How to configure Drools in Activiti-Explorer 5.20 ?

[kishorechalla]

Hi All,
I going crazy on this, how to configure into activiti-explorer? I have done the following:
placed Drools-Core, Drools-Compiler, Knowledge-Api (all are 5.5.0-final version) and mvel-2.1-Drools16 jars into C:\Program Files\apache-tomcat-7.0.69\webapps\activiti-explorer\WEB-INF\lib

now all the posts and activiti in action book says that we need to add the following code snippet in applicationContext.xml present in WEB-INF folder.

<beans>
          <bean id="processEngineConfiguration"
class="org.activiti.engine.impl.cfg.
➥ StandaloneInMemProcessEngineConfiguration">
            <property name="databaseSchemaUpdate" value="true" />
            <property name="customPostDeployers">
             <list>
              <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
             </list>
            </property>
          </bean>
        </beans>

but there no applicationContext.xml file for 5.20 version.

So I have added below piece to processEngineConfiguration bean present in activiti-custom-context.xml
<property name="customPostDeployers">
             <list>
              <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
             </list>
            </property>

Now when I try to upload .bar file through activiti-explorer (browser) I am getting below error.
SEVERE: Servlet.service() for servlet [Vaadin Application Servlet] in context with path [/activiti-explorer] threw exception [java.lang.NoClassDefFoundError: org/kie/internal/builder/KnowledgeBuilderConfiguration] with root cause
java.lang.ClassNotFoundException: org.kie.internal.builder.KnowledgeBuilderConfiguration
   at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1858)
   at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1701)
   at java.lang.Class.forName0(Native Method)
   at java.lang.Class.forName(Class.java:264)
   at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:198)
   at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceRegistryImpl.java:193)
   at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:150)
   at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeBuilderFactory.java:130)
   at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderServiceFactory(KnowledgeBuilderFactory.java:124)
   at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
   at org.activiti.engine.impl.rules.RulesDeployer.deploy(RulesDeployer.java:54)
   at org.activiti.engine.impl.persistence.deploy.DeploymentManager.deploy(DeploymentManager.java:58)
   at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:106)
   at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:37)
   at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
   at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
   at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
   at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
   at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
   at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
   at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
   at org.activiti.engine.impl.RepositoryServiceImpl.deploy(RepositoryServiceImpl.java:79)
   at org.activiti.engine.impl.repository.DeploymentBuilderImpl.deploy(DeploymentBuilderImpl.java:156)
   at org.activiti.explorer.ui.management.deployment.DeploymentUploadReceiver.deployUploadedFile(DeploymentUploadReceiver.java:96)
   at org.activiti.explorer.ui.management.deployment.DeploymentUploadReceiver.uploadFinished(DeploymentUploadReceiver.java:71)
   at org.activiti.explorer.ui.custom.UploadComponent.uploadFinished(UploadComponent.java:197)
   at org.activiti.explorer.ui.custom.UploadComponent$1.streamingFinished(UploadComponent.java:222)
   at com.vaadin.ui.DragAndDropWrapper$ProxyReceiver.streamingFinished(DragAndDropWrapper.java:332)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.streamToReceiver(AbstractCommunicationManager.java:600)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleXhrFilePost(AbstractCommunicationManager.java:520)
   at com.vaadin.terminal.gwt.server.CommunicationManager.handleFileUpload(CommunicationManager.java:267)
   at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:495)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:53)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
   at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
   at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
   at java.lang.Thread.run(Thread.java:745)

this is very strange as it is looking for jboss kie jar.

And if I don't add customPostDeployers property to activiti-custom-context.xml, I get "deployment XXXX does not contain any rules." which is obvious as I did not configure drools.

below is my bar file..
https://drive.google.com/open?id=0B7g4ykqRYTxtUTlLT0dYV0pCTUk

Can any one please help on this. Any help is greatly appreciated. Thanks in advance.

[kishorechalla]

below is what i saw in many other posts:

<beans>
          <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration">
            <property name="databaseSchemaUpdate" value="true" />
            <property name="customPostDeployers">
             <list>
              <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
             </list>
            </property>
          </bean>
        </beans>

below piece I have added to activiti-custom-context.xml:

<property name="customPostDeployers">
             <list>
              <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
             </list>
            </property>

[jbarrez]

Yes, uncommenting everything that is in activiti-custom-context.xml that is within WEB-INF and adding the postdeployer does the trick.
Also remember you need to add the drools libraries to your webapp, they are not there by default!

[kishorechalla]

Hi jbarrez,

Thank you for the reply. I did exactly the same thing.
1. Uncommented everything in activiti-custom-context.xml present in WEB-INF/classes
2. Added below property to processEngineConfiguration bean
<property name="customPostDeployers">
  <list>
   <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
  </list>
</property>
3. Added below jar file into apache-tomcat-7.0.69\webapps\activiti-explorer\WEB-INF\lib
drools-compiler-6.4.0.Final
drools-core-6.4.0.Final
mvel2-2.1.0.drools16
knowledge-api-6.4.0.Final
Now I uploaded the .bar file which has both bpmn and drl file.
below is the code of both:

<businessRuleTask id="businessruletask1" name="Business rule task" activiti:ruleVariablesInput="${DiagCode}" activiti:rules="match-diagCodes" activiti:resultVariable="isDiagMatch" activiti:exclude="true"></businessRuleTask>

.drl file
——

rule "match-diagCodes"
    when
  (DiagCode == "486")
then
  isDiagMatch = true;
  System.out.println ("############### match is true");
end


now I started tomcat and opened activiti-explorer through browser. Now I tried to upload .bar file, it is not uploading and I see following error in tomcat logs(localhost file)

SEVERE: Servlet.service() for servlet [Vaadin Application Servlet] in context with path [/activiti-explorer] threw exception [java.lang.NoClassDefFoundError: org/kie/internal/builder/KnowledgeBuilderConfiguration] with root cause
java.lang.ClassNotFoundException: org.kie.internal.builder.KnowledgeBuilderConfiguration
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1858)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1701)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:198)
at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceRegistryImpl.java:193)
at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:150)
at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeBuilderFactory.java:130)
at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderServiceFactory(KnowledgeBuilderFactory.java:124)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
at org.activiti.engine.impl.rules.RulesDeployer.deploy(RulesDeployer.java:54)
at org.activiti.engine.impl.persistence.deploy.DeploymentManager.deploy(DeploymentManager.java:58)
at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:106)
at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:37)
at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:37)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
at org.activiti.engine.impl.RepositoryServiceImpl.deploy(RepositoryServiceImpl.java:79)
at org.activiti.engine.impl.repository.DeploymentBuilderImpl.deploy(DeploymentBuilderImpl.java:156)
at org.activiti.explorer.ui.management.deployment.DeploymentUploadReceiver.deployUploadedFile(DeploymentUploadReceiver.java:96)
at org.activiti.explorer.ui.management.deployment.DeploymentUploadReceiver.uploadFinished(DeploymentUploadReceiver.java:71)
at org.activiti.explorer.ui.custom.UploadComponent.uploadFinished(UploadComponent.java:197)
at org.activiti.explorer.ui.custom.UploadComponent$1.streamingFinished(UploadComponent.java:222)
at com.vaadin.ui.DragAndDropWrapper$ProxyReceiver.streamingFinished(DragAndDropWrapper.java:332)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.streamToReceiver(AbstractCommunicationManager.java:600)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleXhrFilePost(AbstractCommunicationManager.java:520)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleFileUpload(CommunicationManager.java:267)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:495)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

Please help with this whats my issue and if I am doing everything right.

Thank you.

[kishorechalla]

Can someone please reply if you know the answer ….

[jbarrez]

Drools 6.x won't work, Drools 5.5 does work I believe.
Api's changed greatly between 5 and 6, and we need to update our business rule task.

[kishorechalla]

missed activiti-custom-context.xml
——————————

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
  xmlns:jee="http://www.springframework.org/schema/jee" xmlns:aop="http://www.springframework.org/schema/aop"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
      
  <bean id="dbProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location" value="classpath:db.properties" />
    <property name="ignoreUnresolvablePlaceholders" value="true" />
  </bean>
   
  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="${jdbc.driver}" />
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
    <property name="defaultAutoCommit" value="false" />
  </bean>

  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
   <property name="dataSource" ref="dataSource" />
  </bean>
 
  <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
   <property name="dataSource" ref="dataSource" />
   <property name="transactionManager" ref="transactionManager" />
   <property name="databaseSchemaUpdate" value="true" />
   <property name="jobExecutorActivate" value="true" />
    <property name="enableDatabaseEventLogging" value="true" />
    <property name="customFormTypes">
      <list>
        <bean class="org.activiti.explorer.form.UserFormType"/>
        <bean class="org.activiti.explorer.form.ProcessDefinitionFormType"/>
        <bean class="org.activiti.explorer.form.MonthFormType"/>  
      </list>
    </property>
<property name="customPostDeployers">
  <list>
   <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
  </list>
</property>
  </bean>
 
  <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean" destroy-method="destroy">
   <property name="processEngineConfiguration" ref="processEngineConfiguration" />
  </bean>
 
  <bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService" />
  <bean id="runtimeService" factory-bean="processEngine" factory-method="getRuntimeService" />
  <bean id="taskService" factory-bean="processEngine" factory-method="getTaskService" />
  <bean id="formService" factory-bean="processEngine" factory-method="getFormService" />
  <bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService" />
  <bean id="managementService" factory-bean="processEngine" factory-method="getManagementService" />
  <bean id="identityService" factory-bean="processEngine" factory-method="getIdentityService" />
 
</beans>

[kishorechalla]

Hi jbarrez,

Sorry for the late response from my end. This time I have done the same thing as above by placing following jars.
drools-compiler-5.5.0.Final
drools-core-5.5.0.Final
mvel2-2.1.0.drools16
knowledge-api-5.5.0.Final

the server started fine but when I upload the bar I am getting the following exception:

com.vaadin.terminal.gwt.server.UploadException: Upload failed
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.streamToReceiver(AbstractCommunicationManager.java:623)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleXhrFilePost(AbstractCommunicationManager.java:520)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleFileUpload(CommunicationManager.java:267)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:495)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Could not parse knowledge.
at org.drools.builder.impl.KnowledgeBuilderImpl.newKnowledgeBase(KnowledgeBuilderImpl.java:79)
at org.activiti.engine.impl.rules.RulesDeployer.deploy(RulesDeployer.java:64)
at org.activiti.engine.impl.persistence.deploy.DeploymentManager.deploy(DeploymentManager.java:58)
at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:106)
at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:37)
at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:37)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
at org.activiti.engine.impl.RepositoryServiceImpl.deploy(RepositoryServiceImpl.java:79)
at org.activiti.engine.impl.repository.DeploymentBuilderImpl.deploy(DeploymentBuilderImpl.java:156)
at org.activiti.explorer.ui.management.deployment.DeploymentUploadReceiver.deployUploadedFile(DeploymentUploadReceiver.java:96)
at org.activiti.explorer.ui.management.deployment.DeploymentUploadReceiver.uploadFinished(DeploymentUploadReceiver.java:71)
at org.activiti.explorer.ui.custom.UploadComponent.uploadFinished(UploadComponent.java:197)
at org.activiti.explorer.ui.custom.UploadComponent$1.streamingFinished(UploadComponent.java:222)
at com.vaadin.ui.DragAndDropWrapper$ProxyReceiver.streamingFinished(DragAndDropWrapper.java:332)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.streamToReceiver(AbstractCommunicationManager.java:600)
… 28 more

I have read all most everything about activiti business rule task find in internet and the book. I could not find any solution for version 5.20. Below is my code snippet in different files needed for business rule. Could you please check if I am wrong anywhere and are those libraries versions fine ?

business rule code:
—————-
<businessRuleTask id="businessruletask1" name="Business rule task" activiti:ruleVariablesInput="${DiagCode}" activiti:rules="match-diagCodes" activiti:resultVariable="isDiagMatch" activiti:exclude="true"></businessRuleTask>

.drl file
——
rule "match-diagCodes"
when
(DiagCode == "486")
then
isDiagMatch = true;
System.out.println ("############### match is true");
end

activiti-custom-context.xml
————————
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
  xmlns:jee="http://www.springframework.org/schema/jee" xmlns:aop="http://www.springframework.org/schema/aop"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
      
  <bean id="dbProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location" value="classpath:db.properties" />
    <property name="ignoreUnresolvablePlaceholders" value="true" />
  </bean>
   
  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="${jdbc.driver}" />
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
    <property name="defaultAutoCommit" value="false" />
  </bean>

  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
   <property name="dataSource" ref="dataSource" />
  </bean>
 
  <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
   <property name="dataSource" ref="dataSource" />
   <property name="transactionManager" ref="transactionManager" />
   <property name="databaseSchemaUpdate" value="true" />
   <property name="jobExecutorActivate" value="true" />
    <property name="enableDatabaseEventLogging" value="true" />
    <property name="customFormTypes">
      <list>
        <bean class="org.activiti.explorer.form.UserFormType"/>
        <bean class="org.activiti.explorer.form.ProcessDefinitionFormType"/>
        <bean class="org.activiti.explorer.form.MonthFormType"/>  
      </list>
    </property>
<property name="customPostDeployers">
  <list>
   <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
  </list>
</property>
  </bean>
 
  <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean" destroy-method="destroy">
   <property name="processEngineConfiguration" ref="processEngineConfiguration" />
  </bean>
 
  <bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService" />
  <bean id="runtimeService" factory-bean="processEngine" factory-method="getRuntimeService" />
  <bean id="taskService" factory-bean="processEngine" factory-method="getTaskService" />
  <bean id="formService" factory-bean="processEngine" factory-method="getFormService" />
  <bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService" />
  <bean id="managementService" factory-bean="processEngine" factory-method="getManagementService" />
  <bean id="identityService" factory-bean="processEngine" factory-method="getIdentityService" />
 
</beans>