/*
* Copyright 2015 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.
*
* 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.server.services.drools;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.Set;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import org.kie.api.remote.Remotable;
import org.kie.scanner.KieModuleMetaData;
import org.kie.server.api.KieServerConstants;
import org.kie.server.services.api.KieContainerCommandService;
import org.kie.server.services.api.KieContainerInstance;
import org.kie.server.services.api.KieServerApplicationComponentsService;
import org.kie.server.services.api.KieServerExtension;
import org.kie.server.services.api.KieServerRegistry;
import org.kie.server.services.api.SupportedTransports;
import org.kie.server.services.impl.KieServerImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DroolsKieServerExtension implements KieServerExtension {
private static final Logger logger = LoggerFactory.getLogger(DroolsKieServerExtension.class);
public static final String EXTENSION_NAME = "Drools";
private static final Boolean disabled = Boolean.parseBoolean(System.getProperty(KieServerConstants.KIE_DROOLS_SERVER_EXT_DISABLED, "false"));
private static final Boolean filterRemoteable = Boolean.parseBoolean(System.getProperty(KieServerConstants.KIE_DROOLS_FILTER_REMOTEABLE_CLASSES, "false"));
private RulesExecutionService rulesExecutionService;
private KieContainerCommandService batchCommandService;
private KieServerRegistry registry;
private List<Object> services = new ArrayList<Object>();
private boolean initialized = false;
@Override
public boolean isInitialized() {
return initialized;
}
@Override
public boolean isActive() {
return disabled == false;
}
@Override
public void init(KieServerImpl kieServer, KieServerRegistry registry) {
this.rulesExecutionService = new RulesExecutionService(registry);
this.batchCommandService = new DroolsKieContainerCommandServiceImpl(kieServer, registry, this.rulesExecutionService);
this.registry = registry;
if (registry.getKieSessionLookupManager() != null) {
registry.getKieSessionLookupManager().addHandler(new DroolsKieSessionLookupHandler());
}
services.add(batchCommandService);
services.add(rulesExecutionService);
initialized = true;
}
@Override
public void destroy(KieServerImpl kieServer, KieServerRegistry registry) {
// no-op?
}
@Override
public void createContainer(String id, KieContainerInstance kieContainerInstance, Map<String, Object> parameters) {
// do any other bootstrapping rule service requires
Set<Class<?>> extraClasses = new HashSet<Class<?>>();
// create kbases so declared types can be created
Collection<String> kbases = kieContainerInstance.getKieContainer().getKieBaseNames();
for (String kbase : kbases) {
kieContainerInstance.getKieContainer().getKieBase(kbase);
}
KieModuleMetaData metaData = (KieModuleMetaData) parameters.get(KieServerConstants.KIE_SERVER_PARAM_MODULE_METADATA);
Collection<String> packages = metaData.getPackages();
for (String p : packages) {
Collection<String> classes = metaData.getClasses(p);
for (String c : classes) {
String type = p + "." + c;
try {
logger.debug("Adding {} type into extra jaxb classes set", type);
Class<?> clazz = kieContainerInstance.getKieContainer().getClassLoader().loadClass(type);
addExtraClass(extraClasses, clazz, filterRemoteable);
logger.debug("Added {} type into extra jaxb classes set", type);
} catch (ClassNotFoundException e) {
logger.warn("Unable to create instance of type {} due to {}", type, e.getMessage());
logger.debug("Complete stack trace for exception while creating type {}", type, e);
} catch (Throwable e) {
logger.warn("Unexpected error while create instance of type {} due to {}", type, e.getMessage());
logger.debug("Complete stack trace for unknown error while creating type {}", type, e);
}
}
}
kieContainerInstance.addExtraClasses(extraClasses);
}
@Override
public void updateContainer(String id, KieContainerInstance kieContainerInstance, Map<String, Object> parameters) {
disposeContainer(id, kieContainerInstance, parameters);
// just do the same as when creating container to make sure all is up to date
createContainer(id, kieContainerInstance, parameters);
}
@Override
public boolean isUpdateContainerAllowed(String id, KieContainerInstance kieContainerInstance, Map<String, Object> parameters) {
return true;
}
@Override
public void disposeContainer(String id, KieContainerInstance kieContainerInstance, Map<String, Object> parameters) {
}
@Override
public List<Object> getAppComponents(SupportedTransports type) {
ServiceLoader<KieServerApplicationComponentsService> appComponentsServices
= ServiceLoader.load(KieServerApplicationComponentsService.class);
List<Object> appComponentsList = new ArrayList<Object>();
Object [] services = {
batchCommandService,
rulesExecutionService,
registry
};
for( KieServerApplicationComponentsService appComponentsService : appComponentsServices ) {
appComponentsList.addAll(appComponentsService.getAppComponents(EXTENSION_NAME, type, services));
}
return appComponentsList;
}
@Override
public <T> T getAppComponents(Class<T> serviceType) {
if (serviceType.isAssignableFrom(batchCommandService.getClass())) {
return (T) batchCommandService;
}
return null;
}
@Override
public String getImplementedCapability() {
return KieServerConstants.CAPABILITY_BRM;
}
@Override
public List<Object> getServices() {
return services;
}
@Override
public String getExtensionName() {
return EXTENSION_NAME;
}
@Override
public Integer getStartOrder() {
return 0;
}
@Override
public String toString() {
return EXTENSION_NAME + " KIE Server extension";
}
protected void addExtraClass( Set<Class<?>> extraClasses, Class classToAdd, boolean filtered) {
if( classToAdd.isInterface()
|| classToAdd.isAnnotation()
|| classToAdd.isLocalClass()
|| classToAdd.isMemberClass() ) {
return;
}
if (filtered) {
boolean jaxbClass = false;
boolean remoteableClass = false;
// @XmlRootElement and @XmlType may be used with inheritance
for (Annotation anno : classToAdd.getAnnotations()) {
if (XmlRootElement.class.equals(anno.annotationType())) {
jaxbClass = true;
break;
}
if (XmlType.class.equals(anno.annotationType())) {
jaxbClass = true;
break;
}
}
// @Remotable is not inheritable, and may not be used as such
for (Annotation anno : classToAdd.getDeclaredAnnotations()) {
if (Remotable.class.equals(anno.annotationType())) {
remoteableClass = true;
break;
}
}
if (jaxbClass || remoteableClass) {
extraClasses.add(classToAdd);
}
} else {
extraClasses.add(classToAdd);
}
}
}