drools | rule engine, DMN engine | Code Analyzer library

by kiegroup Java Version: Current License: No License

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kandi X-RAY | drools Summary

drools is a Java library typically used in Code Quality, Code Analyzer applications. drools has no bugs, it has build file available and it has high support. However drools has 1 vulnerabilities. You can download it from GitHub, Maven.

It will save you and us a lot of time by setting up your development environment correctly. It solves all known pitfalls that can disrupt your development. It also describes all guidelines, tips and tricks. If you want your pull requests (or patches) to be merged, please respect those guidelines.

Support

Quality

Security

License

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kandi-support Support

drools has a highly active ecosystem.
It has 4343 star(s) with 2232 fork(s). There are 291 watchers for this library.
It had no major release in the last 12 months.
drools has no issues reported. There are 23 open pull requests and 0 closed requests.
It has a positive sentiment in the developer community.
The latest version of drools is current.

drools Support

Best in #Code Analyzer

Average in #Code Analyzer

drools Support

Best in #Code Analyzer

Average in #Code Analyzer

quality kandi Quality

drools has no bugs reported.

drools Quality

Best in #Code Analyzer

Average in #Code Analyzer

drools Quality

Best in #Code Analyzer

Average in #Code Analyzer

security Security

drools has 1 vulnerability issues reported (0 critical, 1 high, 0 medium, 0 low).

drools Security

Best in #Code Analyzer

Average in #Code Analyzer

drools Security

Best in #Code Analyzer

Average in #Code Analyzer

license License

drools does not have a standard license declared.
Check the repository for any license declaration and review the terms closely.
Without a license, all rights are reserved, and you cannot use the library in your applications.

drools License

Best in #Code Analyzer

Average in #Code Analyzer

drools License

Best in #Code Analyzer

Average in #Code Analyzer

build Reuse

drools releases are not available. You will need to build from source code and install.
Deployable package is available in Maven.
Build file is available. You can build the component from source.

drools Reuse

Best in #Code Analyzer

Average in #Code Analyzer

drools Reuse

Best in #Code Analyzer

Average in #Code Analyzer

Top functions reviewed by kandi - BETA

kandi has reviewed drools and discovered the below as its top functions. This is intended to give you an instant insight into drools implemented functionality, and help decide if they suit your requirements.

matchTimeInterval
assumes primary key
identifier suffix
Compute the time after the given date .
Match a variable definition
Build the trait map field .
Convert an expression to a typed expression
From an accumulator .
Creates a new XStream .
parses a floating pointLiteral

drools Key Features

Drools is a rule engine, DMN engine and complex event processing (CEP) engine for Java.

drools Examples and Code Snippets

See all related Code Snippets

How to deal with publishing promotion issues Hybris 2105?

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  import de.hybris.platform.commerceservices.search.pagedata.PageableData
  import de.hybris.platform.servicelayer.search.FlexibleSearchQuery
  import com.google.common.collect.ImmutableMap;
  import de.hybris.platform.servicelayer.interceptor.impl.InterceptorExecutionPolicy;
  import de.hybris.platform.servicelayer.session.SessionExecutionBody;
  import de.hybris.platform.servicelayer.session.SessionService;
  import com.google.common.collect.ImmutableSet;


  int start = 0
  int pageSize = 1000
  int total = pageSize

  final FlexibleSearchQuery searchQuery = new FlexibleSearchQuery("select {PK} from {DroolsRule} ORDER BY {PK}")

  searchQuery.setCount(pageSize)
  searchQuery.setNeedTotal(true)

  while (start < total) {
      searchQuery.setStart(start)
      def searchResult = flexibleSearchService.search(searchQuery)

      searchResult.getResult().each {
          final Map<String, Object> params = ImmutableMap.of(InterceptorExecutionPolicy.DISABLED_INTERCEPTOR_TYPES,
              ImmutableSet.of(InterceptorExecutionPolicy.InterceptorType.PREPARE,InterceptorExecutionPolicy.InterceptorType.VALIDATE));

          sessionService.executeInLocalViewWithParams(params, new SessionExecutionBody() {
              @Override
              public void executeWithoutResult() {
                  it.setRuleContent("");
                  modelService.save(it);
              }
          });
      }

      total = searchResult.getTotalCount()
      start += pageSize
  }

  println "Script has been completed."

What does a drools fact check (when) return when one uses the "in" operator

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class Vgdoc {
  public String getCode() { ... }
  public String getColour() { ... }
}

rule "One"
when
  vg1: Vgdoc( code in ("IA1003", "IA1004"),
              colour == "red" )
then
  Systen.out.println("Rule 1 fired");
end

Vgdoc{ code: "IA1003", colour: "red" } // A
Vgdoc{ code: "IA1004", colour: "red" } // B
Vgdoc{ code: "IA1005", colour: "red" } // C
Vgdoc{ code: "IA1003", colour: "blue" } // D

rule "IA1003 and IA1004 with red"
when
  vgList: List() from collect( Vgdoc( code in ("IA1003", "IA1004"), colour == "red" ))
then
  System.out.println("Rule fired, match count: " + vgList.size());
  // vgList will contain all items that match the conditions for code and colour
end

-----------------------

class Vgdoc {
  public String getCode() { ... }
  public String getColour() { ... }
}

rule "One"
when
  vg1: Vgdoc( code in ("IA1003", "IA1004"),
              colour == "red" )
then
  Systen.out.println("Rule 1 fired");
end

Vgdoc{ code: "IA1003", colour: "red" } // A
Vgdoc{ code: "IA1004", colour: "red" } // B
Vgdoc{ code: "IA1005", colour: "red" } // C
Vgdoc{ code: "IA1003", colour: "blue" } // D

rule "IA1003 and IA1004 with red"
when
  vgList: List() from collect( Vgdoc( code in ("IA1003", "IA1004"), colour == "red" ))
then
  System.out.println("Rule fired, match count: " + vgList.size());
  // vgList will contain all items that match the conditions for code and colour
end

-----------------------

class Vgdoc {
  public String getCode() { ... }
  public String getColour() { ... }
}

rule "One"
when
  vg1: Vgdoc( code in ("IA1003", "IA1004"),
              colour == "red" )
then
  Systen.out.println("Rule 1 fired");
end

Vgdoc{ code: "IA1003", colour: "red" } // A
Vgdoc{ code: "IA1004", colour: "red" } // B
Vgdoc{ code: "IA1005", colour: "red" } // C
Vgdoc{ code: "IA1003", colour: "blue" } // D

rule "IA1003 and IA1004 with red"
when
  vgList: List() from collect( Vgdoc( code in ("IA1003", "IA1004"), colour == "red" ))
then
  System.out.println("Rule fired, match count: " + vgList.size());
  // vgList will contain all items that match the conditions for code and colour
end

-----------------------

class Vgdoc {
  public String getCode() { ... }
  public String getColour() { ... }
}

rule "One"
when
  vg1: Vgdoc( code in ("IA1003", "IA1004"),
              colour == "red" )
then
  Systen.out.println("Rule 1 fired");
end

Vgdoc{ code: "IA1003", colour: "red" } // A
Vgdoc{ code: "IA1004", colour: "red" } // B
Vgdoc{ code: "IA1005", colour: "red" } // C
Vgdoc{ code: "IA1003", colour: "blue" } // D

rule "IA1003 and IA1004 with red"
when
  vgList: List() from collect( Vgdoc( code in ("IA1003", "IA1004"), colour == "red" ))
then
  System.out.println("Rule fired, match count: " + vgList.size());
  // vgList will contain all items that match the conditions for code and colour
end

Drools Stream mode negative patterns

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declare MetaMessage
        @role(event)
end
 
rule 'rule1'
    when  
        $inMess : MetaMessage() 
        not(MetaMessage(this != $inMess, this after [0s,10s] $inMess) )
    then  
        //do things
end

kieSession.insert(metaMessage);
kieSession.fireAllRules();

-----------------------

declare MetaMessage
        @role(event)
end
 
rule 'rule1'
    when  
        $inMess : MetaMessage() 
        not(MetaMessage(this != $inMess, this after [0s,10s] $inMess) )
    then  
        //do things
end

kieSession.insert(metaMessage);
kieSession.fireAllRules();

Generic classes within Drools-WorkBench

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@DroolsSession(resources = "draft/inputObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testInputObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            InputObject inputObject = new InputObject();
            inputObject.setTransactionId(i);
            inputObject.setRuleSet("set" + i);
            inputObject.setInput(ImmutableMap.of("DyrAlder", i));
            inputObject.setValidationResults(new ArrayList<>());
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.InputObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:InputObject(ruleSet == "set3", input["DyrAlder"] < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class InputObject {
    private Integer primaryKey;
    private Integer sessionId;
    private Integer transactionId;
    private String ruleSet;
    private Map<String, Object> input;
    private List<ValidationResult> validationResults;
    // getters/setters

@DroolsSession(resources = "draft/droolsObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testDroolsObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            DroolsObject inputObject = new DroolsObject();
            inputObject.put("ruleSet", "set" + i);
            inputObject.put("DyrAlder", i);
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.DroolsObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:DroolsObject(ruleSet == "set3", DyrAlder < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class DroolsObject extends LinkedHashMap<String, Object> {
    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

-----------------------

@DroolsSession(resources = "draft/inputObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testInputObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            InputObject inputObject = new InputObject();
            inputObject.setTransactionId(i);
            inputObject.setRuleSet("set" + i);
            inputObject.setInput(ImmutableMap.of("DyrAlder", i));
            inputObject.setValidationResults(new ArrayList<>());
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.InputObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:InputObject(ruleSet == "set3", input["DyrAlder"] < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class InputObject {
    private Integer primaryKey;
    private Integer sessionId;
    private Integer transactionId;
    private String ruleSet;
    private Map<String, Object> input;
    private List<ValidationResult> validationResults;
    // getters/setters

@DroolsSession(resources = "draft/droolsObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testDroolsObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            DroolsObject inputObject = new DroolsObject();
            inputObject.put("ruleSet", "set" + i);
            inputObject.put("DyrAlder", i);
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.DroolsObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:DroolsObject(ruleSet == "set3", DyrAlder < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class DroolsObject extends LinkedHashMap<String, Object> {
    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

-----------------------

@DroolsSession(resources = "draft/inputObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testInputObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            InputObject inputObject = new InputObject();
            inputObject.setTransactionId(i);
            inputObject.setRuleSet("set" + i);
            inputObject.setInput(ImmutableMap.of("DyrAlder", i));
            inputObject.setValidationResults(new ArrayList<>());
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.InputObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:InputObject(ruleSet == "set3", input["DyrAlder"] < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class InputObject {
    private Integer primaryKey;
    private Integer sessionId;
    private Integer transactionId;
    private String ruleSet;
    private Map<String, Object> input;
    private List<ValidationResult> validationResults;
    // getters/setters

@DroolsSession(resources = "draft/droolsObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testDroolsObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            DroolsObject inputObject = new DroolsObject();
            inputObject.put("ruleSet", "set" + i);
            inputObject.put("DyrAlder", i);
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.DroolsObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:DroolsObject(ruleSet == "set3", DyrAlder < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class DroolsObject extends LinkedHashMap<String, Object> {
    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

-----------------------

@DroolsSession(resources = "draft/inputObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testInputObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            InputObject inputObject = new InputObject();
            inputObject.setTransactionId(i);
            inputObject.setRuleSet("set" + i);
            inputObject.setInput(ImmutableMap.of("DyrAlder", i));
            inputObject.setValidationResults(new ArrayList<>());
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.InputObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:InputObject(ruleSet == "set3", input["DyrAlder"] < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class InputObject {
    private Integer primaryKey;
    private Integer sessionId;
    private Integer transactionId;
    private String ruleSet;
    private Map<String, Object> input;
    private List<ValidationResult> validationResults;
    // getters/setters

@DroolsSession(resources = "draft/droolsObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testDroolsObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            DroolsObject inputObject = new DroolsObject();
            inputObject.put("ruleSet", "set" + i);
            inputObject.put("DyrAlder", i);
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.DroolsObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:DroolsObject(ruleSet == "set3", DyrAlder < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class DroolsObject extends LinkedHashMap<String, Object> {
    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

-----------------------

@DroolsSession(resources = "draft/inputObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testInputObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            InputObject inputObject = new InputObject();
            inputObject.setTransactionId(i);
            inputObject.setRuleSet("set" + i);
            inputObject.setInput(ImmutableMap.of("DyrAlder", i));
            inputObject.setValidationResults(new ArrayList<>());
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.InputObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:InputObject(ruleSet == "set3", input["DyrAlder"] < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class InputObject {
    private Integer primaryKey;
    private Integer sessionId;
    private Integer transactionId;
    private String ruleSet;
    private Map<String, Object> input;
    private List<ValidationResult> validationResults;
    // getters/setters

@DroolsSession(resources = "draft/droolsObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testDroolsObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            DroolsObject inputObject = new DroolsObject();
            inputObject.put("ruleSet", "set" + i);
            inputObject.put("DyrAlder", i);
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.DroolsObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:DroolsObject(ruleSet == "set3", DyrAlder < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class DroolsObject extends LinkedHashMap<String, Object> {
    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

-----------------------

@DroolsSession(resources = "draft/inputObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testInputObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            InputObject inputObject = new InputObject();
            inputObject.setTransactionId(i);
            inputObject.setRuleSet("set" + i);
            inputObject.setInput(ImmutableMap.of("DyrAlder", i));
            inputObject.setValidationResults(new ArrayList<>());
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.InputObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:InputObject(ruleSet == "set3", input["DyrAlder"] < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class InputObject {
    private Integer primaryKey;
    private Integer sessionId;
    private Integer transactionId;
    private String ruleSet;
    private Map<String, Object> input;
    private List<ValidationResult> validationResults;
    // getters/setters

@DroolsSession(resources = "draft/droolsObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testDroolsObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            DroolsObject inputObject = new DroolsObject();
            inputObject.put("ruleSet", "set" + i);
            inputObject.put("DyrAlder", i);
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

package draft;
//generated from Decision Table
import draft.DroolsObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:DroolsObject(ruleSet == "set3", DyrAlder < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

public class DroolsObject extends LinkedHashMap<String, Object> {
    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

drools getting error : handle not found for object is it in working memory

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then
  $ins.setCategory("A");
  update( $pcr );
end

then
  $ins.setCategory("A");
  modify( $pcr ){ 
    setInsuranceTypes($insuranceTypes)
  }     
end

$ins: InsuranceType( name == "TPD" , category == "D" ) from $insuranceTypes

-----------------------

then
  $ins.setCategory("A");
  update( $pcr );
end

then
  $ins.setCategory("A");
  modify( $pcr ){ 
    setInsuranceTypes($insuranceTypes)
  }     
end

$ins: InsuranceType( name == "TPD" , category == "D" ) from $insuranceTypes

-----------------------

then
  $ins.setCategory("A");
  update( $pcr );
end

then
  $ins.setCategory("A");
  modify( $pcr ){ 
    setInsuranceTypes($insuranceTypes)
  }     
end

$ins: InsuranceType( name == "TPD" , category == "D" ) from $insuranceTypes

Drools - how do I compare a string value present in a Java Object which is present inside a List

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rule "Example"
when
  Premium( $insuranceTypes: insuranceTypes )
  exists( InsuranceType( name == "TPD" ) from $insuranceTypes )
then
  System.out.println("Error");
end

How to loop through a list to check if an item is a memberOf another list

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rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject($listOfString : listOfString)
            value: String(value memberOf "F77 EOO F99" ) from $listOfString
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

-----------------------

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject($listOfString : listOfString)
            value: String(value in ("F77", "EOO", "F99") ) from $listOfString
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

import static org.apache.commons.collections4.CollectionUtils.containsAny;

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject(containsAny(listOfString, "F77", "EOO", "F99"))
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

import static org.apache.commons.collections4.CollectionUtils.intersection;
import static com.google.common.collect.Sets.newHashSet;

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject(
            $values : intersection(listOfString, newHashSet("F77", "EOO", "F99")), 
            !$values.isEmpty())
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
        System.out.println($values);
end

-----------------------

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject($listOfString : listOfString)
            value: String(value in ("F77", "EOO", "F99") ) from $listOfString
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

import static org.apache.commons.collections4.CollectionUtils.containsAny;

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject(containsAny(listOfString, "F77", "EOO", "F99"))
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

import static org.apache.commons.collections4.CollectionUtils.intersection;
import static com.google.common.collect.Sets.newHashSet;

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject(
            $values : intersection(listOfString, newHashSet("F77", "EOO", "F99")), 
            !$values.isEmpty())
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
        System.out.println($values);
end

-----------------------

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject($listOfString : listOfString)
            value: String(value in ("F77", "EOO", "F99") ) from $listOfString
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

import static org.apache.commons.collections4.CollectionUtils.containsAny;

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject(containsAny(listOfString, "F77", "EOO", "F99"))
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

import static org.apache.commons.collections4.CollectionUtils.intersection;
import static com.google.common.collect.Sets.newHashSet;

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject(
            $values : intersection(listOfString, newHashSet("F77", "EOO", "F99")), 
            !$values.isEmpty())
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
        System.out.println($values);
end

Problem with pattern matching in Drools 7.57.0.Final

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@DroolsSession(
        resources = "classpath*:**/section06/step5/*",
        showStateTransitionPopup = true)
public class Section6Step5Test {
    
    @RegisterExtension
    public DroolsAssert drools = new DroolsAssert();
    
    @Test
    public void test() {
        
        ApplicationRepository.getPassports().forEach(drools::insert);
        ApplicationRepository.getVisaApplications().forEach(drools::insert);
        
        drools.getSession().getAgenda().getAgendaGroup("issue-visa").setFocus();
        drools.getSession().getAgenda().getAgendaGroup("validate-application").setFocus();
        drools.getSession().getAgenda().getAgendaGroup("validate-passport").setFocus();
        
        drools.fireAllRules();
        
        assertEquals(1, drools.getObjects(Visa.class).size());
    }
}

How to test list length in Drools 7.59?

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rule "Person has 3 or more existing checked out books"
when
  BookEvent( type == BookEventType.BORROW )
  $person: Person( $books: checkedOutBooks, $books.size >= 3 )
  $book1: Book() from $person.checkedOutBooks.get(0)
  $book3: Book(name == 'book3') from $person.checkedOutBooks
  $bookNames: List(size >= 3) from accumulate (Book($name: name) from $books, collectList($name)) 
then
  System.out.println("First book " + $book1);
  System.out.println("Third book " + $book3);
  System.out.println("Book names " + $bookNames);
  System.out.println("Books " + $books);
end

Potential OptaPlanner/Drools Bug: Strange MultiAccumulate ClassCastException

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$cc : MyConstraintConfiguration()
accumulate(PlanningEntity($key : key, 
                          $value : $cc.getCachedValue($key)
...

See all related Code Snippets

Community Discussions

Trending Discussions on drools

How to deal with publishing promotion issues Hybris 2105?
Can a rules file have a dependency on other rules?
What does a drools fact check (when) return when one uses the "in" operator
Drools Stream mode negative patterns
Optaplanner's benchmark warm up - OutOfMemory
Generic classes within Drools-WorkBench
Is Drools Business Rules Management impacted by CVE-2021-44228
drools getting error : handle not found for object is it in working memory
Drools - how do I compare a string value present in a Java Object which is present inside a List
How to loop through a list to check if an item is a memberOf another list

Trending Discussions on drools

QUESTION

How to deal with publishing promotion issues Hybris 2105?

Asked 2022-Feb-16 at 07:14

We have migrated our SAP Hybris from 2011 to 2105.

There are some issues coming while publishing new promotions, which seem to work fine in the lower version.When we publish a promotion(even OOB promotion like in Conditions CMS Site and in Action 10% discount on cart) and when I publish the promotion, I get an error like:

   ruleOrderEntryFixedDiscountAction.executeAction(new 
   DefaultDroolsRuleActionContext(variables, kcontext), 
   ["value_uuid":"6e732228-89fe-4f4e-8dea-5235dee2ccd7", 
    "bundleSize":new Integer(4), "bundleSize_uuid":"49803399- 
     53a8-44b6-85cd-35c1b83235d7", "bundleLimit_uuid":"778299c6- 
     75bd-414e-97bb-3e5fe1aa0bf9", "bundleLimit":new Integer(2), 
     "value":new BigDecimal("50")]);
     $groupExecution.trackRuleGroupExecution($config);:
     [Error: unable to resolve method using strict-mode: 
     org.drools.core.spi.KnowledgeHelper.$groupExecution()]

ANSWER

Answered 2022-Feb-02 at 20:56

This is due to some changes in the drools rule engine. This causes an exception during the parsing of older Drools Rule.

To solve this, you can

Make the content of all drools rules blank, and republish all rules to have correct and active drools rules for all your promotions. Example of a script: You need to disable the interceptors as they might prevent you from changing the rule content

  import de.hybris.platform.commerceservices.search.pagedata.PageableData
  import de.hybris.platform.servicelayer.search.FlexibleSearchQuery
  import com.google.common.collect.ImmutableMap;
  import de.hybris.platform.servicelayer.interceptor.impl.InterceptorExecutionPolicy;
  import de.hybris.platform.servicelayer.session.SessionExecutionBody;
  import de.hybris.platform.servicelayer.session.SessionService;
  import com.google.common.collect.ImmutableSet;


  int start = 0
  int pageSize = 1000
  int total = pageSize

  final FlexibleSearchQuery searchQuery = new FlexibleSearchQuery("select {PK} from {DroolsRule} ORDER BY {PK}")

  searchQuery.setCount(pageSize)
  searchQuery.setNeedTotal(true)

  while (start < total) {
      searchQuery.setStart(start)
      def searchResult = flexibleSearchService.search(searchQuery)

      searchResult.getResult().each {
          final Map<String, Object> params = ImmutableMap.of(InterceptorExecutionPolicy.DISABLED_INTERCEPTOR_TYPES,
              ImmutableSet.of(InterceptorExecutionPolicy.InterceptorType.PREPARE,InterceptorExecutionPolicy.InterceptorType.VALIDATE));

          sessionService.executeInLocalViewWithParams(params, new SessionExecutionBody() {
              @Override
              public void executeWithoutResult() {
                  it.setRuleContent("");
                  modelService.save(it);
              }
          });
      }

      total = searchResult.getTotalCount()
      start += pageSize
  }

  println "Script has been completed."

Remove all DroolsRule objects if you no longer need them. Do note that removing these old rules might have impact on existing orders tied to that Drools rule. The promotion results will still be attached, but it will be hard to tell what promotion triggered that result.

I would advise going for the first option as to not lose any data

Don't forget to republish your rules after performing either of the steps

Source https://stackoverflow.com/questions/70929736

QUESTION

What does a drools fact check (when) return when one uses the "in" operator

Asked 2022-Jan-18 at 16:00

I have the following rule

rule One
 when
    vg1 : Vgdoc(code() in ("IA1003", "IA1004"), colour == "red")
 then
     .. do something with vg1
end

when I use the vg1 in the then clause I see that it represents one object but what if both ("IA1003", "IA1004") exists? does drools only send the first one or both? and if it sends both how can I check it.

Is it possible to do something like this to

vglist : List() from collect (Vgdok(code() in ("IA1003", "IA1004")))

will this list contain both fact if they exists in the memory?

cheers

ANSWER

Answered 2022-Jan-18 at 16:00

Your rule will hit for each item in working memory that matches.

Simplifying things, let's say that your model looks like this:

class Vgdoc {
  public String getCode() { ... }
  public String getColour() { ... }
}

And your rule is like what you have, syntax corrected:

rule "One"
when
  vg1: Vgdoc( code in ("IA1003", "IA1004"),
              colour == "red" )
then
  Systen.out.println("Rule 1 fired");
end

And you have objects in working memory:

Vgdoc{ code: "IA1003", colour: "red" } // A
Vgdoc{ code: "IA1004", colour: "red" } // B
Vgdoc{ code: "IA1005", colour: "red" } // C
Vgdoc{ code: "IA1003", colour: "blue" } // D

Then your rule will fire twice, once for the item I commented as "A" and once for the item I commented as "B". (Eg. there will be two instances of Rule 1 fired printed.) It will not fire for item commented "C" because the code does not match, and it will not fire for item commented "D" because the colour field does not match.

Now, if you want to only fire once and to do something with the collection of all Vgdoc matching the condition (color 'red' and code 'IA1003' or 'IA1004'), then yes you'd use a collect. Something like this:

rule "IA1003 and IA1004 with red"
when
  vgList: List() from collect( Vgdoc( code in ("IA1003", "IA1004"), colour == "red" ))
then
  System.out.println("Rule fired, match count: " + vgList.size());
  // vgList will contain all items that match the conditions for code and colour
end

This version of the rule, with the same inputs from before, will fire exactly once and will print: Rule fired, match count: 2.

Which one you choose to use depends on your use case.

Source https://stackoverflow.com/questions/70757530

QUESTION

Drools Stream mode negative patterns

Asked 2022-Jan-10 at 16:48

i have a question about stream mode in Drools. I'm using this rule

declare MetaMessage
        @role(event)
end
 
rule 'rule1' ruleflow-group 'default'  
    when  
        $inMess : MetaMessage() from entry-point 'default'
        not(MetaMessage(this != $inMess, this after [0s,10s] $inMess) from entry-point 'default')
    then  
        //do things
end

If i send a MetaMessage, i expect the rule to execute after the 10s specified, but nothing appens. If i send a new MetaMessage, after 10 seconds, the rule executes.

Edit: if i change the rule and take away the not, it works like a charm

I'm not sure what am i doing wrong.

This is how i create the KieBase

KieBaseConfiguration config = KieServices.Factory.get().newKieBaseConfiguration();
config.setOption(EventProcessingOption.STREAM);
KieBase kieBase = kieHelper.build(config);
KieSession kieSession = kieBase.newKieSession();

Edit 2 I fire the rules using fireAllRules() everytime a new MetaMessage is inserted in a Kafka queue. So i have a consumer collecting messages and inserting them in the session like this

EntryPoint ep = kieSession.getEntryPoint("default");
ep.insert(metaMessage);
kieSession.fireAllRules();

Edit 3 I have another simple rule that gets executed toghether with the previous one

rule "AccumulatedTest"

    when
        accumulate(MetaMessage( timestamp > 0 ); $cnt: count(1))
    then
        log.info("Message n: "+$cnt);
end

The first time a message gets inserted (when the kieSession is newly created) i get the info "Message n: 0". But then this rule does not fire anymore.

If any other message gets inserted in the session the rule does not fire

ANSWER

Answered 2021-Dec-26 at 23:47

You use ruleflow-group 'default', thus you must set focus to agenda group to get rule executed, like getSession().getAgenda().getAgendaGroup("default").setFocus();

Most likely you set focus before or after event insertion. After inserting first message you set focus but no rule was added to the agenda (rule is not yet eligible for execution) at that time, and focus get reset to main agenda group. After 10 seconds you state that no rule was triggered despite that rule was added to 'default' agenda (because main group has focus). You insert second message and set focus to 'default' agenda which executes the rule from the agenda being triggered by the first message.

Rule is getting executed if you

remove ruleflow-group (latest documentation promote agenda-group)
add auto-focus true to the rule
set agenda group focus after 10 seconds

See how agenda group works

Source https://stackoverflow.com/questions/70450846

QUESTION

Optaplanner's benchmark warm up - OutOfMemory

Asked 2022-Jan-04 at 12:50

While trying to test the solution's solvers using a benchmark configuration, I encounter the follow exception :

2021-12-22 15:24:37.328  WARN 22684 --- [    Test worker] c.o.b.i.D.singleBenchmarkRunnerException : The warm up singleBenchmarkRunner (Problem_0_Currently used_0) with random seed (null) failed.

java.lang.OutOfMemoryError: Java heap space

2021-12-22 15:24:37.329  WARN 22684 --- [    Test worker] c.o.b.i.D.singleBenchmarkRunnerException : The warm up singleBenchmarkRunner (Problem_0_Currently used_0) with random seed (null) failed.

java.lang.OutOfMemoryError: Java heap space

2021-12-22 15:24:37.330  WARN 22684 --- [    Test worker] c.o.b.i.D.singleBenchmarkRunnerException : The warm up singleBenchmarkRunner (Problem_0_Currently used_0) with random seed (null) failed.

java.lang.OutOfMemoryError: Java heap space
    at java.base/java.lang.Long.valueOf(Long.java:1207)
    at myrostering.solver.PEC.LambdaExtractorEC9F24820AB70C5865CE63ED29F967E9.apply(LambdaExtractorEC9F24820AB70C5865CE63ED29F967E9.java:69)
    at myrostering.solver.PEC.LambdaExtractorEC9F24820AB70C5865CE63ED29F967E9.apply(LambdaExtractorEC9F24820AB70C5865CE63ED29F967E9.java:1)
    at org.drools.model.functions.Function1$Impl.apply(Function1.java:35)
    at org.drools.modelcompiler.constraints.LambdaReadAccessor.getValue(LambdaReadAccessor.java:42)
    at org.drools.core.rule.Declaration.getValue(Declaration.java:258)
    at org.drools.core.rule.Declaration.getValue(Declaration.java:253)
    at org.drools.modelcompiler.constraints.BindingEvaluator.getArgument(BindingEvaluator.java:59)
    at org.drools.modelcompiler.constraints.ConstraintEvaluator$InnerEvaluator.getArgument(ConstraintEvaluator.java:242)
    at org.drools.modelcompiler.constraints.ConstraintEvaluator$InnerEvaluator$_2.evaluate(ConstraintEvaluator.java:309)
    at org.drools.modelcompiler.constraints.ConstraintEvaluator.evaluate(ConstraintEvaluator.java:124)
    at org.drools.modelcompiler.constraints.LambdaConstraint.isAllowedCachedLeft(LambdaConstraint.java:187)
    at org.drools.core.common.SingleBetaConstraints.isAllowedCachedLeft(SingleBetaConstraints.java:132)
    at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:178)
    at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:89)
    at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:591)
    at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:558)
    at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:385)
    at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:345)
    at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:181)
    at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:139)
    at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:235)
    at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:91)
    at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:33)
    at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
    at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:753)
    at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:700)
    at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:692)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1225)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1216)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1200)
    at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:105)

Here is the test class I ran:

@SpringBootTest(classes = MyApplication.class)
@EnableConfigurationProperties({ApplicationProperties.class, MyRosterProperties.class})
public class SolverBenchmarkTest {

    private PlannerBenchmarkFactory benchmarkFactory = PlannerBenchmarkFactory.createFromXmlResource(
            "myrostering/benchmark/benchmarkSolverConfig.xml");

    @Autowired
    MyRosterGenerator myRosterGenerator;

    @Test
    public void benchmarkBasicRostering() {
        MyRoster mr = myRosterGenerator.createMyRoster();
        PlannerBenchmark benchmark = benchmarkFactory.buildPlannerBenchmark(mr);
        benchmark.benchmarkAndShowReportInBrowser();    
    }

}

Here is the benchmark configuration file :

<?xml version="1.0" encoding="UTF-8"?>
<plannerBenchmark xmlns="https://www.optaplanner.org/xsd/benchmark" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="https://www.optaplanner.org/xsd/benchmark https://www.optaplanner.org/xsd/benchmark/benchmark.xsd">

    <benchmarkDirectory>local/benchmark/data/my-roster</benchmarkDirectory>
    <parallelBenchmarkCount>AUTO</parallelBenchmarkCount>
    <warmUpSecondsSpentLimit>30</warmUpSecondsSpentLimit>

    <inheritedSolverBenchmark>
        <solver>
            <!-- This part of the solver configuration must be the same as the one used by the planner, otherwise, the benchmark test is pointless -->
            <moveThreadCount>4</moveThreadCount>
            <solutionClass>myrostering.domain.MyRoster</solutionClass>
            <entityClass>myrostering.domain.Assignment</entityClass>
            <scoreDirectorFactory>
                <scoreDrl>myrostering/solver/myRosteringScoreRules.drl</scoreDrl>
            </scoreDirectorFactory>
            <termination>
                <!-- Adding this secondsSpentLimit (contrary to no limit set for the planner) to avoid the benchmark running for too long -->
                <secondsSpentLimit>60</secondsSpentLimit>
                <bestScoreLimit>0hard/0medium/0soft</bestScoreLimit>
            </termination>
            <constructionHeuristic>
                <constructionHeuristicType>STRONGEST_FIT</constructionHeuristicType>
            </constructionHeuristic>
        </solver>
    </inheritedSolverBenchmark>

    <solverBenchmark>
        <name>Currently used</name>
        <solver>
            <localSearch>
                <unionMoveSelector>
                    <moveListFactory>
                        <cacheType>PHASE</cacheType>
                        <moveListFactoryClass>
                            myrostering.solver.move.factory.ChangeMoveFactory
                        </moveListFactoryClass>
                    </moveListFactory>
                    <moveListFactory>
                        <cacheType>PHASE</cacheType>
                        <moveListFactoryClass>
                            myrostering.solver.move.factory.SwapMoveFactory
                        </moveListFactoryClass>
                    </moveListFactory>
                </unionMoveSelector>
                <acceptor>
                    <entityTabuSize>5</entityTabuSize>
                    <simulatedAnnealingStartingTemperature>15000hard/10medium/1000soft</simulatedAnnealingStartingTemperature>
                </acceptor>
                <forager>
                    <acceptedCountLimit>4</acceptedCountLimit>
                </forager>
            </localSearch>
        </solver>
    </solverBenchmark>
</plannerBenchmark>

Also, I'd like to add that we run the solver.solve() without an issue - even if the dataset is quite large (150 to 300 Mo for the file containing the solution when serialized). So I'm a bit surprised when the benchmark fails on warm up...

EDIT:

I've changed the configuration for these two parameters :

<parallelBenchmarkCount>1</parallelBenchmarkCount>
...
<secondsSpentLimit>600</secondsSpentLimit>

But I still got the following exception :

2022-01-03 10:53:49.850  INFO 21696 --- [nchmarkThread-1] o.d.c.kie.builder.impl.KieContainerImpl  : Start creation of KieBase: defaultKieBase
2022-01-03 10:53:49.909  INFO 21696 --- [nchmarkThread-1] o.d.c.kie.builder.impl.KieContainerImpl  : End creation of KieBase: defaultKieBase
2022-01-03 10:54:32.585  INFO 21696 --- [nchmarkThread-1] o.o.core.impl.solver.DefaultSolver       : Solving started: time spent (41506), best score (-38295462hard/38260medium/3640soft), environment mode (REPRODUCIBLE), move thread count (4), random (JDK with seed 0).
2022-01-03 10:54:33.611 ERROR 21696 --- [nchmarkThread-1] o.o.core.impl.solver.thread.ThreadUtils  : Multithreaded Local Search's ExecutorService didn't terminate within timeout (1 seconds).
2022-01-03 10:54:33.611  INFO 21696 --- [nchmarkThread-1] o.o.c.i.h.thread.MoveThreadRunner        : Score calculation speed will be too low because move thread (0)'s destroy wasn't processed soon enough.
2022-01-03 10:54:33.611  INFO 21696 --- [nchmarkThread-1] o.o.c.i.h.thread.MoveThreadRunner        : Score calculation speed will be too low because move thread (1)'s destroy wasn't processed soon enough.
2022-01-03 10:54:33.611  INFO 21696 --- [nchmarkThread-1] o.o.c.i.h.thread.MoveThreadRunner        : Score calculation speed will be too low because move thread (2)'s destroy wasn't processed soon enough.
2022-01-03 10:54:33.611  INFO 21696 --- [nchmarkThread-1] o.o.c.i.h.thread.MoveThreadRunner        : Score calculation speed will be too low because move thread (3)'s destroy wasn't processed soon enough.
2022-01-03 10:54:33.612  INFO 21696 --- [nchmarkThread-1] .c.i.c.DefaultConstructionHeuristicPhase : Construction Heuristic phase (0) ended: time spent (42533), best score (-38295462hard/38260medium/3640soft), score calculation speed (0/sec), step total (0).
2022-01-03 10:56:00.115  WARN 21696 --- [    Test worker] c.o.b.i.D.singleBenchmarkRunnerException : The subSingleBenchmarkRunner (Problem_0_Currently used_0) with random seed (null) failed.

java.lang.OutOfMemoryError: Java heap space
    at java.base/java.util.Arrays.copyOf(Arrays.java:3480)
    at java.base/java.util.ArrayList.grow(ArrayList.java:237)
    at java.base/java.util.ArrayList.grow(ArrayList.java:244)
    at java.base/java.util.ArrayList.add(ArrayList.java:454)
    at java.base/java.util.ArrayList.add(ArrayList.java:467)
    at be.myrostering.solver.move.factory.MySwapMoveFactory.createMoveList(MySwapMoveFactory.java:50)
    at be.myrostering.solver.move.factory.MySwapMoveFactory.createMoveList(MySwapMoveFactory.java:30)
    at org.optaplanner.core.impl.heuristic.selector.move.factory.MoveListFactoryToMoveSelectorBridge.constructCache(MoveListFactoryToMoveSelectorBridge.java:72)
    at org.optaplanner.core.impl.heuristic.selector.common.SelectionCacheLifecycleBridge.phaseStarted(SelectionCacheLifecycleBridge.java:51)
    at org.optaplanner.core.impl.phase.event.PhaseLifecycleSupport.firePhaseStarted(PhaseLifecycleSupport.java:37)
    at org.optaplanner.core.impl.heuristic.selector.AbstractSelector.phaseStarted(AbstractSelector.java:50)
    at org.optaplanner.core.impl.phase.event.PhaseLifecycleSupport.firePhaseStarted(PhaseLifecycleSupport.java:37)
    at org.optaplanner.core.impl.heuristic.selector.AbstractSelector.phaseStarted(AbstractSelector.java:50)
    at org.optaplanner.core.impl.localsearch.decider.LocalSearchDecider.phaseStarted(LocalSearchDecider.java:94)
    at org.optaplanner.core.impl.localsearch.decider.MultiThreadedLocalSearchDecider.phaseStarted(MultiThreadedLocalSearchDecider.java:92)
    at org.optaplanner.core.impl.localsearch.DefaultLocalSearchPhase.phaseStarted(DefaultLocalSearchPhase.java:141)
    at org.optaplanner.core.impl.localsearch.DefaultLocalSearchPhase.solve(DefaultLocalSearchPhase.java:82)
    at org.optaplanner.core.impl.solver.AbstractSolver.runPhases(AbstractSolver.java:99)
    at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:192)
    at org.optaplanner.benchmark.impl.SubSingleBenchmarkRunner.call(SubSingleBenchmarkRunner.java:122)
    at org.optaplanner.benchmark.impl.SubSingleBenchmarkRunner.call(SubSingleBenchmarkRunner.java:42)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
    at java.base/java.lang.Thread.run(Thread.java:832)

2022-01-03 10:56:00.603  INFO 21696 --- [    Test worker] o.o.b.impl.report.BenchmarkReport        : Generating benchmark report...

VERSION_2_3_31
java.lang.NoSuchFieldError: VERSION_2_3_31
    at org.optaplanner.benchmark.impl.report.BenchmarkReport.writeHtmlOverviewFile(BenchmarkReport.java:828)
    at org.optaplanner.benchmark.impl.report.BenchmarkReport.writeReport(BenchmarkReport.java:318)
    at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmarkingEnded(DefaultPlannerBenchmark.java:311)
    at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmark(DefaultPlannerBenchmark.java:100)
    at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmarkAndShowReportInBrowser(DefaultPlannerBenchmark.java:424)

On a final note, it appears that the problem might not be linked to Optaplanner (because the out-of-memory is triggered in MySwapMoveFactory) - if so, I'll close this post. But it would be still odd that it works when running the solver but not the benchmark...

ANSWER

Answered 2021-Dec-23 at 20:43

Increase memory, for example with VM option -Xmx4g

Also note that parallelBenchmarkCount AUTO currently doesn't take into account that moveThreadCount is not NONE. So your benchmarks will not be accurate, because if you have 16 cores, parallelBenchmarkCount AUTO will resolve to 8. With moveThreadCount 4 (+ 1 solver thread), you'll be using 32+ cores but only have 16 cores. This probably should be reported as an issue in optaplanner's jira for parallelBenchmarkCount AUTO.

Source https://stackoverflow.com/questions/70450791

QUESTION

Generic classes within Drools-WorkBench

Asked 2022-Jan-03 at 22:55

I am currently working on a project that require that the input into Drools-Workbench for validation up against, is Generic.

So in essence what should be happening is the following;

receive object from an RabbitMQ channel.
Validate object with Drools-WB.
Upload the validation results (obtained from Drools-WB) to a RabbitMQ channel.

I have the following class, wherein the input is the "generic part", and the ruleSet should specify which rulesheet should be used from the Drools-WB instance.

public class InputObject {


    private Integer primaryKey;

    private Integer sessionId;

    private Integer transactionId;

    private String ruleSet;

    private Map<String, Object> input;

    private List<ValidationResult> validationResults;
    public void addValidationResult(ValidationResult validationResult) {
        this.validationResults.add(validationResult);
    }
    // [...]
}

This is submitted to my Drools-WB instance using KieServicesClient for JAVA, using the following commands:

KieCommands commandFactory = kieServices.getCommands();
commands.add(commandFactory.newInsert(inputObject, "ValRes"));
commands.add(commandFactory.newFireAllRules());

BatchExecutionCommand batchExecutionCommand = commandFactory.newBatchExecution(commands, conf.getKieSession());

ServiceResponse<ExecutionResults> response = this.createRulesClient()
        .executeCommandsWithResults(inputObject.getRuleSet(), batchExecutionCommand);
ExecutionResults singleRes = response.getResult();

The rules are specified in .xlsx file, such that it should be possible for "non-technical" people to submit rules, "more easily". Currently the following rules are applied; Though with this configuration a null exceptions is always thrown, no matter how I assigns values to the input variable.

Besides this, I tried to simply have a new object inherit from LinkedHashMap, like so;

public class DroolsObject extends LinkedHashMap<String, Object> {


    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

Where input is simply an instance of this DroolsObject class. With this configuration, it is possible to utilize the keyword this within the Drools .xlsx sheet, like this;

But with this configuration, the rules are just executed, and no matter the value of DyrAlder the rule is not triggered.

I know that the function addValidationResult works in this context, as I've managed to receive a result, when I create a class where the variables tested on is given pr. default.

So my question is this; I've not really found anything related to generalizing the Drools class, so I hope to get some answers if I'm SOL with this approach, or if there is another way of doing this? Maybe having a HashMap that I'm sending to the Drools-WB, and then just overwriting the class, so that it can use a specific class specified in the Drools-WB repository.

Anyway, happy holidays, and thanks in advance for taking your time in answering this question!

ANSWER

Answered 2022-Jan-03 at 22:55

I was able to reproduce NullPointerException for the first example only when I inserted objects without proper initialization. For the second case, indeed, this["DyrAlder"] < $param doesn't work, but this.get("DyrAlder") < $param, this.DyrAlder < $param and even DyrAlder < $param works for me.

According to your description I complicated your rules with desired ruleSet parameter to get working POC for your requirements. Out of 10 objects being inserted, only 5 fit condition DyrAlder < 5 and only 1 fits ruseSet == "set3", thus you have the rule triggered only once.

Test 1 (InputObject)

@DroolsSession(resources = "draft/inputObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testInputObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            InputObject inputObject = new InputObject();
            inputObject.setTransactionId(i);
            inputObject.setRuleSet("set" + i);
            inputObject.setInput(ImmutableMap.of("DyrAlder", i));
            inputObject.setValidationResults(new ArrayList<>());
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

Decision table

Generated rule

package draft;
//generated from Decision Table
import draft.InputObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:InputObject(ruleSet == "set3", input["DyrAlder"] < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

Model

public class InputObject {
    private Integer primaryKey;
    private Integer sessionId;
    private Integer transactionId;
    private String ruleSet;
    private Map<String, Object> input;
    private List<ValidationResult> validationResults;
    // getters/setters

Test 2 (DroolsObject)

@DroolsSession(resources = "draft/droolsObjectExample.xlsx",
        builderProperties = "drools.dump.dir = target/dump",
        showStateTransitionPopup = true)
public class PlaygroundTest extends DroolsAssert {
    
    @RegisterExtension
    public DroolsAssert droolsAssert = this;
    
    @Test
    @TestRules(expectedCount = { "1", "Check_DyrAlder" })
    public void testDroolsObjectExample() {
        KieCommands commandFactory = KieServices.get().getCommands();
        List<Command<?>> commands = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            DroolsObject inputObject = new DroolsObject();
            inputObject.put("ruleSet", "set" + i);
            inputObject.put("DyrAlder", i);
            
            commands.add(commandFactory.newInsert(inputObject, "ValRes"));
            commands.add(commandFactory.newFireAllRules());
        }
        
        commands.forEach(c -> getSession().execute(c));
    }
}

Decision table

Generated rule

package draft;
//generated from Decision Table
import draft.DroolsObject;
import draft.ValidationResult;
// rule values at A9, header at A4
rule "Check_DyrAlder"
    when
        animal:DroolsObject(ruleSet == "set3", DyrAlder < 5)
    then
        animal.addValidationResult(new ValidationResult("HDY-08277", "message"));
end

Model

public class DroolsObject extends LinkedHashMap<String, Object> {
    public void addValidationResult(ValidationResult validationResult) {
        if (!this.containsKey("validationResult"))
            this.put("validationResult", new LinkedList<ValidationResult>());
        ((List<ValidationResult>) this.get("validationResult")).add(validationResult);
    }
}

Source https://stackoverflow.com/questions/70480906

QUESTION

drools getting error : handle not found for object is it in working memory

Asked 2021-Dec-02 at 15:24

This question is in continuation to an earlier question here so my data structure is as earlier :

public class Premium{
  private List<InsuranceType> insuranceTypes;
  // getter and setter
  }

public class InsuranceType {
  private String name;
  private String category;
  // getter and setter
}

And here is my rule thanks to @RoddyoftheFrozenPeas

rule "Example"
when
  $pcr:Premium( $insuranceTypes: insuranceTypes )
  $ins:( InsuranceType( name == "TPD" , category == "D" ) from $insuranceTypes )      
then
  modify( $ins ){ 
        setCategory("A"); 
  }     
end

However when running this rule get an exception:

java.lang.RuntimeException: Update error: handle not found for object: InsuranceType [name=TPD, category=A]. Is it in the working memory?

Is this occurring because I am checking for the same attribute and also updating it ? My use case is to replace the value so I have to check for its presence ( category = D and then set it to 'A' )

ANSWER

Answered 2021-Dec-02 at 15:24

InsuranceType is not in working memory -- Premium is. So you need to modify Premium, not insurance type.

There's really not a good way to do this. You could call update, but this will refire all rules (it's the equivalent of starting over with new data in working memory.)

then
  $ins.setCategory("A");
  update( $pcr );
end

This might cause side effects like looping or excessive rule triggers.

Alternatively you could modify the Premium by setting the List value:

then
  $ins.setCategory("A");
  modify( $pcr ){ 
    setInsuranceTypes($insuranceTypes)
  }     
end

... which is clunky but as long as we've not lost the reference to the list should do what we want.

Also, not entirely related, but the outer () are not necessary on your $ins declaration line. This is sufficient:

$ins: InsuranceType( name == "TPD" , category == "D" ) from $insuranceTypes

I think your original rule had an exists() but since you removed that predicate you don't need the parentheses either.

Source https://stackoverflow.com/questions/70193124

QUESTION

Drools - how do I compare a string value present in a Java Object which is present inside a List

Asked 2021-Nov-30 at 15:42

I am new to Drools and am having a tough time writing rules Here is my data structure :

public class Premium{
   private List<InsuranceType> insuranceTypes;
}

public class InsuranceType {
   private String name;
}

So a Premium object will contain a List of Insurance types and I need to check if any of the insurance types has a name of "TPD"

Have tried the following :

rule "rule#3"
when
    $fact:Premium($insuranceTypes : InsuranceType(name == 'TPD'))
then
    System.out.println("Error");
end

However app server fails to start with the following error:

2021-11-30 12:16:37.004 ERROR 23500 --- [           main] 
o.d.c.k.builder.impl.AbstractKieModule   : Unable to build KieBaseModel:defaultKieBase
Unable to Analyse Expression InsuranceType(name == "TPD"):
[Error: unable to resolve method using strict-mode: com.xyz.Premium.name()]
[Near : {... InsuranceType(name == "TPD") ....}]
                       ^
[Line: 29, Column: 5] : [Rule name='rule#3']
Unable to analyze expression 'InsuranceType(name == "TPD")' : [Rule name='rule#3']
Field Reader does not exist for declaration '$insuranceTypes' in '$insuranceTypes : 
InsuranceType(name == "TPD")' in the rule 'rule#3' : [Rule name='rule#3']

ANSWER

Answered 2021-Nov-30 at 15:42

I'm going to assume there's a public getName method on the InsuranceType class, and a public getInsuranceTypes method on the Premium class. If either of those isn't true, you need to add either getters or make those properties public.

Your rule was pretty close. However the problem you have is that insuranceTypes is a list but you were treating it as an object.

You have several options here, depending on your needs. However I'd go with the simplest, which is this:

rule "Example"
when
  Premium( $insuranceTypes: insuranceTypes )
  exists( InsuranceType( name == "TPD" ) from $insuranceTypes )
then
  System.out.println("Error");
end

In the first line, I get the insurance types and assign them to the variable $insuranceTypes. This variable is now the list of types.

Then in the second line, I assert that there exists at least one InsuranceType in the list that has the name "TPD".

Note that Drools also has a memberOf operator, and a contains operator, which come in useful when working with lists and other iterable collections. These are inverses of each other, eg. you'd do Example( foo memberOf $someList ) or Example( myList contains $something ).

Source https://stackoverflow.com/questions/70163217

QUESTION

How to loop through a list to check if an item is a memberOf another list

Asked 2021-Nov-25 at 08:46

I want to check if any item from a list of diagnosis codes exists in another list.

I am new to Drools and I'm still trying to decide on the best approach as the current one isn't working (the output says null when it should be returning 'true').

Java POJO

public class EligibilityDomainObject {
    
    private List<String> listOfString;  
    public List<String> getListOfString() {  
         return listOfString;  
    }  
    public void setListOfString(List<String> listOfString) {  
         this.listOfString = listOfString;  
    }  
    public void addString(String value) {  
         if (listOfString == null) {  
              listOfString = new ArrayList<String>();  
         }  
         listOfString.add(value);  
    }  
    private Boolean isComplexPhysicalHealth;
    public Boolean getIsComplexPhysicalHealth() {
        return this.isComplexPhysicalHealth;
    }

    public void setIsComplexPhysicalHealth(Boolean isComplexPhysicalHealth) {
        this.isComplexPhysicalHealth = isComplexPhysicalHealth;
    }

Drools

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject($listOfString : listOfString,
            $listOfString memberOf "F77 EOO F99" )
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

Main

    public static void main(String[] args) {
        SpringApplication.run(RulesEngineApplication.class, args);
        

        try {
            KieServices kieServices = KieServices.Factory.get();
            KieContainer kContainer = kieServices.getKieClasspathContainer();

            KieSession kSession = kContainer.newKieSession("ksession-rules");
            
            EligibilityDomainObject eligibilityDomainObject = new EligibilityDomainObject(null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null);

            eligibilityDomainObject.addString("F77");
            eligibilityDomainObject.addString("F99");
            System.out.println("List of diagnosis codes: "+ eligibilityDomainObject.getListOfString().toString());
            kSession.insert(eligibilityDomainObject);
            kSession.fireAllRules();
            System.out.println("complex phys health flag: "+ eligibilityDomainObject.getIsComplexPhysicalHealth());
            
            kSession.dispose(); 
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

output

List of diagnosis codes: [Z590, E0800]

complex phys health flag: null

expected output

List of diagnosis codes: [Z590, E0800]

complex phys health flag: true

ANSWER

Answered 2021-Nov-22 at 15:56

I was able to solve it using the 'from' keyword

rule "Problems related to social environment"
    when
        $eligibilityDomainObject:EligibilityDomainObject($listOfString : listOfString)
            value: String(value memberOf "F77 EOO F99" ) from $listOfString
    then
        $eligibilityDomainObject.setIsComplexPhysicalHealth(true);
end

Source https://stackoverflow.com/questions/70060458

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

CVE-2014-8125 HIGH

XML external entity (XXE) vulnerability in Drools and jBPM before 6.2.0 allows remote attackers to read arbitrary files or possibly have other unspecified impact via a crafted BPMN2 file.

Install drools

You can download it from GitHub, Maven.
You can use drools like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the drools component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .