How to send push via o:socket from EJB to Client? - jsf

Question

I need help for the cooperation between #EJB and #CDI
Hi all,
I would like to have the following scenario:
1) In my app a Notification is created (in database)
2) Afterwards a Push Notification should be send to the specific client
3) In Client it will update a specific #form from my page...
Here is my code:
#Stateless
public class NotificationCreationSendServiceBean implements NotificationCreationSendService {
#Inject
private BeanManager beanManager;
public void createNotification {
// createNotificationInDatabase();
.....
PushEvent event = new PushEvent("Test");
beanManager.fireEvent(event);
}
}
My JSF Bean:
import static org.omnifaces.util.Messages.addGlobalError;
import static org.omnifaces.util.Messages.addGlobalInfo;
#Named
#ViewScoped
public class NotificationSocket implements Serializable {
#Inject
private LoginBean loginBean;
#Inject
#Push(channel = "notificationChannel")
private PushContext push;
/**
* Push Notification
*
* #param recipientUser
*/
public void pushUser(#Observes PushEvent event) {
Set<Future<Void>> sent = push.send(event.getMessage(), loginBean.getCurrentEmployee().getId());
if (sent.isEmpty()) {
addGlobalError("This user does not exist!");
} else {
addGlobalInfo("Sent to {0} sockets", sent.size());
}
}
}
In here JSF page:
<o:socket channel="notificationChannel"
user="#{loginBean.currentEmployee.id}" scope="view">
<f:ajax event="someEvent" listener="#{bean.pushed}" render=":notificationLink" />
</o:socket>
My question is now:
How is my #EJB container recognized with Socket is the right one? Where do I define the channel name in #EJB?
Can anybody help me, please.

Answer 1

How to send push via o:socket from EJB to Client?
This title is strange as your question already shows the code which does exactly that right.
How is my #EJB container recognized with Socket is the right one? Where do I define the channel name in #EJB?
This specific question is really strange in the current context. I can only assume that you actually have multiple #Observes PushEvent methods and that you actually wanted to target only a specific method which is associated with a specific #Push channel. Only in that context this question would make somewhat sense.
Well, in order to achieve that, there are several ways.
Pass it as an argument/property of the PushEvent class:
beanManager.fireEvent(new PushEvent("notificationChannel", "Test"));
And then just check for that in your observer method:
if ("notificationChannel".equals(event.getChannelName())) {
// ...
}
Feel free to use enums instead.
Or, create a specific class for every specific event:
beanManager.fireEvent(new NotificationEvent("Test"));
And then just make sure you observe it in only one method:
public void pushUser(#Observes NotificationEvent event) {
// ...
}
Or, create a #Qualifier for the PushEvent:
#Qualifier
#Retention(RUNTIME)
#Target({ FIELD, PARAMETER })
public #interface Notification {}
Which you #Inject via Event<T>:
#Inject #Notification
private Event<PushEvent> pushEvent;
public void createNotification {
pushEvent.fire(new PushEvent("Test"));
}
And then just make sure you observe it in only one method:
public void pushUser(#Observes #Notification PushEvent event) {
// ...
}