Package org.drools.core.common

Class ConcurrentNodeMemories

java.lang.Object

org.drools.core.common.ConcurrentNodeMemories

All Implemented Interfaces:

NodeMemories

public class ConcurrentNodeMemories
extends java.lang.Object
implements NodeMemories

A concurrent implementation for the node memories interface

Constructor Summary

Constructors

Constructor	Description
ConcurrentNodeMemories(InternalRuleBase ruleBase)

Method Summary

Modifier and Type	Method	Description
void	clear()
void	clearNodeMemory(MemoryFactory node)
Memory	getNodeMemory(MemoryFactory node, ReteEvaluator reteEvaluator)	The implementation tries to delay locking as much as possible, by running some potentially unsafe operations out of the critical session.
int	length()	Returns the number of positions in this memory
Memory	peekNodeMemory(int memoryId)	Peeks at the content of the node memory for the given node ID.
void	resetAllMemories(org.kie.internal.runtime.StatefulKnowledgeSession session)

Methods inherited from class java.lang.Object

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

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

peekNodeMemory

Constructor Detail

ConcurrentNodeMemories

public ConcurrentNodeMemories(InternalRuleBase ruleBase)

Method Detail

clearNodeMemory

public void clearNodeMemory(MemoryFactory node)

Specified by:

clearNodeMemory in interface NodeMemories

clear

public void clear()

Specified by:

clear in interface NodeMemories

resetAllMemories

public void resetAllMemories(org.kie.internal.runtime.StatefulKnowledgeSession session)

Specified by:

resetAllMemories in interface NodeMemories

getNodeMemory

public Memory getNodeMemory(MemoryFactory node,
                            ReteEvaluator reteEvaluator)

The implementation tries to delay locking as much as possible, by running some potentially unsafe operations out of the critical session. In case it fails the checks, it will move into the critical sessions and re-check everything before effectively doing any change on data structures.

Specified by:

getNodeMemory in interface NodeMemories

peekNodeMemory

public Memory peekNodeMemory(int memoryId)

Description copied from interface: NodeMemories

Peeks at the content of the node memory for the given node ID. This method has no side effects, so if the given memory slot for the given node ID is null, it will return null.

Specified by:

peekNodeMemory in interface NodeMemories

Returns:

length

public int length()

Description copied from interface: NodeMemories

Returns the number of positions in this memory

Specified by:

length in interface NodeMemories

Returns: