Using @Component Annotation for JavaDelegate Implementations

Camunda 7 Topics Discussion & Questions
1

I have a Spring Bean which I want to AutoWire in a JavaDelegate Implementation.
If I just add the bean with @Autowired annotation then it throws NullPointerException.

Adding @Component Annotation on the JavaDelegate Implementation class works fine.
Is that ok to use @Component Annotation for JavaDelegate Implementations?

I have read somewhere that the instantiation of these JavaDelegate Implementations happens at the time of Task execution and if 2 tasks are attached to the same JavaDelegate then both will get different instances of the class. Is creating a bean @Component Annotation will be a problem here?

2

This is perfectly ok. You just have to use “delegate expression” (not “java class”) as the implementation of the service task.

3

What will be the value in the case of “delegate expression”?

Will it still be similar to Java Class?

4

It will be the name of the spring bean. E.g. ${myDelegateBean}.

2 Likes
5