Question
Rule Resolution Approach
Hello Guys,
When I am going through SSA course I came across a question in Rule Resolution but with two different answers for it. Please let me know why.
Question 1:
Consider the following scenario:
The PIPFW application has the following application RuleSets:
- PIPFW:01-01
- PIPFWInt:01-01
- LES:01-01
- LESCatalog:01-01
- LESInt:01-01
A rule with an applies-to class of “ABC-FW-LoanReq-Work-Autoloan” calls “Rule123”. There are 9 copies of Rule123 in the system as shown below.
- Option A: ABC-FW-LoanReq-Work, PIPFW:01-01-05, Availability = Withdrawn
- Option B: ABC-FW-LoanReq-Work, PIPFW:01-01-03, Availability = Yes
- Option C: ABC-FW-LoanReq-Work, LESCatalog:01-01-05, Availability = No/Draft
- Option D: ABC-FW-LoanReq-Work, LESCatalog:01-01-03, Availability = Blocked
- Option E: ABC-FW-LoanReq-, PIPFW:01-01-05, Availability = Withdrawn
- Option F: ABC-FW-LoanReq-, PIPFW:01-01-03, Availability = Final
- Option G: ABC-FW-LoanReq-, LESCatalog:01-01-05, Availability = Yes
- Option H: ABC-FW-LoanReq-, LESCatalog:01-01-03, Availability = Yes
- Option I: @baseclass, Pega-RULES:07-10-99, Availability = Yes
Which rule is chosen by Rule Resolution? (Choose One)
C, error raised
D, error raised
A, error raised
F, no error raised
I, no erorr raised
D, no error raised
C, no error raised
H, error raised
B, error raised
A, no error raised
F, error raised
H, no error raised
E, no error raised
B, no error raised
G, no error raised
G, error raised
E, error raised
Question 2:
Consider the following scenario:
The PIPFW application has the following application RuleSets:
- PIPFW:01-01
- PIPFWInt:01-01
- LES:01-01
- LESCatalog:01-01-01
- LESInt:01-01
A rule with an applies-to class of “ABC-FW-LoanReq-Work-Autoloan” calls “Rule123”. There are 9 copies of Rule123 in the system as shown below.
- Option A: ABC-FW-LoanReq-Work, PIPFW:01-01-05, Availability = Withdrawn
- Option B: ABC-FW-LoanReq-Work, PIPFW:01-01-03, Availability = Yes
- Option C: ABC-FW-LoanReq-Work, LESCatalog:01-01-05, Availability = No/Draft
- Option D: ABC-FW-LoanReq-Work, LESCatalog:01-01-03, Availability = Blocked
- Option E: ABC-FW-LoanReq-, PIPFW:01-01-05, Availability = Withdrawn
- Option F: ABC-FW-LoanReq-, PIPFW:01-01-03, Availability = Final
- Option G: ABC-FW-LoanReq-, LESCatalog:01-01-05, Availability = Yes
- Option H: ABC-FW-LoanReq-, LESCatalog:01-01-03, Availability = Yes
- Option I: @baseclass, Pega-RULES: 07-10-99, Availability = Yes
Which rule is chosen by Rule Resolution? (Choose One)
A, error raised
E, error raised
B, no error raised
G, error raised
D, no error raised
B, error raised
H, no error raised
I, error raised
F, no error raised
I, no error raised
A, no error raised
C, error raised
H, error raised
C, no error raised
D, error raised
F, error raised
G, no error raised
My question is even though the question is same why there are two different answers? Did I miss something while understanding?? Please educate me.
Thanks in advance
Hi Pankaj,
I think your explanation is appropriate but I am surprised why the rule resolution considers only LESCatalog: all the time? Is it just because it searches in Cache first??
Could you please clarify me on this.
Thanks in advance
Prasan
Rule resolution always follows the order from Application stack. So in case of Question 1
- PIPFW:01-01
- PIPFWInt:01-01
- LES:01-01
- LESCatalog:01-01
- LESInt:01-01
First rules in PIPFW are considered (from higher version first), since there is a rule in PIPFW:01-01-05, it will be picked. Since this rule is withdrawn, all the rules in this ruleset are skipped by Rule resolution so Option A and B are skipped.
Then rules in PIPFWInt are considered : there are no rules.
Next LES: Again no rules
Next LESCatalog: Again higher version first : There is a rule in LESCatalog: 01-01-05, but is marked as No/Draft so in this case Only this version is skipped (this is difference between Withdrawn and No/Draft)
Then next version has a rule again which is marked as Blocked. This rule will be picked as Rule resolution considers blocked rules and throws exceptions, hence option D.
Hope this clarifies
Awesome, I got the background process now.
Thanks a lot Pankaj, I truly appreciate your help.
Very Clear explanation, Thank you...
Major difference in both the questions is the ruleset restriction for LESCatalog.
In question 1 : This ruleset is defined in ruleset stack as LESCatalog:01-01 so all the rules in LESCatalog:01-01-01 to LESCatalog:01-01-99 will be considered, hence D option since blocked rule is picked in LESCatalog:01-01-03.
In question 2 : This rule stack is restricted till patch version LESCatalog:01-01-01 and hence Option C,D,G and H are out of scope since they are in higher ruleset version (03 and 05) and finally it will go to baseclass rule and find it.
Let me know if this clarifies