Hi everyone...
I'm implementing a stand-alone server and would like to add XML-RPC
(version 3.0) support for it. My app is supported by Spring, so I'd
like to use my existing Spring configurations to wire up my XML-RPC
configurations. How Spring actually injects my XmlRpcHandler is not
entirely the issue, it's more of how to instantiate a new, dynamic,
object (based on class name) so that XML-RPC can handle requests to it.
So I have some server code (mind you, I've removed my error checking
and try/catch blocks for brevity)... note that I'm using the XML-RPC
library version 3.0:
-------------
private WebServer xmlRpcWebServer = null;
private XmlRpcServer xmlRpcServer = null;
private int port;
private String handlerClass;
xmlRpcWebServer = new WebServer(port);
xmlRpcServer = xmlRpcWebServer.getXmlRpcServer();
PropertyHandlerMapping phm = new PropertyHandlerMapping();
phm.addHandler(
"XMLRPCConnectionHandler",
Class.forName(handlerClass, true, Thread.currentThread
().getContextClassLoader()).newInstance().getClass()
);
xmlRpcServer.setHandlerMapping(phm);
XmlRpcServerConfigImpl serverConfig = (XmlRpcServerConfigImpl)
xmlRpcServer.getConfig();
serverConfig.setEnabledForExtensions(true);
serverConfig.setContentLengthOptional(false);
xmlRpcServer.setConfig(serverConfig);
xmlRpcWebServer.start();
-------------
Suffice to say that "port" and "handlerClass" are populated
automatically by Spring, so they actually represent "1234" and
"my.package.Class" (for example).
My log file shows that the handlerClass is instantiated, however, I
get an error when addHandler executes:
Exception in thread "SM-XMLRPCMgr" java.lang.IllegalStateException:
Invalid parameter or result type: org.apache.xmlrpc.XmlRpcRequest
at
org.apache.xmlrpc.common.TypeConverterFactoryImpl.getTypeConverter
(TypeConverterFactoryImpl.java:289)
at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler
$MethodData.<init>(ReflectiveXmlRpcHandler.java:43)
at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.<init>
(ReflectiveXmlRpcHandler.java:69)
at
org.apache.xmlrpc.metadata.ReflectiveXmlRpcMetaDataHandler.<init>
(ReflectiveXmlRpcMetaDataHandler.java:51)
at
org.apache.xmlrpc.server.AbstractReflectiveHandlerMapping.newXmlRpcHandl
er(AbstractReflectiveHandlerMapping.java:169)
at
org.apache.xmlrpc.server.AbstractReflectiveHandlerMapping.registerPublic
Methods(AbstractReflectiveHandlerMapping.java:150)
at org.apache.xmlrpc.server.PropertyHandlerMapping.addHandler
(PropertyHandlerMapping.java:97)
at edu.csun.groupmgr.XMLRPCConnectionManager.run
(XMLRPCConnectionManager.java:122)
at java.lang.Thread.run(Thread.java:613)
For reference, my Handler looks like this:
--------------
package edu.csun.groupmgr;
import org.apache.log4j.Logger;
public class XMLRPCConnectionHandler{
private Logger log;
public XMLRPCConnectionHandler() {
this.log = Logger.getLogger(this.getClass());
log.debug("XMLRPCConnectionHandler online");
}
public boolean isStudentActive(String test, String test2){
log.debug(test + " | " + test2);
return true;
}
}
--------------
I would like to keep the class name variable (hence the
"Class.forName") because this class might change or be swapped in and
out for different versions via the Spring configuration, and I want
to keep it flexible. What would be the proper method of invoking
this handler class to pass to the RPC server? Any help would be
appreciated. Thanks!
Ryan Shelley
Lead Developer
ITR Web Development/Middleware
California State University, Northridge
818.677.4258
[EMAIL PROTECTED]
