index-group=Unrevised type=page status=published title=CDI @ApplicationScoped

This example show the use of `@ApplicationScoped` annotation for injected objects. An object
which is defined as `@ApplicationScoped` is created once for the duration of the application.

# Example

This example depicts a similar scenario to cdi-request-scope. A restaurant guest orders
a soup from the waiter. The waiter then delivers the soup back to the guest. Another
guest can order the same soup that was ordered by the previous client - this is where
the application scope is used. 

## Waiter

The `Waiter` session bean receives a request from the test class via the `orderSoup()` method
and sets the name for the `soup` field. The `orderWhatTheOtherGuyHad()` method returns
the name of the `soup` field.

    @Stateless
    public class Waiter {

        @Inject
        public Soup soup;

        public String orderSoup(String name){
            soup.setName(name);
            return soup.getName();
        }

        public String orderWhatTheOtherGuyHad() {
            String name = soup.getName();
            return name;
        }
    }

## Soup

The `Soup` class is an injectable POJO, defined as `@ApplicationScoped`. This means that an instance
will be created only once for the duration of the whole application. Try changing the `@ApplicationScoped`
annotation to `@RequestScoped` and see what happens.

    @ApplicationScoped
    public class Soup {

        private String name = "Soup of the day";

        @PostConstruct
        public void afterCreate() {
            System.out.println("Soup created");
        }

        public String getName() {
            return name;
        }

        public void setName(String name){
            this.name = name;
        }
    }


# Test Case

This is the entry class for this example. First a soup is ordered via `orderSoup()` method.
This initiates the `soup` field. Next, `orderWhatTheOtherGuyHad()` method returns the soup
from the application context.

    public class RestaurantTest {

        private static String TOMATO_SOUP = "Tomato Soup";
        private EJBContainer container;

        @EJB
        private Waiter joe;

        @Before
        public void startContainer() throws Exception {
            container = EJBContainer.createEJBContainer();
            container.getContext().bind("inject", this);
        }

        @Test
        public void orderSoup(){
            String someSoup = joe.orderSoup(TOMATO_SOUP);
            assertEquals(TOMATO_SOUP, someSoup);

            String sameSoup = joe.orderWhatTheOtherGuyHad();
            assertEquals(TOMATO_SOUP, sameSoup);
        }

        @After
        public void closeContainer() throws Exception {
            container.close();
        }
    }

# Running

In the output you can see that there is just one `Soup` instance created - one for
the whole application.

    -------------------------------------------------------
     T E S T S
    -------------------------------------------------------
    Running org.superbiz.cdi.applicationscope.RestaurantTest
    Apache OpenEJB 7.0.0-SNAPSHOT    build: 20111224-11:09
    http://tomee.apache.org/
    INFO - openejb.home = C:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope
    INFO - openejb.base = C:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope
    INFO - Using 'javax.ejb.embeddable.EJBContainer=true'
    INFO - Configuring Service(id=Default Security Service, type=SecurityService, provider-id=Default Security Service)
    INFO - Configuring Service(id=Default Transaction Manager, type=TransactionManager, provider-id=Default Transaction Manager)
    INFO - Found EjbModule in classpath: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope\target\classes
    INFO - Beginning load: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope\target\classes
    INFO - Configuring enterprise application: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope
    INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
    INFO - Auto-creating a container for bean cdi-application-scope.Comp: Container(type=MANAGED, id=Default Managed Container)
    INFO - Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)
    INFO - Auto-creating a container for bean Waiter: Container(type=STATELESS, id=Default Stateless Container)
    INFO - Enterprise application "c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope" loaded.
    INFO - Assembling app: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope
    INFO - Jndi(name="java:global/cdi-application-scope/Waiter!org.superbiz.cdi.applicationscope.Waiter")
    INFO - Jndi(name="java:global/cdi-application-scope/Waiter")
    INFO - Created Ejb(deployment-id=Waiter, ejb-name=Waiter, container=Default Stateless Container)
    INFO - Started Ejb(deployment-id=Waiter, ejb-name=Waiter, container=Default Stateless Container)
    INFO - Deployed Application(path=c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope)
    Soup created
    INFO - Undeploying app: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-application-scope
    Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.42 sec

    Results :

    Tests run: 1, Failures: 0, Errors: 0, Skipped: 0