Questions asked by Björn

Creating a new user programmatically

Björn — Wed, 21 Oct 2015 12:13:54 -0400

I would like to realize the following scenario: Let's say, we have a website publicaly accessible (e-gov-platform). There is a link to a Process Start (HTTP Request). The first activity of this process should be a login/registration form. If the user has already an account, he should be able to login with username and password (for this part this answer is helpful). If not, he should be able to register a new user with a typical registration form. And here I'm stucked: In the public API I cannot find a method to create a new user. Am I searching in the wrong direction?

Kind regards Björn

Getting a list as a result from an ivy webservice

Björn — Wed, 09 Apr 2014 11:40:46 -0400

I created a webservice in ivy, which requests a string as input parameter and returns as result a string and a list (of a custom data class Betreibung).

I can call this webservice from another ivy project and save the result in corresponding attributes. But as I can only save the list result "as List" and not "as List<betreibung>", every resulting List element is not of the class "Betreibung" but of the class "namespace.unknown.Betreibung". For this reason I cannot use the saved list entries later on.

I created a short video to clarify my problem (in german only):

http://youtu.be/qWRUfq9i-xo?hd=1

Calling REST Webservice (HTTP GET)

Björn — Tue, 18 Feb 2014 17:52:38 -0500

I'm trying to use a currency converter in Xpert.ivy: http://rate-exchange.appspot.com. This service is called like this: http://rate-exchange.appspot.com/currency?from=EUR&to=CHF and gives a response like this: {"to": "CHF", "rate": 1.2223900000000001, "from": "EUR"}.

I would like this to call in a script step. So far I tried the method described in http://www.javacodegeeks.com/2012/09/simple-rest-client-in-java.html:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

  HttpClient client = new DefaultHttpClient();
  HttpGet request = new HttpGet("http://rate-exchange.appspot.com/currency?from=EUR&to=CHF");
  HttpResponse response = client.execute(request);
  BufferedReader rd = new BufferedReader (new InputStreamReader(response.getEntity().getContent()));
  String line = "";
  while ((line = rd.readLine()) != null) {
    out.SOME_STRING_DATATYPE = line;
  }

At execution this throws an error in line 'HttpResponse response = client.execute(request);'

Is there a better method to use a REST webservice from within Xpert.ivy?

How to switch between java.io.File and ivy.scripting.objects.File?

Björn — Thu, 12 Dec 2013 16:56:28 -0500

From the Xpert.ivy help I succeeded in converting a ivy File Object to an Java File Object by using...

java.io.File tempFile = in.someIvyFileObjectInstance.getJavaFile();

But what about the inverse way: Java File -> Ivy File? I didn't found a solution for this.

Content of question doesn't show up

Björn — Fri, 06 Dec 2013 14:10:02 -0500

I posted a question minutes ago. In the edit window I can see text and pictures, but in the finished version the question is empty. Here is the same question copied to a word document.

XMLStreamException while calling a SOAP webservice

Björn — Fri, 06 Dec 2013 14:03:36 -0500

I want to use a webservice, which I created in Inubit. The WSDL URL is [http://venus.zhaw.ch:8000/ibis/ws/Betreibungsregisterauszug_ws_Listener?wsdl][1]. When I test the service in [soapUI][2] everything works fine (see picture).

When I test the service in Xpert.ivy Designer 5.1.0 S6, I get the error javax.xml.stream.XMLStreamException: element text content may not contain START_ELEMENT. What could be the reason for this error?

Here is the XML Request in soapUI:

POST http://venus.zhaw.ch:8000/ibis/ws/Betreibungsregisterauszug_ws_Listener HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: text/xml;charset=UTF-8
SOAPAction: "BetreibungsregisterauszugErhalten"
Content-Length: 352
Host: venus.zhaw.ch:8000
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:bet="https://venus.zhaw.ch:8443/ibis/ws/1383213506125/Betreibungsregisterauszug_ws_Listener">
   <soapenv:Header/>
   <soapenv:Body>
      <bet:BetreibungsregisterauszugErhalten>CH450234</bet:BetreibungsregisterauszugErhalten>
   </soapenv:Body>
</soapenv:Envelope>

Best Practice for filling a List in a loop

Björn — Fri, 22 Nov 2013 10:52:25 -0500

I'm using Xpert.ivy Designer 5.1.0 (Lauberhorn) S6. I tried to fill a List in a loop:

In a form I ask the user, how many entries the list will have (numberOfIterations)
With an Alternative Switch element I'm ensuring, that the following steps are executed as often as the defined number of iterations:
In a form I ask the user for the attributes of the list entry (attribute one, attribute two)
In three different variants I add the new list entry to the list. Only the most time consuming variant works. The other variants don't work as expected. I suppose, this is a bug.

To better understand, please watch the screencast on YouTube (2 minutes).

An answer until 25.11. evening would be very appreciated.

[EDIT]: Here the link to the iar-File for testing.

Exception Handling: How to get the error message

Björn — Mon, 11 Nov 2013 16:04:06 -0500

How can I access the exception message in a exception start process element?

Original Question (in German only):

Ich versuche für unsere Studierenden (Unterricht an der ZHAW) eine möglichst generische Fehlerbehandlung aufzuzeigen. Folgendes schwebt mir vor:

Siehe erstes Bild. Pro Prozess füge ich einen Pool 'Fehlerbehandlung' (1) mit einem Lane pro Fehlerquelle hinzu (z.B. 'DB Step Exception) (2)
In diesem Lane gibt es ein Exception Start-Element (3)
Innerhalb des Prozesses kann ich nun überall dieses Start-Element als Exception Handling verwenden, wo es passt (4, 5, 6)
Das Exception Handling selbst soll zunächst einmal darin bestehen, eine aussagekräftige Fehlermeldung anzuzeigen. Hierfür habe ich einen prozessübergreifenden Subprozess 'DisplayErrorPage' erzeugt (zweites Bild)
Innerhalb dieses Subprozesses möchte ich nun in Abhängigkeit des aufgetretenen Java-Fehlers (siehe zum Beispiel drittes Bild) über eine unterschiedliche Fehlermeldung reagieren. Zu diesem Zweck müsste ich aber programmatisch irgendwie auf die Error Message (z.B. drittes Bild) zugreifen können. Wie kann ich dies bewerkstelligen? Ich vermutete zunächst, dass dies ein Objekt in der ivy-Hierarchie ist, fand aber nichts.

Ich wäre sehr froh um eine Antwort bis 13.11. 12 Uhr, damit ich rechtzeitig ein Video für die Studierenden erstellen kann.