org.h2.mvstore.db

Class Store

java.lang.Object

org.h2.mvstore.db.Store

public final class Store
extends java.lang.Object

A store with open tables.

Constructor Summary

Constructors

Constructor and Description
Store(Database db, byte[] key) Creates the store.

Method Summary

Modifier and Type	Method and Description
void	close(int allowedCompactionTime) Close the store.
void	closeImmediately() Close the store, without persisting changes.
void	compactFile(int maxCompactTime) Compact the database file, that is, compact blocks that have a low fill rate, and move chunks next to each other.
MVTable	createTable(CreateTableData data) Create a table.
void	flush() Store all pending changes.
java.util.ArrayList<InDoubtTransaction>	getInDoubtTransactions()
java.io.InputStream	getInputStream()
static DbException	getInvalidExpressionTypeException(java.lang.String param, Typed e) Gets a SQL exception meaning the type of expression is invalid or unknown.
MVStore	getMvStore()
MVTable	getTable(java.lang.String tableName) Get MVTable by table name.
TransactionStore	getTransactionStore()
java.lang.String	nextTemporaryMapName() Get the name of the next available temporary map.
void	prepareCommit(SessionLocal session, java.lang.String transactionName) Prepare a transaction.
void	removeTable(MVTable table) Remove a table.
void	removeTemporaryMaps(java.util.BitSet objectIds) Remove all temporary maps.
void	setCacheSize(int kb) Set the maximum memory to be used by the cache.
java.util.Map<java.lang.String,java.lang.Integer>	statisticsEnd() Stop collecting statistics.
void	statisticsStart() Start collecting statistics.
void	sync() Force the changes to disk.

Methods inherited from class java.lang.Object

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

Constructor Detail

Store

public Store(Database db,
             byte[] key)

Creates the store.

Parameters:

db - the database

key - for file encryption

Method Detail

getInvalidExpressionTypeException

public static DbException getInvalidExpressionTypeException(java.lang.String param,
                                                            Typed e)

Gets a SQL exception meaning the type of expression is invalid or unknown.

Parameters:

param - the name of the parameter

e - the expression

Returns:

the exception

getMvStore

public MVStore getMvStore()

getTransactionStore

public TransactionStore getTransactionStore()

getTable

public MVTable getTable(java.lang.String tableName)

Get MVTable by table name.

Parameters:

tableName - table name

Returns:

MVTable

createTable

public MVTable createTable(CreateTableData data)

Create a table.

Parameters:

data - CreateTableData

Returns:

table created

removeTable

public void removeTable(MVTable table)

Remove a table.

Parameters:

table - the table

flush

public void flush()

Store all pending changes.

closeImmediately

public void closeImmediately()

Close the store, without persisting changes.

removeTemporaryMaps

public void removeTemporaryMaps(java.util.BitSet objectIds)

Remove all temporary maps.

Parameters:

objectIds - the ids of the objects to keep

nextTemporaryMapName

public java.lang.String nextTemporaryMapName()

Get the name of the next available temporary map.

Returns:

the map name

prepareCommit

public void prepareCommit(SessionLocal session,
                          java.lang.String transactionName)

Prepare a transaction.

Parameters:

session - the session

transactionName - the transaction name (may be null)

getInDoubtTransactions

public java.util.ArrayList<InDoubtTransaction> getInDoubtTransactions()

setCacheSize

public void setCacheSize(int kb)

Set the maximum memory to be used by the cache.

Parameters:

kb - the maximum size in KB

getInputStream

public java.io.InputStream getInputStream()

sync

public void sync()

Force the changes to disk.

compactFile

public void compactFile(int maxCompactTime)

Compact the database file, that is, compact blocks that have a low fill rate, and move chunks next to each other. This will typically shrink the database file. Changes are flushed to the file, and old chunks are overwritten.

Parameters:

maxCompactTime - the maximum time in milliseconds to compact

close

public void close(int allowedCompactionTime)

Close the store. Pending changes are persisted. If time is allocated for housekeeping, chunks with a low fill rate are compacted, and some chunks are put next to each other. If time is unlimited then full compaction is performed, which uses different algorithm - opens alternative temp store and writes all live data there, then replaces this store with a new one.

Parameters:

allowedCompactionTime - time (in milliseconds) alloted for file compaction activity, 0 means no compaction, -1 means unlimited time (full compaction)

statisticsStart

public void statisticsStart()

Start collecting statistics.

statisticsEnd

public java.util.Map<java.lang.String,java.lang.Integer> statisticsEnd()

Stop collecting statistics.

Returns:

the statistics