org.mapdb

Class DB.HTreeMapMaker

java.lang.Object

org.mapdb.DB.HTreeMapMaker

Enclosing class:

DB

public class DB.HTreeMapMaker
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	counter
protected long	expire
protected long	expireAccess
protected long	expireMaxSize
protected long	expireStoreSize
protected Hasher<?>	hasher
protected Serializer<?>	keySerializer
protected java.lang.String	name
protected Fun.Function1<?,?>	valueCreator
protected Serializer<?>	valueSerializer

Constructor Summary

Constructors

Constructor and Description
HTreeMapMaker(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
DB.HTreeMapMaker	counterEnable() by default collection does not have counter, without counter updates are faster, but entire collection needs to be traversed to count items.
DB.HTreeMapMaker	expireAfterAccess(long interval) Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, the most recent replacement of its value, or its last access.
DB.HTreeMapMaker	expireAfterAccess(long interval, java.util.concurrent.TimeUnit timeUnit) Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, the most recent replacement of its value, or its last access.
DB.HTreeMapMaker	expireAfterWrite(long interval) Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, or the most recent replacement of its value.
DB.HTreeMapMaker	expireAfterWrite(long interval, java.util.concurrent.TimeUnit timeUnit) Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, or the most recent replacement of its value.
DB.HTreeMapMaker	expireMaxSize(long maxSize) maximal number of entries in this map.
DB.HTreeMapMaker	expireStoreSize(double maxStoreSize)
DB.HTreeMapMaker	hasher(Hasher<?> hasher)
DB.HTreeMapMaker	keySerializer(Serializer<?> keySerializer) keySerializer used to convert keys into/from binary form.
<K,V> HTreeMap<K,V>	make()
<K,V> HTreeMap<K,V>	makeOrGet()
DB.HTreeMapMaker	valueCreator(Fun.Function1<?,?> valueCreator) If value is not found, HTreeMap can fetch and insert default value.
DB.HTreeMapMaker	valueSerializer(Serializer<?> valueSerializer) valueSerializer used to convert values into/from binary form.

Methods inherited from class java.lang.Object

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

Field Detail

name

protected final java.lang.String name

counter

protected boolean counter

keySerializer

protected Serializer<?> keySerializer

valueSerializer

protected Serializer<?> valueSerializer

expireMaxSize

protected long expireMaxSize

expire

protected long expire

expireAccess

protected long expireAccess

expireStoreSize

protected long expireStoreSize

hasher

protected Hasher<?> hasher

valueCreator

protected Fun.Function1<?,?> valueCreator

Constructor Detail

HTreeMapMaker

public HTreeMapMaker(java.lang.String name)

Method Detail

counterEnable

public DB.HTreeMapMaker counterEnable()

by default collection does not have counter, without counter updates are faster, but entire collection needs to be traversed to count items.

keySerializer

public DB.HTreeMapMaker keySerializer(Serializer<?> keySerializer)

keySerializer used to convert keys into/from binary form.

valueSerializer

public DB.HTreeMapMaker valueSerializer(Serializer<?> valueSerializer)

valueSerializer used to convert values into/from binary form.

expireMaxSize

public DB.HTreeMapMaker expireMaxSize(long maxSize)

maximal number of entries in this map. Less used entries will be expired and removed to make collection smaller

expireAfterWrite

public DB.HTreeMapMaker expireAfterWrite(long interval,
                                         java.util.concurrent.TimeUnit timeUnit)

Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, or the most recent replacement of its value.

expireAfterWrite

public DB.HTreeMapMaker expireAfterWrite(long interval)

Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, or the most recent replacement of its value.

expireAfterAccess

public DB.HTreeMapMaker expireAfterAccess(long interval,
                                          java.util.concurrent.TimeUnit timeUnit)

Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, the most recent replacement of its value, or its last access. Access time is reset by all map read and write operations

expireAfterAccess

public DB.HTreeMapMaker expireAfterAccess(long interval)

Specifies that each entry should be automatically removed from the map once a fixed duration has elapsed after the entry's creation, the most recent replacement of its value, or its last access. Access time is reset by all map read and write operations

expireStoreSize

public DB.HTreeMapMaker expireStoreSize(double maxStoreSize)

valueCreator

public DB.HTreeMapMaker valueCreator(Fun.Function1<?,?> valueCreator)

If value is not found, HTreeMap can fetch and insert default value. `valueCreator` is used to return new value. This way `HTreeMap.get()` never returns null

hasher

public DB.HTreeMapMaker hasher(Hasher<?> hasher)

make

public <K,V> HTreeMap<K,V> make()

makeOrGet

public <K,V> HTreeMap<K,V> makeOrGet()