Module com.maxmind.db

Package com.maxmind.db

Class CHMCache

java.lang.Object

com.maxmind.db.CHMCache

All Implemented Interfaces:

NodeCache

public class CHMCache
extends Object
implements NodeCache

A simplistic cache using a ConcurrentHashMap. There's no eviction policy, it just fills up until reaching the specified capacity (or close enough at least, bounds check is not atomic :)

Nested Class Summary

Nested classes/interfaces inherited from interface com.maxmind.db.NodeCache

NodeCache.Loader

Constructor Summary

Constructors

Constructor	Description
CHMCache()	Creates a new cache with the default capacity.
CHMCache(int capacity)	Creates a new cache with the specified capacity.

Method Summary

Modifier and Type	Method	Description
DecodedValue	get(CacheKey key, NodeCache.Loader loader)	This method returns the value for the key.

Methods inherited from class java.lang.Object

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

Constructor Details

CHMCache

public CHMCache()

Creates a new cache with the default capacity.

CHMCache

public CHMCache(int capacity)

Creates a new cache with the specified capacity.

Parameters:

capacity - the maximum number of elements the cache can hold before starting to evict them

Method Details

get

public DecodedValue get(CacheKey key,
 NodeCache.Loader loader)
                 throws IOException

Description copied from interface: NodeCache

This method returns the value for the key. If the key is not in the cache then the loader is called to load the value.

Specified by:

get in interface NodeCache

Parameters:

key - the key to look up

loader - the loader to use if the key is not in the cache

Returns:

the value for the key

Throws:

IOException - if there is an error loading the value