org.apache.carbondata.hadoop

Class CacheAccessClient<K,V>

java.lang.Object

org.apache.carbondata.hadoop.CacheAccessClient<K,V>

public class CacheAccessClient<K,V>
extends Object

CacheClient : Class used to request the segments cache

Constructor Summary

Constructors

Constructor and Description
CacheAccessClient(org.apache.carbondata.core.cache.Cache<K,V> cache)

Method Summary

Modifier and Type	Method and Description
void	clearAccessCount(List<K> segmentList) This method will clear the access count for a given list of segments
void	close() the method is used to clear access count of the unused segments cacheable object
V	get(K key) This method will get the value for the given key.
V	getIfPresent(K key) This method will return the value for the given key.
void	invalidateAll(List<K> keys) This method will remove the cache for a given key

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheAccessClient

public CacheAccessClient(org.apache.carbondata.core.cache.Cache<K,V> cache)

Method Detail

getIfPresent

public V getIfPresent(K key)

This method will return the value for the given key. It will not check and load the data for the given key

Parameters:

key -

Returns:

get

public V get(K key)
      throws IOException

This method will get the value for the given key. If value does not exist for the given key, it will check and load the value.

Parameters:

key -

Returns:

Throws:

IOException - in case memory is not sufficient to load data into memory

close

public void close()

the method is used to clear access count of the unused segments cacheable object

invalidateAll

public void invalidateAll(List<K> keys)

This method will remove the cache for a given key

Parameters:

keys -

clearAccessCount

public void clearAccessCount(List<K> segmentList)

This method will clear the access count for a given list of segments

Parameters:

segmentList -