How to fetch the data from databse table and get the required output

Question

Hi,
I have made a project that connects CEP to database table but i m getting some problem in fetching the data from database.
From the following code :
If the where condition is removed then the application runs fine but i am still not able to fetch the data from the table because it is not showing any output.
Can anyone please suggest me that how to write WHERE statement correctly and how i will be able to see the output.
Following is the config.xml for processor:
======================================
<?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>JDBC_Processor</name>
          <rules>
               <query id="q1"><![CDATA[
                         SELECT STOCK.SYMBOL as symbol, STOCK.EXCHANGE as exchange
                         FROM ExchangeStream [Now] as datastream, STOCK
                         WHERE datastream.SYMBOL = datastream.SYMBOL ]]></query>
          </rules>
     </processor>
     <jms-adapter>
          <name>JMS_IN_Adapter</name>
          <jndi-provider-url>t3://CHDSEZ135400D:7001</jndi-provider-url>
          <destination-jndi-name>jms.TestKanikaQueue</destination-jndi-name>
          <user>weblogic</user>
          <password>welcome1</password>
     </jms-adapter>
</wlevs:config>
Following is the 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="StockEvent">
               <wlevs:properties>
                    <wlevs:property name="SYMBOL" type="byte[]" length="16" />
                    <wlevs:property name="EXCHANGE" type="byte[]" length="16" />
               </wlevs:properties>
          </wlevs:event-type>
          <wlevs:event-type type-name="ExchangeEvent">
               <wlevs:class>com.bea.wlevs.event.example.JDBC_CEP.ExchangeEvent</wlevs:class>
          </wlevs:event-type>
          <wlevs:event-type type-name="StockExchangeEvent">
               <wlevs:properties>
                    <wlevs:property name="symbol" type="byte[]" length="16" />
                    <wlevs:property name="price" type="byte[]" length="16" />
                    <wlevs:property name="exchange" type="byte[]" length="16" />
               </wlevs:properties>
          </wlevs:event-type>
     </wlevs:event-type-repository>
     <bean id="readConverter" class="com.bea.wlevs.adapter.example.JDBC_CEP.Adapter_JDBC" />
     <bean id="outputJDBCBean" class="com.bea.wlevs.bean.example.JDBC_CEP.OutputBean_JDBC">
     </bean>
     <wlevs:adapter id="JMS_IN_Adapter" provider="jms-inbound">
          <wlevs:listener ref="ExchangeStream" />
          <wlevs:instance-property name="converterBean"
               ref="readConverter" />
     </wlevs:adapter>
     <wlevs:processor id="JDBC_Processor" advertise="true">
          <wlevs:listener ref="OutputChannel" />
          <wlevs:table-source ref="STOCK" />
     </wlevs:processor>
     <wlevs:channel id="ExchangeStream" event-type="ExchangeEvent" advertise="true">
          <wlevs:listener ref="JDBC_Processor" />
     </wlevs:channel>
     <wlevs:channel id="OutputChannel" event-type="StockExchangeEvent"
          advertise="true">
          <wlevs:listener ref="outputJDBCBean" />
     </wlevs:channel>
     <wlevs:table id="STOCK" event-type="StockEvent"
          data-source="StockDs" table-name="STOCK" />
     <wlevs:table id="STOCK_EXCHANGE" event-type="StockExchangeEvent"
          data-source="StockDs" table-name="STOCK_EXCHANGE" />
</beans>
ExchangeEvent.java:
package com.bea.wlevs.event.example.JDBC_CEP;
public class ExchangeEvent {
     public String SYMBOL;
     public String symbol;
     public String exchange;
     public ExchangeEvent() {
     public String getSYMBOL() {
          return SYMBOL;
     public void setSYMBOL(String sYMBOL) {
          SYMBOL = sYMBOL;
     public String getSymbol() {
          return symbol;
     public void setSymbol(String symbol) {
          this.symbol = symbol;
     public String getExchange() {
          return exchange;
     public void setExchange(String price) {
          this.exchange = price;
Adapter Class:
package com.bea.wlevs.adapter.example.JDBC_CEP;
import com.bea.wlevs.adapter.example.JDBC_CEP.MyLogger;
import com.bea.wlevs.adapters.jms.api.InboundMessageConverter;
import java.text.DateFormat;
import java.util.Date;
import com.bea.wlevs.adapters.jms.api.MessageConverterException;
import com.bea.wlevs.event.example.JDBC_CEP.ExchangeEvent;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.TextMessage;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
     public class Adapter_JDBC implements InboundMessageConverter{
     @SuppressWarnings("unchecked")
     public List convert(Message message) throws MessageConverterException, JMSException {
          Random rand = new Random();
          int unique_id = rand.nextInt();
          DateFormat dateFormat;
          dateFormat = DateFormat.getTimeInstance();
          dateFormat.format(new Date());
          MyLogger.info(unique_id + " CEP Start Time is: " + dateFormat.format(new Date()));
          System.out.println("Message from the Queue is :"+ message);
          TextMessage textMessage = (TextMessage) message;
          String stringMessage = textMessage.getText().toString();
          System.out.println("Message after getting converted into String is :"+ stringMessage);
               String[] results = stringMessage.split(",\\s*"); // split on commas
               ExchangeEvent event1 = new ExchangeEvent();
               event1.setSYMBOL(results[0]);
     List events = new ArrayList(2);
     events.add(event1);
     return events;
Output Bean Class :
package com.bea.wlevs.bean.example.JDBC_CEP;
import com.bea.wlevs.ede.api.StreamSink;
import com.bea.wlevs.event.example.JDBC_CEP.ExchangeEvent;
import com.bea.core.datasource.DataSourceService;
public class OutputBean_JDBC implements StreamSink{
     public void onInsertEvent(Object event) {
     if (event instanceof ExchangeEvent) {
          ExchangeEvent cacheEvent = (ExchangeEvent) event;
     System.out.println("Symbol is: " + cacheEvent.getSymbol());
     System.out.println("Exchange is: " + cacheEvent.getExchange());
     System.out.println(DataSourceService.class.getClass());
Kindly let me know if you need further info.

Answer 1

Do you have StockDs configured in your server config.xml?
I think the query should look more like this:
SELECT stocks.SYMBOL, stocks.EXCHANGE
FROM STOCK as stocks, ExchangeStream [Now] as datastream WHERE stocks.SYMBOL = datastream.SYMBOL
Thanks
andy