/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.servicemix.examples.camel;
import org.drools.*;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderErrors;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.KnowledgeBuilderFactoryService;
import org.drools.compiler.PackageBuilderConfiguration;
import org.drools.grid.Grid;
import org.drools.grid.GridNode;
import org.drools.grid.impl.GridImpl;
import org.drools.grid.impl.GridNodeImpl;
import org.drools.io.ResourceFactory;
import org.drools.io.Resource;
import org.drools.builder.ResourceType;
import org.drools.runtime.CommandExecutor;
import java.util.HashMap;
public class DroolsBlueprintBean {
public static GridNode createGridNode(String id){
Grid grid = new GridImpl( new HashMap<String, Object>() );
return grid.createGridNode( id );
}
public static KnowledgeBase createKnowledgeBase(GridNode node,String resource,String resourcetype){
if ( node == null ) {
node = new GridNodeImpl();
}
//kbase configuration
PackageBuilderConfiguration kconf = (PackageBuilderConfiguration) KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null,DroolsBlueprintBean.class.getClassLoader());
//kbuilder
KnowledgeBuilder kbuilder = node.get( KnowledgeBuilderFactoryService.class ).newKnowledgeBuilder( kconf);
kbuilder.add(parseResource(resource),ResourceType.getResourceType(resourcetype));
// error handling
KnowledgeBuilderErrors errors = kbuilder.getErrors();
if ( !errors.isEmpty() ) {
throw new RuntimeException( errors.toString() );
}
//KnowledgeBase
KnowledgeBaseConfiguration kbaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null, DroolsBlueprintBean.class.getClassLoader());
KnowledgeBase kbase = node.get( KnowledgeBaseFactoryService.class ).newKnowledgeBase(kbaseConfig);
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
return kbase;
}
public static CommandExecutor createKnowledgeSession(KnowledgeBase kbase,GridNode node,String type,String name){
CommandExecutor ksession;
if (type.equals("stateful")) {
//Adding a configuration forces drools to use the current classloader (see issue SM-2316)
ksession = kbase.newStatefulKnowledgeSession(new SessionConfiguration(), null);
}else {
//Adding a configuration forces drools to use the current classloader (see issue SM-2316)
ksession = kbase.newStatelessKnowledgeSession(new SessionConfiguration());
}
node.set(name,ksession);
return ksession;
}
private static Resource parseResource(String resource) {
if ( resource.trim().startsWith( "classpath:" ) ) {
return ResourceFactory.newClassPathResource(resource.substring( resource.indexOf( ':' ) + 1 ),DroolsBlueprintBean.class);
} else {
return ResourceFactory.newUrlResource( resource );
}
}
}