How to resolve the error while using user defined function.

Question

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="TestEvent">
               <wlevs:class>com.bea.wlevs.event.example.FunctionCEP.TestEvent</wlevs:class>
          </wlevs:event-type>
     </wlevs:event-type-repository>
     <wlevs:adapter id="InputAdapter"
          class="com.bea.wlevs.adapter.example.FunctionCEP.InputAdapter">
          <wlevs:listener ref="inputStream" />
     </wlevs:adapter>
     <wlevs:channel id="inputStream" event-type="TestEvent">
          <wlevs:listener ref="processor" />
     </wlevs:channel>
     <wlevs:processor id="processor">
          <wlevs:listener ref="outputStream" />
          <wlevs:function function-name="sum_fxn" exec-method="execute">
          <bean>com.bea.wlevs.example.FunctionCEP.TestFunction</bean>
          </wlevs:function>
     </wlevs:processor>
     <wlevs:channel id="outputStream" event-type="TestEvent">
          <wlevs:listener ref="bean" />
     </wlevs:channel>
     <bean id="bean" class="com.bea.wlevs.example.FunctionCEP.OutputBean">
     </bean>
</beans>
Event class
package com.bea.wlevs.event.example.FunctionCEP;
public class TestEvent {
     private int num_1;
     private int num_2;
     private int sum_num;
     public int getSum_num() {
          return sum_num;
     public void setSum_num(int sumNum) {
          sum_num = sumNum;
     public int getNum_1() {
          return num_1;
     public void setNum_1(int num_1) {
          this.num_1 = num_1;
     public int getNum_2() {
          return num_2;
     public void setNum_2(int num_2) {
          this.num_2 = num_2;
Adapter class
package com.bea.wlevs.adapter.example.FunctionCEP;
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.event.example.FunctionCEP.TestEvent;
public class InputAdapter implements RunnableBean, StreamSource {
private StreamSender eventSender;
public InputAdapter() {
super();
public void run() {
     generateMessage();
private void generateMessage() {
     TestEvent event = new TestEvent();
     event.setNum_1(10);
     event.setNum_2(20);
     eventSender.sendInsertEvent(event);
public void setEventSender(StreamSender sender) {
eventSender = sender;
public synchronized void suspend() {
Output Bean class
package com.bea.wlevs.example.FunctionCEP;
import com.bea.wlevs.ede.api.StreamSink;
import com.bea.wlevs.event.example.FunctionCEP.TestEvent;
import com.bea.wlevs.util.Service;
public class OutputBean implements StreamSink {
     public void onInsertEvent(Object event) {
          System.out.println("In Output Bean");
          TestEvent event1 = new TestEvent();
          System.out.println("Num_1 is :: " + event1.getNum_1());
          System.out.println("Num_2 is :: " +event1.getNum_2());
          System.out.println("Sum of the numbers is :: " +event1.getSum_num());
Function Class
package com.bea.wlevs.example.FunctionCEP;
public class TestFunction {
     public Object execute(int num_1, int num_2)
          return (num_1 + num_2);
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>processor</name>
               <rules>
               <view id="v1" schema="num_1 num_2">
                    <![CDATA[
                         select num_1, num_2 from inputStream     
                    ]]>
               </view>
               <view id="v2" schema="num_1 num_2">
               <![CDATA[
               select sum_fxn(num_1,num_2), num_2 from inputStream // I am getting error when i am trying to call this function
               ]]>
               </view>
               <query id="q1">
                    <![CDATA[
                         select from v2[now] as num_2*     // Showing error while accessing the view also               ]]>
               </query>
          </rules>
     </processor>
</wlevs:config>
Error I am getting is :
Invalid statement: "select >>sum_fxn<<(num_1,num_2),age from inputStream"
Description: Invalid call to function or constructor: sum_fxn
Cause: Probable causes are: Function name sum_fxn(int,int) provided is invalid, or arguments are of
the wrong type., or Error while handling member access to complex type. Constructor sum_fxn of type
sum_fxn not found. or Probable causes are: Function name sum_fxn(int,int) provided is invalid, or
arguments are of the wrong type., or Error while handling member access to complex type.
Constructor sum_fxn of type sum_fxn not found.
Action: Verify function or constructor for complex type exists, is not ambiguous, and has the correct
number of parameters.
I have made a user defined function in a java class and configured this function in the EPN assembly file under the processor tag.
But when i am trying to access the function in the config.xml file , it is giving me an error in the query.
Please provide urgent help that how to write the exact query.

Answer 1

Hi,
In the EPN Assembly file use
<bean class="com.bea.wlevs.example.FunctionCEP.TestFunction"/>
instead of
<bean>com.bea.wlevs.example.FunctionCEP.TestFunction</bean>
Best Regards,
Sandeep