com.goldencode.p2j.persist

Class FastFindCache.ReverseLookup.Value

java.lang.Object

com.goldencode.p2j.persist.FastFindCache.ReverseLookup.Value

Enclosing class:

FastFindCache.ReverseLookup

private static class FastFindCache.ReverseLookup.Value
extends java.lang.Object

The value object in the reverse cache, which contains the information needed to invalidate all cached results associated with the RecordIdentifier keys in the reverse cache. This includes a weak reference to the canonical RecordIdentifier instance, and a linked list of nodes containing invalidation information. Each node represents a single, L3 result in the primary cache.

Field Summary

Fields

Modifier and Type	Field and Description
private FastFindCache.ReverseLookup.Node	head Head of the list; always the newest node added
private java.lang.ref.WeakReference<RecordIdentifier<java.lang.String>>	ref A weak reference to the canonical record identifier instance

Constructor Summary

Constructors

Constructor and Description
Value(RecordIdentifier<java.lang.String> recID) Constructor.

Method Summary

Modifier and Type	Method and Description
(package private) void	addNode(Cache<FastFindCache.L2Key,RecordIdentifier<java.lang.String>> l3Cache, FastFindCache.L2Key l2Key) Add a node to the linked list of invalidation nodes.
private void	invalidate(java.util.BitSet dirtyProps) Walk the linked list of nodes and invalidate any L3 cached result whose non-indexed properties intersects with the given set of dirty properties.

Methods inherited from class java.lang.Object

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

Field Detail

ref

private final java.lang.ref.WeakReference<RecordIdentifier<java.lang.String>> ref

A weak reference to the canonical record identifier instance

head

private FastFindCache.ReverseLookup.Node head

Head of the list; always the newest node added

Constructor Detail

Value

Value(RecordIdentifier<java.lang.String> recID)

Constructor.

Parameters:

recID - Record identifier. This must be the canonical instance.

Method Detail

addNode

void addNode(Cache<FastFindCache.L2Key,RecordIdentifier<java.lang.String>> l3Cache,
             FastFindCache.L2Key l2Key)

Add a node to the linked list of invalidation nodes.

Parameters:

l3Cache - The L3 cache containing a cached result for the record associated with the record identifier.

l2Key - The key used to remove a single cached result from the l3Cache upon invalidation.

invalidate

private void invalidate(java.util.BitSet dirtyProps)

Walk the linked list of nodes and invalidate any L3 cached result whose non-indexed properties intersects with the given set of dirty properties. If a result is invalidated, drop the associated node from the linked list.

Parameters:

dirtyProps - The set of properties touched by an update.