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Apache Wicket

and Java EE sitting in a tree
Martijn Dashorst

topicus onderwijs
APACHE WICKET
Wicket and Java EE
servlet 3
JSF 2
EJB 3.1
JPA 2
JSP
CDI
JTA
Bean
Validation
JAX-WS
JAX-RPC
JAXR
SAAJ
JAX-RS
JAXB
JMS
JAAS
JASPIC
JACC
JCA
Ja...
s/[JSF|JSP]/Wicket/🌍
Wicket's mission statement from 2004
servlet 3
JSF 2
EJB 3.1
JPA 2
JSP
CDI
JTA
Bean
Validation
JAX-WS
JAX-RPC
JAXR
SAAJ
JAX-RS
JAXB
JMS
JAAS
JASPIC
JACC
JCA
Ja...
servlet 3
JSF 2
EJB 3.1
JPA 2
JSP
CDI
JTA
Bean
Validation
JAX-WS
JAX-RPC
JAXR
SAAJ
JAX-RS
JAXB
JMS
JAAS
JASPIC
JACC
JCA
Ja...
What is Wicket?
wicket |ˈwɪkɪt|
noun
1 Cricket each of the sets of three stumps with two bails across the top at either end of the pitch,
...
wicket |ˈwɪkɪt|
noun
1 a component oriented, open source, Java
web application framework
components everywhere
components everywhere
components everywhere
Injection (EJB, CDI)
Conversations (CDI)
JPA
Bean validation
Arquillian
Cheese Store
Example
1. Setup project
2. Add 'domain layer'
3. Add components
First steps
1. setup the project
Remove unnecessary files
Rename package to
'com.cheesr.web'
package com.cheesr.web;
import org.apache.wicket.markup.html.WebPage;
public class Index extends WebPage {
public Index() ...
package com.cheesr.web;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.protocol.http.WebApplica
pu...
2. Add 'domain model'
entities
package com.cheesr.dao;
public class CheeseDao {
}
package com.cheesr.dao;
public class CheeseDao {
public List<Cheese> getCheeses() {
}
}
package com.cheesr.dao;
/*...*/
public class CheeseDao {
public List<Cheese> getCheeses() {
return asList();
}
}
package com.cheesr.dao;
/*...*/
public class CheeseDao {
public List<Cheese> getCheeses() {
return asList(
new Cheese());
...
package com.cheesr.dao;
/*...*/
public class CheeseDao {
public List<Cheese> getCheeses() {
return asList(
new Cheese(
"Go...
package com.cheesr.dao;
/*...*/
public class CheeseDao {
public List<Cheese> getCheeses() {
return asList(
new Cheese(
"Go...
package com.cheesr.dao;
/*...*/
public class CheeseDao {
public List<Cheese> getCheeses() {
return asList(
new Cheese(
"Go...
package com.cheesr.dao;
public class OrderDao {
}
package com.cheesr.dao;
public class OrderDao {
public void save(Order order) {
}
}
package com.cheesr.dao;
public class OrderDao {
private List<Order> orders = new ArrayList<>();
public void save(Order ord...
package com.cheesr.dao;
public class OrderDao {
private List<Order> orders = new ArrayList<>();
public void save(Order ord...
package com.cheesr.dao;
public class OrderDao {
private List<Order> orders = new ArrayList<>();
public void save(Order ord...
package com.cheesr.dao;
public class OrderDao {
private List<Order> orders = new ArrayList<>();
public void save(Order ord...
3. Add components
<div class="cheese">
<h3>Gouda</h3>
<p>Named after the Dutch town of Gouda, just ou
<p>
<span>$1.99</span>
<a href="#">Add...
<div wicket:id="cheese" class="cheese">
<h3 wicket:id="name">Gouda</h3>
<p wicket:id="description">Named after the Dutc
<p...
public class Index extends WebPage {
public Index() {
}
}
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
public Index() {
}
}
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
public Index() {
List<Cheese> cheeses ...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
public Index() {
List<Cheese> cheeses ...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
public Index() {
List<Cheese> cheeses ...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
public Index() {
List<Cheese> cheeses ...
<h3>Your Selection</h3>
<table>
<tbody>
<tr>
<td>Gouda</td>
<td>€<span>1.99</span></td>
<td><a href="#">remove</a></td>
</...
<h3>Your Selection</h3>
<table>
<tbody>
<tr wicket:id="item">
<td wicket:id="name">Gouda</td>
<td>€<span wicket:id="price"...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
public Index() {
List<Cheese> cheeses ...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
<div wicket:id="cheese" class="cheese">
<h3 wicket:id="name">Gouda</h3>
<p wicket:id="description">Named after the Dutc
<p...
<div wicket:id="cheese" class="cheese">
<h3 wicket:id="name">Gouda</h3>
<p wicket:id="description">Named after the Dutc
<p...
add(new ListView<Cheese>("cheese", cheeses) {
@Override
protected void populateItem(ListItem<Cheese> item) {
Cheese c = it...
add(new ListView<Cheese>("cheese", cheeses) {
@Override
protected void populateItem(ListItem<Cheese> item) {
Cheese c = it...
add(new ListView<Cheese>("cheese", cheeses) {
@Override
protected void populateItem(ListItem<Cheese> item) {
Cheese c = it...
add(new ListView<Cheese>("cheese", cheeses) {
@Override
protected void populateItem(ListItem<Cheese> item) {
Cheese c = it...
add(new ListView<Cheese>("cheese", cheeses) {
@Override
protected void populateItem(ListItem<Cheese> item) {
Cheese c = it...
add(new ListView<Cheese>("cheese", cheeses) {
@Override
protected void populateItem(ListItem<Cheese> item) {
Cheese c = it...
Injection (EJB, CDI)
Conversations (CDI)
JPA
Bean validation
Testing with Arquillian
Using EJBs
Add EJB dependencies 

to project
Make DAOs EJBs
Inject DAOs
Steps
<dependencies>
<!-- EJB DEPENDENCIES -->
<dependency>
<groupId>org.jboss.spec.javax.ejb</groupId>
<artifactId>jboss-ejb-ap...
Add EJB dependencies 

to project
Make DAOs EJBs
Inject DAOs
Steps
public class CheeseDao {
public List<Cheese> getCheeses() {…}
}
public class OrderDao {
public void save(Order order) {…}
...
public class CheeseDao {
public List<Cheese> getCheeses() {…}
}
public class OrderDao {
public void save(Order order) {…}
...
@Stateless
public class CheeseDao {
public List<Cheese> getCheeses() {…}
}
public class OrderDao {
public void save(Order ...
@Stateless
public class CheeseDao {
public List<Cheese> getCheeses() {…}
}
@Stateless
public class OrderDao {
public void ...
@Stateless
public class CheeseDao {
public List<Cheese> getCheeses() {…}
}
@Stateless
public class OrderDao {
public void ...
Add EJB dependencies 

to project
Make DAOs EJBs
Inject DAOs
Steps
@Stateless
public class CheeseDao {
public List<Cheese> getCheeses() {…}
}
@Stateless
public class OrderDao {
public void ...
21:20:55,305 Processing weld deployment cheesr.war
21:20:55,313 JNDI bindings for session bean named CheeseDao
in deployme...
public class Index extends WebPage
{
@EJB
private CheeseDao cheeseDao;
private Cart cart = new Cart();
public Index()
{
Li...
public class Index extends WebPage
{
@EJB
private CheeseDao cheeseDao;
private Cart cart = new Cart();
public Index()
{
Li...
Wicket is unmanaged, container doesn't
know about Pages, Components, etc.
<dependencies>
<!-- EJB DEPENDENCIES -->
<dependency>
<groupId>org.jboss.spec.javax.ejb</groupId>
<artifactId>jboss-ejb-ap...
public class WicketApplication extends WebApplication
{
@Override
public Class< ? extends WebPage> getHomePage()
{
return ...
public class WicketApplication extends WebApplication
{
@Override
public Class< ? extends WebPage> getHomePage()
{
return ...
• add EJB dependency and wicketstuff-
javaee-inject dependency
• make DAOs EJBs
• configure component instantiation listener...
Using CDI for injection
<dependencies>
<!-- CDI DEPENDENCIES -->
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>...
public class WicketApplication extends WebApplication
{
@Override
public void init()
{
super.init();
}
}
public class WicketApplication extends WebApplication
{
@Override
public void init()
{
super.init();
CdiConfiguration cdiC...
@ApplicationScoped
public class MessageOfTheDay
{
public String getMessage()
{
return "What happens to the hole when the c...
public class Index extends WebPage {
@EJB
private CheeseDao cheeseDao;
public Index()
{
List<Cheese> cheeses = cheeseDao.g...
public class Index extends WebPage {
@EJB
private CheeseDao cheeseDao;
@Inject
private MessageOfTheDay message;
public Ind...
public class Index extends WebPage {
@EJB
private CheeseDao cheeseDao;
@Inject
private MessageOfTheDay message;
public Ind...
Injecting in non-managed
objects
public class MessageModel
extends LoadableDetachableModel<String> {
@Inject
private MessageOfTheDay messages;
@Override
pr...
Caused by: java.lang.NullPointerException
at com.cheesr.web.MessageModel.load(MessageModel.java:15) [:]
at com.cheesr.web....
public class MessageModel
extends LoadableDetachableModel<String> {
@Inject
private MessageOfTheDay messages;
@Override
pr...
public class MessageModel
extends LoadableDetachableModel<String> {
@Inject
private MessageOfTheDay messages;
public Messa...
• Add wicket-cdi-1.1 and javax.cdi-api
• Configure Wicket's CdiConfiguration
• Use @Inject injection
• Use NonContextual in ...
Injection (EJB, CDI)
Conversations (CDI)
JPA
Bean validation
Testing with Arquillian
4. Navigate to Checkout
5. Implement Checkout
6. Make Cart Conversation Scoped
Next steps
4. navigate to checkout
<div id="cart">
<h3>Your Selection</h3>
<table>
<tbody>…</tbody>
<tfoot>…</tfoot>
</table>
<input type="button" value="Che...
<div id="cart">
<h3>Your Selection</h3>
<table>
<tbody>…</tbody>
<tfoot>…</tfoot>
</table>
<input wicket:id="checkout" typ...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class Index extends WebPage {
private CheeseDao cheeseDao = new CheeseDao();
private Cart cart = new Cart();
public...
public class CheckoutPage extends WebPage {
private Cart cart = new Cart();
public CheckoutPage(Cart cart) {
this.cart = c...
5. implement checkout
<form >
<h3>Check out</h3>
<p>Please enter your billing address.</p>
<table>
<tr>
<th>Name</th>
<td><input type="text" /><...
<form wicket:id="form">
<h3>Check out</h3>
<p>Please enter your billing address.</p>
<table>
<tr>
<th>Name</th>
<td><input...
public class CheckoutPage extends WebPage {
private Cart cart;
public CheckoutPage(Cart cart) {
this.cart = cart;
}
}
public class CheckoutPage extends WebPage {
private Cart cart;
public CheckoutPage(Cart cart) {
this.cart = cart;
Form<Voi...
public class CheckoutPage extends WebPage {
private Cart cart;
public CheckoutPage(Cart cart) {
this.cart = cart;
Form<Voi...
public class CheckoutPage extends WebPage {
private Cart cart;
private Order order = new Order();
public CheckoutPage(Cart...
public class CheckoutPage extends WebPage {
private Cart cart;
private Order order = new Order();
@EJB
private OrderDao or...
public class CheckoutPage extends WebPage {
…
public CheckoutPage(Cart cart) {
this.cart = cart;
Form<Void> form = new For...
public class CheckoutPage extends WebPage {
…
public CheckoutPage(Cart cart) {
this.cart = cart;
Form<Void> form = new For...
public class CheckoutPage extends WebPage {
…
public CheckoutPage(Cart cart) {
this.cart = cart;
Form<Void> form = new For...
public class CheckoutPage extends WebPage {
…
public CheckoutPage(Cart cart) {
this.cart = cart;
Form<Void> form = new For...
6. make Cart 

Conversation Scoped
What does the navigation between
shopping and checkout look like?
public class Index extends WebPage {
public Index() {
…
add(new Link<Void>("checkout") {
@Override
public void onClick() {...
public class Index extends WebPage {
public Index() {
…
add(new Link<Void>("checkout") {
@Override
public void onClick() {...
public class Index extends WebPage {
public Index() {
…
add(new Link<Void>("checkout") {
@Override
public void onClick() {...
public class Cart implements Serializable {
public Cart() {
}
public void setItems(List<Cheese> items) {
this.items = item...
@ConversationScoped
public class Cart implements Serializable {
private List<Cheese> items = new ArrayList<>();
public Car...
Let's get this conversation started

public class Index extends WebPage {
…
public Index() {
…
add(new Link<Void>("checkout") {
@Override
public void onClick()...
public class Index extends WebPage {
…
@Inject
private Conversation shopping;
public Index() {
…
add(new Link<Void>("check...
public class Index extends WebPage {
…
@Inject
private Conversation shopping;
public Index() {
…
shopping.begin();
…
add(n...
public class Index extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart = new Cart();
publ...
public class Index extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Index() {
...
public class Index extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Index() {
...
public class CheckoutPage extends WebPage {
@EJB
private OrderDao orders;
private Order order = new Order();
private Cart ...
public class CheckoutPage extends WebPage {
@EJB
private OrderDao orders;
private Order order = new Order();
private Cart ...
public class CheckoutPage extends WebPage {
@EJB
private OrderDao orders;
private Order order = new Order();
private Cart ...
public class CheckoutPage extends WebPage {
@EJB
private OrderDao orders;
private Order order = new Order();
@Inject
priva...
Let's end this conversation

public class CheckoutPage extends WebPage {
…
@Inject
private Cart cart;
public CheckoutPage() {
Form<Void> form = new For...
public class CheckoutPage extends WebPage {
…
@Inject
private Cart cart;
public CheckoutPage() {
Form<Void> form = new For...
public class CheckoutPage extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Che...
public class CheckoutPage extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Che...
localhost:8080/cheesr/?0&cid=1
⟳
public class CheckoutPage extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Che...
public class CheckoutPage extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Che...
public class CheckoutPage extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Che...
public class CheckoutPage extends WebPage {
…
@Inject
private Conversation shopping;
@Inject
private Cart cart;
public Che...
• Add wicket-cdi-1.1 and javax.cdi-api
• Configure Wicket's CdiConfiguration
• Use @Inject injection and
@ConversationScoped...
Injection (EJB, CDI)
Conversations (CDI)
JPA
Bean validation
Testing with Arquillian
Cheese, Order, OrderItem now @Entity
Order → OrderItem

@OneToMany(fetchType=LAZY)
OrderItem → Cheese, OrderItem → Order

...
A refreshing model
A model that reloads data from DB 

for every render
public class OrdersModel {

}
public class OrdersModel 

extends LoadableDetachableModel<List<Order>> {
}
public class OrdersModel 

extends LoadableDetachableModel<List<Order>> {
@Override
protected List<Order> load() {
}
}
public class OrdersModel 

extends LoadableDetachableModel<List<Order>> {
@Override
protected List<Order> load() {
return ...
public class OrdersModel 

extends LoadableDetachableModel<List<Order>> {
@Inject
private OrderDao orders;
@Override
prote...
public class OrdersModel 

extends LoadableDetachableModel<List<Order>> {
@Inject
private OrderDao orders;
public OrdersMo...
public class OrdersModel 

extends LoadableDetachableModel<List<Order>> {
@Inject
private OrderDao orders;
public OrdersMo...
public class OrdersPage extends WebPage {
public OrdersPage() {
add(new ListView<Order>("items", new OrdersModel()) {
@Ove...
public class OrdersPage extends WebPage {
public OrdersPage() {
}
}
public class OrdersPage extends WebPage {
public OrdersPage() {
add(new ListView<Order>("items", new OrdersModel()) {
});
...
public class OrdersPage extends WebPage {
public OrdersPage() {
add(new ListView<Order>("items", new OrdersModel()) {
@Ove...
public class OrdersPage extends WebPage {
public OrdersPage() {
add(new ListView<Order>("items", new OrdersModel()) {
@Ove...
Caused by: org.hibernate.LazyInitializationException: failed to lazily
initialize a collection of role: com.cheesr.entitie...
LazyInitializationException
failed to lazily initialize a collection of role:
com.cheesr.entities.Order.items, could not i...
LazyInitException: AARGH
Why and how to get rid of them
@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public class OrderDao implements Serializable {
public...
@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public class OrderDao implements Serializable {
public...
After dao.list() JPA session ends
@Entity
@Table(name = "Orders")
public class Order implements Serializable {
@Id
@GeneratedValue
private Long id;
private ...
@Entity
@Table(name = "Orders")
public class Order implements Serializable {
@Id
@GeneratedValue
private Long id;
private ...
Generates lazy proxies, resolved
upon request
public class OrdersPage extends WebPage {
public OrdersPage() {
add(new ListView<Order>("items", new OrdersModel()) {
@Ove...
public class OrdersPage extends WebPage {
public OrdersPage() {
add(new ListView<Order>("items", new OrdersModel()) {
@Ove...
getTotal() requests upon the
proxy: LazyInitException
Fix LazyInitExceptions
Extend transaction for whole request
(using a Servlet 3.0 @WebFilter)
@WebFilter(filterName = "Cheesr",
value = "/*",
initParams = {
@WebInitParam(
name = "applicationClassName",
value = "com....
@WebFilter(filterName = "Cheesr",
value = "/*",
initParams = {
@WebInitParam(
name = "applicationClassName",
value = "com....
Rolling back a transaction
When you use a reloading model

e.g. CheeseLoadableModel
And you use container managed transactions

@Transactional Wicket...
Form<Cheese> form = new Form<Cheese>("form", cheeseModel) {
@Override
protected void onSubmit() {
Cheese cheese = getModel...
"No news is good news..."
– Container Managed Transactions
Form<Cheese> form = new Form<Cheese>("form", cheeseModel) {
@Override
protected void onSubmit() {
Cheese cheese = getModel...
Form<Cheese> form = new Form<Cheese>("form", cheeseModel) {
@Override
protected void onSubmit() {
Cheese cheese = getModel...
@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public class TransactionBean {
@Resource
private Sessi...
When you use a reloading model

e.g. CheeseLoadableModel
And you use container managed transactions

@Transactional Wicket...
Injection (EJB, CDI)
Conversations (CDI)
JPA
Bean validation
Testing with Arquillian
Bean Validation
Single Point of Definition
Add dependencies
Add validation constraints
Configure Wicket
Add Validators to components
Steps
<!-- BEAN VALIDATION DEPENDENCIES -->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifac...
@Entity
@Table(name = "Orders")
public class Order implements Serializable {
@Id
@GeneratedValue
private Long id;
private ...
@Entity
@Table(name = "Orders")
public class Order implements Serializable {
@Id
@GeneratedValue
private Long id;
@NotNull...
@Entity
@Table(name = "Orders")
public class Order implements Serializable {
@Id
@GeneratedValue
private Long id;
@NotNull...
@Entity
@Table(name = "Orders")
public class Order implements Serializable {
@Id
@GeneratedValue
private Long id;
@NotNull...
public void init() {
super.init();
BeanValidationConfiguration beanValidation =
new BeanValidationConfiguration();
beanVal...
TextField<String> nameField =
new TextField<>("name", PropertyModel.of(this, "order.nam
form.add(nameField);
TextField<Str...
TextField<String> nameField =
new TextField<>("name", PropertyModel.of(this, "order.nam
nameField.add(new PropertyValidato...
TextField<String> nameField =
new TextField<>("name", PropertyModel.of(this, "order.nam
nameField.add(new PropertyValidato...
add wicket-bean-validation and
javax.validation:validation-api to project
configure BeanValidationConfiguration in init()
ad...
Injection (EJB, CDI)
Conversations (CDI)
JPA
Bean validation
Testing with Arquillian
Testing with WicketTester
public class TestIndex {
private WicketTester tester;
@Before
public void setUp() {
WicketApplication app = new WicketAppl...
• No bean manager
• No data source
• No persistence context
• No transactions
• No EJBs
NO
TESTS
Arquillian
No more mocks. No more container lifecycle
and deployment hassles. Just real tests!
Add Arquillian dependencies 

to project
Build deployable archive

with all necessary resources
Create a test case
Execute...
<!-- ARQUILLIAN DEPENDENCY FOR TESTING -->
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquilli...
<!-- ARQUILLIAN DEPENDENCY FOR TESTING -->
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquilli...
<!-- ARQUILLIAN DEPENDENCY FOR TESTING -->
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquilli...
Add Arquillian dependencies 

to project
Build deployable archive

with all necessary resources
Create a test case
Execute...
public class TestIndex {
private WicketTester tester;
@Before
public void setUp() {
WicketApplication app = new WicketAppl...
@RunWith(Arquillian.class)
public class TestIndex {
private WicketTester tester;
@Before
public void setUp() {
WicketAppli...
@RunWith(Arquillian.class)
public class TestIndex {
@Deployment
public static WebArchive deployment() {…}
private WicketTe...
@Deployment
public static WebArchive deployment() {
File[] dependencies =
Maven.configureResolver()
.workOffline()
.loadPo...
@Deployment
public static WebArchive deployment() {
File[] dependencies =
Maven.configureResolver()
.workOffline()
.loadPo...
6ea1e1a7-7f07-4318-8f70-ec7b8d5edbcc.war:
/WEB-INF/
/WEB-INF/lib/
/WEB-INF/lib/annotations-3.0.0.jar
/WEB-INF/lib/wicketst...
Add Arquillian dependencies 

to project
Build deployable archive

with all necessary resources
Create a test case
Execute...
Add Arquillian dependencies 

to project
Build deployable archive

with all necessary resources
Create a test case
Execute...
@Inject
private Conversation conversation;
@EJB
private CheeseDao cheeses;
@Inject
private Cart cart;
@Test
public void ad...
public void addCheeseToCart() {
}
public void addCheeseToCart() {
Cheese edam = cheeses.byCode("edam");
}
public void addCheeseToCart() {
Cheese edam = cheeses.byCode("edam");
tester.startPage(Index.class);
tester.assertRendered...
public void addCheeseToCart() {
Cheese edam = cheeses.byCode("edam");
tester.startPage(Index.class);
tester.assertRendered...
public void addCheeseToCart() {
Cheese edam = cheeses.byCode("edam");
tester.startPage(Index.class);
tester.assertRendered...
public void addCheeseToCart() {
Cheese edam = cheeses.byCode("edam");
tester.startPage(Index.class);
tester.assertRendered...
public void addCheeseToCart() {
Cheese edam = cheeses.byCode("edam");
tester.startPage(Index.class);
tester.assertRendered...
with Arquillian you can test Wicket pages with JPA, CDI,
EJB
add Arquillian dependencies to POM,
add arquillian.xml for co...
Injection (EJB, CDI)
Conversations (CDI)
JPA
Bean validation
Arquillian
Wicket and Java EE?
Questions?
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
Apache Wicket and Java EE sitting in a tree
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Apache Wicket and Java EE sitting in a tree

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Apache Wicket strives to enable developers to be very productive and craft maintainable web applications. Java EE also enables developers to achieve high productivity. So what happens when you combine both technologies? In this session Martijn Dashorst shows how to leverage the available Java EE technologies such as CDI, JPA, Bean Validation and JAX-RS in your Wicket applications.

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Apache Wicket and Java EE sitting in a tree

  1. 1. Apache Wicket
 and Java EE sitting in a tree Martijn Dashorst
 topicus onderwijs APACHE WICKET
  2. 2. Wicket and Java EE
  3. 3. servlet 3 JSF 2 EJB 3.1 JPA 2 JSP CDI JTA Bean Validation JAX-WS JAX-RPC JAXR SAAJ JAX-RS JAXB JMS JAAS JASPIC JACC JCA Java Mail JSR 88 JSR 77 RMI JNDI Java EE web profile
  4. 4. s/[JSF|JSP]/Wicket/🌍 Wicket's mission statement from 2004
  5. 5. servlet 3 JSF 2 EJB 3.1 JPA 2 JSP CDI JTA Bean Validation JAX-WS JAX-RPC JAXR SAAJ JAX-RS JAXB JMS JAAS JASPIC JACC JCA Java Mail JSR 88 JSR 77 RMI JNDI Java EE web profile
  6. 6. servlet 3 JSF 2 EJB 3.1 JPA 2 JSP CDI JTA Bean Validation JAX-WS JAX-RPC JAXR SAAJ JAX-RS JAXB JMS JAAS JASPIC JACC JCA Java Mail JSR 88 JSR 77 RMI JNDI Java EE web profile Arquillian
  7. 7. What is Wicket?
  8. 8. wicket |ˈwɪkɪt| noun 1 Cricket each of the sets of three stumps with two bails across the top at either end of the pitch, defended by a batsman. • the prepared strip of ground between two sets of stumps. when they inspected the wicket, they found it being rolled by some prisoners. • the dismissal of a batsman; each of ten dismissals regarded as marking a division of a side's innings: Darlington won by four wickets. 2 (also wicket door or wicket gate)a small door or gate, especially one beside or in a larger one. • N. Amer. an opening in a door or wall, often fitted with glass or a grille and used for selling tickets or a similar purpose. 3 N. Amer. a croquet hoop. PHRASES at the wicket Cricket 1 batting: the batsman remained at the wicket. 2 by the wicketkeeper: he was caught at the wicket chasing a wide one. keep wicket Cricket be a wicketkeeper. lose a wicket Cricket (of the batting side) have a batsman dismissed. the tourists lost their last seven wickets for 94. a sticky wicket Cricket a pitch that has been drying after rain and is difficult to bat on. • informal a tricky or awkward situation: I might be on a sticky wicket if I used that line. over the wicket Cricket (referring to which side of the wicket a bowler runs when bowling) to the left of the wicket if a right-handed bowler and the right of the wicket if a left-handed bowler. round the wicket Cricket (referring to which side of the wicket a bowler runs when bowling) to the right of the wicket if a right-handed bowler and the left of the wicket if a left-handed bowler. take a wicket Cricket (of a bowler or a fielding side) dismiss a batsman. ORIGIN Middle English (in the sense ‘small door or grille’): from Anglo-Norman French and Old Northern French wiket; origin uncertain, usually referred to the Germanic root of Old Norse vīkja ‘to turn, move’. Cricket senses date from the late 17th cent.
  9. 9. wicket |ˈwɪkɪt| noun 1 a component oriented, open source, Java web application framework
  10. 10. components everywhere
  11. 11. components everywhere
  12. 12. components everywhere
  13. 13. Injection (EJB, CDI) Conversations (CDI) JPA Bean validation Arquillian
  14. 14. Cheese Store Example
  15. 15. 1. Setup project 2. Add 'domain layer' 3. Add components First steps
  16. 16. 1. setup the project
  17. 17. Remove unnecessary files
  18. 18. Rename package to 'com.cheesr.web'
  19. 19. package com.cheesr.web; import org.apache.wicket.markup.html.WebPage; public class Index extends WebPage { public Index() { } }
  20. 20. package com.cheesr.web; import org.apache.wicket.markup.html.WebPage; import org.apache.wicket.protocol.http.WebApplica public class WicketApplication extends WebApplica @Override public Class<? extends WebPage> getHomePage() { return Index.class; } @Override public void init() { super.init(); } }
  21. 21. 2. Add 'domain model'
  22. 22. entities
  23. 23. package com.cheesr.dao; public class CheeseDao { }
  24. 24. package com.cheesr.dao; public class CheeseDao { public List<Cheese> getCheeses() { } }
  25. 25. package com.cheesr.dao; /*...*/ public class CheeseDao { public List<Cheese> getCheeses() { return asList(); } }
  26. 26. package com.cheesr.dao; /*...*/ public class CheeseDao { public List<Cheese> getCheeses() { return asList( new Cheese()); } }
  27. 27. package com.cheesr.dao; /*...*/ public class CheeseDao { public List<Cheese> getCheeses() { return asList( new Cheese( "Gouda", "Named after the Dutch town of Gouda, j", 1.99)); } }
  28. 28. package com.cheesr.dao; /*...*/ public class CheeseDao { public List<Cheese> getCheeses() { return asList( new Cheese( "Gouda", "Named after the Dutch town of Gouda, j", 1.99), new Cheese( "Edam", "This is a pressed, semi-hard to hard c", 2.99)); } }
  29. 29. package com.cheesr.dao; /*...*/ public class CheeseDao { public List<Cheese> getCheeses() { return asList( new Cheese( "Gouda", "Named after the Dutch town of Gouda, j", 1.99), new Cheese( "Edam", "This is a pressed, semi-hard to hard c", 2.99), new Cheese( "Camembert", "A very famous French cheese, Camembert", 3.99)); } }
  30. 30. package com.cheesr.dao; public class OrderDao { }
  31. 31. package com.cheesr.dao; public class OrderDao { public void save(Order order) { } }
  32. 32. package com.cheesr.dao; public class OrderDao { private List<Order> orders = new ArrayList<>(); public void save(Order order) { } }
  33. 33. package com.cheesr.dao; public class OrderDao { private List<Order> orders = new ArrayList<>(); public void save(Order order) { orders.add(order); } }
  34. 34. package com.cheesr.dao; public class OrderDao { private List<Order> orders = new ArrayList<>(); public void save(Order order) { orders.add(order); } public List<Order> list() { } }
  35. 35. package com.cheesr.dao; public class OrderDao { private List<Order> orders = new ArrayList<>(); public void save(Order order) { orders.add(order); } public List<Order> list() { return Collections.unmodifiableList(orders); } }
  36. 36. 3. Add components
  37. 37. <div class="cheese"> <h3>Gouda</h3> <p>Named after the Dutch town of Gouda, just ou <p> <span>$1.99</span> <a href="#">Add to cart</a> </p> </div>
  38. 38. <div wicket:id="cheese" class="cheese"> <h3 wicket:id="name">Gouda</h3> <p wicket:id="description">Named after the Dutc <p> €<span wicket:id="price">1.99</span> <a href="#">Add to cart</a> </p> </div>
  39. 39. public class Index extends WebPage { public Index() { } }
  40. 40. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() { } }
  41. 41. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); } }
  42. 42. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) { }); } }
  43. 43. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { } }); } }
  44. 44. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("description", c.getDescriptio item.add(new Label("price", c.getPrice())); } }); } }
  45. 45. <h3>Your Selection</h3> <table> <tbody> <tr> <td>Gouda</td> <td>€<span>1.99</span></td> <td><a href="#">remove</a></td> </tr> </tbody> <tfoot> <tr class="total"> <th>Total</th> <td>$1.99</td> <td>&nbsp;</td> </tr> </tfoot> </table>
  46. 46. <h3>Your Selection</h3> <table> <tbody> <tr wicket:id="item"> <td wicket:id="name">Gouda</td> <td>€<span wicket:id="price">1.99</span></td> <td><a href="#">remove</a></td> </tr> </tbody> <tfoot> <tr class="total"> <th>Total</th> <td>$1.99</td> <td>&nbsp;</td> </tr> </tfoot> </table>
  47. 47. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); } }
  48. 48. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); } }
  49. 49. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) { }); } }
  50. 50. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) { @Override protected void populateItem(ListItem<Cheese> item) { } }); } }
  51. 51. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); } }); } }
  52. 52. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("price", c.getPrice())); } }); } }
  53. 53. <div wicket:id="cheese" class="cheese"> <h3 wicket:id="name">Gouda</h3> <p wicket:id="description">Named after the Dutc <p> €<span wicket:id="price">1.99</span> <a href="#">Add to cart</a> </p> </div>
  54. 54. <div wicket:id="cheese" class="cheese"> <h3 wicket:id="name">Gouda</h3> <p wicket:id="description">Named after the Dutc <p> €<span wicket:id="price">1.99</span> <a wicket:id="price" href="#">Add to cart</a> </p> </div>
  55. 55. add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("description", c.getDescription())) item.add(new Label("price", c.getPrice())); } });
  56. 56. add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("description", c.getDescription())) item.add(new Label("price", c.getPrice())); item.add(new Link<Cheese>("price", item.getModel())); } });
  57. 57. add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("description", c.getDescription())) item.add(new Label("price", c.getPrice())); item.add(new Link<Cheese>("price", item.getModel()) { }); } });
  58. 58. add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("description", c.getDescription())) item.add(new Label("price", c.getPrice())); item.add(new Link<Cheese>("price", item.getModel()) { @Override public void onClick() { } }); } });
  59. 59. add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("description", c.getDescription())) item.add(new Label("price", c.getPrice())); item.add(new Link<Cheese>("price", item.getModel()) { @Override public void onClick() { Cheese cheese = getModelObject(); } }); } });
  60. 60. add(new ListView<Cheese>("cheese", cheeses) { @Override protected void populateItem(ListItem<Cheese> item) { Cheese c = item.getModelObject(); item.add(new Label("name", c.getName())); item.add(new Label("description", c.getDescription())) item.add(new Label("price", c.getPrice())); item.add(new Link<Cheese>("price", item.getModel()) { @Override public void onClick() { Cheese cheese = getModelObject(); cart.getItems().add(cheese); } }); } });
  61. 61. Injection (EJB, CDI) Conversations (CDI) JPA Bean validation Testing with Arquillian
  62. 62. Using EJBs
  63. 63. Add EJB dependencies 
 to project Make DAOs EJBs Inject DAOs Steps
  64. 64. <dependencies> <!-- EJB DEPENDENCIES --> <dependency> <groupId>org.jboss.spec.javax.ejb</groupId> <artifactId>jboss-ejb-api_3.2_spec</artifactId> <scope>provided</scope> </dependency> … </dependencies>
  65. 65. Add EJB dependencies 
 to project Make DAOs EJBs Inject DAOs Steps
  66. 66. public class CheeseDao { public List<Cheese> getCheeses() {…} } public class OrderDao { public void save(Order order) {…} public List<Order> list() {…} } public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() {…} }
  67. 67. public class CheeseDao { public List<Cheese> getCheeses() {…} } public class OrderDao { public void save(Order order) {…} public List<Order> list() {…} } public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() {…} }
  68. 68. @Stateless public class CheeseDao { public List<Cheese> getCheeses() {…} } public class OrderDao { public void save(Order order) {…} public List<Order> list() {…} } public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() {…} }
  69. 69. @Stateless public class CheeseDao { public List<Cheese> getCheeses() {…} } @Stateless public class OrderDao { public void save(Order order) {…} public List<Order> list() {…} } public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); public Index() {…} }
  70. 70. @Stateless public class CheeseDao { public List<Cheese> getCheeses() {…} } @Stateless public class OrderDao { public void save(Order order) {…} public List<Order> list() {…} } public class Index extends WebPage { private CheeseDao cheeseDao; public Index() {…} }
  71. 71. Add EJB dependencies 
 to project Make DAOs EJBs Inject DAOs Steps
  72. 72. @Stateless public class CheeseDao { public List<Cheese> getCheeses() {…} } @Stateless public class OrderDao { public void save(Order order) {…} public List<Order> list() {…} } public class Index extends WebPage { @EJB private CheeseDao cheeseDao; public Index() {…} }
  73. 73. 21:20:55,305 Processing weld deployment cheesr.war 21:20:55,313 JNDI bindings for session bean named CheeseDao in deployment unit deployment "cheesr.war" are as follows: java:global/cheesr/CheeseDao!com.cheesr.dao.CheeseDao java:app/cheesr/CheeseDao!com.cheesr.dao.CheeseDao java:module/CheeseDao!com.cheesr.dao.CheeseDao java:global/cheesr/CheeseDao java:app/cheesr/CheeseDao java:module/CheeseDao 21:20:55,335 Starting Services for CDI deployment: cheesr.war 21:20:55,340 Starting weld service for deployment cheesr.war
  74. 74. public class Index extends WebPage { @EJB private CheeseDao cheeseDao; private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) } }
  75. 75. public class Index extends WebPage { @EJB private CheeseDao cheeseDao; private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) } }
  76. 76. Wicket is unmanaged, container doesn't know about Pages, Components, etc.
  77. 77. <dependencies> <!-- EJB DEPENDENCIES --> <dependency> <groupId>org.jboss.spec.javax.ejb</groupId> <artifactId>jboss-ejb-api_3.2_spec</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.wicketstuff</groupId> <artifactId>wicketstuff-javaee-inject</artifactId> <version>6.17.0</version> </dependency> </dependencies>
  78. 78. public class WicketApplication extends WebApplication { @Override public Class< ? extends WebPage> getHomePage() { return Index.class; } @Override public void init() { super.init(); } }
  79. 79. public class WicketApplication extends WebApplication { @Override public Class< ? extends WebPage> getHomePage() { return Index.class; } @Override public void init() { super.init(); getComponentInstantiationListeners() .add(new JavaEEComponentInjector(this)); } }
  80. 80. • add EJB dependency and wicketstuff- javaee-inject dependency • make DAOs EJBs • configure component instantiation listener • now you can use @EJB injection
  81. 81. Using CDI for injection
  82. 82. <dependencies> <!-- CDI DEPENDENCIES --> <dependency> <groupId>javax.enterprise</groupId> <artifactId>cdi-api</artifactId> </dependency> <dependency> <groupId>org.apache.wicket</groupId> <artifactId>wicket-cdi-1.1</artifactId> <version>6.18.0</version> </dependency> </dependencies>
  83. 83. public class WicketApplication extends WebApplication { @Override public void init() { super.init(); } }
  84. 84. public class WicketApplication extends WebApplication { @Override public void init() { super.init(); CdiConfiguration cdiConfiguration = new CdiConfiguration(); cdiConfiguration.configure(this); } }
  85. 85. @ApplicationScoped public class MessageOfTheDay { public String getMessage() { return "What happens to the hole when the cheese is go } }
  86. 86. public class Index extends WebPage { @EJB private CheeseDao cheeseDao; public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) } }
  87. 87. public class Index extends WebPage { @EJB private CheeseDao cheeseDao; @Inject private MessageOfTheDay message; public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) } }
  88. 88. public class Index extends WebPage { @EJB private CheeseDao cheeseDao; @Inject private MessageOfTheDay message; public Index() { add(new Label("message", message.getMessage())); List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) } }
  89. 89. Injecting in non-managed objects
  90. 90. public class MessageModel extends LoadableDetachableModel<String> { @Inject private MessageOfTheDay messages; @Override protected String load() { return messages.getMessage(); } }
  91. 91. Caused by: java.lang.NullPointerException at com.cheesr.web.MessageModel.load(MessageModel.java:15) [:] at com.cheesr.web.MessageModel.load(MessageModel.java:1) [:] at org.apache.wicket.model.LoadableDetachableModel.getObject( at org.apache.wicket.Component.getDefaultModelObject(Componen ... 55 more
  92. 92. public class MessageModel extends LoadableDetachableModel<String> { @Inject private MessageOfTheDay messages; @Override protected String load() { return messages.getMessage(); } }
  93. 93. public class MessageModel extends LoadableDetachableModel<String> { @Inject private MessageOfTheDay messages; public MessageModel() { NonContextual.of(MessageModel.class).inject(this); } @Override protected String load() { return messages.getMessage(); } }
  94. 94. • Add wicket-cdi-1.1 and javax.cdi-api • Configure Wicket's CdiConfiguration • Use @Inject injection • Use NonContextual in non-managed objects
  95. 95. Injection (EJB, CDI) Conversations (CDI) JPA Bean validation Testing with Arquillian
  96. 96. 4. Navigate to Checkout 5. Implement Checkout 6. Make Cart Conversation Scoped Next steps
  97. 97. 4. navigate to checkout
  98. 98. <div id="cart"> <h3>Your Selection</h3> <table> <tbody>…</tbody> <tfoot>…</tfoot> </table> <input type="button" value="Check out" /> </div>
  99. 99. <div id="cart"> <h3>Your Selection</h3> <table> <tbody>…</tbody> <tfoot>…</tfoot> </table> <input wicket:id="checkout" type="button" value="Check ou </div>
  100. 100. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) } }
  101. 101. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) add(new Link<Void>("checkout") {}); } }
  102. 102. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) add(new Link<Void>("checkout") { @Override public void onClick() { } }); } }
  103. 103. public class Index extends WebPage { private CheeseDao cheeseDao = new CheeseDao(); private Cart cart = new Cart(); public Index() { List<Cheese> cheeses = cheeseDao.getCheeses(); add(new ListView<Cheese>("cheese", cheeses) {…}); add(new ListView<Cheese>("item", cart.getItems()) {…}) add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } }
  104. 104. public class CheckoutPage extends WebPage { private Cart cart = new Cart(); public CheckoutPage(Cart cart) { this.cart = cart; } }
  105. 105. 5. implement checkout
  106. 106. <form > <h3>Check out</h3> <p>Please enter your billing address.</p> <table> <tr> <th>Name</th> <td><input type="text" /></td> </tr> <tr> <th>Street</th> <td><input type="text" /></td> </tr> <tr> <th>Zipcode</th> <td><input type="text" /></td> </tr> <tr> <th>City</th> <td><input type="text" /></td> </tr>
  107. 107. <form wicket:id="form"> <h3>Check out</h3> <p>Please enter your billing address.</p> <table> <tr> <th>Name</th> <td><input type="text" /></td> </tr> <tr> <th>Street</th> <td><input type="text" /></td> </tr> <tr> <th>Zipcode</th> <td><input type="text" /></td> </tr> <tr> <th>City</th> <td><input type="text" /></td> </tr>
  108. 108. public class CheckoutPage extends WebPage { private Cart cart; public CheckoutPage(Cart cart) { this.cart = cart; } }
  109. 109. public class CheckoutPage extends WebPage { private Cart cart; public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") {}; add(form); } }
  110. 110. public class CheckoutPage extends WebPage { private Cart cart; public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { } }; add(form); } }
  111. 111. public class CheckoutPage extends WebPage { private Cart cart; private Order order = new Order(); public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { } }; add(form); } }
  112. 112. public class CheckoutPage extends WebPage { private Cart cart; private Order order = new Order(); @EJB private OrderDao orders; public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { } }; add(form); } }
  113. 113. public class CheckoutPage extends WebPage { … public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { } }; add(form); } }
  114. 114. public class CheckoutPage extends WebPage { … public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) { } } }; add(form); } }
  115. 115. public class CheckoutPage extends WebPage { … public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) { OrderItem item = new OrderItem(); item.setOrder(order); item.setCheese(cheese); order.getItems().add(item); } } }; add(form); } }
  116. 116. public class CheckoutPage extends WebPage { … public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) { OrderItem item = new OrderItem(); item.setOrder(order); item.setCheese(cheese); order.getItems().add(item); } orders.save(order); } }; add(form); } }
  117. 117. 6. make Cart 
 Conversation Scoped
  118. 118. What does the navigation between shopping and checkout look like?
  119. 119. public class Index extends WebPage { public Index() { … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } } public class CheckoutPage extends WebPage { private Cart cart; public CheckoutPage(Cart cart) { this.cart = cart; … } }
  120. 120. public class Index extends WebPage { public Index() { … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } } public class CheckoutPage extends WebPage { private Cart cart; public CheckoutPage(Cart cart) { this.cart = cart; … } }
  121. 121. public class Index extends WebPage { public Index() { … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } } public class CheckoutPage extends WebPage { private Cart cart; public CheckoutPage(Cart cart) { this.cart = cart; … } } Cart should be
 conversation scoped
  122. 122. public class Cart implements Serializable { public Cart() { } public void setItems(List<Cheese> items) { this.items = items; } public List<Cheese> getItems() { return items; } public double getTotal() { return items.stream().mapToDouble(Cheese::getPrice).su } }
  123. 123. @ConversationScoped public class Cart implements Serializable { private List<Cheese> items = new ArrayList<>(); public Cart() { } public void setItems(List<Cheese> items) { this.items = items; } public List<Cheese> getItems() { return items; } public double getTotal() { return items.stream().mapToDouble(Cheese::getPrice).su } }
  124. 124. Let's get this conversation started

  125. 125. public class Index extends WebPage { … public Index() { … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } }
  126. 126. public class Index extends WebPage { … @Inject private Conversation shopping; public Index() { … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } }
  127. 127. public class Index extends WebPage { … @Inject private Conversation shopping; public Index() { … shopping.begin(); … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } }
  128. 128. public class Index extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart = new Cart(); public Index() { … shopping.begin(); … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } }
  129. 129. public class Index extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public Index() { … shopping.begin(); … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage(cart)); } }); } }
  130. 130. public class Index extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public Index() { … shopping.begin(); … add(new Link<Void>("checkout") { @Override public void onClick() { setResponsePage(new CheckoutPage()); } }); } }
  131. 131. public class CheckoutPage extends WebPage { @EJB private OrderDao orders; private Order order = new Order(); private Cart cart; public CheckoutPage(Cart cart) { this.cart = cart; Form<Void> form = new Form<Void>("form") {…}; add(form); } }
  132. 132. public class CheckoutPage extends WebPage { @EJB private OrderDao orders; private Order order = new Order(); private Cart cart; public CheckoutPage() { this.cart = cart; Form<Void> form = new Form<Void>("form") {…}; add(form); } }
  133. 133. public class CheckoutPage extends WebPage { @EJB private OrderDao orders; private Order order = new Order(); private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") {…}; add(form); } }
  134. 134. public class CheckoutPage extends WebPage { @EJB private OrderDao orders; private Order order = new Order(); @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") {…}; add(form); } }
  135. 135. Let's end this conversation

  136. 136. public class CheckoutPage extends WebPage { … @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") {…}; add(form); } }
  137. 137. public class CheckoutPage extends WebPage { … @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) {…} orders.save(order); } }; add(form); } } end conversation here...
  138. 138. public class CheckoutPage extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) {} orders.save(order); } }; add(form); } }
  139. 139. public class CheckoutPage extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) {} orders.save(order); shopping.end(); } }; add(form); } }
  140. 140. localhost:8080/cheesr/?0&cid=1 ⟳
  141. 141. public class CheckoutPage extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) {} orders.save(order); shopping.end(); } }; add(form); } }
  142. 142. public class CheckoutPage extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) {} orders.save(order); shopping.end(); } }; add(form); } }
  143. 143. public class CheckoutPage extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) {} orders.save(order); shopping.end(); } }; add(form); } }
  144. 144. public class CheckoutPage extends WebPage { … @Inject private Conversation shopping; @Inject private Cart cart; public CheckoutPage() { Form<Void> form = new Form<Void>("form") { @Override protected void onSubmit() { for (Cheese cheese : cart.getItems()) {} orders.save(order); shopping.end(); setResponsePage(Index.class); } }; add(form); }
  145. 145. • Add wicket-cdi-1.1 and javax.cdi-api • Configure Wicket's CdiConfiguration • Use @Inject injection and @ConversationScoped • Use NonContextual in non-managed objects
  146. 146. Injection (EJB, CDI) Conversations (CDI) JPA Bean validation Testing with Arquillian
  147. 147. Cheese, Order, OrderItem now @Entity Order → OrderItem
 @OneToMany(fetchType=LAZY) OrderItem → Cheese, OrderItem → Order
 @ManyToOne(optional=false) CheeseDao, OrderDao now
 @Stateless
 @TransactionAttribute(REQUIRED)
  148. 148. A refreshing model A model that reloads data from DB 
 for every render
  149. 149. public class OrdersModel {
 }
  150. 150. public class OrdersModel 
 extends LoadableDetachableModel<List<Order>> { }
  151. 151. public class OrdersModel 
 extends LoadableDetachableModel<List<Order>> { @Override protected List<Order> load() { } }
  152. 152. public class OrdersModel 
 extends LoadableDetachableModel<List<Order>> { @Override protected List<Order> load() { return orders.list(); } }
  153. 153. public class OrdersModel 
 extends LoadableDetachableModel<List<Order>> { @Inject private OrderDao orders; @Override protected List<Order> load() { return orders.list(); } }
  154. 154. public class OrdersModel 
 extends LoadableDetachableModel<List<Order>> { @Inject private OrderDao orders; public OrdersModel() { } @Override protected List<Order> load() { return orders.list(); } }
  155. 155. public class OrdersModel 
 extends LoadableDetachableModel<List<Order>> { @Inject private OrderDao orders; public OrdersModel() { NonContextual.of(OrdersModel.class).inject(this); } @Override protected List<Order> load() { return orders.list(); } }
  156. 156. public class OrdersPage extends WebPage { public OrdersPage() { add(new ListView<Order>("items", new OrdersModel()) { @Override protected void populateItem(ListItem<Order> item) { Order o = item.getModelObject(); item.add(new Label("id", o.getId())); item.add(new Label("name", o.getName())); item.add(new Label("total", o.getTotal())); } }); } }
  157. 157. public class OrdersPage extends WebPage { public OrdersPage() { } }
  158. 158. public class OrdersPage extends WebPage { public OrdersPage() { add(new ListView<Order>("items", new OrdersModel()) { }); } }
  159. 159. public class OrdersPage extends WebPage { public OrdersPage() { add(new ListView<Order>("items", new OrdersModel()) { @Override protected void populateItem(ListItem<Order> item) { } }); } }
  160. 160. public class OrdersPage extends WebPage { public OrdersPage() { add(new ListView<Order>("items", new OrdersModel()) { @Override protected void populateItem(ListItem<Order> item) { Order o = item.getModelObject(); item.add(new Label("id", o.getId())); item.add(new Label("name", o.getName())); item.add(new Label("total", o.getTotal())); } }); } }
  161. 161. Caused by: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.cheesr.entities.Order.items, could not initialize proxy - no Session at org.hibernate.collection.internal.AbstractPersistentCollection.throw at org.hibernate.collection.internal.AbstractPersistentCollection.withT at org.hibernate.collection.internal.AbstractPersistentCollection.initi at org.hibernate.collection.internal.AbstractPersistentCollection.read( at org.hibernate.collection.internal.PersistentBag.iterator(PersistentB at java.util.Spliterators$IteratorSpliterator.estimateSize(Spliterators at java.util.Spliterator.getExactSizeIfKnown(Spliterator.java:408) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:511 at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.j at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.jav at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234 at java.util.stream.DoublePipeline.collect(DoublePipeline.java:476) at java.util.stream.DoublePipeline.sum(DoublePipeline.java:388) at com.cheesr.entities.Order.getTotal(Order.java:94) at com.cheesr.web.OrdersPage$1.populateItem(OrdersPage.java:22) at org.apache.wicket.markup.html.list.ListView.onPopulate(ListView.java at org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(Ab at org.apache.wicket.Component.internalBeforeRender(Component.java:949) at org.apache.wicket.Component.beforeRender(Component.java:1017) at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupConta ... 50 more
  162. 162. LazyInitializationException failed to lazily initialize a collection of role: com.cheesr.entities.Order.items, could not initialize proxy - no Session
  163. 163. LazyInitException: AARGH Why and how to get rid of them
  164. 164. @Stateless @TransactionAttribute(TransactionAttributeType.REQUIRED) public class OrderDao implements Serializable { public void save(Order order) {…} public List<Order> list() {…} }
  165. 165. @Stateless @TransactionAttribute(TransactionAttributeType.REQUIRED) public class OrderDao implements Serializable { public void save(Order order) {…} public List<Order> list() {…} }
  166. 166. After dao.list() JPA session ends
  167. 167. @Entity @Table(name = "Orders") public class Order implements Serializable { @Id @GeneratedValue private Long id; private String name; private String street; private String zipcode; private String city; private String country; @OneToMany(fetch = FetchType.LAZY, mappedBy = "order", cascade = CascadeType.ALL, orphanRemoval = true) private List<OrderItem> items = new ArrayList<>(); public Long getId() { return id;
  168. 168. @Entity @Table(name = "Orders") public class Order implements Serializable { @Id @GeneratedValue private Long id; private String name; private String street; private String zipcode; private String city; private String country; @OneToMany(fetch = FetchType.LAZY, mappedBy = "order", cascade = CascadeType.ALL, orphanRemoval = true) private List<OrderItem> items = new ArrayList<>(); public Long getId() { return id;
  169. 169. Generates lazy proxies, resolved upon request
  170. 170. public class OrdersPage extends WebPage { public OrdersPage() { add(new ListView<Order>("items", new OrdersModel()) { @Override protected void populateItem(ListItem<Order> item) { Order o = item.getModelObject(); item.add(new Label("id", o.getId())); item.add(new Label("name", o.getName())); item.add(new Label("total", o.getTotal())); } }); } }
  171. 171. public class OrdersPage extends WebPage { public OrdersPage() { add(new ListView<Order>("items", new OrdersModel()) { @Override protected void populateItem(ListItem<Order> item) { Order o = item.getModelObject(); item.add(new Label("id", o.getId())); item.add(new Label("name", o.getName())); item.add(new Label("total", o.getTotal())); } }); } }
  172. 172. getTotal() requests upon the proxy: LazyInitException
  173. 173. Fix LazyInitExceptions Extend transaction for whole request (using a Servlet 3.0 @WebFilter)
  174. 174. @WebFilter(filterName = "Cheesr", value = "/*", initParams = { @WebInitParam( name = "applicationClassName", value = "com.cheesr.web.WicketApplication"), @WebInitParam( name = "filterMappingUrlPattern", value = "/*") }) public class CheesrFilter extends WicketFilter { @Override public void doFilter(ServletRequest req, ServletResponse super.doFilter(request, response, chain); } }
  175. 175. @WebFilter(filterName = "Cheesr", value = "/*", initParams = { @WebInitParam( name = "applicationClassName", value = "com.cheesr.web.WicketApplication"), @WebInitParam( name = "filterMappingUrlPattern", value = "/*") }) public class CheesrFilter extends WicketFilter { @Transactional @Override public void doFilter(ServletRequest req, ServletResponse super.doFilter(request, response, chain); } }
  176. 176. Rolling back a transaction
  177. 177. When you use a reloading model
 e.g. CheeseLoadableModel And you use container managed transactions
 @Transactional WicketFilter Then be careful of unwanted modifications
  178. 178. Form<Cheese> form = new Form<Cheese>("form", cheeseModel) { @Override protected void onSubmit() { Cheese cheese = getModelObject(); if (cheese.getPrice() < 1) { error("Price must be €1,- or higher"); } else { cheeseDao.save(cheese); setResponsePage(Index.class); } } }; add(form);
  179. 179. "No news is good news..." – Container Managed Transactions
  180. 180. Form<Cheese> form = new Form<Cheese>("form", cheeseModel) { @Override protected void onSubmit() { Cheese cheese = getModelObject(); if (cheese.getPrice() < 1) { error("Price must be €1,- or higher"); } else { cheeseDao.save(cheese); setResponsePage(Index.class); } } }; add(form);
  181. 181. Form<Cheese> form = new Form<Cheese>("form", cheeseModel) { @Override protected void onSubmit() { Cheese cheese = getModelObject(); if (cheese.getPrice() < 1) { transactionBean.setTransactionRollbackOnly(); error("Price must be €1,- or higher"); } else { cheeseDao.save(cheese); setResponsePage(Index.class); } } }; add(form);
  182. 182. @Stateless @TransactionAttribute(TransactionAttributeType.REQUIRED) public class TransactionBean { @Resource private SessionContext context; public void setTransactionRollbackOnly() { context.setRollbackOnly(); } }
  183. 183. When you use a reloading model
 e.g. CheeseLoadableModel And you use container managed transactions
 @Transactional WicketFilter Then be careful of unwanted modifications
 and rollback the transaction
  184. 184. Injection (EJB, CDI) Conversations (CDI) JPA Bean validation Testing with Arquillian
  185. 185. Bean Validation Single Point of Definition
  186. 186. Add dependencies Add validation constraints Configure Wicket Add Validators to components Steps
  187. 187. <!-- BEAN VALIDATION DEPENDENCIES --> <dependency> <groupId>javax.validation</groupId> <artifactId>validation-api</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.apache.wicket</groupId> <artifactId>wicket-bean-validation</artifactId> </dependency>
  188. 188. @Entity @Table(name = "Orders") public class Order implements Serializable { @Id @GeneratedValue private Long id; private String name; private String street; private String zipcode; private String city; private String country; @OneToMany(fetch = FetchType.LAZY, mappedBy = "order", ca private List<OrderItem> items = new ArrayList<>();
  189. 189. @Entity @Table(name = "Orders") public class Order implements Serializable { @Id @GeneratedValue private Long id; @NotNull private String name; private String street; private String zipcode; private String city; private String country; @OneToMany(fetch = FetchType.LAZY, mappedBy = "order", ca private List<OrderItem> items = new ArrayList<>();
  190. 190. @Entity @Table(name = "Orders") public class Order implements Serializable { @Id @GeneratedValue private Long id; @NotNull private String name; @Size(min = 3, max = 20) @NotNull private String street; private String zipcode; private String city; private String country;
  191. 191. @Entity @Table(name = "Orders") public class Order implements Serializable { @Id @GeneratedValue private Long id; @NotNull private String name; @Size(min = 3, max = 20) @NotNull private String street; @Pattern(regexp = "d{4} [A-Z]{2}") @NotNull private String zipcode; private String city;
  192. 192. public void init() { super.init(); BeanValidationConfiguration beanValidation = new BeanValidationConfiguration(); beanValidation.configure(this); CdiConfiguration cdiConfiguration = new CdiConfiguration(); cdiConfiguration .setPropagation(ConversationPropagation.ALL); cdiConfiguration.configure(this); getComponentInstantiationListeners().add( new JavaEEComponentInjector(this, new WildflyWicketJndiNamingStrategy())); mountPage("/checkout", CheckoutPage.class); mountPage("/orders", OrdersPage.class); }
  193. 193. TextField<String> nameField = new TextField<>("name", PropertyModel.of(this, "order.nam form.add(nameField); TextField<String> streetField = new TextField<>("street", PropertyModel.of(this, "order.s form.add(streetField);
  194. 194. TextField<String> nameField = new TextField<>("name", PropertyModel.of(this, "order.nam nameField.add(new PropertyValidator<>()); form.add(nameField); TextField<String> streetField = new TextField<>("street", PropertyModel.of(this, "order.s form.add(streetField);
  195. 195. TextField<String> nameField = new TextField<>("name", PropertyModel.of(this, "order.nam nameField.add(new PropertyValidator<>()); form.add(nameField); TextField<String> streetField = new TextField<>("street", PropertyModel.of(this, "order.s streetField.add(new PropertyValidator<>()); form.add(streetField);
  196. 196. add wicket-bean-validation and javax.validation:validation-api to project configure BeanValidationConfiguration in init() add PropertyValidator to fields
  197. 197. Injection (EJB, CDI) Conversations (CDI) JPA Bean validation Testing with Arquillian
  198. 198. Testing with WicketTester
  199. 199. public class TestIndex { private WicketTester tester; @Before public void setUp() { WicketApplication app = new WicketApplication(); tester = new WicketTester(app); } @Test public void homepageRendersSuccessfully() { tester.startPage(Index.class); tester.assertRenderedPage(Index.class); } }
  200. 200. • No bean manager • No data source • No persistence context • No transactions • No EJBs NO TESTS
  201. 201. Arquillian No more mocks. No more container lifecycle and deployment hassles. Just real tests!
  202. 202. Add Arquillian dependencies 
 to project Build deployable archive
 with all necessary resources Create a test case Execute test case with Arquillian Steps
  203. 203. <!-- ARQUILLIAN DEPENDENCY FOR TESTING --> <dependency> <groupId>org.jboss.arquillian.junit</groupId> <artifactId>arquillian-junit-container</artifactId> <scope>test</scope> </dependency>
  204. 204. <!-- ARQUILLIAN DEPENDENCY FOR TESTING --> <dependency> <groupId>org.jboss.arquillian.junit</groupId> <artifactId>arquillian-junit-container</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.jboss.shrinkwrap.descriptors</groupId> <artifactId>shrinkwrap-descriptors-impl-javaee</artifact <scope>test</scope> </dependency>
  205. 205. <!-- ARQUILLIAN DEPENDENCY FOR TESTING --> <dependency> <groupId>org.jboss.arquillian.junit</groupId> <artifactId>arquillian-junit-container</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.jboss.shrinkwrap.descriptors</groupId> <artifactId>shrinkwrap-descriptors-impl-javaee</artifact <scope>test</scope> </dependency> <dependency> <groupId>org.jboss.shrinkwrap.resolver</groupId> <artifactId>shrinkwrap-resolver-impl-maven</artifactId> <scope>test</scope> </dependency>
  206. 206. Add Arquillian dependencies 
 to project Build deployable archive
 with all necessary resources Create a test case Execute test case with Arquillian Steps
  207. 207. public class TestIndex { private WicketTester tester; @Before public void setUp() { WicketApplication app = new WicketApplication(); tester = new WicketTester(app); } @Test public void homepageRendersSuccessfully() { tester.startPage(Index.class); tester.assertRenderedPage(Index.class); } }
  208. 208. @RunWith(Arquillian.class) public class TestIndex { private WicketTester tester; @Before public void setUp() { WicketApplication app = new WicketApplication(); tester = new WicketTester(app); } @Test public void homepageRendersSuccessfully() { tester.startPage(Index.class); tester.assertRenderedPage(Index.class); } }
  209. 209. @RunWith(Arquillian.class) public class TestIndex { @Deployment public static WebArchive deployment() {…} private WicketTester tester; @Before public void setUp() { WicketApplication app = new WicketApplication(); tester = new WicketTester(app); } @Test public void homepageRendersSuccessfully() { tester.startPage(Index.class); tester.assertRenderedPage(Index.class); } }
  210. 210. @Deployment public static WebArchive deployment() { File[] dependencies = Maven.configureResolver() .workOffline() .loadPomFromFile("pom.xml") .importCompileAndRuntimeDependencies() .resolve() .withTransitivity() .as(File.class); }
  211. 211. @Deployment public static WebArchive deployment() { File[] dependencies = Maven.configureResolver() .workOffline() .loadPomFromFile("pom.xml") .importCompileAndRuntimeDependencies() .resolve() .withTransitivity() .as(File.class); WebArchive war = ShrinkWrap .create(WebArchive.class) .addAsResource(new File("target/classes"), "") .addAsLibraries(dependencies) .addAsWebInfResource( new File("src/main/webapp/WEB-INF/beans.xml")) .addAsWebInfResource( new File("src/main/webapp/WEB-INF/cheesr-ds.xml") return war; }
  212. 212. 6ea1e1a7-7f07-4318-8f70-ec7b8d5edbcc.war: /WEB-INF/ /WEB-INF/lib/ /WEB-INF/lib/annotations-3.0.0.jar /WEB-INF/lib/wicketstuff-javaee-inject-6.17.0.jar /WEB-INF/lib/javax.inject-1.jar /WEB-INF/lib/wicket-cdi-1.1-6.18.0.jar /WEB-INF/lib/cglib-2.2.2.jar /WEB-INF/lib/fest-util-1.1.6.jar /WEB-INF/lib/wicket-ioc-6.18.0.jar /WEB-INF/lib/wicket-bean-validation-6.18.0.jar /WEB-INF/lib/wicket-request-6.18.0.jar /WEB-INF/lib/log4j-1.2.17.jar /WEB-INF/lib/asm-3.3.1.jar /WEB-INF/lib/fest-assert-1.4.jar /WEB-INF/lib/validation-api-1.1.0.Final.jar /WEB-INF/lib/slf4j-log4j12-1.7.7.jar /WEB-INF/lib/slf4j-api-1.7.7.jar /WEB-INF/lib/jcl-over-slf4j-1.7.7.jar /WEB-INF/lib/wicket-core-6.18.0.jar /WEB-INF/lib/wicket-util-6.18.0.jar /WEB-INF/cheesr-ds.xml /WEB-INF/classes/ /WEB-INF/classes/wildfly-doesnt-need-log4j.properties /WEB-INF/classes/META-INF/ /WEB-INF/classes/META-INF/persistence.xml /WEB-INF/classes/com/ /WEB-INF/classes/com/cheesr/ /WEB-INF/classes/com/cheesr/domain/ /WEB-INF/classes/com/cheesr/domain/Cart.class /WEB-INF/classes/com/cheesr/domain/MessageOfTheDay.class /WEB-INF/classes/com/cheesr/web/ /WEB-INF/classes/com/cheesr/web/CheckoutPage$2.class /WEB-INF/classes/com/cheesr/web/Index$2$1.class /WEB-INF/classes/com/cheesr/web/OrdersPage.class /WEB-INF/classes/com/cheesr/web/WicketApplication.class /WEB-INF/classes/com/cheesr/web/Index$1$1.class /WEB-INF/classes/com/cheesr/web/Index.html /WEB-INF/classes/com/cheesr/web/WicketApplication$WildflyWicketJndiNamingStrategy.class /WEB-INF/classes/com/cheesr/web/Index$2.class /WEB-INF/classes/com/cheesr/web/CheckoutPage.class /WEB-INF/classes/com/cheesr/web/CheckoutPage.html /WEB-INF/classes/com/cheesr/web/Index.class /WEB-INF/classes/com/cheesr/web/CheesrFilter.class /WEB-INF/classes/com/cheesr/web/MessageModel.class /WEB-INF/classes/com/cheesr/web/Index$3.class /WEB-INF/classes/com/cheesr/web/OrdersModel.class
  213. 213. Add Arquillian dependencies 
 to project Build deployable archive
 with all necessary resources Create a test case Execute test case with Arquillian Steps
  214. 214. Add Arquillian dependencies 
 to project Build deployable archive
 with all necessary resources Create a test case Execute test case with Arquillian Steps
  215. 215. @Inject private Conversation conversation; @EJB private CheeseDao cheeses; @Inject private Cart cart; @Test public void addCheeseToCart() { }
  216. 216. public void addCheeseToCart() { }
  217. 217. public void addCheeseToCart() { Cheese edam = cheeses.byCode("edam"); }
  218. 218. public void addCheeseToCart() { Cheese edam = cheeses.byCode("edam"); tester.startPage(Index.class); tester.assertRenderedPage(Index.class); }
  219. 219. public void addCheeseToCart() { Cheese edam = cheeses.byCode("edam"); tester.startPage(Index.class); tester.assertRenderedPage(Index.class); tester.assertModelValue("cheese:1", edam); }
  220. 220. public void addCheeseToCart() { Cheese edam = cheeses.byCode("edam"); tester.startPage(Index.class); tester.assertRenderedPage(Index.class); tester.assertModelValue("cheese:1", edam); tester.clickLink("cheese:1:add"); assertThat(cart.getItems().size(), is(1)); tester.assertModelValue("item:0", edam); }
  221. 221. public void addCheeseToCart() { Cheese edam = cheeses.byCode("edam"); tester.startPage(Index.class); tester.assertRenderedPage(Index.class); tester.assertModelValue("cheese:1", edam); tester.clickLink("cheese:1:add"); assertThat(cart.getItems().size(), is(1)); tester.assertModelValue("item:0", edam); tester.clickLink("cheese:1:add"); assertThat(cart.getItems().size(), is(2)); assertThat(cart.getItems().get(0), is(edam)); assertThat(cart.getItems().get(1), is(edam)); }
  222. 222. public void addCheeseToCart() { Cheese edam = cheeses.byCode("edam"); tester.startPage(Index.class); tester.assertRenderedPage(Index.class); tester.assertModelValue("cheese:1", edam); tester.clickLink("cheese:1:add"); assertThat(cart.getItems().size(), is(1)); tester.assertModelValue("item:0", edam); tester.clickLink("cheese:1:add"); assertThat(cart.getItems().size(), is(2)); assertThat(cart.getItems().get(0), is(edam)); assertThat(cart.getItems().get(1), is(edam)); tester.clickLink("checkout"); tester.assertRenderedPage(CheckoutPage.class); }
  223. 223. with Arquillian you can test Wicket pages with JPA, CDI, EJB add Arquillian dependencies to POM, add arquillian.xml for container connection create a deployment write and run your tests
  224. 224. Injection (EJB, CDI) Conversations (CDI) JPA Bean validation Arquillian
  225. 225. Wicket and Java EE?
  226. 226. Questions?

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