Variable Scope Help Needed

Question

Can someone help me understand or can someone point me to the documentation that describes variables?
I am thinking that variables defined in the BPELProcess are like global variables, variables defined in a scope are local variables to the scope, is this accurate?
I am trying to access the receive activity input variable in my catch block but it appears to be empty, when a fault occurs do the "global" variables go out out of scope?

Answer 1

Hi ,
As soon as you create a BPEL process , you have a parent scope already .If you create variables for that scope then the variables are global and can be used any where in the complete process .
Now , if you drag and drop some scope in it and if you creaete variables for that scope then it would become local to that scope ie.. it can be used only in that scope ie like local variables in called function in java.
When you have an exception and when you try to catch the exception in the Catch block , you need to throw the catch variable and if you are using catch all block ,then there is no need for throwing but in both the cases you need to set the fault variable.Fault variable with the corresponding message has to be created earlier before assigning any values to it .
Ideally Fault variables are kept global because some times you may require to propogate your fault to your parent scope ,it depends on your need .