how to use Switchyard Http and Rest easy Binding

[ramandeep]

Hi ,

I have a do a POC wherein there a HTTP url which the client would hit

e.g http://localhost:8080/rest/rest/getIDDetails?IDfNumber=2&IDResets=0&IDRow=1&

I have you use this information to call rest-easy API which is exposed. Basically we have to integrate 2 systems.

Now I am thinking to use Http binding to get HTTP header information and than use rest easy binding to consume exposed API's .

I am quite new to switchyard . So am I going in right direction . Also I am not clear on how to use rest-easy in switchyard ,didnt find much material on that .

[jaysensharma]

Will this demo help, It demonstrates the usage of RESTEasy Component's REST binding features. It binds two SwitchYard services over REST URLs that can be accessed by any REST based client. One of them also acts as a client. When a message arrives to the Order endpoint OrderService will be invoked.

https://github.com/jboss-switchyard/quickstarts/tree/master/rest-binding

[ramandeep]

Hi Jay..  Thanks for your prompt reply . I am stuck due to an error while using using Rest Binding.

      below is Switchyard. xml

I am not sure how to resolve this error

[jaysensharma]

The error which you mentioned in the Screenshot is related to Switchyard bug:   https://issues.jboss.org/browse/SWITCHYARD-2725

As a workaround you can try creating your own custom message composer, In that custom composer users can ensure that all the request/responses are bound to a specific operation name. Please see below what is custom message composer.

Message Composition - SwitchYard - Project Documentation Editor

[ramandeep]

Hi Jay ,

The Error is "The referenced Java interface for service "RestService" specifies more than one operation and the binding "rest1" does not specify which to use in the operation selector "

Now my RestService Interface has just one method

public interface RestService {

    public  Response  getStudentDetails();

}

I am not exactly sure what would message composer class do here ?

[bfitzpat]

Sorry but I was out for the Thanksgiving holiday.

The issue you describe is due to an issue (Issue Navigator - JBoss Issue Tracker) which will be fixed in the upcoming release of JBDSIS 8.0.4 (8.0.3 is out now, but 8.0.4 is on the way).

If you need to get past the issue before then, you can download the latest Luna updates before 8.0.4 is available by adding this update site - SwitchYard Tooling - Development Milestone Eclipse Update Site: 2.0.1.CR3 - and installing the latest Luna-based tooling for SwitchYard.

Hope that helps!

--Fitz

[ramandeep]

Hi Brian,

I was able to pass through the above issue but now I am stuck with an another one i.e NullPointerException.

Here is the detailed explanation :

Null Pointer exception for a reference while consuming Rest service in Bean - Switchyard Project

getting a NPE on a reference in Bean Service.

Don't know why the reference has not been initialized even after using @Inject and @Reference.

Thanks

Raman