How can I access the Oracle CEP from the a simple java code

Question

I want to access the current values in coherence cache and show those in a screen. So for that I want to create a java class which can access the Coherence cache of the CEP application and get the current values in the Cache.
Do anyone had any sample code for this, or any idea how to do this.

Answer 1

As mentioned, you can use Spring to pass a reference to your cache to an event bean as shown below.
Once you have a reference to the cache you can use whatever Coherence APIs you need.
For example: get an object based on the key, perform an invoke, or a query to get the values that you want to display.
Here's some sample code:
IN EPN
<wlevs:caching-system id="CoherenceCachingSystem" provider="coherence" />
<wlevs:cache id="TransactionCache" caching-system="CoherenceCachingSystem"
          value-type="TransactionAmount" key-class="com.oracle.poc.event.TransactionAmountKey">                                   
</wlevs:cache>
<wlevs:event-bean id="TransactionCacheQuery" class="com.oracle.cep.eventbeans.TransactionCacheQuery">
     <wlevs:listener ref="P1TotalChannel" />
     <wlevs:instance-property name="transactionCache" ref="TransactionCache" />
</wlevs:event-bean>
EVENT BEAN:
import com.tangosol.net.NamedCache;
import com.tangosol.util.aggregator.DoubleSum;
import com.tangosol.util.filter.EqualsFilter;
public class TransactionCacheQuery implements StreamSource, StreamSink {
     private StreamSender streamSender_;
     @SuppressWarnings("unchecked")
     private Map transactionCache;     
     @SuppressWarnings("unchecked")
     public void setTransactionCache(Map transactionCache) {
          this.transactionCache = transactionCache;
     public void setEventSender(StreamSender sender) {
          streamSender_ = sender;
     public void onInsertEvent(Object event) throws EventRejectedException {
          if (event != null){
               if (event instanceof MyEvent){
                    MyEvent my = (MyEvent)event ;
                    NamedCache cache = (NamedCache)transactionCache ;
                    Object totalAmount = cache.aggregate(
                              new EqualsFilter("getACCT_NUMBER", my.getACCT_NUMBER()),
                              new DoubleSum("getAmount"));
                    double transactionsTotal = 0.00 ;
                    if (totalAmount instanceof Double){
                         transactionsTotal = ((Double)totalAmount).doubleValue();
                    my.setTransactionsTotal(transactionsTotal);
                    // send new event to the processor
                    streamSender_.sendInsertEvent(my);     
}