2:04 a.m.
I'm using drools 5.0.1.
I've written the following rules to retrieve objects from the working
memory. Questions:
1) whether there is a better way to organize the rules. For instance the
rule "checkvalidresponse" right now checks for both successful retrieval and
unsuccessful retrieval. Should I split it to 2?
2) When I do drools.update(response) in the "default" rule, it seems to be
in endless loop.
3) The response value set in "retrieve" rule is not updated when rule
"checkvalidresponse" is triggered. Do I need to do drools.update(response)
in the "default" rule?
4) Should I set the response code in the "retrieve" rule and remove the
"checkvalidresponse" rule?
Thanks
rule "default"
dialect "java"
agenda-group "retrieve"
salience 50
when
Request(sfid : ProductIdentifier)
trdata : Data(Identifier == sfid)
response : Response(product == null)
ServiceResponse(responseCode == 0) from
response.getServiceResponse()
then
response.setProduct(trdata.getProduct());
// should I set response code here or let "checkvalidresponse"
handle it?
// do I need to update here?
// drools.update(response);
end
# Shoud I split this to 2? 1) check for successful query and 2) check for
unsuccessful query?
rule "checkvalidresponse"
dialect "java"
agenda-group "retrieve"
salience 20
when
Request()
response : Response()
sres : ServiceResponse(responseCode == 0) from
response.getServiceResponse()
then
String rname = drools.getRule().getName();
System.out.println("Rule: \"" + rname + "\"
triggered");
Product prod = response.getProduct();
// Check if a valid Product found
if ( prod == null ) {
sres.setResponseCode(9);
sres.setResponseMessage("Product not found");
sres.setExceptionCode(9999);
sres.setExceptionMessage("");
} else {
sres.setResponseCode(0);
sres.setResponseMessage("The operation completed
successfully");
sres.setExceptionCode(0);
sres.setExceptionMessage("");
}
response.setServiceResponse(sres);
drools.update(response);
end
# Credentials
# The only valid credential: User Id: User Password: Password
#
rule "checkcred"
dialect "java"
salience 50
when
request : Request()
response : Response()
cred : Credentials(userName != "User" || password !=
"Password")
from request.getCredentials()
sres : ServiceResponse(responseCode == 0) from
response.getServiceResponse()
then
String rname = drools.getRule().getName();
System.out.println("Rule: \"" + rname + "\"
triggered");
sres.setResponseCode(9);
sres.setResponseMessage("Invalid credentials");
sres.setExceptionCode(9000);
sres.setExceptionMessage("");
response.setServiceResponse(sres);
drools.update(response);
end
# Transaction context
# Valid channel: channel01 or channel02
#
rule "checktrctx"
dialect "java"
salience 40
when
request: Request()
response: Response()
ctx : TransactionContext(channel != "channel01" && channel !=
"channel02") from request.getTransactionContext()
sres : ServiceResponse(responseCode == 0) from
response.getServiceResponse()
then
String rname = drools.getRule().getName();
System.out.println("Rule: \"" + rname + "\"
triggered");
System.out.println("Invalid transaction context: " +
ctx.getChannel());
sres.setResponseCode(9);
sres.setResponseMessage("Invalid transaction context");
sres.setExceptionCode(9001);
sres.setExceptionMessage("");
res.setResponse(sres);
drools.update(res);
end
rule "requestgood"
dialect "java"
salience 1
when
Request()
response : Response(product == null)
ServiceResponse(responseCode == 0) from
response.getServiceResponse()
then
String rname = drools.getRule().getName();
System.out.println("Rule: \"" + rname + "\"
triggered");
System.out.println("Request is good");
drools.setFocus("retrieve");
end
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