How to use XML functions in CEP

Question

Hi,
I am trying to implement XML functions in CEP. But i am getting error while using XMl function in config.xml file.
Please provide some help to resolve this issue.
Adapter Class
package com.bea.wlevs.example.adapter.XML_CEP;
import com.bea.wlevs.ede.api.EventProperty;
import com.bea.wlevs.ede.api.EventType;
import com.bea.wlevs.ede.api.EventTypeRepository;
import com.bea.wlevs.ede.api.RunnableBean;
import com.bea.wlevs.ede.api.StreamSender;
import com.bea.wlevs.ede.api.StreamSource;
import com.bea.wlevs.util.Service;
public class XMLAdapter implements RunnableBean, StreamSource {
private String id;
private String name;
private StreamSender eventSender;
private EventTypeRepository etr_;
public XMLAdapter() {
super();
public void run() {
     setName("abc");
generateMessage();
public void setId(String id)
     this.id = id;
public void setName(String i)
     this.name = i;
@Service
public void setEventTypeRepository(EventTypeRepository etr) {
     etr_ = etr;
private void generateMessage() {
     EventType type = etr_.getEventType("XMLEvent");
     EventProperty messageProp = type.getProperty("name");
     EventProperty msgProp = type.getProperty("msg");
     Object event = type.createEvent();
     messageProp.setValue(event, name);
     msgProp.setValue(event, "<PDRecord><PDId>6</PDId><PDName>hello1</PDName></PDRecord>");
     eventSender.sendInsertEvent(event);
public void setEventSender(StreamSender sender) {
eventSender = sender;
public synchronized void suspend() {
EPN Assembly file
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:osgi="http://www.springframework.org/schema/osgi"
     xmlns:wlevs="http://www.bea.com/ns/wlevs/spring" xmlns:jdbc="http://www.oracle.com/ns/ocep/jdbc"
     xmlns:spatial="http://www.oracle.com/ns/ocep/spatial"
     xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/osgi
http://www.springframework.org/schema/osgi/spring-osgi.xsd
http://www.bea.com/ns/wlevs/spring
http://www.bea.com/ns/wlevs/spring/spring-wlevs-v11_1_1_3.xsd
http://www.oracle.com/ns/ocep/jdbc
http://www.oracle.com/ns/ocep/jdbc/ocep-jdbc.xsd
http://www.oracle.com/ns/ocep/spatial
http://www.oracle.com/ns/ocep/spatial/ocep-spatial.xsd">
     <wlevs:event-type-repository>
          <wlevs:event-type type-name="XMLEvent">
               <wlevs:properties>
                    <wlevs:property name="msg" type="xmltype" />
                    <wlevs:property name="name" type="char" length="256" />
               </wlevs:properties>
          </wlevs:event-type>
     </wlevs:event-type-repository>
     <wlevs:adapter advertise="true" id="XML_Adapter"
          class="com.bea.wlevs.example.adapter.XML_CEP.XMLAdapter">
          <wlevs:listener ref="IPStream" />
          <wlevs:instance-property name="id" value="123" />
          <wlevs:instance-property name="name" value="Kanika" />
     </wlevs:adapter>
     <wlevs:processor id="XML_processor" provider="cql">
          <wlevs:listener ref="OPStream" />
     </wlevs:processor>
     <wlevs:channel id="IPStream" event-type="XMLEvent">
          <wlevs:listener ref="XML_processor" />
     </wlevs:channel>
     <wlevs:channel id="OPStream" event-type="XMLEvent">
          <wlevs:listener ref="bean" />
     </wlevs:channel>
     <bean id="bean" class="com.bea.wlevs.example.outputBean.XML_CEP.OutputBean">
     </bean>
</beans>
Config.xml file
<?xml version="1.0" encoding="UTF-8"?>
<wlevs:config xmlns:wlevs="http://www.bea.com/ns/wlevs/config/application"
xmlns:jdbc="http://www.oracle.com/ns/ocep/config/jdbc">
<processor>
<name>XML_processor</name>
<rules>
          <query id="q1"><![CDATA[
         SELECT
             XMLEXISTS(
             "for $i in /PDRecord RETURN $i/PDName"       *// I am getting error at this line*       
         PASSING BY VALUE 
                msg as "."
                 RETURNING CONTENT
                  ) XMLData
              FROM IPStream
          ]]></query>
</rules>
</processor>
</wlevs:config>
Output Bean Class
package com.bea.wlevs.example.outputBean.XML_CEP;
import com.bea.wlevs.ede.api.EventType;
import com.bea.wlevs.ede.api.EventTypeRepository;
import com.bea.wlevs.ede.api.StreamSink;
import com.bea.wlevs.example.event.XML_CEP.DummyEvent;
import com.bea.wlevs.util.Service;
public class OutputBean implements StreamSink {
     EventTypeRepository etr_;
     @Service
     public void setEventTypeRepository(EventTypeRepository etr) {
          etr_ = etr;
public void onInsertEvent(Object event) {
     EventType eventType = etr_.getEventType(event);
     String prop = (String)eventType.getPropertyValue(event, "name");
     String prop2 = (String)eventType.getPropertyValue(event, "msg");
     System.out.println("Tuple Message: " + prop + ":" + prop2);
Error i am getting is:
<Jun 29, 2011 7:53:59 PM IST> <Emergency> <CQLServer> <BEA-000000> <CREATE QUERY q1 AS
     SELECT
               XMLQUERY(
"for $i in /PDRecord WHERE $i/PDId <= $x RETURN $i/PDName"
PASSING BY VALUE
msg as ".",
(name+1) AS "x"
RETURNING CONTENT
) XMLData
          FROM IPStream
          >
<Jun 29, 2011 7:53:59 PM IST> <Emergency> <CQLServer> <BEA-000000> <CREATE QUERY q1 AS
     SELECT
               XMLQUERY>>(
"for $i in /PDRecord WHERE $i/PDId <= $x RETURN $i/PDName"<<
PASSING BY VALUE
msg as ".",
(name+1) AS "x"
RETURNING CONTENT
) XMLData
          FROM IPStream
generic syntax error. The syntax expects STRING token>
<Jun 29, 2011 7:53:59 PM IST> <Emergency> <CQLServerTrace> <BEA-000000> <oracle.cep.parser.SyntaxException: generic syntax error>
<Jun 29, 2011 7:53:59 PM IST> <Error> <CQLProcessor> <BEA-000000> <Failed to create statement [q1].
Invalid statement: "SELECT
               XMLQUERY>>(
"for $i in /PDRecord WHERE $i/PDId <= $x RETURN $i/PDName"<<
PASSING BY VALUE
msg as ".",
(name+1) AS "x"
RETURNING CONTENT
) XMLData
          FROM IPStream"
Description: generic syntax error
Cause: This DDL command has syntax error
Action: The syntax expects STRING token>
<Jun 29, 2011 7:53:59 PM IST> <Error> <Deployment> <BEA-2045016> <The application context "XML_CEP" could not be started. Could not initialize component
"<unknown>":
Invalid statement: "SELECT
               XMLQUERY>>(
"for $i in /PDRecord WHERE $i/PDId <= $x RETURN $i/PDName"<<
PASSING BY VALUE
msg as ".",
(name+1) AS "x"
RETURNING CONTENT
) XMLData
          FROM IPStream"
Description: generic syntax error
Cause: This DDL command has syntax error
Action: The syntax expects STRING token>
<Jun 29, 2011 7:54:00 PM IST> <Notice> <Deployment> <BEA-2045001> <The application bundle "XML_CEP" was undeployed successfully>
Thanks in advance.

Answer 1

Hi Vikram,
I need some more help from your side.
It would be great help if you will let me know that how to extract the data from particular XML tag.
As of now i want to extract particular XML node by applying that query and the result i am getting is: <applicationID>Engage</applicationID>
I just want to know if I want to extract only data from this XML node i.e Engage instaed of *<applicationID>Engage</applicationID>*
Then what will be the query?
Thanks in Advance