I have a question about spring bean injection in service tasks of Flowable, why only this kind of injection with a static modifier worked, and what is the logic of it?
I must inject a spring bean in a Flowable java service task, and I tested some different kind of injection Field, constructor, and setter injection, eventually setter injection with static modifier worked for me like this :
public class GetCurrentUserDlg implements JavaDelegate {
private static PersonService personService;
@Autowired
public void setPersonService(PersonService personService) {
this.personService = personService;
}
@Override
public void execute(DelegateExecution execution) {
personService.getCurrentUser();
}
}
While I can not answer your question, the following works fine for me:
public class SomeDelegate implements JavaDelegate {
@Autowired
private SomeBean bean;
@Override
public void execute(DelegateExecution execution) {
System.out.println(this.bean);
}
}
The class is then used in the process via flowable:class="packages.SomeDelegate"
But, be aware, that you may have problems with autowiring dependencies in the SomeBean bean. This dependencies are not injected when using the flowable:class attribute. In order for this to work you have to make the SomeDelegate a actual bean itself (e.g. via @Service) and use it in your process definition via flowable:delegateExpression="${someDelegate}"
Example:
@Service("someDelegate")
public class SomeDelegate implements JavaDelegate {
...
and
<serviceTask id="doSomething" name="Do Something" flowable:delegateExpression="${someDelegate}"/>