Attachment 573789 Details for Bug 724294 – Class demonstrating the problem

Class demonstrating the problem

CEP2.java (text/x-java), 3.04 KB, created by manstis on 2012-03-29 20:24:21 UTC

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Creator: manstis

Created: 2012-03-29 20:24:21 UTC

Size: 3.04 KB

patch

obsolete

>/*
> * Copyright 2012 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.jboss.qa.guvnor.agent;
>
>import java.io.IOException;
>import java.io.InputStream;
>import java.util.HashSet;
>import java.util.Set;
>
>import org.drools.KnowledgeBase;
>import org.drools.KnowledgeBaseConfiguration;
>import org.drools.KnowledgeBaseFactory;
>import org.drools.conf.EventProcessingOption;
>import org.drools.core.util.DroolsStreamUtils;
>import org.drools.definition.KnowledgePackage;
>import org.drools.definitions.impl.KnowledgePackageImp;
>import org.drools.rule.Package;
>
>/**
> * https://bugzilla.redhat.com/show_bug.cgi?id=724294
> */
>public class CEP2 {
>
>    public static void main(String[] args) throws IOException,
>                                          ClassNotFoundException {
>        new CEP2().testSetupOfOperatorCache();
>    }
>
>    public void testSetupOfOperatorCache() throws IOException,
>                                          ClassNotFoundException {
>
>        //Uncomment the following line and the test will pass. 
>        
>        //This is because calling this code implicitly causes EvaluatorRegistry to be invoked 
>        //and the static initializer block in all (registered) org.drools.base.evaluators classes 
>        //to be called. These populate the CACHE in org.drools.base.evaluators.Operator. This CACHE 
>        //is used by Operator.readResolve lookup an Operator object from it's String identifier.
>        //readResolve is invoked during deserialization and, if a deserialized Operator is not in
>        //the cache Null is returned leading to the reported bug. 
>        
>        // final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
>
>        //Deserialise a binary package.
>        //This code is based loosely on that in KnowledgeAgentImpl.addResourcesToKnowledgeBase
>        InputStream is = this.getClass().getClassLoader().getResourceAsStream( "withcep.pkg" );
>        Package pkg = (Package) DroolsStreamUtils.streamIn( is);
>
>        Set<KnowledgePackage> kpackages = new HashSet<KnowledgePackage>();
>        KnowledgePackage kpackage = new KnowledgePackageImp( pkg );
>        kpackages.add(kpackage);
>        
>        //If KnowledgeBaseConfiguration is empty or does not contain EventProcessingOption.STREAM option the test passes.
>        KnowledgeBaseConfiguration kbconfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
>        kbconfig.setOption(EventProcessingOption.STREAM);
>        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbconfig);
>        kbase.addKnowledgePackages(kpackages);
>
>    }
>
>}

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Attachments on bug 724294: 514330 | 514331 | 573789 | 573790