org.drools.reteoo.nodes

Class ReteWindowNode

java.lang.Object

org.drools.core.common.BaseNode

org.drools.core.reteoo.ObjectSource

org.drools.core.reteoo.WindowNode

org.drools.reteoo.nodes.ReteWindowNode

All Implemented Interfaces:

Externalizable, Serializable, org.drools.core.common.MemoryFactory, org.drools.core.common.NetworkNode, org.drools.core.reteoo.ObjectSink, org.drools.core.reteoo.ObjectSinkNode, org.drools.core.reteoo.RightTupleSink, org.drools.core.reteoo.Sink

public class ReteWindowNode
extends org.drools.core.reteoo.WindowNode
implements org.drools.core.reteoo.ObjectSinkNode, org.drools.core.reteoo.RightTupleSink, org.drools.core.common.MemoryFactory

WindowNodes are nodes in the Rete network used to manage windows. They support multiple types of windows, like sliding windows, tumbling windows, etc.

This class must act as a lock-gate for all working memory actions on it and propagated down the network in this branch, as there can be concurrent threads propagating events and expiring events working on this node at the same time. It requires it to be thread safe.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReteWindowNode.ReteWindowMemory

Nested classes/interfaces inherited from class org.drools.core.reteoo.WindowNode

org.drools.core.reteoo.WindowNode.WindowMemory

Field Summary

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

behavior, epNode

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

declaredMask, inferredMask, sink, source

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

associations, id, partitionId, partitionsEnabled

Constructor Summary

Constructors

Constructor and Description
ReteWindowNode()
ReteWindowNode(int id, List<org.drools.core.spi.AlphaNodeFieldConstraint> constraints, List<org.drools.core.rule.Behavior> behaviors, org.drools.core.reteoo.ObjectSource objectSource, org.drools.core.reteoo.builder.BuildContext context) Construct a WindowNode with a unique id using the provided list of AlphaNodeFieldConstraint and the given ObjectSource.

Method Summary

Methods

Modifier and Type	Method and Description
void	assertObject(org.drools.core.common.InternalFactHandle factHandle, org.drools.core.spi.PropagationContext pctx, org.drools.core.common.InternalWorkingMemory workingMemory)
void	attach(org.drools.core.reteoo.builder.BuildContext context)
void	byPassModifyToBetaNode(org.drools.core.common.InternalFactHandle factHandle, org.drools.core.reteoo.ModifyPreviousTuples modifyPreviousTuples, org.drools.core.spi.PropagationContext context, org.drools.core.common.InternalWorkingMemory workingMemory)
org.drools.core.common.Memory	createMemory(org.drools.core.RuleBaseConfiguration config, org.drools.core.common.InternalWorkingMemory wm)
void	modifyRightTuple(org.drools.core.reteoo.RightTuple rightTuple, org.drools.core.spi.PropagationContext context, org.drools.core.common.InternalWorkingMemory workingMemory)
void	retractRightTuple(org.drools.core.reteoo.RightTuple rightTuple, org.drools.core.spi.PropagationContext pctx, org.drools.core.common.InternalWorkingMemory wm)
void	updateSink(org.drools.core.reteoo.ObjectSink sink, org.drools.core.spi.PropagationContext context, org.drools.core.common.InternalWorkingMemory wm)

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

assertRightTuple, calculateDeclaredMask, equals, getBehaviors, getConstraints, getEntryPoint, getNextObjectSinkNode, getPreviousObjectSinkNode, getRightInputOtnId, getType, hashCode, modifyObject, readExternal, setNextObjectSinkNode, setPreviousObjectSinkNode, setRightInputOtnId, toString, writeExternal

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

addObjectSink, doRemove, getDeclaredMask, getObjectTypeNode, getParentObjectSource, getSinkPropagator, initDeclaredMask, isInUse, networkUpdated, removeObjectSink, resetInferredMask, updateMask

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

addAssociation, attach, getAssociations, getId, getPartitionId, isStreamMode, remove, removeAssociation, setId, setPartitionId, setStreamMode

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.drools.core.reteoo.ObjectSinkNode

getNextObjectSinkNode, getPreviousObjectSinkNode, setNextObjectSinkNode, setPreviousObjectSinkNode

Methods inherited from interface org.drools.core.reteoo.ObjectSink

modifyObject

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

getAssociations, getId, getPartitionId, getType

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Methods inherited from interface org.drools.core.reteoo.RightTupleSink

assertRightTuple, getRightInputOtnId, getType

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

getId

Constructor Detail

ReteWindowNode

public ReteWindowNode()

ReteWindowNode

public ReteWindowNode(int id,
              List<org.drools.core.spi.AlphaNodeFieldConstraint> constraints,
              List<org.drools.core.rule.Behavior> behaviors,
              org.drools.core.reteoo.ObjectSource objectSource,
              org.drools.core.reteoo.builder.BuildContext context)

Construct a WindowNode with a unique id using the provided list of AlphaNodeFieldConstraint and the given ObjectSource.

Parameters:

id - Node's ID

constraints - Node's constraints

behaviors - list of behaviors for this window node

objectSource - Node's object source

Method Detail

attach

public void attach(org.drools.core.reteoo.builder.BuildContext context)

Overrides:

attach in class org.drools.core.reteoo.WindowNode

assertObject

public void assertObject(org.drools.core.common.InternalFactHandle factHandle,
                org.drools.core.spi.PropagationContext pctx,
                org.drools.core.common.InternalWorkingMemory workingMemory)

Specified by:

assertObject in interface org.drools.core.reteoo.ObjectSink

Overrides:

assertObject in class org.drools.core.reteoo.WindowNode

retractRightTuple

public void retractRightTuple(org.drools.core.reteoo.RightTuple rightTuple,
                     org.drools.core.spi.PropagationContext pctx,
                     org.drools.core.common.InternalWorkingMemory wm)

Specified by:

retractRightTuple in interface org.drools.core.reteoo.RightTupleSink

Overrides:

retractRightTuple in class org.drools.core.reteoo.WindowNode

modifyRightTuple

public void modifyRightTuple(org.drools.core.reteoo.RightTuple rightTuple,
                    org.drools.core.spi.PropagationContext context,
                    org.drools.core.common.InternalWorkingMemory workingMemory)

Specified by:

modifyRightTuple in interface org.drools.core.reteoo.RightTupleSink

Overrides:

modifyRightTuple in class org.drools.core.reteoo.WindowNode

byPassModifyToBetaNode

public void byPassModifyToBetaNode(org.drools.core.common.InternalFactHandle factHandle,
                          org.drools.core.reteoo.ModifyPreviousTuples modifyPreviousTuples,
                          org.drools.core.spi.PropagationContext context,
                          org.drools.core.common.InternalWorkingMemory workingMemory)

Specified by:

byPassModifyToBetaNode in interface org.drools.core.reteoo.ObjectSink

Overrides:

byPassModifyToBetaNode in class org.drools.core.reteoo.WindowNode

updateSink

public void updateSink(org.drools.core.reteoo.ObjectSink sink,
              org.drools.core.spi.PropagationContext context,
              org.drools.core.common.InternalWorkingMemory wm)

Overrides:

updateSink in class org.drools.core.reteoo.WindowNode

createMemory

public org.drools.core.common.Memory createMemory(org.drools.core.RuleBaseConfiguration config,
                                         org.drools.core.common.InternalWorkingMemory wm)

Specified by:

createMemory in interface org.drools.core.common.MemoryFactory

Overrides:

createMemory in class org.drools.core.reteoo.WindowNode