Issue with timer and calendar

[srikanthvege1]

Hi,

Somewhere in the web, I got the below code and modified it to execute the process for every 3 hours, daily (weekdays). But I am getting the exception "Unable to resolve the object Alarm()". It seems like Alarm() class is not there in drools 5.3.0-Final version. I could see this class in test drools-compiler test folder but it is not there in the source folder. Please let me know the alternative way to execute this rule.

rule "week days rule"

    ruleflow-group "os-cron-service"

    dialect "java"

    calendars "weekDaysCalendar"

    timer (int:0 3h)

    when

        $a : Alarm()

    then

        insert(kcontext.getKnowledgeRuntime().startProcess("com.subProcess.Id", parameters));

end

Thanks

Srikant.

[saig0]

Hi Srikant,

you need to declare the class Alarm as a fact or an event and import it.

import your.package.Alarm;

declare Alarm
          @role( fact)  // or @role( event)
end

The class Alarm can be a pojo or be declared in rule.

The rule "week days rule" will fire when you insert a object of class Alarm.

[srikanthvege1]

Hi,

Thanks for you help. Now I got another issue.

I have 2 rules (mentioned below). 1st rule should be executed on weekdays and the next rule should be executed on Holidays.

rule "week days rule"

    ruleflow-group "os-cron-service"

    calendars "weekDayCalendar"

    timer (int:0 5h)

    when

        Alarm()

    then

        System.out.println("Week Days rule executed..");

end

rule "holiday rule"

    ruleflow-group "os-cron-service"

    calendars "holidayCalendar"

    timer (int:0 2h)

    when

      Alarm()

    then

        System.out.println("Holidays rule executed..");

end

I have created two calendar objects (one is for weekdays & another for holidays) and set them to ksession. below is the code.

WeeklyCalendar weekCalendar = new WeeklyCalendar();

Calendar weekDaysCalendar= QuartzHelper.quartzCalendarAdapter(weekCalendar);

ksession.getCalendars().set("weekDayCalendar", weekDaysCalendar);

HolidayCalendar holidayCalendar = new HolidayCalendar();

Calendar holidayCal = QuartzHelper.quartzCalendarAdapter(holidayCalendar);

ksession.getCalendars().set("holidayCalendar", holidayCal);

When I execute the rules, both the rules are getting executed and it seems like it is not considering the calendar objects. I even tried with CronCalendar also by giving the cron expression. But no luck.

Please let me know the mistake that I am doing here. I am using drools 5.3 and jbpm 5.2

Thanks

Srikant.

[saig0]

Hi Srikant,

I copied your rule and wrote a test:

@Test
          public void testCalenderRule() throws InterruptedException {                         
                        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory
                                        .newKnowledgeBuilder();
                    kbuilder.add(ResourceFactory.newClassPathResource("drools/"
                                        + "expert.drl"), ResourceType.DRL);


                    KnowledgeBaseConfiguration config = KnowledgeBaseFactory
                                        .newKnowledgeBaseConfiguration();
                    config.setOption(EventProcessingOption.STREAM); 

                    KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config);
                    kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); 

                    KnowledgeSessionConfiguration conf = KnowledgeBaseFactory
                                        .newKnowledgeSessionConfiguration();
                    ksession = kbase.newStatefulKnowledgeSession(conf, null);

                    ksession.getCalendars().set("weekDayCalendar", new Calendar() {


                              public boolean isTimeIncluded(long timestamp) {
                                        Date date = new Date(timestamp);
                                        GregorianCalendar cal = new GregorianCalendar();
                                        cal.setTime(date);


                                        int dayOfWeek = cal.get(GregorianCalendar.DAY_OF_WEEK);
                                        if (dayOfWeek != GregorianCalendar.SATURDAY
                                                            && dayOfWeek != GregorianCalendar.SUNDAY) {
                                                  return true;
                                        } else {
                                                  return false;
                                        }
                              }
                    }); 

                    ksession.getCalendars().set("holidayCalendar", new Calendar() {


                              public boolean isTimeIncluded(long timestamp) {
                                        Date date = new Date(timestamp);
                                        GregorianCalendar cal = new GregorianCalendar();
                                        cal.setTime(date);


                                        int dayOfWeek = cal.get(GregorianCalendar.DAY_OF_WEEK);
                                        if (dayOfWeek == GregorianCalendar.SATURDAY
                                                            || dayOfWeek == GregorianCalendar.SUNDAY) {
                                                  return true;
                                        } else {
                                                  return false;
                                        }
                              }
                    }); 

                    ksession.insert(new Alarm());
                    ksession.fireAllRules();
          }

Only the "week days rule" is getting executed as excepted. For me it works fine.