Java Development

[frankkona]

hello all,

I am trying to call a webservice from Blackberry JDE application. Following is the code and it is not working.

on ht.call function, it just sits there. not error though. I think action string is wrong. any ideas.

 public void initiateWebService()
    {
          
          String serviceUrl="http://www.mysite.com/WebServices.cfc/WSDL";
          String namespace="http://www.mysite.com/";
          String action="http://www.mysite.com/WebServices.cfc?method=fcnAccountsXMLGet"; ///??????????????do i need WSDL?
          String method="fcnAccountsXMLGet";

          try{
                      
                SoapObject client = new SoapObject(serviceUrl,method);
                //client.addProperty("num1","5");
                HttpTransport ht = new HttpTransport(serviceUrl);
                SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                envelope.bodyOut = client;
                envelope.dotNet = false; //I guess this has to be false since it is not dotnet
                
                try
                {
                    //ht.call("urn:aritmatikawsdl#add", envelope);
                    ht.call(action, envelope);
                    String response = envelope.getResponse().toString();
                }
                catch(Exception ex)
                {
                    ex.printStackTrace();
                }
            }catch(Exception e){
                e.printStackTrace();
            }

[DingusMcGee]

I would strongly recommend getting Sun's Java Wireless Toolkit 2.5.2_01 for CLDC from their site (Sun JWT) and using the Stub Generator in the Utilities application to create the web service stubs that you can them import to your project. I've used this for a .NET WCF service and a .NET Web Service and both worked great.

The one thing you will need to consider is the method parameters and return types - they should be as standard as possible (you can use classes but their internal member variable data types should also be types that are supported). For supported types see below.

One thing i have found is that the stub generator won't generate stubs when the return type is a class that contains a member variable that is an instance of the same class - also, DateTime objects aren't always handled well so you probably want to return a string representation of your datetime in a pre-determined format. 

Sun web services for JME supported types

[Medha07]

Hi,

       Can you please provide steps or sample code for how to use Sun's Java Wireless Toolkit 2.5.2_01 for CLDC?

Thanks & Regards,

Medha

[simon_hain]

both ksoap2 and wtk have their advantages and disadvantages. personally i use ksoap2 for webservices. there are quite some tutorials and links, search the forum as i have posted them many times.

[Medha07]

Hi Simon, I had already tried with ksoap. It works fine with .asmx service. But when I tried ksoap with WCF Service, it gives me the exception: org.xmlpull.v1.XmlPullParserException: unexpected type (position:END_DOCUMENT null@1:0 in java.io.InputStreamReader@44ebb7e0)

Is there any specific setting for consuming WCF service using ksoap?

Thanks & Regards,

Medha

[simon_hain]

most likely you get an http error message, ksoap2 cannot parse them. you can extend SocketConnectionMidp from the ksoap2 package to add connection status code handling etc. i have also extended it to give the full reply in plain text before parsing it. as a third tip, you can write most code in desktop java for jUnit by using HttpTransportSE from ksoap2, makes testing A LOT easier.

[Medha07]

Can you please explain how to use ServiceConnectionMidp class to handle connection status code?

Thanks & Regards,

Medha

[simon_hain]

overwrite the openInputStream method of ServiceConnectionMidp, this is where the real connection happens. you can use getResponseCode on the connection there (use connector.open in the constructor).

[Medha07]

Hi Simon,

I have extended  class "ServiceConnectionMidp" and override the "openInputStream" method. But when I use:
int nLength = (int)connection.getLength(); OR  int nLength = oInputStream.available();
gives nLength  = 0.
I have also tried: IOUtilities.streamToBytes(oInputStream); But is is not working.

Thanks & Regards,

Medha

[simon_hain]

you don't have to retrieve anything, this is done by the kxml pull parser part of ksoap2. just call getResponseCode and handle the returned code (everything but 200 throws an exception with some descriptive text, for example).