calling getter inside method Returns java.lang.NullPointerException with Activiti Engine

[gdharley]

Nope, these are simple spring beans and need to be declared in the spring context.

[ilyass_act]

For example @Service("bookOrder") won't work ? 

[gdharley]

If you're using spring annotation based configuration then this is what you would do.

If you are using xml based configuration (which is what it appears you are doing) then you would use the activiti.cfg.xml

[ilyass_act]

Thank you Geg ,
Let's say you have a ServiceTask where you pass expression , activiti:expression="${operationController.sayHello()}" .
and your method implements something like this :
public void sayHello(){

System.out.println("the isbn :"+bookOrder.getIsbn()); 

}

the value of ISBN comes from a JSF Form , How would you implement this ?