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public interface SessionEntryPoint
An entry-point is an abstract channel through where facts are inserted into the engine.
Drools 5 supports multiple entry-points into a single StatefulKnowledgeBase
: the
default, anonymous entry-point, as well as as many user declared entry points the application
requires.
To get a reference to an entry point, just request the session:
StatefulKnowledgeSession session = kbase.newStatelessKnowledgeSession(); ... WorkingMemoryEntryPoint entrypoint = session.getWorkingMemoryEntryPoint("my entry point");
Once a reference to an entry point is acquired, the application can insert, update and retract facts to/from that entry-point as usual:
... FactHandle factHandle = entrypoint.insert( fact ); ... entrypoint.update( factHandle, newFact ); ... entrypoint.retract( factHandle ); ...
Method Summary | ||
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void |
delete(FactHandle handle)
Retracts the fact for which the given FactHandle was assigned. |
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String |
getEntryPointId()
Returns the String Id of this entry point |
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long |
getFactCount()
Returns the total number of facts currently in this entry point |
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FactHandle |
getFactHandle(Object object)
Returns the fact handle associated with the given object. |
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getFactHandles()
Returns all FactHandle s from the current session. |
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getFactHandles(ObjectFilter filter)
Returns all FactHandle s from the current session for which the facts are accepted by
the given filter. |
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Object |
getObject(FactHandle factHandle)
Returns the object associated with the given FactHandle. |
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Collection<? extends Object> |
getObjects()
Returns all facts from the current session as a Collection. |
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Collection<? extends Object> |
getObjects(ObjectFilter filter)
Returns all facts from the current session that are accepted by the given ObjectFilter . |
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FactHandle |
insert(Object object)
Inserts a new fact into this entry point |
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void |
retract(FactHandle handle)
Deprecated. use delete(FactHandle) |
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void |
update(FactHandle handle,
Object object)
Updates the fact for which the given FactHandle was assigned with the new fact set as the second parameter in this method. |
Method Detail |
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String getEntryPointId()
FactHandle insert(Object object)
object
- the fact to be inserted
void retract(FactHandle handle)
delete(FactHandle)
handle
- the handle whose fact is to be retracted.void delete(FactHandle handle)
handle
- the handle whose fact is to be retracted.void update(FactHandle handle, Object object)
handle
- the FactHandle for the fact to be updated.object
- the new value for the fact being updated.FactHandle getFactHandle(Object object)
object
- the fact for which the fact handle will be returned.
KnowledgeBaseConfiguration
Object getObject(FactHandle factHandle)
factHandle
-
Collection<? extends Object> getObjects()
Returns all facts from the current session as a Collection.
This class is not a general-purpose Collection implementation! While this class implements the Collection interface, it intentionally violates Collection general contract, which mandates the use of the equals method when comparing objects.
Instead the approach used when comparing objects with the contains(Object) method is dependent on the WorkingMemory configuration, where it can be configured for Identity or for Equality.
Collection<? extends Object> getObjects(ObjectFilter filter)
ObjectFilter
.
filter
- the filter to be applied to the returned collection of facts.
<T extends FactHandle> Collection<T> getFactHandles()
FactHandle
s from the current session.
<T extends FactHandle> Collection<T> getFactHandles(ObjectFilter filter)
FactHandle
s from the current session for which the facts are accepted by
the given filter.
filter
- the filter to be applied to the returned collection of FactHandle
s.
long getFactCount()
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