org.h2.mvstore.db

类 LobStorageMap

java.lang.Object

org.h2.mvstore.db.LobStorageMap

所有已实现的接口:

LobStorageInterface

public final class LobStorageMap
extends Object
implements LobStorageInterface

This class stores LOB objects in the database, in maps. This is the back-end i.e. the server side of the LOB storage.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	LobStorageMap.BlobMeta
static class	LobStorageMap.BlobReference

构造器概要

构造器

构造器和说明
LobStorageMap(Database database)

方法概要

限定符和类型	方法和说明
void	close() Close LobStorage and release all resources
ValueLob	copyLob(ValueLob old, int tableId) Copy a lob.
ValueBlob	createBlob(InputStream in, long maxLength) Create a BLOB object.
ValueClob	createClob(Reader reader, long maxLength) Create a CLOB object.
InputStream	getInputStream(long lobId, int tableId, long byteCount) Get the input stream for the given lob
InputStream	getInputStream(long lobId, long byteCount) Get the input stream for the given lob, only called on server side of a TCP connection.
boolean	isReadOnly() Whether the storage is read-only
static MVMap<Long,byte[]>	openLobDataMap(TransactionStore txStore) Open map used to store LOB data
static MVMap<Long,LobStorageMap.BlobMeta>	openLobMap(TransactionStore txStore) Open map used to store LOB metadata
void	removeAllForTable(int tableId) Remove all LOBs for this table.
void	removeLob(ValueLob lob) Delete a LOB (from the database, if it is stored there).

从类继承的方法 java.lang.Object

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

构造器详细资料

LobStorageMap

public LobStorageMap(Database database)

方法详细资料

openLobMap

public static MVMap<Long,LobStorageMap.BlobMeta> openLobMap(TransactionStore txStore)

Open map used to store LOB metadata

参数:

txStore - containing map

返回:

MVMap instance

openLobDataMap

public static MVMap<Long,byte[]> openLobDataMap(TransactionStore txStore)

Open map used to store LOB data

参数:

txStore - containing map

返回:

MVMap instance

createBlob

public ValueBlob createBlob(InputStream in,
                            long maxLength)

从接口复制的说明: LobStorageInterface

Create a BLOB object.

指定者:

createBlob 在接口中 LobStorageInterface

参数:

in - the input stream

maxLength - the maximum length (-1 if not known)

返回:

the LOB

createClob

public ValueClob createClob(Reader reader,
                            long maxLength)

从接口复制的说明: LobStorageInterface

Create a CLOB object.

指定者:

createClob 在接口中 LobStorageInterface

参数:

reader - the reader

maxLength - the maximum length (-1 if not known)

返回:

the LOB

isReadOnly

public boolean isReadOnly()

从接口复制的说明: LobStorageInterface

Whether the storage is read-only

指定者:

isReadOnly 在接口中 LobStorageInterface

返回:

true if yes

copyLob

public ValueLob copyLob(ValueLob old,
                        int tableId)

从接口复制的说明: LobStorageInterface

Copy a lob.

指定者:

copyLob 在接口中 LobStorageInterface

参数:

old - the old lob

tableId - the new table id

返回:

the new lob

getInputStream

public InputStream getInputStream(long lobId,
                                  long byteCount)
                           throws IOException

从接口复制的说明: LobStorageInterface

Get the input stream for the given lob, only called on server side of a TCP connection.

指定者:

getInputStream 在接口中 LobStorageInterface

参数:

lobId - the lob id

byteCount - the number of bytes to read, or -1 if not known

返回:

the stream

抛出:

IOException - on failure

getInputStream

public InputStream getInputStream(long lobId,
                                  int tableId,
                                  long byteCount)
                           throws IOException

从接口复制的说明: LobStorageInterface

Get the input stream for the given lob

指定者:

getInputStream 在接口中 LobStorageInterface

参数:

lobId - the lob id

tableId - the able id

byteCount - the number of bytes to read, or -1 if not known

返回:

the stream

抛出:

IOException - on failure

removeAllForTable

public void removeAllForTable(int tableId)

从接口复制的说明: LobStorageInterface

Remove all LOBs for this table.

指定者:

removeAllForTable 在接口中 LobStorageInterface

参数:

tableId - the table id

removeLob

public void removeLob(ValueLob lob)

从接口复制的说明: LobStorageInterface

Delete a LOB (from the database, if it is stored there).

指定者:

removeLob 在接口中 LobStorageInterface

参数:

lob - the lob

close

public void close()

从接口复制的说明: LobStorageInterface

Close LobStorage and release all resources

指定者:

close 在接口中 LobStorageInterface