/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.examples.broker;
import org.drools.examples.broker.events.Event;
import org.drools.examples.broker.events.EventReceiver;
import org.drools.examples.broker.model.Company;
import org.drools.examples.broker.model.CompanyRegistry;
import org.drools.examples.broker.model.StockTick;
import org.drools.examples.broker.ui.BrokerWindow;
import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.api.runtime.rule.EntryPoint;
/**
* The broker application
*/
public class Broker implements EventReceiver, BrokerServices {
private BrokerWindow window;
private CompanyRegistry companies;
private KieSession session;
private EntryPoint tickStream;
public Broker(BrokerWindow window,
CompanyRegistry companies) {
super();
this.window = window;
this.companies = companies;
this.session = createSession();
this.tickStream = this.session.getEntryPoint( "StockTick stream" );
}
@SuppressWarnings("unchecked")
public void receive(Event<?> event) {
try {
StockTick tick = ((Event<StockTick>) event).getObject();
Company company = this.companies.getCompany( tick.getSymbol() );
this.tickStream.insert( tick );
this.session.getAgenda().getAgendaGroup( "evaluation" ).setFocus();
this.session.fireAllRules();
window.updateCompany( company.getSymbol() );
window.updateTick( tick );
} catch ( Exception e ) {
System.err.println("=============================================================");
System.err.println("Unexpected exception caught: "+e.getMessage() );
e.printStackTrace();
}
}
private KieSession createSession() {
KieServices ks = KieServices.Factory.get();
KieContainer kc = ks.getKieClasspathContainer();
session = kc.newKieSession("BrokerKS");
session.setGlobal( "services", this );
for( Company company : this.companies.getCompanies() ) {
session.insert( company );
}
session.fireAllRules();
return session;
}
public void log(String message) {
window.log( message );
}
}