org.apache.activemq.store.kahadb.disk.index

Class HashIndex<Key,Value>

java.lang.Object

org.apache.activemq.store.kahadb.disk.index.HashIndex<Key,Value>

All Implemented Interfaces:

Index<Key,Value>

public class HashIndex<Key,Value>
extends Object
implements Index<Key,Value>

BTree implementation

Field Summary

Fields

Modifier and Type	Field and Description
static int	CLOSED_STATE
static int	DEFAULT_BIN_CAPACITY
static int	DEFAULT_LOAD_FACTOR
static int	DEFAULT_MAXIMUM_BIN_CAPACITY
static int	DEFAULT_MINIMUM_BIN_CAPACITY
static int	OPEN_STATE

Constructor Summary

Constructors

Constructor and Description
HashIndex(PageFile pageFile, long pageId) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
void	clear(Transaction tx) clear the index
boolean	containsKey(Transaction tx, Key key)
Value	get(Transaction tx, Key key)
int	getActiveBins()
int	getBinCapacity()
long	getBinPageId()
int	getBinsActive()
Marshaller<Key>	getKeyMarshaller()
int	getLoadFactor()
PageFile	getPageFile()
Marshaller<Value>	getValueMarshaller()
boolean	isTransient()
Iterator<Map.Entry<Key,Value>>	iterator(Transaction tx)
void	load(Transaction tx) load indexes
Value	put(Transaction tx, Key key, Value value) store the key, item
Value	remove(Transaction tx, Key key) remove the index key
void	setBinCapacity(int binCapacity)
void	setKeyMarshaller(Marshaller<Key> marshaller) Set the marshaller for key objects
void	setLoadFactor(int loadFactor)
int	setMaximumBinCapacity()
void	setMaximumBinCapacity(int maximumCapacity)
void	setValueMarshaller(Marshaller<Value> valueMarshaller) Set the marshaller for value objects
int	size(Transaction tx)
void	store(Transaction tx, org.apache.activemq.store.kahadb.disk.index.HashBin<Key,Value> bin)
String	toString()
void	unload(Transaction tx) unload indexes

Methods inherited from class java.lang.Object

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

Field Detail

CLOSED_STATE

public static final int CLOSED_STATE

See Also:

Constant Field Values

OPEN_STATE

public static final int OPEN_STATE

See Also:

Constant Field Values

DEFAULT_BIN_CAPACITY

public static final int DEFAULT_BIN_CAPACITY

DEFAULT_MAXIMUM_BIN_CAPACITY

public static final int DEFAULT_MAXIMUM_BIN_CAPACITY

DEFAULT_MINIMUM_BIN_CAPACITY

public static final int DEFAULT_MINIMUM_BIN_CAPACITY

DEFAULT_LOAD_FACTOR

public static final int DEFAULT_LOAD_FACTOR

Constructor Detail

HashIndex

public HashIndex(PageFile pageFile,
         long pageId)
          throws IOException

Constructor

Parameters:

directory -

name -

indexManager -

numberOfBins -

Throws:

IOException

Method Detail

load

public void load(Transaction tx)
          throws IOException

Description copied from interface: Index

load indexes

Specified by:

load in interface Index<Key,Value>

Throws:

IOException

unload

public void unload(Transaction tx)
            throws IOException

Description copied from interface: Index

unload indexes

Specified by:

unload in interface Index<Key,Value>

Throws:

IOException

get

public Value get(Transaction tx,
        Key key)
          throws IOException

Specified by:

get in interface Index<Key,Value>

Returns:

the entry

Throws:

IOException

containsKey

public boolean containsKey(Transaction tx,
                  Key key)
                    throws IOException

Specified by:

containsKey in interface Index<Key,Value>

Returns:

true if it contains the key

Throws:

IOException

put

public Value put(Transaction tx,
        Key key,
        Value value)
          throws IOException

Description copied from interface: Index

store the key, item

Specified by:

put in interface Index<Key,Value>

Throws:

IOException

remove

public Value remove(Transaction tx,
           Key key)
             throws IOException

Description copied from interface: Index

remove the index key

Specified by:

remove in interface Index<Key,Value>

Returns:

StoreEntry removed

Throws:

IOException

clear

public void clear(Transaction tx)
           throws IOException

Description copied from interface: Index

clear the index

Specified by:

clear in interface Index<Key,Value>

Throws:

IOException

iterator

public Iterator<Map.Entry<Key,Value>> iterator(Transaction tx)
                                        throws IOException,
                                               UnsupportedOperationException

Specified by:

iterator in interface Index<Key,Value>

Returns:

Throws:

IOException

UnsupportedOperationException

toString

public String toString()

Overrides:

toString in class Object

store

public void store(Transaction tx,
         org.apache.activemq.store.kahadb.disk.index.HashBin<Key,Value> bin)
           throws IOException

Throws:

IOException

getKeyMarshaller

public Marshaller<Key> getKeyMarshaller()

setKeyMarshaller

public void setKeyMarshaller(Marshaller<Key> marshaller)

Set the marshaller for key objects

Specified by:

setKeyMarshaller in interface Index<Key,Value>

Parameters:

marshaller -

getValueMarshaller

public Marshaller<Value> getValueMarshaller()

setValueMarshaller

public void setValueMarshaller(Marshaller<Value> valueMarshaller)

Set the marshaller for value objects

Specified by:

setValueMarshaller in interface Index<Key,Value>

Parameters:

marshaller -

getBinCapacity

public int getBinCapacity()

Returns:

number of bins in the index

setBinCapacity

public void setBinCapacity(int binCapacity)

Parameters:

binCapacity -

isTransient

public boolean isTransient()

Specified by:

isTransient in interface Index<Key,Value>

Returns:

true if the index is transient

getLoadFactor

public int getLoadFactor()

Returns:

the loadFactor

setLoadFactor

public void setLoadFactor(int loadFactor)

Parameters:

loadFactor - the loadFactor to set

setMaximumBinCapacity

public int setMaximumBinCapacity()

Returns:

the maximumCapacity

setMaximumBinCapacity

public void setMaximumBinCapacity(int maximumCapacity)

Parameters:

maximumCapacity - the maximumCapacity to set

size

public int size(Transaction tx)

getActiveBins

public int getActiveBins()

getBinPageId

public long getBinPageId()

getPageFile

public PageFile getPageFile()

getBinsActive

public int getBinsActive()