org.apache.jackrabbit.oak.segment

Class CacheAccessTracker<K,V>

java.lang.Object

org.apache.jackrabbit.oak.segment.CacheAccessTracker<K,V>

All Implemented Interfaces:

Cache<K,V>

public class CacheAccessTracker<K,V>
extends Object
implements Cache<K,V>

Cache wrapper exposing the number of read accesses and the number of misses ot the underlying cache via the StatisticsProvider.

Constructor Summary

Constructors

Constructor and Description
CacheAccessTracker(@NotNull String name, @NotNull StatisticsProvider statisticsProvider, @NotNull Cache<K,V> delegate) Create a new wrapper exposing the access statistics under the given name to the passed statisticsProvider.

Method Summary

Modifier and Type	Method and Description
V	get(K key)
void	put(K key, V value) Add a mapping from key to value.
void	put(K key, V value, byte cost) Add a mapping from key to value with a given cost.

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheAccessTracker

public CacheAccessTracker(@NotNull
                          @NotNull String name,
                          @NotNull
                          @NotNull StatisticsProvider statisticsProvider,
                          @NotNull
                          @NotNull Cache<K,V> delegate)

Create a new wrapper exposing the access statistics under the given name to the passed statisticsProvider.

Parameters:

name - name under which to expose the access statistics

statisticsProvider - statistics provider where the access statistics is recorded to

delegate - the underlying, wrapped cache.

Method Detail

put

public void put(@NotNull
                K key,
                @NotNull
                V value)

Description copied from interface: Cache

Add a mapping from key to value.

Specified by:

put in interface Cache<K,V>

put

public void put(@NotNull
                K key,
                @NotNull
                V value,
                byte cost)

Description copied from interface: Cache

Add a mapping from key to value with a given cost.

Specified by:

put in interface Cache<K,V>

get

@Nullable
public V get(@NotNull
                       K key)

Specified by:

get in interface Cache<K,V>

Returns:

The mapping for key, or null if none.