使用规则模板

Question

我们使用规则模板从数据库生成规则文件，它正在运行但我们面临一个问题，即规则中的规则生成的数量与表中的记录一样多。因此，根据我的要求，它不应生成规则文件基于表格中的记录。

规则模板：

template header
alert_playload
package com.trinity;
import com.trinity.DroolsBolt;
import com.trinity.Tuplebean;
dialect "mvel"
template "sensorRule"
rule "Safety Alert"
    when
       t : Tuplebean(@{alert_playload})
    then
DroolsBolt.insertToAlertLog(t.getSmokeKey().toString(),t.getMacAddress().toString());     
end

end template

Drools Bolt逻辑：

      Class.forName("org.postgresql.Driver");
          Connection conn = DriverManager.getConnection("jdbc:postgresql://52.172.14.126:5432/iotdb",
                            "postgres", "track@123");
          Statement sta = conn.createStatement();
      String sql="SELECT min_threshould , max_threshould , sensor_name , alert_playload FROM iot.alert_configuration WHERE drools_boolean=true and alert_configuration_id=94";
      ResultSet rs = sta.executeQuery(sql);
      final ResultSetGenerator converter = new ResultSetGenerator();
      final String drl = converter.compile(rs, getRulesStream());
      System.out.println(drl);
      sta.close();
      KnowledgeBuilder kbuilder =
                KnowledgeBuilderFactory.newKnowledgeBuilder();
      kbuilder.add(ResourceFactory.newByteArrayResource(drl.getBytes()),
                     ResourceType.DRL);
      KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
      kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
      StatefulKnowledgeSession kSession = 
         kbase.newStatefulKnowledgeSession();
   /*// now create some test data
      Sensor a = new Sensor("A", 100);     
      Sensor b = new Sensor("B", 520);
      Sensor c = new Sensor("C", 610);
      kSession.insert(a); 
      kSession.insert(b);   
      kSession.insert(c);
      kSession.fireAllRules();
      System.out.println(a.getName() + "," + a.getThreshould());
      System.out.println(b.getName() + "," + b.getThreshould());
      System.out.println(c.getName() + "," + c.getThreshould());
      kSession.destroy();      
      kSession.dispose();
      kSession = kbase.newStatefulKnowledgeSession();
      Sensor aa = new Sensor("AA", 820); 
      Sensor bb = new Sensor("BB", 200);
      Sensor cc = new Sensor("CC", 141);
      kSession.insert(aa);
      kSession.insert(bb);    
      kSession.insert(cc);*/
   //   kSession.destroy();      
    //  kSession.dispose();
 //     kSession.fireAllRules();
      /*System.out.println(aa.getName() + "," + aa.getName());
      System.out.println(bb.getName() + "," + bb.getName());
      System.out.println(cc.getName() + "," + cc.getName());*/
      //kSession.fireAllRules();

      try {
          BufferedWriter out = new BufferedWriter(new FileWriter("C:/IotHub/conf/alert.drl"));
          out.write(drl.toString());
          out.close();
          }
          catch (IOException e){
          System.out.println("Exception ");
          }


      kSession.destroy();      
      kSession.dispose();
      kSession = kbase.newStatefulKnowledgeSession();
      kSession.fireAllRules();

生成的规则文件是：

rule "sensorRule_2"
    when
       $sensor : Sensor(getThreshould()>=0)
    then
      $sensor.sensor_name=":" + "Generator Fuel Level";
end

rule "sensorRule_1"
    when
       $sensor : Sensor(getThreshould()>=0)
    then
      $sensor.sensor_name=":" + "motion";
end

rule "sensorRule_0"
    when
       $sensor : Sensor(getThreshould()>=0)
    then
      $sensor.sensor_name=":" + "smke";
end