[rules-users] Retract in a function

[Ronald R. DiFrango]

I got it, the following works:

function void openRTVLines(WorkingMemory workingMemory, QueryResults
results, String status)
{
    System.out.println( "We have " + results.size() + " Open RTV Lines" );
    for ( Iterator it = results.iterator(); it.hasNext(); ) {
        QueryResult result = ( QueryResult ) it.next();
        DetailLine line = ( DetailLine ) result.get( "line" );
        line.setStatus(status);

        // Now retract those objects from Working Memory
        FactHandle handle = workingMemory.getFactHandle(line);
        System.out.println("handle : " + handle);
        workingMemory.modifyRetract(handle);
    }
}

On 10/3/07, Ronald R. DiFrango <ron.difrango at gmail.com> wrote:
>
> I have now tried the following and it did not seem to have the intended
> result of removing the detail line from working memory:
>
> function void openRTVLines(WorkingMemory workingMemory, QueryResults
> results, String status)
> {
>     System.out.println( "We have " + results.size() + " Open RTV Lines" );
>     for ( Iterator it = results.iterator(); it.hasNext(); ) {
>         QueryResult result = ( QueryResult ) it.next ();
>         DetailLine line = ( DetailLine ) result.get( "line" );
>         line.setStatus(status);
>
>         // Now retract those objects from Working Memory
>         FactHandle[] handles = result.getFactHandles();
>         System.out.println("handles.length : " + handles.length);
>         for(int i = 0; i < handles.length; i++)
>         {
>             System.out.println("Retracting : ");
>             workingMemory.retract(handles[i]);
>         }
>     }
> }
>
> Any other thoughts out there?
>
> On 10/3/07, Ronald R. DiFrango < ron.difrango at gmail.com> wrote:
> >
> > Michael,
> >
> > Those detail lines are in working memory for sure.  In fact the query it
> > self only works on working memory objects.
> >
> > As far as I know you can not place the results of a queryResult in the
> > LHS.
> >
> > Ron
> >
> > On 10/3/07, Anstis, Michael (M.) < manstis1 at ford.com> wrote:
> > >
> > >  Can you not get a reference to a DetailLine in the LHS?
> > >
> > > If you have not inserted DetailLine objects into working memory how
> > > can you expect to retract them?
> > >
> > > If you have inserted DetailLine's into working memory what does query
> > > "Open RTV Lines" return, can it be joined into the LHS? (or split into two
> > > rules)?
> > >
> > >  ------------------------------
> > > *From:* rules-users-bounces at lists.jboss.org [mailto:
> > > rules-users-bounces at lists.jboss.org] *On Behalf Of *Ronald R. DiFrango
> > > *Sent:* 03 October 2007 14:01
> > > *To:* Rules Users List
> > > *Subject:* [rules-users] Retract in a function
> > >
> > > All,
> > >
> > > I have the following function that I call from all of my rules.  When
> > > I execute this function, I need to retract that object from working memory.
> > > The problem is that when I insert the comment line below I get a compiler
> > > error saying that I can only issue a retract on fact handles.
> > >
> > > Here is an example of my rule plus the function:
> > >
> > > rule "QTY Percentage tolerance - Approval"
> > >     salience -25
> > >     no-loop  true
> > >     when
> > >         rtvHeader : RtvHeader( totalAmount : totalAmount, status not
> > > in ( StatusConstants.MATCHED, StatusConstants.APPROVAL) )
> > >         repaymentCode : RepaymentCode( code == "QTY", matchApprv ==
> > > "Y", tolDollar ==0, tolPercent != 0, tolPercent : tolPercent )
> > >         qtyOutput : QTYOutput( sumRTVQty : sumRTVQty , sumCmAndRnr :
> > > sumCmAndRnr )
> > >         eval( qtyPercentage(qtyOutput, totalAmount, tolPercent) )
> > >     then
> > >         System.out.println("QTY Percentage tolerance - No Approval");
> > >         rtvHeader.setStatus(StatusConstants.APPROVAL );
> > >         openRTVLines(drools.getWorkingMemory(),
> > > drools.getWorkingMemory().getQueryResults( "Open RTV Lines" ),
> > > StatusConstants.MATCHED_WITHIN_TOLERANCE);
> > > end
> > >
> > > function void openRTVLines(WorkingMemory workingMemory, QueryResults
> > > results, String status)
> > > {
> > >     System.out.println( "We have " + results.size() + " Open RTV
> > > Lines" );
> > >     for ( Iterator it = results.iterator(); it.hasNext(); ) {
> > >         QueryResult result = ( QueryResult ) it.next ();
> > >         DetailLine line = ( DetailLine ) result.get( "line" );
> > >         line.setStatus(status);
> > >
> > >         // I need to add this in
> > >         // workingMemory.retract(line);
> > >     }
> > > }
> > >
> > > Thanks in advance,
> > >
> > > Ron
> > >
> > >
> > >
> >
>
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