Errai DataBinding Standalone

[calderas]

Hi,

This page (Chapter 9. Data Binding) says that DataBinding can be used standalone. But not, it needs Errai UI and other dependencies. Does somebody have a real example using just DataBinding?

Thanks a lot,

Juan

[csa]

Hi Juan,

errai-data-binding does not depend on errai-ui and as the docs state you can use it independently.

Here's the chapter on how to set up errai-data-binding:

http://docs.jboss.org/errai/3.1.2.Final/errai/reference/html_single/#_errai_data_binding

An introduction to the standalone API:

http://docs.jboss.org/errai/3.1.2.Final/errai/reference/html_single/#sid-51282340

Cheers,

Christian

[calderas]

Thank you for your answer.

Sorry for my lack of experience and my pseudo-English.

I made a very simple "safe-mode" gwt-app. Then, I added the Errai Data Binding according to Errai Reference Guide.

But I get this error:

Tracing compile failure path for type 'org.jboss.errai.databinding.client.api.DataBinder'

            [ERROR] Errors in 'org/jboss/errai/databinding/client/api/DataBinder.java'

               [ERROR] Line 76: No source code is available for type org.jboss.errai.common.client.api.Assert; did you forget to inherit a required module?

            [ERROR] Errors in 'org/jboss/errai/databinding/client/BindableProxyAgent.java'

               [ERROR] Line 339: No source code is available for type org.jboss.errai.common.client.api.Assert; did you forget to inherit a required module?

            [ERROR] Errors in 'org/jboss/errai/databinding/client/PropertyChangeHandlerSupport.java'

               [ERROR] Line 48: No source code is available for type org.jboss.errai.common.client.api.Assert; did you forget to inherit a required module?

            [ERROR] Errors in 'org/jboss/errai/databinding/client/BindableProxy.java'

               [ERROR] Line 30: No source code is available for type org.jboss.errai.common.client.api.WrappedPortable; did you forget to inherit a required module?

Obviously, I have no experience with Errai. I feel, some kind of previous configuration is missing.

Thanks a lot,

Juan

[csa]

Hi,

Adding the errai-common module to your gwt.xml should fix this issue:

<inherits name="org.jboss.errai.common.ErraiCommon" />

Cheers,

Christian

[calderas]

That inherit lets me to compile and run the app.

But know, I get the exception "There are no proxy providers for bindable types registered yet." in this line:

DataBinder<Customer> dataBinder = DataBinder.forType(Customer.class);

It looks like @Bindable is not working or how the proxies are registered?

My Customer is the same as the documentation.

The @PostConstructor does not work.

Thanks a lot.

Juan

[csa]

My guess is that you're missing the ErraiApp.properties file. This file can be empty but it is used as a placeholder for classpath scanning:

https://github.com/errai/errai-tutorial/blob/master/src/main/resources/ErraiApp.properties

Cheers,

Christian

[calderas]

Nop,

I put the file in many folders just to be sure, but nothing, the "There are no proxy providers for bindable types registered yet."  is still there.

I could do the errai-tutorial in order to know how it works; however, my plant to use just the errai-binding as standalone inside my gwt app.

So, a very simple tutorial about how to use errai-binding in netbeans+gwt2.7+maven would be great.

Thanks

[csa]

You could check if your .errai folder (created a compile time in your working directory) contains a file called BindableProxyLoaderImpl.java. If yes, then everything is configured correctly but your @Bindable types couldn't be found. The cause for this is usually a missing ErraiApp.properties file or an incorrect package. A package that's not marked as GWT translatable.

[csa]

And just to make sure. You did this, right?

http://docs.jboss.org/errai/3.1.2.Final/errai/reference/html_single/#_bootstrapping_data_binding_without_errai_ioc

This is required for bootstrapping without IOC.

[calderas]

That was the "missing"  

It worked with the simple Customer POJO but not with my real class. I guess my class is complex and I need to learn about Bindable and etc. question of time.

I see that the PropertyChangeEvent is fired when the bound widget is left; but, is there a way to detect the changes before left the widget? That is to say; while the user start to typing on the widget.

Thanks a lot for you help,

[vito.salvia]

I'm tring to use gwt with errai databing in standalone mode, but it'doesn't work. Errai version is 4.0.2.

Any solutions????