClass{
  @Resource(lookup = "java:openejb/Resource/helloDS")
  private DataSource dataSource;
  
  public int countSql(){
    Connection conn = datasource.getConnection();
    Statement st = null;
    try{

timoteoponce

int difference = 0;
DateTime start = new DateTime(source);
DateTime end = new DateTime(target);
if (source.after(target)) {
  start = end;
  end = new DateTime(source);
}
switch (type) {
  case MONTHS:
    difference = Months.monthsBetween(start, end).getMonths();

timoteoponce

Exercise: Messages list service

This exercise consists on creating a REST service that allows external applications to create and manage message lists, basically there are two contexts:

• User management: Services that allow the register, update or removal of users
• Messages management: Services that allow message exchange between registered users

So the service will allow users to be registered, send messages between them and retrieve all the messages directed to a specific user.

## Example