Using Decision Service for existing rules based on Java Fact

Question

Hello
According The BPEL Process Manager developers guid (10.1.3.1) page 18-28 if we want to call existing ruleset from BPEL that it's based on java facts . We should write RL function and convert xml data into java and assert the facts and after retrieving the result we should set the data from java types into xml types. From BPEL we should call this function
But I have question : We know that rules based on java facts has better performance than xml facts , Instead of Using Decicion Service , we have writen java function and run ruleset and then we have exposed this as a webservice and invoke it from BPEL.
What is the performance difference if we use this way instead of Decision Services?

Answer 1

Thank you ralf
So I want to write an RL Function and call my ruleset (based on my Java facts) from this RL Function and then Call this RL Function from BPEL decicion services.
I have problem : I want to generate XSD that match with my JavaFact A . How can I easily create XSD from my java fact class.? I saw http://technology.amis.nl/blog/?p=3221 that shows how we can create xsd from Java classes . I could generate XSD from Java class A by the recommended method.
I have Class A that contains member B as an array of objects (C) , My problem is that When I import generated xsd into rule Author it's generated JAXB class does not generate member B as an array of class(C)
Is there any way that I can modify class A into JAXB compatible class and generate xsd file from it's JAXB class .
I don't know JAXB specification and I do not know how JAXB works.I want easily generate JAXB class form my java class A and then retrieve corresponding xsd from it .
Can I do such thing?