org.drools.core.reteoo

Class EntryPointNode

java.lang.Object

org.drools.core.common.BaseNode

org.drools.core.reteoo.ObjectSource

org.drools.core.reteoo.EntryPointNode

All Implemented Interfaces:

Externalizable, Serializable, NetworkNode, ObjectSink, Sink

public class EntryPointNode
extends ObjectSource
implements Externalizable, ObjectSink

A node that is an entry point into the Rete network. As we move the design to support network partitions and concurrent processing of parts of the network, we also need to support multiple, independent entry points and this class represents that. It replaces the function of the Rete Node class in previous designs.

See Also:

ObjectTypeNode, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	log
protected Map<ObjectType,ObjectTypeNode>	objectTypeNodes The object type nodes under this node
protected ObjectTypeNode	queryNode

Fields inherited from class org.drools.core.reteoo.ObjectSource

declaredMask, inferredMask, sink, source

Fields inherited from class org.drools.core.common.BaseNode

associations, hashcode, id, partitionId, partitionsEnabled

Constructor Summary

Constructors

Constructor and Description
EntryPointNode()
EntryPointNode(int id, ObjectSource objectSource, BuildContext context)
EntryPointNode(int id, RuleBasePartitionId partitionId, boolean partitionsEnabled, ObjectSource objectSource, EntryPointId entryPoint)

Method Summary

Modifier and Type	Method and Description
void	addObjectSink(ObjectSink objectSink) Adds the ObjectSink so that it may receive Objects propagated from this ObjectSource.
void	assertActivation(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory)
void	assertObject(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory) This is the entry point into the network for all asserted Facts.
void	assertObject(InternalFactHandle handle, PropagationContext context, ObjectTypeConf objectTypeConf, InternalWorkingMemory workingMemory)
void	assertQuery(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory)
void	attach()
void	attach(BuildContext context) Attaches the node into the network.
void	byPassModifyToBetaNode(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, InternalWorkingMemory workingMemory)
BitMask	calculateDeclaredMask(List<String> settableProperties)
void	doDeleteObject(PropagationContext pctx, InternalWorkingMemory wm, LeftTuple leftTuple)
protected boolean	doRemove(RuleRemovalContext context, ReteooBuilder builder, InternalWorkingMemory[] workingMemories) Removes the node from teh network.
void	doRightDelete(PropagationContext pctx, InternalWorkingMemory wm, RightTuple rightTuple)
boolean	equals(Object object)
EntryPointId	getEntryPoint()
Map<ObjectType,ObjectTypeNode>	getObjectTypeNodes()
ObjectTypeNode	getQueryNode()
short	getType()
protected boolean	internalEquals(Object object)
void	modifyActivation(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory)
void	modifyObject(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, InternalWorkingMemory workingMemory)
void	modifyObject(InternalFactHandle handle, PropagationContext pctx, ObjectTypeConf objectTypeConf, InternalWorkingMemory workingMemory)
void	modifyQuery(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory)
void	propagateModify(InternalFactHandle handle, PropagationContext pctx, ObjectTypeConf objectTypeConf, InternalWorkingMemory wm)
void	propagateRetract(InternalFactHandle handle, PropagationContext context, ObjectTypeConf objectTypeConf, InternalWorkingMemory workingMemory)
void	readExternal(ObjectInput in)
boolean	removeObjectSink(ObjectSink objectSink) Removes the ObjectSink
void	retractActivation(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory)
void	retractObject(InternalFactHandle handle, PropagationContext context, ObjectTypeConf objectTypeConf, InternalWorkingMemory workingMemory) Retract a fact object from this RuleBase and the specified WorkingMemory.
void	retractQuery(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory)
String	toString()
void	updateSink(ObjectSink sink, PropagationContext context, InternalWorkingMemory workingMemory)
void	writeExternal(ObjectOutput out)

Methods inherited from class org.drools.core.reteoo.ObjectSource

getDeclaredMask, getKnowledgeBase, getObjectSinkPropagator, getObjectTypeNode, getParentObjectSource, initDeclaredMask, isInUse, networkUpdated, resetInferredMask, updateMask

Methods inherited from class org.drools.core.common.BaseNode

addAssociation, addAssociation, getAssociatedRuleSize, getAssociationsSize, getAssociationsSize, getId, getPartitionId, hashCode, isAssociatedWith, isStreamMode, remove, removeAssociation, setId, setPartitionId, setStreamMode, thisNodeEquals

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.drools.core.common.NetworkNode

getAssociatedRuleSize, getAssociationsSize, getAssociationsSize, getId, getPartitionId, isAssociatedWith, thisNodeEquals

Field Detail

log

protected static final transient org.slf4j.Logger log

objectTypeNodes

protected Map<ObjectType,ObjectTypeNode> objectTypeNodes

The object type nodes under this node

queryNode

protected ObjectTypeNode queryNode

Constructor Detail

EntryPointNode

public EntryPointNode()

EntryPointNode

public EntryPointNode(int id,
                      ObjectSource objectSource,
                      BuildContext context)

EntryPointNode

public EntryPointNode(int id,
                      RuleBasePartitionId partitionId,
                      boolean partitionsEnabled,
                      ObjectSource objectSource,
                      EntryPointId entryPoint)

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class ObjectSource

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class ObjectSource

Throws:

IOException

getType

public short getType()

Specified by:

getType in interface NetworkNode

getEntryPoint

public EntryPointId getEntryPoint()

Returns:

the entryPoint

assertQuery

public void assertQuery(InternalFactHandle factHandle,
                        PropagationContext context,
                        InternalWorkingMemory workingMemory)

retractQuery

public void retractQuery(InternalFactHandle factHandle,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

modifyQuery

public void modifyQuery(InternalFactHandle factHandle,
                        PropagationContext context,
                        InternalWorkingMemory workingMemory)

getQueryNode

public ObjectTypeNode getQueryNode()

assertActivation

public void assertActivation(InternalFactHandle factHandle,
                             PropagationContext context,
                             InternalWorkingMemory workingMemory)

retractActivation

public void retractActivation(InternalFactHandle factHandle,
                              PropagationContext context,
                              InternalWorkingMemory workingMemory)

modifyActivation

public void modifyActivation(InternalFactHandle factHandle,
                             PropagationContext context,
                             InternalWorkingMemory workingMemory)

assertObject

public void assertObject(InternalFactHandle handle,
                         PropagationContext context,
                         ObjectTypeConf objectTypeConf,
                         InternalWorkingMemory workingMemory)

modifyObject

public void modifyObject(InternalFactHandle handle,
                         PropagationContext pctx,
                         ObjectTypeConf objectTypeConf,
                         InternalWorkingMemory workingMemory)

propagateModify

public void propagateModify(InternalFactHandle handle,
                            PropagationContext pctx,
                            ObjectTypeConf objectTypeConf,
                            InternalWorkingMemory wm)

doDeleteObject

public void doDeleteObject(PropagationContext pctx,
                           InternalWorkingMemory wm,
                           LeftTuple leftTuple)

doRightDelete

public void doRightDelete(PropagationContext pctx,
                          InternalWorkingMemory wm,
                          RightTuple rightTuple)

modifyObject

public void modifyObject(InternalFactHandle factHandle,
                         ModifyPreviousTuples modifyPreviousTuples,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

Specified by:

modifyObject in interface ObjectSink

assertObject

public void assertObject(InternalFactHandle factHandle,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

This is the entry point into the network for all asserted Facts. Iterates a cache of matching ObjectTypdeNodes asserting the Fact. If the cache does not exist it first iterates and builds the cache.

Specified by:

assertObject in interface ObjectSink

Parameters:

factHandle - The FactHandle of the fact to assert

context - The PropagationContext of the WorkingMemory action

workingMemory - The working memory session.

retractObject

public void retractObject(InternalFactHandle handle,
                          PropagationContext context,
                          ObjectTypeConf objectTypeConf,
                          InternalWorkingMemory workingMemory)

Retract a fact object from this RuleBase and the specified WorkingMemory.

Parameters:

handle - The handle of the fact to retract.

workingMemory - The working memory session.

propagateRetract

public void propagateRetract(InternalFactHandle handle,
                             PropagationContext context,
                             ObjectTypeConf objectTypeConf,
                             InternalWorkingMemory workingMemory)

addObjectSink

public void addObjectSink(ObjectSink objectSink)

Adds the ObjectSink so that it may receive Objects propagated from this ObjectSource.

Overrides:

addObjectSink in class ObjectSource

Parameters:

objectSink - The ObjectSink to receive propagated Objects. Rete only accepts ObjectTypeNodes as parameters to this method, though.

removeObjectSink

public boolean removeObjectSink(ObjectSink objectSink)

Description copied from class: ObjectSource

Removes the ObjectSink

Overrides:

removeObjectSink in class ObjectSource

Parameters:

objectSink - The ObjectSink to remove

attach

public void attach()

attach

public void attach(BuildContext context)

Description copied from class: BaseNode

Attaches the node into the network. Usually to the parent ObjectSource or TupleSource

Specified by:

attach in class BaseNode

doRemove

protected boolean doRemove(RuleRemovalContext context,
                           ReteooBuilder builder,
                           InternalWorkingMemory[] workingMemories)

Description copied from class: BaseNode

Removes the node from teh network. Usually from the parent ObjectSource or TupleSource

Overrides:

doRemove in class ObjectSource

getObjectTypeNodes

public Map<ObjectType,ObjectTypeNode> getObjectTypeNodes()

equals

public boolean equals(Object object)

Overrides:

equals in class Object

internalEquals

protected boolean internalEquals(Object object)

Specified by:

internalEquals in class BaseNode

updateSink

public void updateSink(ObjectSink sink,
                       PropagationContext context,
                       InternalWorkingMemory workingMemory)

Specified by:

updateSink in class ObjectSource

toString

public String toString()

Overrides:

toString in class BaseNode

byPassModifyToBetaNode

public void byPassModifyToBetaNode(InternalFactHandle factHandle,
                                   ModifyPreviousTuples modifyPreviousTuples,
                                   PropagationContext context,
                                   InternalWorkingMemory workingMemory)

Specified by:

byPassModifyToBetaNode in interface ObjectSink

calculateDeclaredMask

public BitMask calculateDeclaredMask(List<String> settableProperties)

Specified by:

calculateDeclaredMask in class ObjectSource