48thAirhacksQ&A.md

48thAirhacksQ&A.md

Ask questions and see you at March, 5th, 6.PM. CET: http://www.ustream.tv/channel/adambien

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Hi Adam,

Just want to say thanks for all your videos! They are awesome and I recommend them to all my colleagues as well as your books.
I’m a long time viewer.

I was wondering if you could help me debug something. I was trying to replicate your code from your youtube video: https://www.youtube.com/watch?v=KUISpHbWib0

And when I run the code and hit http://localhost:8080/async/resources/answers in the browser it just hangs.

When I try to debug the code I can see the event being fired but the CDI observer never kicks in and receives the event.
When I print out the “consumer” variable to the console right after firing the event it shows something like:

Event Fired:com.airhacks.async.business.async.AnswersResource$$Lambda$182/37769991@1008c2ae

I thought maybe that somehow the event listener is waiting for a Consumer and in reality Consumer is being fired? Just a wild guess..

Here is the link to all my code. I think you should be able to get it.
https://github.com/tmulle/asynctest.git

Is there anything you see wrong? Maybe something simple and I overlooked something?

I’ve run this on both WildFly 10 and Glassfish 4.1.1 and they both hang right after they fire the event.

UPDATE: I've just tested this same code on WildFly 12 and it still hangs.

Thanks,

• Tim

Hi Adam,

Do you know of any Java EE frameworks that add client (service provider) support for SAML 2.0 SSO profiles, something like spring SAML framework but for Java EE? For example, a framework that uses the Java EE Security API.
I need to create a project that can use different 3rd party identity providers for the authentication\authorization process and I don't want to add spring just for that.
I heard about keycloak but it looks that it's for creating an identity provider and not just a service provider. Am I wrong?

Thanks,
Eyal

Moin Adam,

thanks for your approach using plain standard javascript only. I really appreciate that and I think it is very helpful in long term support applications.
In my projects we are visualizing machine data in an ui. We are currently using javaFX and have to provide a web-ui in near future, for which we want to build a javascript-application. For us the main benefit of FX is databinding, esp because we have to deal with complex model objects. What do you think, how do you implement a two-way-databinding using plain javascript?

In practice a machine has a name, some main data and a set of sensors with number and data. An example json of a machine might be

{"name":"testMachine","main":{"valueA":47,"valueB":11},"sensors":[{"gauge":42,"sensor":12},{"gauge":3.14,"sensor":18}]}

The machine has a rest service to read and change main data, to read, add and remove sensors and to change some of sensor values. It also offers a web socket that pushes messages whenever sensors change (add, remove, change value).
The js-app visualizes that machine. It shows gauges with current sensor values and their variation in time. Even some meta-gauges that show calculated values. Further it offers input fields and submit-buttons to change the main and some sensor data.
In js-code we would like to have a single model-var with the machine data. We would like to bind that model with the web-socket,
the rest-calls and the several ui-dom objects.

How do you do that in plain standard js without ending up in a event-listener-hell?

Thanks, and greetings from Hamburg!