Quadcap Embeddable Database

com.quadcap.sql.file.Datafile Class Reference

List of all members.

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Detailed Description

This class brings together the various file-level components of the structured (SQL) database.

Author:

Stan Bailes

Definition at line 81 of file Datafile.java.

Public Member Functions
abstract void	maybeBackup () throws IOException
abstract void	readRoot () throws IOException
abstract void	createRoot (String fileName, Properties props) throws IOException
abstract void	flushRoot () throws IOException
abstract long	getNextTransId () throws IOException
abstract void	bootFromRoot (boolean restart) throws IOException
	Datafile ()
	Construct a new Datafile object, from the specified filename and mode.
void	init (String url, String fileName, Properties props) throws IOException
void	initMemoryDatabase (String url, String fileName, Properties props) throws IOException
void	initFileDatabase (String url, String fileName, Properties props) throws IOException
BlockFile	getFile ()
	Accessor for my underlying file.
String	getURL ()
	Return the JDBC URL used to connect to this database.
LockManager	getLockManager ()
	Accessor for the datbase's lock manager.
Object	getFileLock ()
	Accessor for file lock.
boolean	isReadOnly ()
	Is db read only?
Object	getObject (long ref) throws IOException
	Return the specified persistent object from the store.
long	putObject (Object obj) throws IOException
	Write a new object to the store and return its reference.
void	updateObject (long seg, Object obj) throws IOException
	Write a new version of a persistent object to the store.
void	removeObject (long ref) throws IOException
	Remove an object from the store.
BlockFile	getTempFile () throws IOException
	The temporary file can be used for storage of non-transactionally-secure data.
BlockFile	getTempFile (boolean incr) throws IOException
void	releaseTempFile ()
void	close ()
	Close the database.
final Transaction	makeTransaction (boolean writeLog) throws IOException
	Helper to create a new transaction, and optionally to write the BEGIN_TRANSACTION log entry.
void	commitTransaction (Transaction trans) throws IOException
	Commit the transaction.
void	rollbackTransaction (Transaction trans) throws IOException
	Rollback the transaction.
void	rollbackStatement (Transaction trans, int stmtId) throws IOException
	Rollback the specified statement.
void	releaseLocks (Transaction trans)
	Remove the transaction for the given connection from the 'active transactions' table.
Transaction	findTransaction (long transId) throws IOException
	Find the specified transaction.
final Log	getLog ()
	Return the log for this database.
void	finalize () throws Throwable
	If we get finalized, and haven't closed yet, then we should try.
long	getSize ()
	Return the total size of the datafile, in bytes.
void	checkpoint (boolean truncate, boolean fastSync) throws IOException
	Reset the temp file (on checkpoint).
void	checkpointHandler (LongMap activeTransactions) throws IOException
String	toString ()
	Return a displayable representation for debugging purposes.
void	doStep (Transaction t, LogEntry e) throws IOException, DatafileException
boolean	inRecovery () throws IOException
Static Public Attributes
boolean	isCaseSensitive
Protected Attributes
boolean	inMemory = false
DatafileRoot	root
String	origFileName
BlockFile	file
BlockFile	tempFile
boolean	readOnly = false
byte[]	temp = new byte[256]
Object	fileLock = new Object()
Package Functions
File	getDbRootDir ()
	Return a File representing the database root directory.
File	getScratchDir ()
	Return a File representing the database scratch/temp root directory.
final void	makeTempDirectory (Properties props) throws IOException
	Hook which allows the scratch files to be written to a separate directory.
void	clearTempFile ()
	When nothing is happening, get rid of this guy.
Static Package Functions
	[static initializer]
Package Attributes
String	fileName
File	dbRootDir
File	tempDir
String	url
Log	log
LockManager	locks = null
Properties	props
int	blockSize = BLOCK_SIZE
final ConfigNumber	cacheSize
int	CACHE_SIZE
final ConfigNumber	scratchCacheSize
int	SCRATCH_CACHE_SIZE
final ConfigString	defaultMode = ConfigString.find("qed.defaultMode", "rw")
Static Package Attributes
final int	MIN_CACHE = 32
	Minimum cache size: 256K, with 8K blocks.
final int	GOOD_CACHE = 256
	Reasonable cache size: 4MB (8K blocks).
final int	SCRATCH_CACHE_DEFAULT = 64
	Reasonable scratch cache default.
final int	BLOCK_SIZE = ConfigNumber.find("qed.blockSize", Integer.toString(8192)).intValue()
final ConfigString	caseSensitive = ConfigString.find("qed.isCaseSensitive", "true")
Private Member Functions
final void	deleteHalfBakedDir ()
Private Attributes
FileChannel	lockChannel = null
	True if we've locked the lockfile.
FileLock	lockLock = null
int	tempFileRefCount = 0

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Constructor & Destructor Documentation

com.quadcap.sql.file.Datafile.Datafile (   )

Construct a new Datafile object, from the specified filename and mode. Definition at line 239 of file Datafile.java.

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Member Function Documentation

com.quadcap.sql.file.Datafile.[static initializer] (   )  [static, package]

abstract void com.quadcap.sql.file.Datafile.bootFromRoot (  boolean  restart  )  throws IOException [pure virtual]

Referenced by com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

void com.quadcap.sql.file.Datafile.checkpoint (  boolean  truncate, boolean  fastSync )  throws IOException

Reset the temp file (on checkpoint). Definition at line 845 of file Datafile.java. References com.quadcap.sql.file.Datafile.checkpoint(), com.quadcap.sql.file.Datafile.fileLock, com.quadcap.sql.file.BlockFile.flush(), and com.quadcap.sql.file.Datafile.tempFile. Referenced by com.quadcap.sql.file.Datafile.checkpoint(), and com.quadcap.sql.file.Log1.reallyCheckpoint().

void com.quadcap.sql.file.Datafile.checkpointHandler (  LongMap  activeTransactions  )  throws IOException

Definition at line 855 of file Datafile.java. References com.quadcap.sql.file.Datafile.checkpointHandler(). Referenced by com.quadcap.sql.file.Datafile.checkpointHandler(), and com.quadcap.sql.file.Log1.reallyCheckpoint().

void com.quadcap.sql.file.Datafile.clearTempFile (   )  [package]

When nothing is happening, get rid of this guy. Who needs him, eh? Definition at line 686 of file Datafile.java. References com.quadcap.sql.file.BlockFile.close(), com.quadcap.sql.file.Datafile.dbRootDir, com.quadcap.sql.file.Datafile.inMemory, and com.quadcap.sql.file.Datafile.tempFile. Referenced by com.quadcap.sql.file.Datafile.close(), and com.quadcap.sql.file.Datafile.releaseTempFile().

void com.quadcap.sql.file.Datafile.close (   )

Close the database. Sync and close the physical file(s), delete the tempfile(s) and lockfile. Kill the database reference monitor thread. Definition at line 711 of file Datafile.java. References com.quadcap.sql.file.Log.checkpoint(), com.quadcap.sql.file.Datafile.clearTempFile(), com.quadcap.sql.file.BlockFile.close(), com.quadcap.sql.file.Log.close(), com.quadcap.sql.file.Datafile.dbRootDir, com.quadcap.sql.file.Datafile.file, com.quadcap.sql.file.Datafile.lockChannel, com.quadcap.sql.file.Datafile.lockLock, com.quadcap.sql.file.Datafile.log, com.quadcap.sql.file.Log.remove(), and com.quadcap.sql.file.Log.sync(). Referenced by com.quadcap.sql.file.Datafile.finalize().

void com.quadcap.sql.file.Datafile.commitTransaction (  Transaction  trans  )  throws IOException

Commit the transaction. Definition at line 780 of file Datafile.java. References com.quadcap.sql.file.Log.addEntry(), com.quadcap.sql.file.Datafile.commitTransaction(), com.quadcap.sql.file.Log.flushLog(), com.quadcap.sql.lock.Transaction.getTransactionId(), com.quadcap.sql.file.Datafile.log, and com.quadcap.sql.file.Datafile.releaseLocks(). Referenced by com.quadcap.sql.file.Datafile.commitTransaction().

abstract void com.quadcap.sql.file.Datafile.createRoot (  String  fileName, Properties  props )  throws IOException [pure virtual]

Referenced by com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

final void com.quadcap.sql.file.Datafile.deleteHalfBakedDir (   )  [private]

Definition at line 528 of file Datafile.java. References com.quadcap.sql.file.Datafile.dbRootDir. Referenced by com.quadcap.sql.file.Datafile.initFileDatabase().

void com.quadcap.sql.file.Datafile.doStep (  Transaction  t, LogEntry  e )  throws IOException, DatafileException

Definition at line 873 of file Datafile.java. References com.quadcap.sql.file.Log.addEntry(), com.quadcap.sql.file.Datafile.doStep(), and com.quadcap.sql.file.Datafile.log. Referenced by com.quadcap.sql.file.Datafile.doStep().

void com.quadcap.sql.file.Datafile.finalize (   )  throws Throwable

If we get finalized, and haven't closed yet, then we should try. Definition at line 830 of file Datafile.java. References com.quadcap.sql.file.Datafile.close().

Transaction com.quadcap.sql.file.Datafile.findTransaction (  long  transId  )  throws IOException

Find the specified transaction. Definition at line 817 of file Datafile.java. References com.quadcap.sql.file.Datafile.findTransaction(), and com.quadcap.sql.file.Datafile.locks. Referenced by com.quadcap.sql.file.Log1.abortOldestTransaction(), and com.quadcap.sql.file.Datafile.findTransaction().

abstract void com.quadcap.sql.file.Datafile.flushRoot (   )  throws IOException [pure virtual]

Referenced by com.quadcap.sql.file.Log1.reallyCheckpoint().

File com.quadcap.sql.file.Datafile.getDbRootDir (   )  [package]

Return a File representing the database root directory. Definition at line 546 of file Datafile.java. References com.quadcap.sql.file.Datafile.dbRootDir. Referenced by com.quadcap.sql.file.Log0.getDbRootDir(), and com.quadcap.sql.file.Logger1.init().

BlockFile com.quadcap.sql.file.Datafile.getFile (   )

Accessor for my underlying file. Definition at line 536 of file Datafile.java. References com.quadcap.sql.file.Datafile.file. Referenced by com.quadcap.sql.types.ValueBlob.getRandomAccess(), com.quadcap.sql.types.ValueBlob.init(), and com.quadcap.sql.types.ValueBlob.passivate().

Object com.quadcap.sql.file.Datafile.getFileLock (   )

Accessor for file lock. Definition at line 561 of file Datafile.java. References com.quadcap.sql.file.Datafile.fileLock. Referenced by com.quadcap.sql.types.ValueBlob.init(), com.quadcap.sql.file.Log1.init(), and com.quadcap.sql.types.ValueBlob.passivate().

LockManager com.quadcap.sql.file.Datafile.getLockManager (   )

Accessor for the datbase's lock manager. Definition at line 556 of file Datafile.java. References com.quadcap.sql.file.Datafile.locks.

final Log com.quadcap.sql.file.Datafile.getLog (   )

Return the log for this database. Definition at line 825 of file Datafile.java. References com.quadcap.sql.file.Datafile.log.

abstract long com.quadcap.sql.file.Datafile.getNextTransId (   )  throws IOException [pure virtual]

Referenced by com.quadcap.sql.file.Datafile.makeTransaction().

Object com.quadcap.sql.file.Datafile.getObject (  long  ref  )  throws IOException

Return the specified persistent object from the store. Parameters: ref  the block number of the object's root Returns: the object Exceptions: IOException  may be thrown Definition at line 574 of file Datafile.java. References com.quadcap.sql.file.Datafile.file, com.quadcap.sql.file.BlockFile.getObject(), and com.quadcap.sql.file.Datafile.getObject(). Referenced by com.quadcap.sql.file.Datafile.getObject().

File com.quadcap.sql.file.Datafile.getScratchDir (   )  [package]

Return a File representing the database scratch/temp root directory. Definition at line 551 of file Datafile.java. References com.quadcap.sql.file.Datafile.tempDir. Referenced by com.quadcap.sql.file.Log1.resetBlocks(), and com.quadcap.sql.file.Log1.restoreBlocks().

long com.quadcap.sql.file.Datafile.getSize (   )

Return the total size of the datafile, in bytes. Definition at line 838 of file Datafile.java. References com.quadcap.sql.file.Datafile.file, and com.quadcap.sql.file.BlockFile.getSize().

BlockFile com.quadcap.sql.file.Datafile.getTempFile (  boolean  incr  )  throws IOException

Definition at line 649 of file Datafile.java. References com.quadcap.sql.file.Datafile.blockSize, com.quadcap.sql.file.Datafile.fileLock, com.quadcap.sql.file.Datafile.fileName, com.quadcap.sql.file.Datafile.inMemory, com.quadcap.sql.file.Datafile.props, com.quadcap.sql.file.Datafile.SCRATCH_CACHE_SIZE, com.quadcap.sql.file.Datafile.tempDir, com.quadcap.sql.file.Datafile.tempFile, and com.quadcap.sql.file.Datafile.tempFileRefCount.

BlockFile com.quadcap.sql.file.Datafile.getTempFile (   )  throws IOException

The temporary file can be used for storage of non-transactionally-secure data. Definition at line 645 of file Datafile.java. Referenced by com.quadcap.sql.types.ValueBlob.init(), com.quadcap.sql.types.ValueBlob.passivate(), and com.quadcap.sql.file.Log1.reallyRestart().

String com.quadcap.sql.file.Datafile.getURL (   )

Return the JDBC URL used to connect to this database. Definition at line 541 of file Datafile.java. References com.quadcap.sql.file.Datafile.url.

void com.quadcap.sql.file.Datafile.init (  String  url, String  fileName, Properties  props )  throws IOException

Definition at line 242 of file Datafile.java. References com.quadcap.sql.file.Datafile.fileName, com.quadcap.sql.file.Datafile.init(), com.quadcap.sql.file.Datafile.initFileDatabase(), com.quadcap.sql.file.Datafile.initMemoryDatabase(), com.quadcap.sql.file.Datafile.inMemory, com.quadcap.sql.file.Datafile.props, and com.quadcap.sql.file.Datafile.url. Referenced by com.quadcap.sql.file.Datafile.init().

void com.quadcap.sql.file.Datafile.initFileDatabase (  String  url, String  fileName, Properties  props )  throws IOException

Definition at line 296 of file Datafile.java. References com.quadcap.sql.file.Datafile.blockSize, com.quadcap.sql.file.Datafile.bootFromRoot(), com.quadcap.sql.file.Datafile.CACHE_SIZE, com.quadcap.sql.file.Datafile.caseSensitive, com.quadcap.sql.file.Log.checkpoint(), com.quadcap.sql.file.Datafile.createRoot(), com.quadcap.sql.file.Datafile.dbRootDir, com.quadcap.sql.file.Datafile.defaultMode, com.quadcap.sql.file.Datafile.deleteHalfBakedDir(), com.quadcap.sql.file.Datafile.file, com.quadcap.sql.file.Datafile.fileName, com.quadcap.sql.file.Log.init(), com.quadcap.sql.file.Datafile.initFileDatabase(), com.quadcap.sql.file.Datafile.isCaseSensitive, com.quadcap.sql.file.Datafile.lockChannel, com.quadcap.sql.file.Datafile.lockLock, com.quadcap.sql.file.Datafile.log, com.quadcap.sql.file.Datafile.makeTempDirectory(), com.quadcap.sql.file.Datafile.props, com.quadcap.sql.file.Datafile.readOnly, com.quadcap.sql.file.Datafile.readRoot(), com.quadcap.sql.file.Log.restart(), com.quadcap.sql.file.Log.restoreBlocks(), com.quadcap.sql.file.BlockFile.revert(), com.quadcap.sql.file.Datafile.SCRATCH_CACHE_SIZE, com.quadcap.sql.file.BlockFile.setLog(), com.quadcap.sql.file.Log.start(), and com.quadcap.sql.file.Datafile.url. Referenced by com.quadcap.sql.file.Datafile.init(), and com.quadcap.sql.file.Datafile.initFileDatabase().

void com.quadcap.sql.file.Datafile.initMemoryDatabase (  String  url, String  fileName, Properties  props )  throws IOException

Definition at line 257 of file Datafile.java. References com.quadcap.sql.file.Datafile.blockSize, com.quadcap.sql.file.Datafile.bootFromRoot(), com.quadcap.sql.file.Datafile.CACHE_SIZE, com.quadcap.sql.file.Datafile.caseSensitive, com.quadcap.sql.file.Datafile.createRoot(), com.quadcap.sql.file.Datafile.file, com.quadcap.sql.file.Datafile.fileName, com.quadcap.sql.file.Log.init(), com.quadcap.sql.file.Datafile.initMemoryDatabase(), com.quadcap.sql.file.Datafile.isCaseSensitive, com.quadcap.sql.file.Datafile.log, com.quadcap.sql.file.Datafile.props, com.quadcap.sql.file.BlockFile.setLog(), and com.quadcap.sql.file.Datafile.url. Referenced by com.quadcap.sql.file.Datafile.init(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

boolean com.quadcap.sql.file.Datafile.inRecovery (   )  throws IOException

Definition at line 880 of file Datafile.java. References com.quadcap.sql.file.Log.inRecovery(), and com.quadcap.sql.file.Datafile.log.

boolean com.quadcap.sql.file.Datafile.isReadOnly (   )

Is db read only? Definition at line 566 of file Datafile.java. References com.quadcap.sql.file.Datafile.readOnly.

final void com.quadcap.sql.file.Datafile.makeTempDirectory (  Properties  props  )  throws IOException [package]

Hook which allows the scratch files to be written to a separate directory. Useful when you want to mount the data files read only Definition at line 615 of file Datafile.java. References com.quadcap.sql.file.Datafile.dbRootDir, com.quadcap.sql.file.Datafile.inMemory, com.quadcap.sql.file.Datafile.makeTempDirectory(), com.quadcap.sql.file.Datafile.props, and com.quadcap.sql.file.Datafile.tempDir. Referenced by com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.makeTempDirectory().

final Transaction com.quadcap.sql.file.Datafile.makeTransaction (  boolean  writeLog  )  throws IOException

Helper to create a new transaction, and optionally to write the BEGIN_TRANSACTION log entry. Definition at line 761 of file Datafile.java. References com.quadcap.sql.file.Log.addEntry(), com.quadcap.sql.file.Datafile.fileLock, com.quadcap.sql.file.Datafile.getNextTransId(), com.quadcap.sql.file.Datafile.locks, com.quadcap.sql.file.Datafile.log, and com.quadcap.sql.file.Datafile.makeTransaction(). Referenced by com.quadcap.sql.file.Datafile.makeTransaction(), and com.quadcap.sql.file.Log1.reallyRestart().

abstract void com.quadcap.sql.file.Datafile.maybeBackup (   )  throws IOException [pure virtual]

long com.quadcap.sql.file.Datafile.putObject (  Object  obj  )  throws IOException

Write a new object to the store and return its reference. Parameters: obj  the object Returns: the block number of the object's root Exceptions: IOException  may be thrown Definition at line 585 of file Datafile.java. References com.quadcap.sql.file.Datafile.file, com.quadcap.sql.file.BlockFile.putObject(), and com.quadcap.sql.file.Datafile.putObject(). Referenced by com.quadcap.sql.file.Datafile.putObject().

abstract void com.quadcap.sql.file.Datafile.readRoot (   )  throws IOException [pure virtual]

Referenced by com.quadcap.sql.file.Datafile.initFileDatabase().

void com.quadcap.sql.file.Datafile.releaseLocks (  Transaction  trans  )

Remove the transaction for the given connection from the 'active transactions' table. Flush the log? Definition at line 810 of file Datafile.java. References com.quadcap.sql.file.Datafile.locks, and com.quadcap.sql.file.Datafile.releaseLocks(). Referenced by com.quadcap.sql.file.Datafile.commitTransaction(), and com.quadcap.sql.file.Datafile.releaseLocks().

void com.quadcap.sql.file.Datafile.releaseTempFile (   )

Definition at line 672 of file Datafile.java. References com.quadcap.sql.file.Datafile.clearTempFile(), com.quadcap.sql.file.Datafile.fileLock, and com.quadcap.sql.file.Datafile.tempFileRefCount.

void com.quadcap.sql.file.Datafile.removeObject (  long  ref  )  throws IOException

Remove an object from the store. Parameters: ref  the block number of the object's root Exceptions: IOException  may be thrown Definition at line 606 of file Datafile.java. References com.quadcap.sql.file.Datafile.file, com.quadcap.sql.file.BlockFile.removeObject(), and com.quadcap.sql.file.Datafile.removeObject(). Referenced by com.quadcap.sql.file.Datafile.removeObject().

void com.quadcap.sql.file.Datafile.rollbackStatement (  Transaction  trans, int  stmtId )  throws IOException

Rollback the specified statement. Definition at line 800 of file Datafile.java. References com.quadcap.sql.file.Datafile.log, com.quadcap.sql.file.Log.rollbackStatement(), and com.quadcap.sql.file.Datafile.rollbackStatement(). Referenced by com.quadcap.sql.file.Datafile.rollbackStatement().

void com.quadcap.sql.file.Datafile.rollbackTransaction (  Transaction  trans  )  throws IOException

Rollback the transaction. Definition at line 790 of file Datafile.java. References com.quadcap.sql.file.Datafile.log, com.quadcap.sql.file.Log.rollbackTransaction(), and com.quadcap.sql.file.Datafile.rollbackTransaction(). Referenced by com.quadcap.sql.file.Datafile.rollbackTransaction().

String com.quadcap.sql.file.Datafile.toString (   )

Return a displayable representation for debugging purposes. Definition at line 864 of file Datafile.java. References com.quadcap.sql.file.Datafile.url. Referenced by com.quadcap.sql.file.Log1.resetBlocks(), and com.quadcap.sql.file.Log1.restoreBlocks().

void com.quadcap.sql.file.Datafile.updateObject (  long  seg, Object  obj )  throws IOException

Write a new version of a persistent object to the store. Parameters: blockNum  the address of the object's root page in the store obj  the new object value Exceptions: IOException  may be thrown Definition at line 596 of file Datafile.java. References com.quadcap.sql.file.Datafile.file, com.quadcap.sql.file.BlockFile.updateObject(), and com.quadcap.sql.file.Datafile.updateObject(). Referenced by com.quadcap.sql.file.Datafile.updateObject().

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Member Data Documentation

final int com.quadcap.sql.file.Datafile.BLOCK_SIZE = ConfigNumber.find("qed.blockSize", Integer.toString(8192)).intValue() [static, package]

Definition at line 161 of file Datafile.java.

int com.quadcap.sql.file.Datafile.blockSize = BLOCK_SIZE [package]

Definition at line 162 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.getTempFile(), com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

int com.quadcap.sql.file.Datafile.CACHE_SIZE [package]

Initial value: Math.max(MIN_CACHE, cacheSize.intValue() / BLOCK_SIZE) Definition at line 178 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

final ConfigNumber com.quadcap.sql.file.Datafile.cacheSize [package]

Initial value: ConfigNumber.find("qed.cacheSize", Integer.toString(GOOD_CACHE * BLOCK_SIZE)) Definition at line 176 of file Datafile.java.

final ConfigString com.quadcap.sql.file.Datafile.caseSensitive = ConfigString.find("qed.isCaseSensitive", "true") [static, package]

Definition at line 219 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

File com.quadcap.sql.file.Datafile.dbRootDir [package]

Definition at line 86 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.clearTempFile(), com.quadcap.sql.file.Datafile.close(), com.quadcap.sql.file.Datafile.deleteHalfBakedDir(), com.quadcap.sql.file.Datafile.getDbRootDir(), com.quadcap.sql.file.Log1.init(), com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.makeTempDirectory().

final ConfigString com.quadcap.sql.file.Datafile.defaultMode = ConfigString.find("qed.defaultMode", "rw") [package]

Definition at line 207 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.initFileDatabase().

BlockFile com.quadcap.sql.file.Datafile.file [protected]

Definition at line 92 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.close(), com.quadcap.sql.file.Datafile.getFile(), com.quadcap.sql.file.Datafile.getObject(), com.quadcap.sql.file.Datafile.getSize(), com.quadcap.sql.file.Log1.init(), com.quadcap.sql.file.Datafile.initFileDatabase(), com.quadcap.sql.file.Datafile.initMemoryDatabase(), com.quadcap.sql.file.Datafile.putObject(), com.quadcap.sql.file.Datafile.removeObject(), com.quadcap.sql.types.ValueBlob.setDatafile(), and com.quadcap.sql.file.Datafile.updateObject().

Object com.quadcap.sql.file.Datafile.fileLock = new Object() [protected]

Definition at line 120 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.checkpoint(), com.quadcap.sql.file.Datafile.getFileLock(), com.quadcap.sql.file.Datafile.getTempFile(), com.quadcap.sql.file.Datafile.makeTransaction(), and com.quadcap.sql.file.Datafile.releaseTempFile().

String com.quadcap.sql.file.Datafile.fileName [package]

Definition at line 83 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.getTempFile(), com.quadcap.sql.file.Datafile.init(), com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

final int com.quadcap.sql.file.Datafile.GOOD_CACHE = 256 [static, package]

Reasonable cache size: 4MB (8K blocks). This cache size should support a moderate load; 8-10 busy threads... Definition at line 146 of file Datafile.java.

boolean com.quadcap.sql.file.Datafile.inMemory = false [protected]

Definition at line 82 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.clearTempFile(), com.quadcap.sql.file.Datafile.getTempFile(), com.quadcap.sql.file.Datafile.init(), and com.quadcap.sql.file.Datafile.makeTempDirectory().

boolean com.quadcap.sql.file.Datafile.isCaseSensitive [static]

Initial value: caseSensitive.toString().equalsIgnoreCase("true") Definition at line 222 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.initFileDatabase(), and com.quadcap.sql.file.Datafile.initMemoryDatabase().

FileChannel com.quadcap.sql.file.Datafile.lockChannel = null [private]

True if we've locked the lockfile. Definition at line 114 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.close(), and com.quadcap.sql.file.Datafile.initFileDatabase().

FileLock com.quadcap.sql.file.Datafile.lockLock = null [private]

Definition at line 115 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.close(), and com.quadcap.sql.file.Datafile.initFileDatabase().

LockManager com.quadcap.sql.file.Datafile.locks = null [package]

Definition at line 102 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.findTransaction(), com.quadcap.sql.file.Datafile.getLockManager(), com.quadcap.sql.file.Datafile.makeTransaction(), and com.quadcap.sql.file.Datafile.releaseLocks().

Log com.quadcap.sql.file.Datafile.log [package]

Definition at line 99 of file Datafile.java. Referenced by com.quadcap.sql.file.Datafile.close(), com.quadcap.sql.file.Datafile.commitTransaction(), com.quadcap.sql.file.Datafile.doStep(), com.quadcap.sql.file.Datafile.getLog(), com.quadcap.sql.file.Datafile.initFileDatabase(), com.quadcap.sql.file.Datafile.initMemoryDatabase(), com.quadcap.sql.file.Datafile.inRecovery(), com.quadcap.sql.file.Datafile.makeTransaction(), com.quadcap.sql.file.Datafile.rollbackStatement(), and com.quadcap.sql.file.Datafile.rollbackTransaction().

final int com.quadcap.sql.file.Datafile.MIN_CACHE = 32 [static, package]

Minimum cache size: 256K, with 8K blocks. The minimum is dependent on various factors, including query type (joins need more cache, for example) and concurrency level. Simple applications which are primarily single threaded will be able to get by with 32 blocks or so. Definition at line 140 of file Datafile.java.

String com.quadcap.sql.file.Datafile.origFileName [protected]

Definition at line 89 of file Datafile.java.

Properties com.quadcap.sql.file.Datafile.