[rules-users] using "From" keyword in the rule

[Stephen Masters]

I guess it depends on whether there is a static connect() method on the Database class which returns a DatabaseConnection, which in turn has a method getUserRisk(POC_CombineString), which returns an instance of the TestValue class.

On a side note, it's a very bad idea to put database calls in the LHS of your rules. It invariably plays hell with performance. Although potentially it gives people like me a job re-writing slow applications, as I was doing last year, so not everyone loses out. ;)

Steve


On 27 Jul 2013, at 07:11, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:

> There is no reason why this should not compile.
> 
> I suspect that you have not posted the *accurate* text of the rule
> where that error occurred. Does the snippet you've mailed
> cause the same error?
> 
> -W
> 
> On 26/07/2013, IPatel <ishita.patel at usbank.com> wrote:
>> Thank you for your replay... here is what i am using
>> package POC2013
>> dialect "mvel"
>> import  com.usbank.tmup.rules.value.Database
>> import  com.usbank.tmup.rules.value.TestValue
>> import  com.usbank.tmup.rules.value.DatabaseConnection
>> 
>> rule "getting user"
>> 
>> when
>> $value: TestValue()
>> record : POC_CombineString($value.getField1(),$value.getField2())	
>> val : TestValue() from Database.connect().getUserRisk(record);
>> then
>> 	System.out.println("The value of the score is" + val);
>> end
>> 
>> 
>> 
>> --
>> View this message in context:
>> http://drools.46999.n3.nabble.com/using-From-keyword-in-the-rule-tp4025163p4025165.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>> 
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