com.db4o.internal.freespace

Class AbstractFreespaceManager

java.lang.Object

com.db4o.internal.freespace.AbstractFreespaceManager

All Implemented Interfaces:

FreespaceManager

Direct Known Subclasses:

BTreeFreespaceManager, FreespaceManagerIx, InMemoryFreespaceManager

public abstract class AbstractFreespaceManager
extends java.lang.Object
implements FreespaceManager

Field Summary

Fields

Modifier and Type	Field and Description
protected Procedure4<Slot>	_slotFreedCallback
static byte	FM_BTREE
static byte	FM_DEBUG
static byte	FM_DEFAULT
static byte	FM_IX
static byte	FM_LEGACY_RAM
static byte	FM_RAM
static int	REMAINDER_SIZE_LIMIT

Constructor Summary

Constructors

Constructor and Description
AbstractFreespaceManager(Procedure4<Slot> slotFreedCallback, int discardLimit, int remainderSizeLimit)

Method Summary

Methods

Modifier and Type	Method and Description
static byte	checkType(byte systemType)
static AbstractFreespaceManager	createNew(LocalObjectContainer file)
static AbstractFreespaceManager	createNew(LocalObjectContainer file, byte systemType)
void	debugCheckIntegrity()
protected int	discardLimit()
static int	initSlot(LocalObjectContainer file)
static void	migrate(FreespaceManager oldFM, FreespaceManager newFM)
void	migrateTo(FreespaceManager fm)
static boolean	migrationRequired(byte systemType)
void	slotFreed(Slot slot)
protected boolean	splitRemainder(int length)
int	totalFreespace()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.db4o.internal.freespace.FreespaceManager

allocateSafeSlot, allocateSlot, allocateTransactionLogSlot, beginCommit, commit, endCommit, free, freeSafeSlot, freeSelf, isStarted, listener, read, slotCount, start, systemType, traverse, write

Field Detail

FM_DEBUG

public static final byte FM_DEBUG

See Also:

Constant Field Values

FM_DEFAULT

public static final byte FM_DEFAULT

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Constant Field Values

FM_LEGACY_RAM

public static final byte FM_LEGACY_RAM

See Also:

Constant Field Values

FM_RAM

public static final byte FM_RAM

See Also:

Constant Field Values

FM_IX

public static final byte FM_IX

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Constant Field Values

FM_BTREE

public static final byte FM_BTREE

See Also:

Constant Field Values

REMAINDER_SIZE_LIMIT

public static final int REMAINDER_SIZE_LIMIT

See Also:

Constant Field Values

_slotFreedCallback

protected Procedure4<Slot> _slotFreedCallback

Constructor Detail

AbstractFreespaceManager

public AbstractFreespaceManager(Procedure4<Slot> slotFreedCallback,
                        int discardLimit,
                        int remainderSizeLimit)

Method Detail

checkType

public static byte checkType(byte systemType)

createNew

public static AbstractFreespaceManager createNew(LocalObjectContainer file)

createNew

public static AbstractFreespaceManager createNew(LocalObjectContainer file,
                                 byte systemType)

initSlot

public static int initSlot(LocalObjectContainer file)

migrateTo

public void migrateTo(FreespaceManager fm)

Specified by:

migrateTo in interface FreespaceManager

totalFreespace

public int totalFreespace()

Specified by:

totalFreespace in interface FreespaceManager

discardLimit

protected int discardLimit()

splitRemainder

protected final boolean splitRemainder(int length)

migrate

public static void migrate(FreespaceManager oldFM,
           FreespaceManager newFM)

debugCheckIntegrity

public void debugCheckIntegrity()

migrationRequired

public static boolean migrationRequired(byte systemType)

slotFreed

public void slotFreed(Slot slot)

Specified by:

slotFreed in interface FreespaceManager