[xwiki-users] Calling a web service from Velocity

[Thomas Kliethermes]

I've used a bare-bones XWiki plugin to instantiate a webservice client 
using axis, then call that from velocity. XWiki is bundled with axis.jar, 
so there might be a more "native" way, but I've never seen it documented 
if there is.  I think there might be a way to Just Make It Happen in 
Groovy just by passing in the web service URL, but I haven't investigated 
that.  Has any one tried it? 
http://docs.codehaus.org/display/GROOVY/Groovy+SOAP

The steps I did went something like this:

1) Use Axis's WSDL2Java to create the client.

Something like:   java org.apache.axis.wsdl.WSDL2Java --helperGen --output 
src http://theurl/to/the/service?WSDL

That command will place the java classes under a directory called "src".


2) The create your plugin using the online example, and add a method to 
create a connection to your webservice.  This is the method I have, except 
the class name is changed.  Axis created all the needed classes in the 
previous step.  Just import them.

    public YourWebService getWebService() throws ServiceException
    {
       YourWebService ServiceLocator imlocator = new YourWebService 
ServiceLocator();
        YourWebService  ims = null;
        try
        {
            //Actually get a service
            ims = imlocator.getYourWebService();
 
            //cast it as the stub to set the password
            //YourWebService Stub stub = (YourWebService Stub)ims;
            //TODO: Set username and password
            //stub._setProperty(javax.xml.rpc.Stub.USERNAME_PROPERTY, 
username);
            //stub._setProperty(javax.xml.rpc.Stub.PASSWORD_PROPERTY, 
password);
 
        }
        catch (ServiceException se)
        {
            mLogger.debug("Big fat error in plugin: " + se.getMessage());
            throw se;
        }
        return ims;
    }

3) Build and copy the needed jar files to lib.

4)  #set($webservice = $xwiki.yourplugin.getWebService())
$webservice.method1()
$webservice.method2("blah")
$webservice.method3()

-Tom

--
Tom Kliethermes
eSupport Initiatives
IBM Information Management
(913) 599-7240   Fax: (913) 599-8590
http://www.ibm.com/software/data




Ute <ute_gerlach at arcor.de> 
06/15/2007 01:33 PM
Please respond to
xwiki-users at objectweb.org


To
xwiki-users at objectweb.org
cc

Subject
Re: [xwiki-users] Calling a web service from Velocity







Sorry for posting this again, but I had the bad feeling that my first post
didn't make it into the mailing list.
Unfortunately I'm still struggling with making a call to a Web service...

Cheers,
Ute


Ute wrote:
> 
> Hi all,
> 
> can anyone give me an example how to call an external web service from
> Velocity code and evaluate the result?
> The question may be stupid, but I'm new to XWiki, Velocity, and WEb
> programming...
> 
> Many thanks in advance,
> Ute
> 

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