ADFBC change - automatic updating using PUSH - Data Service entity Active?

Hi all

Jdev Version: 11.1.1.7.1

Summary of the problem: I have a table in the user interface based on a line of open readonly SQL base tickets showing VO. The queue will be worked by several people of support at the same time. So, it is ideal that the queue Auto - refreshes to collect a ticket from the table in the user interface if someone else picked up the ticket & closed. The UI is equipped with filters - so think the option is to push to an activeOutputText and then refresh the table UI using PPR.

Ofcourse Poll is an option - but am inclined to PUSH as it seems most optimal.

But the documentation around the use of live data for ADFBC is very confusing. Most of the examples out there talking about external data sources or a direct change in DB as an event in a first time - not a change of entity as an event trigger object. I have a few queries-

1. is JMS the only way by which the changes of the entity object can be listened to or is there any other mechanism?

2. on the binding of the tree on the definition of the page, we see ChangeEventPolicy with an option like "push." When is it useful?

3. any good example of simple use ADFBC with live data?

4. is my hypothesis on the af: poll be bad valid? Leave the configured push with "long-polling" is much better than a 'af:poll '.

Thanks in advance!

1. is JMS the only way by which the changes of the entity object can be listened to or is there any other mechanism?

I guess you can use any type of mechanism to queue, JMS is 'natural' because that is part of Java EE (so it is included in the Java EE as Weblogic servers)

2. on the binding of the tree on the definition of the page, we see ChangeEventPolicy with an option like "push." When is it useful?

It is used in combination with the active data

3. any good example of simple use ADFBC with live data?

http://technology.AMIS.nl/2012/06/19/notifying-ADF-applications-of-database-changes-fast-and-lean-using-Active-data-service-for-server-to-client-push-part-two/

4. is my hypothesis on the af: poll be bad valid? Leave the configured push with "long-polling" is much better than a 'af:poll '.

Well, that depends on the number of users, refresh rate...

But for your use case, push is probably much better than af: poll

Have you thought about putting your VO readonly to the module of the shared application (to the level of the application): Sharing of Instances of the Application Module View (this was also supported for notifications of changes unnecessary db)?

Dario

Tags: Java

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