Problems with Knopflerfich-Axis

[Yesica Diaz]

Hi,

I am working at interoperability level between OSGi services and Web services. I use Knopflerfish framework because it has the Knopflerfish Axis port for providing SOAP/Web servicess access to nay OSGi bundle. There are some available examples at the URL: https://www.knopflerfish.org/svn/knopflerfish.org/trunk/osgi/bundles_opt/soap/readme.html

However, I obtain errors in the first example (soapobject) . This example implements a server side SOAP object (I've simplified the example reduccing the methods number). The soapobject bundle install a service object into the service registry. Using the following URLs from a Web browser to explore the service: http://localhost:8080/axis/services

But when I access to URL: http://localhost:8080/axis/services/remoteFW?method=getHelloWorld
I obtain the following result:

<soapenv:Envelope>
    <soapenv:Body>
    <soapenv:Fault>
        <faultcode>soapenv:Server.userException</faultcode>
        <faultstring>java.lang.NullPointerException</faultstring>
        <detail/>
    </soapenv:Fault>
    </soapenv:Body>
</soapenv:Envelope>

The soapobject, axis-osgi, and ksoap-osgi are installed and started. My knopflerfish framework version is 2.0.0.
I can't understand these errors. Can somebody help me?  Has somebody any example of soap services installed in Knopflerfish?
Does anybody know free software libraries for Axis for Knopflerfish?
Thanks a lot.

Best regards,
Yesica Diaz.

[Gunnar Ekolin]

I think you have encountered an XML-parsing problem.
The default XML-parser included in the JVM you are using is not capable enough for way it is used by the Axis implementation.

Which OS, JVM versions are you using?

I tried with Knopflerfish 2.0.4 running on Apples JVM, 1.5.0_13-121, and MacOSX 10.4.11. This gave me the NullPointerException you are describing above.

Then I downloaded xercesImpl.jar (version 2.9.1) and xml-apis.jar from
http://xerces.apache.org/xerces2-j/index.html
and installed them in the JVMs endorsed directory, $JAVA_HOME/lib/endorsed.

When I restarted the framework it WORKS! I.e., Srufing in to
http://localhost:8080/axis/services/remoteFW?method=getBundles
resultedin in the follwoing output:

−
    <soapenv:Envelope>
−
    <soapenv:Body>
−
    <getBundlesResponse soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
−
    <getBundlesReturn xsi:type="soapenc:Array" soapenc:arrayType="xsd:long[24]">
<item>5</item>
<item>21</item>
<item>4</item>
<item>14</item>
<item>11</item>
<item>18</item>
<item>8</item>
<item>17</item>
<item>9</item>
<item>1</item>
<item>15</item>
<item>16</item>
<item>22</item>
<item>20</item>
<item>19</item>
<item>2</item>
<item>13</item>
<item>10</item>
<item>12</item>
<item>0</item>
<item>6</item>
<item>7</item>
<item>23</item>
<item>3</item>
</getBundlesReturn>
</getBundlesResponse>
</soapenv:Body>
</soapenv:Envelope>

[Yesica Diaz]

Thank you. You are right.