Package net.sf.basedb.util.listable

Class TransformCache

java.lang.Object

net.sf.basedb.util.listable.TransformCache

public class TransformCache
extends Object

A simple cache implementation for holding the result of source item to target item transformation.

Since:

3.16

Author:

nicklas

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	TransformCache.CacheEntry
static class	TransformCache.CacheKey

Field Summary

Fields

Modifier and Type	Field	Description
private Map<TransformCache.CacheKey,TransformCache.CacheEntry>	cache
private long	nextCleanup
private long	timeoutInMillis

Constructor Summary

Constructors

Constructor	Description
TransformCache(int timeoutInMinutes)	Creates a new cache with the specified timeout.

Method Summary

Modifier and Type	Method	Description
(package private) void	clean()
Set<Integer>	get(TransformCache.CacheKey key)	Get a cached entry if.
static TransformCache.CacheKey	getKey(String cacheRegion, Item sourceType, Item targetType, SyncFilter.SourceItemTransform transform, Set<Integer> sourceIds)
static TransformCache.CacheKey	getKey(Item sourceType, Item targetType, SyncFilter.SourceItemTransform transform, Set<Integer> sourceIds)	Get a key that is able to identify a given transformation.
void	store(TransformCache.CacheKey key, Set<Integer> targetList)	Store a new entry into the cache.

Methods inherited from class java.lang.Object

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

Field Details

cache

private final Map<TransformCache.CacheKey,TransformCache.CacheEntry> cache

timeoutInMillis

private final long timeoutInMillis

nextCleanup

private long nextCleanup

Constructor Details

TransformCache

public TransformCache(int timeoutInMinutes)

Creates a new cache with the specified timeout.

Method Details

getKey

public static TransformCache.CacheKey getKey(Item sourceType,
Item targetType,
SyncFilter.SourceItemTransform transform,
Set<Integer> sourceIds)

Get a key that is able to identify a given transformation. We need the source and target item types as well as the transformation direction and all source items ids. It is recommended that the sourceIds set is a SortedSet. If not, a new sorted set is automatically created.

getKey

public static TransformCache.CacheKey getKey(String cacheRegion,
Item sourceType,
Item targetType,
SyncFilter.SourceItemTransform transform,
Set<Integer> sourceIds)

get

public Set<Integer> get(TransformCache.CacheKey key)

Get a cached entry if. Null is returned if there is no entry or if the existing entry is too old.

store

public void store(TransformCache.CacheKey key,
Set<Integer> targetList)

Store a new entry into the cache.

clean

void clean()