/*
* 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.infinispan;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Properties;
import org.drools.core.SessionConfiguration;
import org.drools.core.command.CommandService;
import org.drools.core.command.Interceptor;
import org.drools.core.command.impl.CommandBasedStatefulKnowledgeSession;
import org.drools.core.process.instance.WorkItemManagerFactory;
import org.drools.core.time.TimerService;
import org.drools.persistence.SingleSessionCommandService;
import org.drools.persistence.infinispan.processinstance.InfinispanWorkItemManagerFactory;
import org.drools.persistence.jta.JtaTransactionManager;
import org.kie.api.KieBase;
import org.kie.api.persistence.jpa.KieStoreServices;
import org.kie.api.runtime.CommandExecutor;
import org.kie.api.runtime.Environment;
import org.kie.api.runtime.EnvironmentName;
import org.kie.api.runtime.KieSessionConfiguration;
import org.kie.internal.KnowledgeBaseFactory;
import org.kie.internal.runtime.StatefulKnowledgeSession;
public class KnowledgeStoreServiceImpl
implements
KieStoreServices {
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.InfinispanProcessInstanceManagerFactory" );
setWorkItemManagerFactoryClass( InfinispanWorkItemManagerFactory.class );
setProcessSignalManagerFactoryClass( "org.jbpm.persistence.processinstance.InfinispanSignalManagerFactory" );
setTimerServiceClass(InfinispanJDKTimerService.class);
}
public StatefulKnowledgeSession newKieSession(KieBase kbase,
KieSessionConfiguration configuration,
Environment environment) {
if ( configuration == null ) {
configuration = new SessionConfiguration();
}
if ( environment == null ) {
throw new IllegalArgumentException( "Environment cannot be null" );
}
CommandService commandService = (CommandService) buildCommandService( kbase, mergeConfig( configuration ), environment );
if (commandService instanceof SingleSessionCommandService) {
((SingleSessionCommandService) commandService).
addInterceptor(new ManualPersistInterceptor((SingleSessionCommandService) commandService));
try {
Class<?> clazz = Class.forName("org.jbpm.persistence.ManualPersistProcessInterceptor");
Constructor<?> c = clazz.getConstructor(SingleSessionCommandService.class);
Interceptor interceptor = (Interceptor) c.newInstance(commandService);
((SingleSessionCommandService) commandService).addInterceptor(interceptor);
} catch (ClassNotFoundException e) {
//Expected of non-jbpm based projects
} catch (Exception e) {
//something unexpected happened
throw new RuntimeException("Something wrong initializing manual process persistor interceptor", e);
}
}
return new CommandBasedStatefulKnowledgeSession( commandService );
}
public StatefulKnowledgeSession loadKieSession(int id,
KieBase kbase,
KieSessionConfiguration configuration,
Environment environment) {
if ( configuration == null ) {
configuration = new SessionConfiguration();
}
if ( environment == null ) {
throw new IllegalArgumentException( "Environment cannot be null" );
}
CommandService commandService = (CommandService) buildCommandService( id, kbase, mergeConfig( configuration ), environment );
if (commandService instanceof SingleSessionCommandService) {
((SingleSessionCommandService) commandService).
addInterceptor(new ManualPersistInterceptor((SingleSessionCommandService) commandService));
try {
Class<?> clazz = Class.forName("org.jbpm.persistence.ManualPersistProcessInterceptor");
Constructor<?> c = clazz.getConstructor(SingleSessionCommandService.class);
Interceptor interceptor = (Interceptor) c.newInstance(commandService);
((SingleSessionCommandService) commandService).addInterceptor(interceptor);
} catch (ClassNotFoundException e) {
//Expected of non-jbpm based projects
} catch (Exception e) {
//something unexpected happened
throw new RuntimeException("Something wrong initializing manual process persistor interceptor", e);
}
}
return new CommandBasedStatefulKnowledgeSession( commandService );
}
private CommandExecutor buildCommandService(Integer sessionId,
KieBase kbase,
KieSessionConfiguration conf,
Environment env) {
env = mergeEnvironment(env);
try {
Class< ? extends CommandExecutor> serviceClass = getCommandServiceClass();
Constructor< ? extends CommandExecutor> constructor = serviceClass.getConstructor( Integer.class,
KieBase.class,
KieSessionConfiguration.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 Environment mergeEnvironment(Environment env) {
if (env == null) {
env = KnowledgeBaseFactory.newEnvironment();
}
if (env.get(EnvironmentName.PERSISTENCE_CONTEXT_MANAGER) == null) {
try {
Class<?> clazz = Class.forName("org.jbpm.persistence.InfinispanProcessPersistenceContextManager");
Constructor<?> c = clazz.getConstructor(Environment.class);
env.set(EnvironmentName.PERSISTENCE_CONTEXT_MANAGER, c.newInstance(env));
} catch (ClassNotFoundException e) {
env.set(EnvironmentName.PERSISTENCE_CONTEXT_MANAGER, new InfinispanPersistenceContextManager(env));
} catch (Exception e) {
e.printStackTrace();
env.set(EnvironmentName.PERSISTENCE_CONTEXT_MANAGER, new InfinispanPersistenceContextManager(env));
}
}
Object tm = env.get(EnvironmentName.TRANSACTION_MANAGER);
if (tm != null && tm instanceof javax.transaction.TransactionManager) {
Object ut = env.get(EnvironmentName.TRANSACTION);
if (ut == null && tm instanceof javax.transaction.Transaction) {
ut = tm;
}
Object tsr = env.get(EnvironmentName.TRANSACTION_SYNCHRONIZATION_REGISTRY);
env.set(EnvironmentName.TRANSACTION_MANAGER, new JtaTransactionManager(ut, tsr, tm));
}
return env;
}
private CommandExecutor buildCommandService(KieBase kbase,
KieSessionConfiguration conf,
Environment env) {
env = mergeEnvironment(env);
Class< ? extends CommandExecutor> serviceClass = getCommandServiceClass();
try {
Constructor< ? extends CommandExecutor> constructor = serviceClass.getConstructor( KieBase.class,
KieSessionConfiguration.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 KieSessionConfiguration mergeConfig(KieSessionConfiguration configuration) {
((SessionConfiguration) configuration).addDefaultProperties(configProps);
try {
java.lang.reflect.Field field = SessionConfiguration.class.getDeclaredField("timerJobFactoryManager");
field.setAccessible(true);
Object obj = field.get(configuration);
if (obj == null) {
field.set(configuration, new InfinispanTimeJobFactoryManager());
}
} catch (Exception e) {
throw new IllegalStateException("Couldn't set TimeJobFactoryManager", e);
}
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 void setTimerServiceClass(Class<? extends TimerService> timerServiceClass) {
configProps.put("drools.timerService", timerServiceClass.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 );
}
}