I am getting errors when I try to call an Axis POJO service from a Google
Web Toolkit application. The service I am trying to call is the sample
service called "Version". It returns a string with the Axis version number.
The first question I have is whether it is possible to call Axis2 services
from non Axis2 clients. In my case, the client is an AJAX application built
using GWT.
Here is the GWT code that makes the call:
public static void doGet(String url) {
RequestBuilder builder = new RequestBuilder(RequestBuilder.GET,
url);
try {
Request response = builder.sendRequest(null, new
HTTPResponseHandler() );
} catch (RequestException e) {
System.out.println("Exception caught.");
}
}
Where url = "http://localhost:8080/axis2/services/Version/getVersion";
If I make the request as GET request, I get the following error:
<html><head><title>Apache Tomcat/6.0.14 - Error report</title><style><!--H1
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;}
H2
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;}
H3
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;}
BODY
{font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;}
P
{font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A
{color : black;}A.name {color : black;}HR {color : #525D76;}--></style>
</head>
<body><h1>HTTP Status 500 - </h1><HR size="1"
noshade="noshade"><p><b>type</b> Exception report</p><p><b>message</b>
<u></u></p><p><b>description</b> <u>The server encountered an internal error
() that prevented it from fulfilling this
request.</u></p><p><b>exception</b>
<pre>java.lang.NullPointerException
org.apache.axis2.transport.TransportUtils.createDocumentElement(
TransportUtils.java:156)
org.apache.axis2.transport.TransportUtils.createSOAPMessage(
TransportUtils.java:111)
org.apache.axis2.transport.http.util.RESTUtil.processURLRequest(
RESTUtil.java:101)
org.apache.axis2.transport.http.AxisServlet$RestRequestProcessor.processURLRequest
(AxisServlet.java:799)
org.apache.axis2.transport.http.AxisServlet.doGet(AxisServlet.java:242)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
</pre></p><p><b>note</b> <u>The full stack trace of the root cause is
available in the Apache Tomcat/6.0.14 logs.</u></p><HR size="1"
noshade="noshade"><h3>Apache Tomcat/6.0.14</h3></body></html>
If I make the request as a POST request, I get the following error:
<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope";
xmlns:wsa="http://www.w3.org/2005/08/addressing";>
<soapenv:Header><wsa:Action>http://www.w3.org/2005/08/addressing/soap/fault
</wsa:Action></soapenv:Header>
<soapenv:Body>
<soapenv:Fault>
<soapenv:Code><soapenv:Value>soapenv:Receiver</soapenv:Value></soapenv:Code>
<soapenv:Reason><soapenv:Text xml:lang="en-US">
java.lang.NullPointerException</soapenv:Text></soapenv:Reason>
<soapenv:Detail />
</soapenv:Fault>
</soapenv:Body>
</soapenv:Envelope>
If I hit the service from my browser, I get successful response:
<ns:getVersionResponse xmlns:ns="http://axisversion.sample";>
<ns:return>Hello I am Axis2 version service , My version is 1.3
</ns:return>
</ns:getVersionResponse>
The Axis2 service is the sample POJO service called "Version".
Any help or guidance would be greatly appreciated.
Best Regards.
--
Anas Mughal
