/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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.switchyard.component.common.knowledge.session;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicInteger;
import org.kie.api.KieBase;
import org.kie.api.KieBaseConfiguration;
import org.kie.api.KieServices;
import org.kie.api.builder.KieBuilder;
import org.kie.api.builder.KieFileSystem;
import org.kie.api.builder.Message;
import org.kie.api.builder.ReleaseId;
import org.kie.api.builder.Results;
import org.kie.api.persistence.jpa.KieStoreServices;
import org.kie.api.runtime.Environment;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.api.runtime.KieSessionConfiguration;
import org.kie.api.runtime.StatelessKieSession;
import org.switchyard.ServiceDomain;
import org.switchyard.SwitchYardException;
import org.switchyard.component.common.knowledge.CommonKnowledgeMessages;
import org.switchyard.component.common.knowledge.config.model.KnowledgeComponentImplementationModel;
import org.switchyard.component.common.knowledge.util.Channels;
import org.switchyard.component.common.knowledge.util.Configurations;
import org.switchyard.component.common.knowledge.util.Containers;
import org.switchyard.component.common.knowledge.util.Environments;
import org.switchyard.component.common.knowledge.util.Listeners;
import org.switchyard.component.common.knowledge.util.Loggers;
import org.switchyard.component.common.knowledge.util.Resources;
/**
* A Builder-based KnowledgeSessionFactory.
*
* @author David Ward <<a href="mailto:dward@jboss.org">dward@jboss.org</a>> © 2013 Red Hat Inc.
*/
class KnowledgeBuilderSessionFactory extends KnowledgeSessionFactory {
private static final AtomicInteger VERSION_COUNT = new AtomicInteger();
private static final String LINE_SEPARATOR;
static {
String lineSeparator;
try {
lineSeparator = System.getProperty("line.separator", "\n");
} catch (Throwable t) {
lineSeparator = "\n";
}
LINE_SEPARATOR = lineSeparator;
}
private final KieBase _base;
private final KieSessionConfiguration _sessionConfiguration;
KnowledgeBuilderSessionFactory(KnowledgeComponentImplementationModel model, ClassLoader loader, ServiceDomain domain, Properties propertyOverrides) {
super(model, loader, domain, propertyOverrides);
_base = newBase();
_sessionConfiguration = Configurations.getSessionConfiguration(getModel(), getLoader(), getPropertyOverrides());
}
/**
* {@inheritDoc}
*/
@Override
public KnowledgeSession newStatelessSession() {
StatelessKieSession stateless = _base.newStatelessKieSession(_sessionConfiguration);
KnowledgeDisposal loggersDisposal = Loggers.registerLoggersForDisposal(getModel(), getLoader(), stateless);
Listeners.registerListeners(getModel(), getLoader(), stateless);
Channels.registerChannels(getModel(), getLoader(), getDomain(), stateless);
return new KnowledgeSession(stateless, false, loggersDisposal);
}
/**
* {@inheritDoc}
*/
@Override
public KnowledgeSession newStatefulSession(Map<String, Object> environmentOverrides) {
Environment env = Environments.getEnvironment(environmentOverrides);
KieSession stateful = _base.newKieSession(_sessionConfiguration, env);
KnowledgeDisposal loggersDisposal = Loggers.registerLoggersForDisposal(getModel(), getLoader(), stateful);
Listeners.registerListeners(getModel(), getLoader(), stateful);
Channels.registerChannels(getModel(), getLoader(), getDomain(), stateful);
return new KnowledgeSession(stateful, false, false, loggersDisposal);
}
/**
* {@inheritDoc}
*/
@Override
public KnowledgeSession getPersistentSession(Map<String, Object> environmentOverrides, Integer sessionId) {
KieStoreServices kieStoreServices = KieServices.Factory.get().getStoreServices();
Environment env = Environments.getEnvironment(environmentOverrides);
KieSession stateful = null;
if (sessionId != null) {
stateful = kieStoreServices.loadKieSession(sessionId, _base, _sessionConfiguration, env);
}
if (stateful == null) {
stateful = kieStoreServices.newKieSession(_base, _sessionConfiguration, env);
}
KnowledgeDisposal loggersDisposal = Loggers.registerLoggersForDisposal(getModel(), getLoader(), stateful);
Listeners.registerListeners(getModel(), getLoader(), stateful);
Channels.registerChannels(getModel(), getLoader(), getDomain(), stateful);
return new KnowledgeSession(stateful, false, true, loggersDisposal);
}
private KieBase newBase() {
KieServices kieServices = KieServices.Factory.get();
ReleaseId releaseId = Containers.toReleaseId("org.switchyard.tmp", "app", String.valueOf(VERSION_COUNT.incrementAndGet()));
KieFileSystem kieFileSystem = kieServices.newKieFileSystem().generateAndWritePomXML(releaseId);
Resources.addResources(getModel(), getLoader(), kieFileSystem);
KieBuilder kieBuilder = kieServices.newKieBuilder(kieFileSystem).buildAll();
Results results = kieBuilder.getResults();
if (results.hasMessages(Message.Level.ERROR)) {
StringBuilder sb = new StringBuilder(CommonKnowledgeMessages.MESSAGES.problemBuildingKnowledge());
for (Message message : results.getMessages(Message.Level.ERROR)) {
sb.append(LINE_SEPARATOR);
sb.append(message.toString().trim());
}
throw new SwitchYardException(sb.toString());
}
/* kieBuilder.buildAll() above already adds the kieModule (with our releaseId) to the kieRepository.
KieModule kieModule = kieBuilder.getKieModule();
kieServices.getRepository().addKieModule(kieModule);
*/
KieContainer kieContainer = kieServices.newKieContainer(releaseId);
KieBaseConfiguration kieBaseConfiguration = Configurations.getBaseConfiguration(getModel(), getLoader(), getPropertyOverrides());
return kieContainer.newKieBase(kieBaseConfiguration);
}
}