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

Class ListIndex<Key,Value>

java.lang.Object

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

All Implemented Interfaces:

Index<Key,Value>

Direct Known Subclasses:

PListImpl

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

Field Summary

Fields

Modifier and Type	Field	Description
protected long	headPageId
protected AtomicBoolean	loaded
static final long	NOT_SET
protected PageFile	pageFile
protected long	tailPageId

Constructor Summary

Constructors

Constructor	Description
ListIndex()
ListIndex(PageFile pageFile, long headPageId)
ListIndex(PageFile pageFile, Page page)

Method Summary

Modifier and Type	Method	Description
Value	add(Transaction tx, Key key, Value value)
Value	addFirst(Transaction tx, Key key, Value value)
void	clear(Transaction tx)	clear the index
boolean	containsKey(Transaction tx, Key key)
ListNode<Key,Value>	createNode(Transaction tx)
Value	get(Transaction tx, Key key)
Map.Entry<Key,Value>	getFirst(Transaction tx)
protected ListNode<Key,Value>	getHead(Transaction tx)
long	getHeadPageId()
Marshaller<Key>	getKeyMarshaller()
Map.Entry<Key,Value>	getLast(Transaction tx)
PageFile	getPageFile()
protected ListNode<Key,Value>	getTail(Transaction tx)
long	getTailPageId()
Marshaller<Value>	getValueMarshaller()
boolean	isEmpty(Transaction tx)
boolean	isTransient()
Iterator<Map.Entry<Key,Value>>	iterator(Transaction tx)
Iterator<Map.Entry<Key,Value>>	iterator(Transaction tx, long initialPosition)
Iterator<ListNode<Key,Value>>	listNodeIterator(Transaction tx)
void	load(Transaction tx)	load indexes
protected void	onLoad(ListNode<Key,Value> node, Transaction tx)
void	onRemove(Map.Entry<Key,Value> removed)
Value	put(Transaction tx, Key key, Value value)	Update the value of the item with the given key in the list if ot exists, otherwise it appends the value to the end of the list.
Value	remove(Transaction tx, Key key)	remove the index key
void	setHeadPageId(long headPageId)
void	setKeyMarshaller(Marshaller<Key> keyMarshaller)	Set the marshaller for key objects
void	setPageFile(PageFile pageFile)
void	setTailPageId(long tailPageId)
void	setValueMarshaller(Marshaller<Value> valueMarshaller)	Set the marshaller for key objects
long	size()
void	storeNode(Transaction tx, ListNode<Key,Value> node, boolean overflow)
void	unload(Transaction tx)	unload indexes

Methods inherited from class java.lang.Object

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

Field Details

NOT_SET

public static final long NOT_SET

See Also:

• Constant Field Values

pageFile

protected PageFile pageFile

headPageId

protected long headPageId

tailPageId

protected long tailPageId

loaded

protected AtomicBoolean loaded

Constructor Details

ListIndex

public ListIndex()

ListIndex

public ListIndex(PageFile pageFile,
 long headPageId)

ListIndex

public ListIndex(PageFile pageFile,
 Page page)

Method Details

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

onLoad

protected void onLoad(ListNode<Key,Value> node,
 Transaction tx)

unload

public void unload(Transaction tx)

Description copied from interface: Index

unload indexes

Specified by:

unload in interface Index<Key,Value>

getHead

protected ListNode<Key,Value> getHead(Transaction tx)
                               throws IOException

Throws:

IOException

getTail

protected ListNode<Key,Value> getTail(Transaction tx)
                               throws IOException

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

get

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

Specified by:

get in interface Index<Key,Value>

Returns:

the entry

Throws:

IOException

put

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

Update the value of the item with the given key in the list if ot exists, otherwise it appends the value to the end of the list.

Specified by:

put in interface Index<Key,Value>

Returns:

the old value contained in the list if one exists or null.

Throws:

IOException

add

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

Throws:

IOException

addFirst

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

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

onRemove

public void onRemove(Map.Entry<Key,Value> removed)

isTransient

public boolean isTransient()

Specified by:

isTransient in interface Index<Key,Value>

Returns:

true if the index is transient

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

listNodeIterator

public Iterator<ListNode<Key,Value>> listNodeIterator(Transaction tx)
                                               throws IOException

Throws:

IOException

isEmpty

public boolean isEmpty(Transaction tx)
                throws IOException

Throws:

IOException

iterator

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

Specified by:

iterator in interface Index<Key,Value>

Returns:

Throws:

IOException

iterator

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

Throws:

IOException

getFirst

public Map.Entry<Key,Value> getFirst(Transaction tx)
                              throws IOException

Throws:

IOException

getLast

public Map.Entry<Key,Value> getLast(Transaction tx)
                             throws IOException

Throws:

IOException

createNode

public ListNode<Key,Value> createNode(Transaction tx)
                               throws IOException

Throws:

IOException

storeNode

public void storeNode(Transaction tx,
 ListNode<Key,Value> node,
 boolean overflow)
               throws IOException

Throws:

IOException

getPageFile

public PageFile getPageFile()

setPageFile

public void setPageFile(PageFile pageFile)

getHeadPageId

public long getHeadPageId()

setHeadPageId

public void setHeadPageId(long headPageId)

getKeyMarshaller

public Marshaller<Key> getKeyMarshaller()

setKeyMarshaller

public void setKeyMarshaller(Marshaller<Key> keyMarshaller)

Description copied from interface: Index

Set the marshaller for key objects

Specified by:

setKeyMarshaller in interface Index<Key,Value>

getValueMarshaller

public Marshaller<Value> getValueMarshaller()

setValueMarshaller

public void setValueMarshaller(Marshaller<Value> valueMarshaller)

Description copied from interface: Index

Set the marshaller for key objects

Specified by:

setValueMarshaller in interface Index<Key,Value>

setTailPageId

public void setTailPageId(long tailPageId)

getTailPageId

public long getTailPageId()

size

public long size()