/*
* 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.persistence.jpa;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Properties;
import org.drools.KnowledgeBase;
import org.drools.SessionConfiguration;
import org.drools.command.CommandService;
import org.drools.command.impl.CommandBasedStatefulKnowledgeSession;
import org.drools.persistence.SingleSessionCommandService;
import org.drools.persistence.jpa.processinstance.JPAWorkItemManagerFactory;
import org.drools.process.instance.WorkItemManagerFactory;
import org.drools.runtime.CommandExecutor;
import org.drools.runtime.Environment;
import org.drools.runtime.KnowledgeSessionConfiguration;
import org.drools.runtime.StatefulKnowledgeSession;
public class KnowledgeStoreServiceImpl
implements
KnowledgeStoreService {
private Class< ? extends CommandExecutor> commandServiceClass;
private Class< ? extends WorkItemManagerFactory> workItemManagerFactoryClass;
private Properties configProps = new Properties();
public KnowledgeStoreServiceImpl() {
setDefaultImplementations();
}
protected void setDefaultImplementations() {
setCommandServiceClass( SingleSessionCommandService.class );
setProcessInstanceManagerFactoryClass( "org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory" );
setWorkItemManagerFactoryClass( JPAWorkItemManagerFactory.class );
setProcessSignalManagerFactoryClass( "org.jbpm.persistence.processinstance.JPASignalManagerFactory" );
}
public StatefulKnowledgeSession newStatefulKnowledgeSession(KnowledgeBase kbase,
KnowledgeSessionConfiguration configuration,
Environment environment) {
if ( configuration == null ) {
configuration = new SessionConfiguration();
}
if ( environment == null ) {
throw new IllegalArgumentException( "Environment cannot be null" );
}
return new CommandBasedStatefulKnowledgeSession( (CommandService) buildCommandService( kbase,
mergeConfig( configuration ),
environment ) );
}
public StatefulKnowledgeSession loadStatefulKnowledgeSession(int id,
KnowledgeBase kbase,
KnowledgeSessionConfiguration configuration,
Environment environment) {
if ( configuration == null ) {
configuration = new SessionConfiguration();
}
if ( environment == null ) {
throw new IllegalArgumentException( "Environment cannot be null" );
}
return new CommandBasedStatefulKnowledgeSession( (CommandService) buildCommandService( id,
kbase,
mergeConfig( configuration ),
environment ) );
}
private CommandExecutor buildCommandService(Integer sessionId,
KnowledgeBase kbase,
KnowledgeSessionConfiguration conf,
Environment env) {
try {
Class< ? extends CommandExecutor> serviceClass = getCommandServiceClass();
Constructor< ? extends CommandExecutor> constructor = serviceClass.getConstructor( Integer.class,
KnowledgeBase.class,
KnowledgeSessionConfiguration.class,
Environment.class );
return constructor.newInstance( sessionId,
kbase,
conf,
env );
} catch ( SecurityException e ) {
throw new IllegalStateException( e );
} catch ( NoSuchMethodException e ) {
throw new IllegalStateException( e );
} catch ( IllegalArgumentException e ) {
throw new IllegalStateException( e );
} catch ( InstantiationException e ) {
throw new IllegalStateException( e );
} catch ( IllegalAccessException e ) {
throw new IllegalStateException( e );
} catch ( InvocationTargetException e ) {
throw new IllegalStateException( e );
}
}
private CommandExecutor buildCommandService(KnowledgeBase kbase,
KnowledgeSessionConfiguration conf,
Environment env) {
Class< ? extends CommandExecutor> serviceClass = getCommandServiceClass();
try {
Constructor< ? extends CommandExecutor> constructor = serviceClass.getConstructor( KnowledgeBase.class,
KnowledgeSessionConfiguration.class,
Environment.class );
return constructor.newInstance( kbase,
conf,
env );
} catch ( SecurityException e ) {
throw new IllegalStateException( e );
} catch ( NoSuchMethodException e ) {
throw new IllegalStateException( e );
} catch ( IllegalArgumentException e ) {
throw new IllegalStateException( e );
} catch ( InstantiationException e ) {
throw new IllegalStateException( e );
} catch ( IllegalAccessException e ) {
throw new IllegalStateException( e );
} catch ( InvocationTargetException e ) {
throw new IllegalStateException( e );
}
}
private KnowledgeSessionConfiguration mergeConfig(KnowledgeSessionConfiguration configuration) {
((SessionConfiguration) configuration).addDefaultProperties(configProps);
((SessionConfiguration) configuration).setTimerJobFactoryManager( new JpaTimeJobFactoryManager( ) );
return configuration;
}
public long getStatefulKnowledgeSessionId(StatefulKnowledgeSession ksession) {
if ( ksession instanceof CommandBasedStatefulKnowledgeSession ) {
SingleSessionCommandService commandService = (SingleSessionCommandService) ((CommandBasedStatefulKnowledgeSession) ksession).getCommandService();
return commandService.getSessionId();
}
throw new IllegalArgumentException( "StatefulKnowledgeSession must be an a CommandBasedStatefulKnowledgeSession" );
}
public void setCommandServiceClass(Class< ? extends CommandExecutor> commandServiceClass) {
if ( commandServiceClass != null ) {
this.commandServiceClass = commandServiceClass;
configProps.put( "drools.commandService",
commandServiceClass.getName() );
}
}
public Class< ? extends CommandExecutor> getCommandServiceClass() {
return commandServiceClass;
}
public void setProcessInstanceManagerFactoryClass(String processInstanceManagerFactoryClass) {
configProps.put( "drools.processInstanceManagerFactory",
processInstanceManagerFactoryClass );
}
public void setWorkItemManagerFactoryClass(Class< ? extends WorkItemManagerFactory> workItemManagerFactoryClass) {
if ( workItemManagerFactoryClass != null ) {
this.workItemManagerFactoryClass = workItemManagerFactoryClass;
configProps.put( "drools.workItemManagerFactory",
workItemManagerFactoryClass.getName() );
}
}
public Class< ? extends WorkItemManagerFactory> getWorkItemManagerFactoryClass() {
return workItemManagerFactoryClass;
}
public void setProcessSignalManagerFactoryClass(String processSignalManagerFactoryClass) {
configProps.put( "drools.processSignalManagerFactory",
processSignalManagerFactoryClass );
}
}