edu.illinois.cs.cogcomp.bigdata.mapdb

Class MapDB

java.lang.Object

edu.illinois.cs.cogcomp.bigdata.mapdb.MapDB

public final class MapDB
extends Object

MapDB interface, a db location hosting multiple customized disk-backed maps

Author:

cheng88

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	MapDB.DBConfig
static class	MapDB.Entries<K,V> Simple abstraction for the reverse sorting requirement for batch insertion

Constructor Summary

Constructors

Constructor and Description
MapDB()

Method Summary

Modifier and Type	Method and Description
static <K extends Comparable<K>,V> org.mapdb.BTreeMap<K,V>	batchCreate(Map<K,V> map, BTreeMapMaker maker)
static <K extends Comparable<K>,V> org.mapdb.BTreeMap<K,V>	batchCreate(MapDB.Entries<K,V> entries, BTreeMapMaker maker)
static <K extends Comparable<K>,V> org.mapdb.BTreeMap<K,V>	batchCreate(NavigableMap<K,V> map, BTreeMapMaker maker)
static <any>	newDbCollection(String loc, String name) Creates a db for a given name under location loc
static <any>	newDefaultDb(String loc, Enum<?> e) Creates a DB for some enumeration
static <any>	newDefaultDb(String loc, String name) Moderate space saving; mmap file; LRU instance cache; close on shutdown; write-through;
static <any>	SafeDefaultDb(String loc, String name)

Methods inherited from class java.lang.Object

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

Constructor Detail

MapDB

public MapDB()

Method Detail

newDefaultDb

public static <any> newDefaultDb(String loc,
                                 Enum<?> e)

Creates a DB for some enumeration

Parameters:

loc -

e -

Returns:

newDbCollection

public static <any> newDbCollection(String loc,
                                    String name)

Creates a db for a given name under location loc

Parameters:

loc -

name -

Returns:

newDefaultDb

public static <any> newDefaultDb(String loc,
                                 String name)

Moderate space saving; mmap file; LRU instance cache; close on shutdown; write-through;

Parameters:

loc -

name -

Returns:

SafeDefaultDb

public static <any> SafeDefaultDb(String loc,
                                  String name)

batchCreate

public static <K extends Comparable<K>,V> org.mapdb.BTreeMap<K,V> batchCreate(Map<K,V> map,
                                                                              BTreeMapMaker maker)

batchCreate

public static <K extends Comparable<K>,V> org.mapdb.BTreeMap<K,V> batchCreate(NavigableMap<K,V> map,
                                                                              BTreeMapMaker maker)

batchCreate

public static <K extends Comparable<K>,V> org.mapdb.BTreeMap<K,V> batchCreate(MapDB.Entries<K,V> entries,
                                                                              BTreeMapMaker maker)