org.hawkular.alerts.engine.impl

Class DroolsRulesEngineImpl

java.lang.Object

org.hawkular.alerts.engine.impl.DroolsRulesEngineImpl

All Implemented Interfaces:

RulesEngine

public class DroolsRulesEngineImpl
extends Object
implements RulesEngine

An implementation of RulesEngine based on drools framework. This implementations has an approach of fixed rules based on filesystem.

Author:

Jay Shaughnessy, Lucas Ponce

Constructor Summary

Constructors

Constructor and Description
DroolsRulesEngineImpl()

Method Summary

Modifier and Type	Method and Description
void	addData(Collection<Data> data) Add to the accumulated Data to be processed the next time RulesEngine.fire() is called.
void	addData(Data data) Add to the accumulated Data to be processed the next time RulesEngine.fire() is called.
void	addFact(Object fact) Insert the provided fact into the rules engine.
void	addFacts(Collection facts) Insert the provided fact into the rules engine.
void	addGlobal(String name, Object global)
void	clear() Deletes all Facts from the rules engine.
void	fire() Fire all rules given the current set of added definitions and the currently accumulated Data.
void	fireNoData() Fire all rules given the current set of added definitions and facts.
Object	getFact(Object o)
void	removeFact(Object fact) Retrieves the FactHandle for fact and then deletes the fact from the rules engine.
void	removeFacts(Collection facts) Retrieves the FactHandles for facts and then deletes the facts from the rules engine.
void	removeFacts(Predicate<Object> factFilter) Retrieves the FactHandles for facts matching the factFilter and then deletes the facts from the rules engine.
void	removeGlobal(String name)
void	reset() Completely reset the rules engine session.
void	updateFact(Object fact) Retrieves the FactHandle for fact and then updates the fact in the rules engine.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DroolsRulesEngineImpl

public DroolsRulesEngineImpl()

Method Detail

addFact

public void addFact(Object fact)

Description copied from interface: RulesEngine

Insert the provided fact into the rules engine. This method is not appropriate for Data. For Data use RulesEngine.addData(Data).

Specified by:

addFact in interface RulesEngine

Parameters:

fact - the fact

addFacts

public void addFacts(Collection facts)

Description copied from interface: RulesEngine

Insert the provided fact into the rules engine. This method is not appropriate for Data. For Data use RulesEngine.addData(Collection).

Specified by:

addFacts in interface RulesEngine

Parameters:

facts - the facts

addData

public void addData(Data data)

Description copied from interface: RulesEngine

Add to the accumulated Data to be processed the next time RulesEngine.fire() is called. After the rules are fired on the accumulated Data it will be cleared.

Specified by:

addData in interface RulesEngine

Parameters:

data - the data

addData

public void addData(Collection<Data> data)

Description copied from interface: RulesEngine

Add to the accumulated Data to be processed the next time RulesEngine.fire() is called. After the rules are fired on the accumulated Data it will be cleared.

Specified by:

addData in interface RulesEngine

Parameters:

data - the data

addGlobal

public void addGlobal(String name,
                      Object global)

Specified by:

addGlobal in interface RulesEngine

clear

public void clear()

Description copied from interface: RulesEngine

Deletes all Facts from the rules engine.

Specified by:

clear in interface RulesEngine

fire

public void fire()

Description copied from interface: RulesEngine

Fire all rules given the current set of added definitions and the currently accumulated Data.

Specified by:

fire in interface RulesEngine

fireNoData

public void fireNoData()

Description copied from interface: RulesEngine

Fire all rules given the current set of added definitions and facts. Do not add the currently accumulated Data. This is an advanced feature and used only when Facts are manually manipulated.

Specified by:

fireNoData in interface RulesEngine

getFact

public Object getFact(Object o)

Specified by:

getFact in interface RulesEngine

Parameters:

o - the fact

Returns:

The implementation-specific Fact representing object, or null if object is not a Fact in the rules engine.

removeFact

public void removeFact(Object fact)

Description copied from interface: RulesEngine

Retrieves the FactHandle for fact and then deletes the fact from the rules engine.

Specified by:

removeFact in interface RulesEngine

Parameters:

fact - the fact

updateFact

public void updateFact(Object fact)

Description copied from interface: RulesEngine

Retrieves the FactHandle for fact and then updates the fact in the rules engine.

Specified by:

updateFact in interface RulesEngine

Parameters:

fact - the fact

removeFacts

public void removeFacts(Collection facts)

Description copied from interface: RulesEngine

Retrieves the FactHandles for facts and then deletes the facts from the rules engine.

Specified by:

removeFacts in interface RulesEngine

Parameters:

facts - the facts

removeFacts

public void removeFacts(Predicate<Object> factFilter)

Description copied from interface: RulesEngine

Retrieves the FactHandles for facts matching the factFilter and then deletes the facts from the rules engine.

Specified by:

removeFacts in interface RulesEngine

Parameters:

factFilter - the factFilter

removeGlobal

public void removeGlobal(String name)

Specified by:

removeGlobal in interface RulesEngine

reset

public void reset()

Description copied from interface: RulesEngine

Completely reset the rules engine session. Disposes of any existing session before creating a new session.

Specified by:

reset in interface RulesEngine