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issue with bean acces in service task

mdaviot

Hello,

I have been stuck all day with this issue… your help would be really welcome.

I have a simple process DemoErrorManagement with a service task implemented as an expression which refers to a bean : myService, speficied with the interface Service1.

In my unit test I inject the bean myService which is mocked by Mockito, it runs seamlessly.

From a main class (StartProcess) I use a slightly different activiti.cfg.xml file to inject the real bean : DemoService. But it is not found by Activiti : org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'myService'
I checked by changing the activiti.cfg.xml file that it is really used.

I attach the full project (it is very small, only to reproduce the issue) : http://dl.dropbox.com/u/21035474/DemoErrorMgt.zip (no way to upload it here as attachment to the post ?)

Is it a bug in Activiti or what am I doing wrong ?

Thanks a lot
Michel

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frederikherema1

I see you're using the SpringProcessEngineCOnfiguration. So the full spring-context is available to use in your expressions. So "myService" should just work.

Can you try adding the bean to the "beans" property in activiti configuration;

<br><property name="myService"><br>&nbsp;&nbsp;&nbsp; <map><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <entry key="myService" value-ref="myService" /><br>&nbsp;&nbsp;&nbsp; </map><br>&nbsp; </property><br>

mdaviot

Hi and thanks for looking into this.

I'm really not a spring expert … I tried to add this property under beans element

org.xml.sax.SAXParseException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'property'. One of '{"<a href="http://www.springframework.org/schema/beans%22:import" rel="nofollow noopener noreferrer">http://www.springframework.org/schema/beans':import</a>, "<a href="http://www.springframework.org/schema/beans%22:alias" rel="nofollow noopener noreferrer">http://www.springframework.org/schema/beans':alias</a>, "<a href="http://www.springframework.org/schema/beans%22:bean" rel="nofollow noopener noreferrer">http://www.springframework.org/schema/beans':bean</a>, WC[##other:"<a href="http://www.springframework.org/schema/beans" rel="nofollow noopener noreferrer">http://www.springframework.org/schema/beans</a>"], "<a href="http://www.springframework.org/schema/beans%22:beans" rel="nofollow noopener noreferrer">http://www.springframework.org/schema/beans':beans</a>}' is expected.<br>

and under bean id="processEngineConfiguration" –>

org.springframework.beans.NotWritablePropertyException: Invalid property 'myService' of bean class [org.activiti.spring.SpringProcessEngineConfiguration]:

Where should I define this property ? And should it be defined for any bean I want to use from service tasks ?

Regards,
Michel

frederikherema1

whoops.. should have been "beans" under "processEngineConfiguration":

<br><property name="beans"><br>&nbsp;&nbsp;&nbsp; <map><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <entry key="myService" value-ref="myService" /><br>&nbsp;&nbsp;&nbsp; </map><br>&nbsp; </property><br>

mdaviot

OK, this time the spring configuration is recognized, but it does not solve my issue at all.

<br><bean id="myService" class="net.atos.cetelem.service.impl.DemoService" /><br><br><bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration"><br>&nbsp; <property name="history" value="full" /><br>&nbsp; <property name="dataSource" ref="activitiDataSource" /><br>&nbsp; <property name="transactionManager" ref="activitiTransactionManager" /><br>&nbsp; <property name="databaseSchemaUpdate" value="true" /><br>&nbsp; <property name="jobExecutorActivate" value="false" /><br>&nbsp; <br>&nbsp; <property name="beans"><br>&nbsp; <map><br>&nbsp;&nbsp; <entry key="myService" value-ref="myService" /><br>&nbsp; </map><br> </property><br> </bean><br>

Would you try to reproduce it on your environment ? You just have to launch net.atos.cetelem.StartProcess, it uses an H2 DB.

org.activiti.engine.ActivitiException: Unknown property used in expression<br> at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:55)<br>&hellip;<br>Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'myService'<br> at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)

frederikherema1

There is no file attached to your comment, please upload it somewhere on the web instead…

mdaviot

Project is available here : http://dl.dropbox.com/u/21035474/DemoErrorMgt.zip (as stated in the first post)

frederikherema1

I see your problem now, it's the way you fetch your process-engine. You're using "ProcessEngines.getDefaultProcessEngine()", this will only read the "processEngines" bean from the activiti.cfg.xml-file.

If you want to use spring, you have to:

Use org.activiti.spring.SpringProcessEngineConfiguration (which you are doing, so that's fine)
Create the ApplicationContext yourself (e.g.. by using Spring's servletContextListener or by creating a XMLClassPathApplicationContext)
Retreive the bean "processEngine" manually and use this INSTEAD of ProcessEngines.getDefaultProcessEngine()

mdaviot

Thanks a lot, you solved the issue for me !!

For the record, here is the working code if anyone is interested :

<br>public class StartProcess {<br><br>&nbsp; private static final ApplicationContext ac= <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; new ClassPathXmlApplicationContext("activiti.cfg.xml");<br> <br> static ProcessEngine processEngine = ac.getBean(ProcessEngine.class);<br><br> public static void main(String[] args) {<br>&nbsp; RepositoryService repositoryService = processEngine.getRepositoryService();<br>&nbsp; repositoryService.createDeployment().addClasspathResource("diagrams/DemoErrorManagement.bpmn20.xml").deploy();<br>&nbsp; processEngine.getRuntimeService().startProcessInstanceByKey("DemoErrorManagement");<br><br> }<br><br>}<br><br>

mdaviot

Note : this step is not required at all.

whoops.. should have been "beans" under "processEngineConfiguration":

 <property name="beans">     <map>       <entry key="myService" value-ref="myService" />     </map>   </property> 

frederikherema1

Indeed, it's only required if you want to limit the visibility of the whole spring-context ion expressions….