Package io.kcache.rocksdb

Class RocksDBCache<K,V>

java.lang.Object

io.kcache.utils.PersistentCache<K,V>

io.kcache.rocksdb.RocksDBCache<K,V>

All Implemented Interfaces:

Cache<K,V>, Closeable, AutoCloseable, Map<K,V>, SortedMap<K,V>, org.apache.kafka.common.Configurable

public class RocksDBCache<K,V>
extends PersistentCache<K,V>

A persistent key-value store based on RocksDB.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields inherited from class io.kcache.utils.PersistentCache

DELETEME_FILE_NAME, MOVEME_FILE_NAME

Constructor Summary

Constructors

Constructor	Description
RocksDBCache(String name, String parentDir, String rootDir, org.apache.kafka.common.serialization.Serde<K> keySerde, org.apache.kafka.common.serialization.Serde<V> valueSerde)
RocksDBCache(String name, String parentDir, String rootDir, org.apache.kafka.common.serialization.Serde<K> keySerde, org.apache.kafka.common.serialization.Serde<V> valueSerde, Comparator<K> comparator)
RocksDBCache(String name, String rootDir, org.apache.kafka.common.serialization.Serde<K> keySerde, org.apache.kafka.common.serialization.Serde<V> valueSerde)
RocksDBCache(String name, String rootDir, org.apache.kafka.common.serialization.Serde<K> keySerde, org.apache.kafka.common.serialization.Serde<V> valueSerde, Comparator<K> comparator)

Method Summary

Modifier and Type	Method	Description
protected KeyValueIterator<K,V>	all(boolean isDescending)
protected void	closeDB()
void	flush()
V	get(Object key)
protected void	openDB()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> entries)
protected KeyValueIterator<K,V>	range(K from, boolean fromInclusive, K to, boolean toInclusive, boolean isDescending)
V	remove(Object key)
int	size()

Methods inherited from class io.kcache.utils.PersistentCache

all, clear, close, comparator, containsKey, containsValue, dbDir, descendingCache, destroy, entrySet, firstKey, init, isEmpty, isPersistent, keySerde, keySet, lastKey, name, parentDir, putIfAbsent, range, reset, rootDir, subCache, sync, validateStoreOpen, values, valueSerde

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.kcache.Cache

configure, headMap, subMap, tailMap

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, remove, replace, replace, replaceAll

Constructor Detail

RocksDBCache

public RocksDBCache(String name,
                    String rootDir,
                    org.apache.kafka.common.serialization.Serde<K> keySerde,
                    org.apache.kafka.common.serialization.Serde<V> valueSerde)

RocksDBCache

public RocksDBCache(String name,
                    String rootDir,
                    org.apache.kafka.common.serialization.Serde<K> keySerde,
                    org.apache.kafka.common.serialization.Serde<V> valueSerde,
                    Comparator<K> comparator)

RocksDBCache

public RocksDBCache(String name,
                    String parentDir,
                    String rootDir,
                    org.apache.kafka.common.serialization.Serde<K> keySerde,
                    org.apache.kafka.common.serialization.Serde<V> valueSerde)

RocksDBCache

public RocksDBCache(String name,
                    String parentDir,
                    String rootDir,
                    org.apache.kafka.common.serialization.Serde<K> keySerde,
                    org.apache.kafka.common.serialization.Serde<V> valueSerde,
                    Comparator<K> comparator)

Method Detail

openDB

protected void openDB()

Specified by:

openDB in class PersistentCache<K,V>

size

public int size()

put

public V put(K key,
             V value)

putAll

public void putAll(Map<? extends K,? extends V> entries)

get

public V get(Object key)

remove

public V remove(Object key)

range

protected KeyValueIterator<K,V> range(K from,
                                            boolean fromInclusive,
                                            K to,
                                            boolean toInclusive,
                                            boolean isDescending)

Specified by:

range in class PersistentCache<K,V>

all

protected KeyValueIterator<K,V> all(boolean isDescending)

Specified by:

all in class PersistentCache<K,V>

flush

public void flush()

closeDB

protected void closeDB()

Specified by:

closeDB in class PersistentCache<K,V>