Package com.orientechnologies.orient.core.storage.index.versionmap

Class OVersionPositionMapV0

java.lang.Object

com.orientechnologies.common.concur.resource.OSharedResourceAbstract

com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurableComponent

com.orientechnologies.orient.core.storage.index.versionmap.OVersionPositionMap

com.orientechnologies.orient.core.storage.index.versionmap.OVersionPositionMapV0

public final class OVersionPositionMapV0
extends OVersionPositionMap

The version position map in version 0 stores a version of type int for all change operations on the `OAbstractPaginatedStorage` storage. It creates one file with extension `vpm` (i.e. w/o meta data) and expected number of elements OBaseIndexEngine.DEFAULT_VERSION_ARRAY_SIZE.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	PAGE_SIZE

Fields inherited from class com.orientechnologies.orient.core.storage.index.versionmap.OVersionPositionMap

DEF_EXTENSION, DEFAULT_VERSION_ARRAY_SIZE, MAGIC_SAFETY_FILL_FACTOR, MAX_CONCURRENT_DISTRIBUTED_TRANSACTIONS

Fields inherited from class com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurableComponent

atomicOperationsManager, readCache, storage, writeCache

Fields inherited from class com.orientechnologies.common.concur.resource.OSharedResourceAbstract

lock

Constructor Summary

Constructors

Constructor	Description
OVersionPositionMapV0(OAbstractPaginatedStorage storage, String name, String lockName, String extension)

Method Summary

Modifier and Type	Method	Description
void	create(OAtomicOperation atomicOperation)
void	delete(OAtomicOperation atomicOperation)
int	getKeyHash(Object key)
int	getVersion(int hash)
void	open()
void	updateVersion(int hash)

Methods inherited from class com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurableComponent

addFile, addPage, calculateInsideComponentOperation, deleteFile, executeInsideComponentOperation, getExtension, getFilledUpTo, getFullName, getLockName, getName, isFileExists, loadOrAddPageForWrite, loadPageForRead, loadPageForWrite, openFile, releasePageFromRead, releasePageFromWrite, setName, truncateFile, tryExecuteInsideComponentOperation

Methods inherited from class com.orientechnologies.common.concur.resource.OSharedResourceAbstract

acquireExclusiveLock, acquireSharedLock, releaseExclusiveLock, releaseSharedLock

Methods inherited from class java.lang.Object

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

Field Details

PAGE_SIZE

public static final int PAGE_SIZE

Constructor Details

OVersionPositionMapV0

public OVersionPositionMapV0(OAbstractPaginatedStorage storage,
 String name,
 String lockName,
 String extension)

Method Details

create

public void create(OAtomicOperation atomicOperation)

Specified by:

create in class OVersionPositionMap

delete

public void delete(OAtomicOperation atomicOperation)

Specified by:

delete in class OVersionPositionMap

open

public void open()
          throws IOException

Specified by:

open in class OVersionPositionMap

Throws:

IOException

updateVersion

public void updateVersion(int hash)

Specified by:

updateVersion in class OVersionPositionMap

getVersion

public int getVersion(int hash)

Specified by:

getVersion in class OVersionPositionMap

getKeyHash

public int getKeyHash(Object key)

Specified by:

getKeyHash in class OVersionPositionMap