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Drools and jBPM integration for Aries Blueprint
/*
* Copyright 2013 Red Hat, Inc. and/or its affiliates.
*
* 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.kie.aries.blueprint.namespace;
import org.apache.aries.blueprint.BeanProcessor;
import org.apache.aries.blueprint.ParserContext;
import org.apache.aries.blueprint.PassThroughMetadata;
import org.apache.aries.blueprint.mutable.MutableBeanArgument;
import org.apache.aries.blueprint.mutable.MutablePassThroughMetadata;
import org.drools.compiler.kie.builder.impl.ClasspathKieProject;
import org.drools.compiler.kie.builder.impl.InternalKieModule;
import org.drools.compiler.kie.builder.impl.KieBuilderImpl;
import org.drools.compiler.kie.builder.impl.KieRepositoryImpl;
import org.drools.compiler.kproject.ReleaseIdImpl;
import org.drools.compiler.kproject.models.KieBaseModelImpl;
import org.drools.compiler.kproject.models.KieModuleModelImpl;
import org.drools.compiler.kproject.models.KieSessionModelImpl;
import org.kie.api.KieServices;
import org.kie.api.builder.ReleaseId;
import org.kie.api.builder.model.KieModuleModel;
import org.kie.api.builder.model.KieSessionModel;
import org.kie.api.conf.DeclarativeAgendaOption;
import org.kie.api.conf.EqualityBehaviorOption;
import org.kie.api.conf.EventProcessingOption;
import org.kie.api.runtime.conf.ClockTypeOption;
import org.kie.aries.blueprint.factorybeans.Initializable;
import org.kie.aries.blueprint.factorybeans.KBaseOptions;
import org.kie.aries.blueprint.factorybeans.KSessionOptions;
import org.kie.aries.blueprint.factorybeans.KieObjectsFactoryBean;
import org.osgi.framework.Bundle;
import org.osgi.framework.FrameworkUtil;
import org.osgi.service.blueprint.container.BlueprintContainer;
import org.osgi.service.blueprint.reflect.BeanArgument;
import org.osgi.service.blueprint.reflect.BeanMetadata;
import org.osgi.service.blueprint.reflect.ComponentMetadata;
import org.osgi.service.blueprint.reflect.ValueMetadata;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class KieObjectsInjector implements BeanProcessor {
private static final Logger log = LoggerFactory.getLogger(KieObjectsInjector.class);
private BlueprintContainer blueprintContainer;
private String contextId;
private String configFilePath;
private ReleaseId releaseId;
private URL configFileURL;
private ParserContext parserContext;
private BlueprintContextHelper context;
/** The list of Aries Blueprint XML files*/
protected java.util.List resources;
public KieObjectsInjector(List resources) {
this.resources = resources;
}
public KieObjectsInjector(String contextId) {
this.contextId = contextId;
}
public KieObjectsInjector(String contextId, ParserContext parserContext) {
this.contextId = contextId;
this.parserContext = parserContext;
}
public KieObjectsInjector(List resources, String contextId) {
this.resources = resources;
this.contextId = contextId;
}
public KieObjectsInjector() { }
public void setBlueprintContainer(BlueprintContainer blueprintContainer) {
this.blueprintContainer = blueprintContainer;
this.context = new BlueprintContextHelper( blueprintContainer );
}
public void afterKmoduleSet() {
log.debug(" :: Starting Blueprint KieObjectsInjector for kmodule ("+contextId+") :: ");
if ( resources == null || resources.isEmpty()) {
configFileURL = getClass().getResource("/");
if (configFileURL == null) {
createOsgiKieModule();
return;
}
configFilePath = configFileURL.getPath();
} else {
configFileURL = resources.get(0);
configFilePath = configFileURL.getPath();
log.debug(" :: Trying to intialize the KieModule from " + configFileURL + " :: ");
}
if ( configFilePath == null) {
throw new RuntimeException("Failure creating a KieModule. Unable to determine the Configuration File Path.");
}
String pomProperties = ClasspathKieProject.getPomProperties(configFilePath);
releaseId = ReleaseIdImpl.fromPropertiesString(pomProperties);
KieModuleModel kieModuleModel = getKieModuleModel();
injectKieModule(kieModuleModel);
addKieModuleToRepo(kieModuleModel);
log.debug(" :: Completed Injecting KieObjects from the Blueprint Bean Processor ("+contextId+") :: ");
}
protected void injectKieModule(KieModuleModel kieModuleModel) {
ComponentMetadata componentMetadata = blueprintContainer.getComponentMetadata(contextId);
if ( componentMetadata instanceof MutablePassThroughMetadata){
((MutablePassThroughMetadata)componentMetadata).setObject(kieModuleModel);
}
}
public void afterImportSet() {
// no-op
}
private void createOsgiKieModule() {
configFileURL = getConfigFileURL();
if (releaseId == null) {
releaseId = KieRepositoryImpl.INSTANCE.getDefaultReleaseId();
}
KieModuleModel kieModuleModel = getKieModuleModel();
KieBuilderImpl.setDefaultsforEmptyKieModule(kieModuleModel);
injectKieModule(kieModuleModel);
InternalKieModule internalKieModule = createOsgiKModule(kieModuleModel);
if ( internalKieModule != null ) {
KieServices ks = KieServices.Factory.get();
ks.getRepository().addKieModule(internalKieModule);
log.info(" :: Added KieModule From KieObjectsInjector ::");
}
}
private URL getConfigFileURL() {
try {
Method m = Class.forName(blueprintContainer.getClass().getName(),
true,
blueprintContainer.getClass().getClassLoader())
.getMethod("getBundle");
Bundle bundle = (Bundle)m.invoke(blueprintContainer);
return bundle.getEntry("/");
} catch (Exception e) { }
return FrameworkUtil.getBundle(this.getClass()).getEntry("/");
}
private InternalKieModule createOsgiKModule(KieModuleModel kieProject) {
Method m;
try {
Class c = Class.forName(ClasspathKieProject.OSGI_KIE_MODULE_CLASS_NAME, true, KieBuilderImpl.class.getClassLoader());
m = c.getMethod("create", URL.class, ReleaseId.class, KieModuleModel.class);
} catch (Exception e) {
throw new RuntimeException("It is necessary to have the drools-osgi-integration module on the path in order to create a KieProject from an osgi bundle", e);
}
try {
return (InternalKieModule) m.invoke(null, configFileURL, releaseId, kieProject);
} catch (Exception e) {
throw new RuntimeException("Failure creating a OsgiKieModule caused by: " + e.getMessage(), e);
}
}
protected void addKieModuleToRepo(KieModuleModel kieModuleModel) {
String rootPath = configFilePath;
if ( rootPath.lastIndexOf( ':' ) >= 2 ) { // avoid to trucate Windows paths like C:\my\folder\...
rootPath = configFilePath.substring( rootPath.lastIndexOf( ':' ) + 1 );
}
KieBuilderImpl.setDefaultsforEmptyKieModule(kieModuleModel);
InternalKieModule internalKieModule = ClasspathKieProject.createInternalKieModule(kieModuleModel, releaseId, rootPath);
if ( internalKieModule != null ) {
KieServices ks = KieServices.Factory.get();
ks.getRepository().addKieModule(internalKieModule);
log.info(" :: Added KieModule From KieObjectsInjector ::");
}
}
protected KieModuleModel getKieModuleModel() {
KieModuleModelImpl kieModuleModel = new KieModuleModelImpl();
Set ids = blueprintContainer.getComponentIds();
for (String id: ids) {
ComponentMetadata componentMetadata = blueprintContainer.getComponentMetadata(id);
if ( componentMetadata instanceof BeanMetadata) {
BeanMetadata metadata = (BeanMetadata)componentMetadata;
if (KieObjectsFactoryBean.class.getName().equals(metadata.getClassName())) {
if ("fetchKBase".equalsIgnoreCase(metadata.getFactoryMethod())) {
BeanArgument kbRefArg = metadata.getArguments().get(0);
String kBaseName = ((ValueMetadata) kbRefArg.getValue()).getStringValue();
KieBaseModelImpl kBase = new KieBaseModelImpl();
kBase.setKModule(kieModuleModel);
kBase.setName(kBaseName);
BeanArgument kbOptionsArg = metadata.getArguments().get(2);
PassThroughMetadata passThroughMetadata = (PassThroughMetadata) kbOptionsArg.getValue();
KBaseOptions kBaseOptions = (KBaseOptions) passThroughMetadata.getObject();
String packages = kBaseOptions.getPackages();
if ( !kBaseOptions.getPackages().isEmpty()) {
for ( String pkg : packages.split( "," ) ) {
kBase.addPackage( pkg.trim() );
}
}
String includes = kBaseOptions.getIncludes();
if ( !includes.isEmpty() ) {
for ( String include : includes.split( "," ) ) {
kBase.addInclude( include.trim() );
}
}
String equalsBehavior = kBaseOptions.getEqualsBehavior();
if ( !equalsBehavior.isEmpty() ) {
kBase.setEqualsBehavior( EqualityBehaviorOption.determineEqualityBehavior(equalsBehavior) );
}
String eventProcessingMode = kBaseOptions.getEventProcessingMode();
if ( !eventProcessingMode.isEmpty() ) {
kBase.setEventProcessingMode( EventProcessingOption.determineEventProcessingMode(eventProcessingMode) );
}
String declarativeAgenda = kBaseOptions.getDeclarativeAgenda();
if ( !declarativeAgenda.isEmpty() ) {
kBase.setDeclarativeAgenda( DeclarativeAgendaOption.determineDeclarativeAgenda(declarativeAgenda) );
}
kieModuleModel.getRawKieBaseModels().put(kBase.getName(), kBase);
MutablePassThroughMetadata throughMetadata = parserContext.createMetadata(MutablePassThroughMetadata.class);
throughMetadata.setObject(releaseId);
((MutableBeanArgument)metadata.getArguments().get(1)).setValue(throughMetadata);
addKieSessionModels(kBase);
}
}
}
}
return kieModuleModel;
}
private void addKieSessionModels(KieBaseModelImpl kieBaseModel) {
Set ids = blueprintContainer.getComponentIds();
for (String id: ids) {
ComponentMetadata componentMetadata = blueprintContainer.getComponentMetadata(id);
if ( componentMetadata instanceof BeanMetadata) {
BeanMetadata metadata = (BeanMetadata)componentMetadata;
if (KieObjectsFactoryBean.class.getName().equals(metadata.getClassName())) {
if ("createKieSession".equalsIgnoreCase(metadata.getFactoryMethod())){
BeanArgument beanArgument = metadata.getArguments().get(0);
String ksessionName = ((ValueMetadata)beanArgument.getValue()).getStringValue();
BeanArgument kbOptionsArg = metadata.getArguments().get(5);
PassThroughMetadata passThroughMetadata = (PassThroughMetadata) kbOptionsArg.getValue();
KSessionOptions kSessionOptions = (KSessionOptions) passThroughMetadata.getObject();
String type = kSessionOptions.getType();
String kbaseRef = kSessionOptions.getkBaseRef();
if( kbaseRef.equalsIgnoreCase(kieBaseModel.getName())) {
KieSessionModelImpl kSession = new KieSessionModelImpl(kieBaseModel, ksessionName);
kSession.setType(type != null ? KieSessionModel.KieSessionType.valueOf(type.toUpperCase()) : KieSessionModel.KieSessionType.STATEFUL);
kSession.setDefault( "true".equals( kSessionOptions.getDef() ) );
String clockType = kSessionOptions.getClockType();
if ( clockType != null && !clockType.isEmpty() ) {
kSession.setClockType( ClockTypeOption.get(clockType) );
}
String scope = kSessionOptions.getScope();
if ( scope !=null && !scope.isEmpty() ) {
kSession.setScope( scope.trim() );
}
Map rawKieSessionModels = kieBaseModel.getRawKieSessionModels();
rawKieSessionModels.put(kSession.getName(), kSession);
MutablePassThroughMetadata throughMetadata = parserContext.createMetadata(MutablePassThroughMetadata.class);
throughMetadata.setObject(releaseId);
((MutableBeanArgument)metadata.getArguments().get(1)).setValue(throughMetadata);
}
}
}
}
}
}
@Override
public Object beforeInit(Object o, String s, BeanCreator beanCreator, BeanMetadata beanMetadata) {
return o;
}
@Override
public Object afterInit(Object o, String s, BeanCreator beanCreator, BeanMetadata beanMetadata) {
try {
return o instanceof Initializable ? ( (Initializable) o ).init( context ) : o;
} catch (Exception e) {
throw new RuntimeException( e );
}
}
@Override
public void beforeDestroy(Object o, String s) {
}
@Override
public void afterDestroy(Object o, String s) {
}
}
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