topic Re: @Autowired private RuntimeService runtimeService; is giving null in Alfresco Archive

@Autowired private RuntimeService runtimeService; is giving null

logicallimit — Fri, 29 Apr 2016 17:46:23 GMT

I am trying to build a spring web mvc application using Activiti 5.19.0.2.When I try to call Activiti API from a java class where I use @Autowired to get instance of activity engine, I am getting null. Am I missing something in my following code.mvc-dispatcher-servlet.xml<!– Activiti related bea

Re: @Autowired private RuntimeService runtimeService; is giving null

logicallimit — Fri, 29 Apr 2016 17:53:50 GMT

There is a typo in the last line code
<code>
runtimeService.setVariable(processInstance.getId(), "emitraEntity", emitraEntity);
</code>

It is actually
<code>
runtimeService.setVariable(processInstance.getId(), "emEntity", emEntity);
</code>

Problem still prevails.

Re: @Autowired private RuntimeService runtimeService; is giving null

martin_grofcik — Mon, 02 May 2016 04:46:32 GMT

Hi,

Can you create jUnit test?
https://forums.activiti.org/content/sticky-how-write-unit-test

Regards
Martin

Re: @Autowired private RuntimeService runtimeService; is giving null

logicallimit — Mon, 02 May 2016 06:49:42 GMT

Thanks for the reply Martin. I was able to solve the problem.

Let me brief about it. There is a service class from where I call the class where Activiti related logic is put up.
<code>
@Service
@Transactional
public class EmServiceImpl implements EmService {

public EmServiceImpl() {
System.out.println("EmServiceImpl");
}

@Autowired
private EmDAO emDAO;

@Autowired
private ActivitiRuntimeService activitiRuntimeService;

public long createEm(EmEntity emEntity) {
long applicationNo = emDAO.insertEm(emEntity);

activitiRuntimeService.startProcess(emEntity);

return applicationNo;
}
}
</code>
<code>
@Service
@Transactional
public class ActivitiRuntimeService {

public ActivitiRuntimeService() {
// TODO Auto-generated constructor stub
}

@Autowired
private RuntimeService runtimeService;

@Autowired
private RepositoryService repositoryService;

@Transactional
public void startProcess(EmEntity emEntity){
Map<String, Object> variables = new HashMap<String, Object>();
variables.put("emEntity", emEntity);

repositoryService.createDeployment().name("Em Test").addInputStream("em-test.bpmn20.xml", ReflectUtil.getResourceAsStream("diagrams/em-test.bpmn")).deploy();

@SuppressWarnings("unused")
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("em-test", variables);

}
}
</code>

The above code is corrected code. The problem was that in the service class "EmServiceImpl", I was also creating an object of my custom Activiti related class "ActivitiRuntimeService" through code by calling default constructor. And hence it was probably confusing Spring container and the object was ultimately not even initialized and was null. It was a very kiddish mistake indeed!

So, when we are autowiring to get automatic object, then need to check we are not creating explicit object also in the calling code.