The Khuc's Blog

Sunday, December 8, 2013

Hibernate JPA

Hibernate Implementation Class
import javax.ejb.Stateless;

import org.apache.commons.lang3.StringUtils;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Property;
import org.hibernate.criterion.Restrictions;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@Stateless
public class StudentServiceHibernateImpl implements StudentServiceEJBRemoteInt {

public StudentServiceHibernateImpl() {}

public void SaveStudentSurveyFormData(Student postData){
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx=session.getTransaction();
tx.begin();
session.saveOrUpdate(postData.getContact());

DetachedCriteria maxId = DetachedCriteria.forClass(Contact.class)
.setProjection( Projections.max("id"));
Contact con = (Contact) session.createCriteria(Contact.class)
.add(Property.forName("id").eq(maxId))
.uniqueResult();
postData.setContactId(con.getId());
session.saveOrUpdate(postData);
tx.commit();
}

public Student GetStudentSurveyData(Student student){
Surveys surveys = GetSurveys(student);
for(Student survey : surveys.data){
if(survey.getLastName().equalsIgnoreCase(student.getLastName()) && survey.getFirstName().equalsIgnoreCase(student.getFirstName())){
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx = session.beginTransaction();
Contact con = (Contact) session.createCriteria(Contact.class)
.add(Property.forName("id").eq(survey.getContactId()))
.uniqueResult();
survey.setContact(con);
tx.commit();
return survey;
}
}
return null;
}

public Surveys GetSurveys(Student searchCriteria){
Surveys surveys = new Surveys();
surveys.data = new ArrayList<Student>();

Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx = session.beginTransaction();
Criteria query = session.createCriteria(Student.class);

if(searchCriteria != null){
if(searchCriteria.getFirstName() != null && !searchCriteria.getFirstName().isEmpty()){
String firstName = searchCriteria.getFirstName().replace('*', '%');
query = query.add(Restrictions.like("firstName", firstName).ignoreCase());
}
if(searchCriteria.getLastName() != null && !searchCriteria.getLastName().isEmpty()){
String lastName = searchCriteria.getLastName().replace('*', '%');
query = query.add(Restrictions.like("lastName", lastName).ignoreCase());
}
if(searchCriteria.getCity() != null && !searchCriteria.getCity().isEmpty()){
String city = searchCriteria.getCity().replace('*', '%');
query = query.add(Restrictions.like("city", city).ignoreCase());
}
if(searchCriteria.getState() != null && !searchCriteria.getState().isEmpty()){
String state = searchCriteria.getState().replace('*', '%');
query = query.add(Restrictions.like("state", state).ignoreCase());
}
}
query = query.addOrder(Property.forName("lastName").asc());
query = query.addOrder(Property.forName("firstName").asc());

@SuppressWarnings("unchecked")
List<Student> surveyList = (List<Student>)query.list();
tx.commit();

if(surveyList.size() > 0){
surveys.data = surveyList;
}

return surveys;
}

public List<Student> GetStudents(Student searchCriteria) throws IOException{
Surveys surveys = GetSurveys(searchCriteria);
return surveys.data;
}

public List<String> GetSurveyNames(){
List<String> surveyNames = new ArrayList<String>();
Surveys surveys = GetSurveys(null);
for(Student survey : surveys.data){
surveyNames.add(survey.getFirstName() + " " + survey.getLastName());
}
return surveyNames;
}

public WinningResult ComputeMeanAndStandardDeviation(String raffle){
if(StringUtils.isEmpty(raffle)){
return new WinningResult(0,0);
}
String[] numbers = raffle.split(",");
double sum = 0;

for(int i=0; i < numbers.length; i++){
sum += Double.valueOf(numbers[i].trim());
}
double mean = Math.round((sum/numbers.length) * 100)/100;

double temp = 0;
for(int i=0; i < numbers.length; i++){
double num = Double.valueOf(numbers[i].trim());
temp += (mean - num) * (mean - num);
}
double variance = temp/numbers.length;
double standardDeviation = Math.round(Math.sqrt(variance) * 100)/100 ;

WinningResult data = new WinningResult(mean, standardDeviation);
return data;
}

@Override
public void DeleteStudent(Student postData) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx=session.getTransaction();
tx.begin();
Student student = (Student) session.createCriteria(Student.class)
.add(Property.forName("id").eq(postData.getId()))
.uniqueResult();
int contactId = student.getContactId();
Contact con = (Contact) session.createCriteria(Contact.class)
.add(Property.forName("id").eq(contactId))
.uniqueResult();
session.delete(student);
session.delete(con);
tx.commit();
}
}

Hibernate Interface
package tutorial.example;

import java.io.IOException;
import java.util.List;

import javax.ejb.Remote;
import javax.jws.WebService;

@WebService(targetNamespace = "http://gmuswe645.edu/wsdl")
@Remote
public interface StudentServiceEJBRemoteInt {
public List<Student> GetStudents(Student searchCriteria) throws IOException;
public Student GetStudentSurveyData(Student student);
public WinningResult ComputeMeanAndStandardDeviation(String raffle);
public void SaveStudentSurveyFormData(Student postData);
public void DeleteStudent(Student student);
}

Hibernate Util

package tutorial.example;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import org.hibernate.service.ServiceRegistryBuilder;

/**

* Hibernate Utility used to configure Hibernate's Session Factory and retrieve

* it.

public class HibernateUtil {

private static final SessionFactory sessionFactory;

private static ServiceRegistry serviceRegistry;

static {

try {

// Create the SessionFactory from hibernate.cfg.xml

// ------ --- -------------- ---- -----------------

Configuration configuration = new Configuration();

configuration.configure();

serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();

sessionFactory = new Configuration().configure().buildSessionFactory(serviceRegistry);

} catch (Throwable ex) {

// Make sure you log the exception, as it might be swallowed

// ---- ---- --- --- --- ---------- -- -- ----- -- ---------

System.err.println("Initial SessionFactory creation failed." + ex);

throw new ExceptionInInitializerError(ex);

}

/**

* Get the configured session factory

* @return session factory

public static SessionFactory getSessionFactory() {

return sessionFactory;

}

Hibernate Configuration

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-configuration PUBLIC

"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>

<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>

<property name="hibernate.connection.url">jdbc:oracle:thin:@...</property>

<property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>

<property name="current_session_context_class">thread</property>

<property name="format_sql">false</property>

</session-factory>

</hibernate-configuration>

Survey Configuration

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC

"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

<param name="sequence">SURVEY_SEQ</param>

</generator>

</id>

<one-to-one name="contact" class="tutorial.example.Contact" property-ref="id" cascade="all" fetch="join" />

</class>

<param name="sequence">CONTACT_SEQ</param>

</generator>

</id>

</class>

</hibernate-mapping>

Action Class

package tutorial.example;

import java.util.List;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import org.apache.commons.lang3.StringUtils;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class SurveyAction extends ActionSupport implements ModelDriven<Student> {

private static final long serialVersionUID = 1L;

private Student student;

private WinningResult winningResult;

private List<Student> surveysList;

private Context context;

private StudentServiceEJBRemoteInt serviceEJB;

public SurveyAction(){

try {

context = new InitialContext();

serviceEJB = (StudentServiceEJBRemoteInt) context.lookup("java:global/surveyapp-tkhuc/surveyapp-tkhuc-ejb/StudentServiceHibernateImpl!tutorial.example.StudentServiceEJBRemoteInt");

} catch (NamingException e) {

e.printStackTrace();

}

public String deletesurvey() throws Exception{

serviceEJB.DeleteStudent(student);

return SUCCESS;

}

public String listsurvey() throws Exception{

surveysList = (List<Student>) serviceEJB.GetStudents(null);

return SUCCESS;

}

public String displaysurvey() throws Exception{

student = (Student) serviceEJB.GetStudentSurveyData(student);

return SUCCESS;

}

public String searchsurvey() throws Exception{

surveysList = (List<Student>) serviceEJB.GetStudents(student);

return SUCCESS;

}

public String execute() throws Exception{

Student studentFound = (Student) serviceEJB.GetStudentSurveyData(student);

if(studentFound != null){

return "input";

}

serviceEJB.SaveStudentSurveyFormData(student);

winningResult = (WinningResult) serviceEJB.ComputeMeanAndStandardDeviation(student.getRaffle());

if(winningResult.getMean() > 90){

return "winner";

}

return "simple";

}

public void validate(){

if(student.getSkipsValidation())

return;

if(StringUtils.isEmpty(student.getFirstName())){

addFieldError("firstName", "First Name cannot be blank.");

}

if(StringUtils.isEmpty(student.getLastName())){

addFieldError("lastName", "Last Name cannot be blank.");

}

if(StringUtils.isEmpty(student.getStreetAddress())){

addFieldError("streetAddress", "Street Address cannot be blank.");

}

if(StringUtils.isEmpty(student.getCity())){

addFieldError("city", "City cannot be blank.");

}

if(StringUtils.isEmpty(student.getState())){

addFieldError("state", "State cannot be blank.");

}

if(StringUtils.isEmpty(student.getZip())){

addFieldError("zip", "Zip cannot be blank.");

}

if(StringUtils.isEmpty(student.getTelephone())){

addFieldError("telephone", "Telephone number cannot be blank.");

}

if(StringUtils.isEmpty(student.getEmail())){

addFieldError("email", "Email cannot be blank.");

}

if(StringUtils.isEmpty(student.getSurveyDate())){

addFieldError("surveyDate", "Survey date cannot be blank.");

}

public Student getStudent(){

return student;

}

public void setStudent(Student student){

this.student = student;

}

public WinningResult getWinningResult(){

return winningResult;

}

public void setWinningResult(WinningResult winningResult){

this.winningResult = winningResult;

}

public List<Student> getSurveysList() {

return surveysList;

}

public void setSurveysList(List<Student> surveysList) {

this.surveysList = surveysList;

}

@Override

public Student getModel() {

student = new Student();

return student;

}

Javax.JWS.WebService

Web Service Class
package tutorial.example;

import javax.ejb.Stateless;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;

import org.apache.commons.lang3.StringUtils;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Property;
import org.hibernate.criterion.Restrictions;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@WebService(
portName = "SurveyAppPort",
serviceName = "SurveyAppService",
targetNamespace = "http://gmuswe645.edu/wsdl",
endpointInterface = "tutorial.example.StudentServiceEJBRemoteInt")
@Stateless
public class StudentServiceHibernateImplWS implements StudentServiceEJBRemoteInt {

public StudentServiceHibernateImplWS() {}

public void SaveStudentSurveyFormData(Student postData){
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx=session.getTransaction();
tx.begin();
session.saveOrUpdate(postData.getContact());

DetachedCriteria maxId = DetachedCriteria.forClass(Contact.class)
.setProjection( Projections.max("id"));
Contact con = (Contact) session.createCriteria(Contact.class)
.add(Property.forName("id").eq(maxId))
.uniqueResult();
postData.setContactId(con.getId());
session.saveOrUpdate(postData);
tx.commit();
}

public Student GetStudentSurveyData(Student student){
Surveys surveys = GetSurveys(student);
for(Student survey : surveys.data){
if(survey.getLastName().equalsIgnoreCase(student.getLastName()) && survey.getFirstName().equalsIgnoreCase(student.getFirstName())){
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Contact con = (Contact) session.createCriteria(Contact.class)
.add(Property.forName("id").eq(survey.getContactId()))
.uniqueResult();
survey.setContact(con);
return survey;
}
}
return null;
}

public Surveys GetSurveys(Student searchCriteria){
Surveys surveys = new Surveys();
surveys.data = new ArrayList<Student>();

Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx = session.beginTransaction();
Criteria query = session.createCriteria(Student.class);

if(searchCriteria != null){
if(searchCriteria.getFirstName() != null && !searchCriteria.getFirstName().isEmpty()){
String firstName = searchCriteria.getFirstName().replace('*', '%');
query = query.add(Restrictions.like("firstName", firstName).ignoreCase());
}
if(searchCriteria.getLastName() != null && !searchCriteria.getLastName().isEmpty()){
String lastName = searchCriteria.getLastName().replace('*', '%');
query = query.add(Restrictions.like("lastName", lastName).ignoreCase());
}
if(searchCriteria.getCity() != null && !searchCriteria.getCity().isEmpty()){
String city = searchCriteria.getCity().replace('*', '%');
query = query.add(Restrictions.like("city", city).ignoreCase());
}
if(searchCriteria.getState() != null && !searchCriteria.getState().isEmpty()){
String state = searchCriteria.getState().replace('*', '%');
query = query.add(Restrictions.like("state", state).ignoreCase());
}
}
query = query.addOrder(Property.forName("lastName").asc());
query = query.addOrder(Property.forName("firstName").asc());

@SuppressWarnings("unchecked")
List<Student> surveyList = (List<Student>)query.list();
tx.commit();

if(surveyList.size() > 0){
surveys.data = surveyList;
}

return surveys;
}

@WebMethod
public List<Student> GetStudents(@WebParam Student searchCriteria) throws IOException{
Surveys surveys = GetSurveys(searchCriteria);
return surveys.data;
}

public List<String> GetSurveyNames(){
List<String> surveyNames = new ArrayList<String>();
Surveys surveys = GetSurveys(null);
for(Student survey : surveys.data){
surveyNames.add(survey.getFirstName() + " " + survey.getLastName());
}
return surveyNames;
}

public WinningResult ComputeMeanAndStandardDeviation(String raffle){
if(StringUtils.isEmpty(raffle)){
return new WinningResult(0,0);
}
String[] numbers = raffle.split(",");
double sum = 0;

for(int i=0; i < numbers.length; i++){
sum += Double.valueOf(numbers[i].trim());
}
double mean = Math.round((sum/numbers.length) * 100)/100;

double temp = 0;
for(int i=0; i < numbers.length; i++){
double num = Double.valueOf(numbers[i].trim());
temp += (mean - num) * (mean - num);
}
double variance = temp/numbers.length;
double standardDeviation = Math.round(Math.sqrt(variance) * 100)/100 ;

WinningResult data = new WinningResult(mean, standardDeviation);
return data;
}

@Override
public void DeleteStudent(Student postData) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
Transaction tx=session.getTransaction();
tx.begin();
Student student = (Student) session.createCriteria(Student.class)
.add(Property.forName("id").eq(postData.getId()))
.uniqueResult();
int contactId = student.getContactId();
Contact con = (Contact) session.createCriteria(Contact.class)
.add(Property.forName("id").eq(contactId))
.uniqueResult();
session.delete(student);
session.delete(con);
tx.commit();
}
}

Web Service Interface
package tutorial.example;

import java.io.IOException;
import java.util.List;

import javax.ejb.Remote;
import javax.jws.WebService;

@WebService(targetNamespace = "http://gmuswe645.edu/wsdl")
@Remote
public interface StudentServiceEJBRemoteInt {
public List<Student> GetStudents(Student searchCriteria) throws IOException;
public Student GetStudentSurveyData(Student student);
public WinningResult ComputeMeanAndStandardDeviation(String raffle);
public void SaveStudentSurveyFormData(Student postData);
public void DeleteStudent(Student student);
}

Action Class

package tutorial.serviceexample;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.List;

import javax.xml.namespace.QName;

import javax.xml.ws.Service;

import tutorial.example.Student;

import tutorial.example.StudentServiceEJBRemoteInt;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class SurveyAction extends ActionSupport implements ModelDriven<Student> {

private static final long serialVersionUID = 1L;

private Student student;

private List<Student> surveysList;

private Service surveyService;

private StudentServiceEJBRemoteInt surveyWs;

public SurveyAction(){

try {

surveyService = Service.create(

new URL("http://localhost:8080/surveyapp-tkhuc-ejb/SurveyAppService/StudentServiceHibernateImplWS?wsdl"),

new QName("http://gmuswe645.edu/wsdl", "SurveyAppService"));

surveyWs = surveyService.getPort(StudentServiceEJBRemoteInt.class);

} catch (MalformedURLException e) {

e.printStackTrace();

}

public String searchsurvey() throws Exception{

surveysList = (List<Student>) surveyWs.GetStudents(student);

return SUCCESS;

}

public void validate(){

}

public Student getStudent(){

return student;

}

public void setStudent(Student student){

this.student = student;

}

public List<Student> getSurveysList() {

return surveysList;

}

public void setSurveysList(List<Student> surveysList) {

this.surveysList = surveysList;

}

@Override

public Student getModel() {

student = new Student();

return student;

}

public int getSurveysListCount() {

int count = 0;

if(surveysList != null)

count = surveysList.size();

return count;

}

Web Project Files Structure

EJB Project Files Structure

EAR Project Files Structure

META-INF\application.xml
<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" version="6">
<display-name>surveyapp-tkhuc</display-name>
<module>
<web>
<web-uri>surveyapp-tkhuc-web.war</web-uri>
<context-root>surveyapp</context-root>
</web>
</module>
<module>
<ejb>surveyapp-tkhuc-ejb.jar</ejb>
</module>
</application>

Saturday, November 23, 2013

New Read: Becoming Agile in an Imperfect World

Saturday, November 9, 2013

New Read: Single Page Web Applications

New Read: Notes to a Software Team Leader - Growing Self Organizing Teams

Tuesday, October 8, 2013

New Read: Enterprise JavaBeans 3.1

Enterprise JavaBeans 3.1

Recent Book Read: Third-Party JavaScript

Another good Manning book: Third-Party JavaScript

Tuesday, September 10, 2013

Nuget Package Source v1

Thursday, August 29, 2013

MSBuild Choose When Condition

msbuild buildfile.build /target:Deploy /p:Configuration=Release;Environment=Dev

<Choose>
    <When Condition=" '$(Environment)'=='' Or '$(Environment)'=='Dev' ">
      <PropertyGroup>
        <SourceXMLFile>web.dev.config</SourceXMLFile>
        <WebServerName></WebServerName>
        <WebServerUserName></WebServerUserName>
        <WebServerPassword></WebServerPassword>
      </PropertyGroup>
    </When>
    <When Condition=" '$(Environment)'=='Test' ">
      <PropertyGroup>
        <SourceXMLFile>web.test.config</SourceXMLFile>
        <WebServerName></WebServerName>
        <WebServerUserName></WebServerUserName>
        <WebServerPassword></WebServerPassword>
      </PropertyGroup>
    </When>
</Choose>

Friday, August 23, 2013

Visual Studio 2012 Update: Extensions for Windows Library for Javascript

Sunday, July 28, 2013

Recent Books Read

Dependency Injection in .NET

Secrets of the JavaScript Ninja

The art of Unit Testing with Examples in .NET

Monday, July 22, 2013

Installed Infragistics Ignite UI

Tuesday, July 2, 2013

Visual Studio 2012 Update 3

Friday, June 14, 2013

Calling User Defined Function in Entity Framework 5

public string ExecuteUserDefinedFunctionReturningScalarStringValue(int inputValue)
{
    var query = "SELECT [dbo].[UserDefinedFunctionName]({0})";
    object[] param = { inputValue };
    var outputString = Context.Database.SqlQuery<string>(query, param).FirstOrDefault();

    return outputString;
}

Calling Store Procedure in Entity Framework 5

Model.Context.cs:

public virtual int DbStoreProcedureName(ObjectParameter output_string, Nullable<int> inputId)
{
    var inputIdParameter = inputId.HasValue ?
        new ObjectParameter("inputParam1", inputId) :
        new ObjectParameter("inputParam1", typeof(int));

    return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("DbStoreProcedureName", output_string, inputIdParameter);
}

Usage:

var inputValue = 5;
var outputParam = new ObjectParameter("output_string", typeof(string));
Context.DbStoreProcedureName(outputString, intputValue);
var outputString = outputParam.Value.ToString();

Monday, May 13, 2013

Setting up Rational Team Concert Client for Visual Studio 2012

Sunday, April 28, 2013

Current Visual Studio Theme: Cointen

Cointen is currently my favorite theme. It has red text, which helps keep me focused on what is important. Give it a try at http://studiostyl.es/schemes/cointen.

Wednesday, March 20, 2013

Advanced C#

Topics:
Higher Calling Functions
Lazy Code
Asynch and Parallel

static void Main(string[] args)
{
var elapsed = Measure(() =>
{
  var numbers = new[]{3, 5, 7, 9, 11, 13};
  foreach(var prime in numbers.Find(IsPrime).Take(2))
  {
   Console.WriteLine(prime);
  }
});
Console.WriteLine(elapsed);

//Parallel
Parallel.Invoke(new Action[]
{
  () => FindLargePrimes(3,100),
  () => FindLargePrimes(101,200)
});

//Task
var task = new Task<IEnumerable<int>>(
  () => FindLargePrimes(3,100)
);
var task2 = task.ContinueWith((antecedent) =>
      {
       foreach(var number in antecedent.Result)
       {
        Console.WriteLine(number);
       }
      });
task.Start();
Console.WriteLine("Doing other work");
task2.Wait();
}

private static IEnumerable<int> Find(this IEnumerable<int> values, Func<int, bool> test)
{
foreach(var number in values)
{
  if(test(number))
  {
   yield return number;
  }
}
}

private static bool IsPrime(int number) [...]

private TimeSpan Measure(Action action)
{
var watch = new StopWatch();
watch.start();
action();
return watch.Elapsed;
}

Reference: Scott Allen's C# Fundamentals - Part 2

Thursday, March 14, 2013

Dynamic C#

using System.Dynamic;

public class Employee
{
public string FirstName {get; set;}

public void Speak()
{
  Console.WriteLine("Hi, my name is {0}", FirstName);
}
}
class Program
{
static void Main(string[] args)
{
  //old method
  object o = GetASpeaker();
  o.GetType().GetMethod("Speak").Invoke(0, null);

  //dynamic object
  dynamic o = GetASpeaker();
  o.Speak();

  //loading 3rd-party assembly and dynamic object
  Type dogType = Assembly.Load("Dogs").GetType("Dog");
  dynamic dog = Activator.CreateInstance(dogType);
  dog.Speak();

  //excel automation and dynamic object
  Type excelType = Type.GetTypeFromProgId("Excel.Application");
  dynamic excel = Activator.CreateInstance(excelType);
  excel.Visible = true;
  excel.Workbooks.Add();
  dynamic sheet = excel.ActiveSheet;
  Process[] processes = Process.GetProcesses();
  for(int i = 0; i < processes.Length; i++)
  {
   sheet.Cells[i+1, "A"] = processes[i].ProcessName;
   sheet.Cells[i+1, "B"] = processes[i].Threads.Count;
  }

  //expandoobject
  dynamic expando = new ExpandoObject();
  //or, dynamic expando = new ExpandoObject() as IDictionary<string, object>;
  expando.Name = "The";
  //or, expando["Name"] = "The"
  expando.Speak = new Action(() => Console.WriteLine(expando.Name));

  foreach(var member in expando)
  {
   Console.WriteLine(member.Key);
  }

  expando.Speak();

  //implements dynamicobject interface
  dynamic doc = new DynamicXml("Employees.xml");
  foreach(var employee in doc.Employees)
  {
   Console.WriteLine(employee.FirstName);
  }

  //C# and IronRuby interaction

  // running .rb file with passed c# object
  var engine = IronRuby.Ruby.CreateEngine();
  var scope = engine.CreateScope();
  scope.SetVariable("employee", new Employee { FirstName = "The C#"});
  engine.ExecuteFile("Program.rb", scope);

  // instantiates classes from .rb file in c# code
  dynamic ruby = engine.Runtime.Globals;
  dynamic person = ruby.Person.@new();
  person.firstName = "The Ruby";
  person.speak();
}

private static object GetASpeaker()
{
  return new Employee { FirstName = "Scott" };
}
}
internal class DynamicXml : System.Dynamic.DynamicObject, System.Collections.IEnumerable
{
private dynamic _xml;

public DynamicXml(string fileName)
{
  _xml = XDocument.Load(fileName);
}

public DynamicXml(dynamic xml)
{
  _xml = xml;
}

public override bool TryGetMember(GetMemberBinder binder, out object results)
{
  var xml = _xml.Element(binder.Name);
  if(xml != null)
  {
   result = new DynamicXml(xml);
   return true;
  }

  result = null;
  return false;
}

public IEnumerator GetEnumerator()
{
  foreach(var child in _xml.Elements())
  {
   yield return new DynamicXml(child);
  }
}
}

Program.rb
class Person
attr_accessor :firstName

def speak
  puts @firstName
end
end
employee.Speak

Reference: Scott Allen's C# Fundamentals Part 2