org.h2.test.unit
Class TestValueMemory

java.lang.Object
  org.h2.test.TestBase
      org.h2.test.unit.TestValueMemory

All Implemented Interfaces:

DataHandler

public class TestValueMemory
extends TestBase
implements DataHandler

Tests the memory consumption of values. Values can estimate how much memory they occupy, and this tests if this estimation is correct.

Field Summary

Fields inherited from class org.h2.test.TestBase

baseDir, config, start

Constructor Summary

TestValueMemory()

Method Summary

int	allocateObjectId(boolean needFresh, boolean dataFile) Get the next object id.
void	checkPowerOff() Check if the simulated power failure occurred.
void	checkWritingAllowed() Check if writing is allowed.
int	compareTypeSave(Value a, Value b) Compare two values.
java.lang.String	createTempFile() Create a temporary file and return the file name.
void	freeUpDiskSpace() Free up disk space if possible.
int	getChecksum(byte[] data, int start, int end) Calculate the checksum for the byte array.
java.lang.String	getDatabasePath() Get the database path.
java.lang.String	getLobCompressionAlgorithm(int type) Get the compression algorithm used for large objects.
SmallLRUCache<java.lang.String,java.lang.String[]>	getLobFileListCache() Get the lob file list cache if it is used.
boolean	getLobFilesInDirectories() Checks if the lob files stored in directories.
java.lang.Object	getLobSyncObject() Get the synchronization object for lob operations.
int	getMaxLengthInplaceLob() Get the maximum length of a in-place large object
TempFileDeleter	getTempFileDeleter() Get the temp file deleter mechanism.
Trace	getTrace() Get the trace writer.
void	handleInvalidChecksum() Called when the checksum was invalid.
static void	main(java.lang.String... a) Run just this test.
FileStore	openFile(java.lang.String name, java.lang.String mode, boolean mustExist) Open a file at the given location.
void	test() This method will be called by the test framework.

Methods inherited from class org.h2.test.TestBase

assertContains, assertEqualDatabases, assertEqualReaders, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEqualStreams, assertFalse, assertFalse, assertKnownException, assertKnownException, assertResult, assertResultRowCount, assertResultSetMeta, assertResultSetOrdered, assertSingleValue, assertSmaller, assertStartsWith, assertTrue, assertTrue, crash, createCaller, createCaller, deleteDb, deleteDb, eatMemory, fail, fail, freeMemory, getClassPath, getConnection, getConnection, getMemoryUsed, getPageStoreProperty, getPassword, getPassword, getSize, getTestDir, getURL, getUser, init, init, logError, println, printTime, printTimeMemory, readString, runTest, startServerIfRequired, testCase, trace, trace, traceMemory

Methods inherited from class java.lang.Object

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

Constructor Detail

TestValueMemory

public TestValueMemory()

Method Detail

main

public static void main(java.lang.String... a)
                 throws java.lang.Exception

Run just this test.

Parameters:

a - ignored

Throws:

java.lang.Exception

test

public void test()
          throws java.sql.SQLException

Description copied from class: TestBase

This method will be called by the test framework.

Specified by:

test in class TestBase

Throws:

java.sql.SQLException

allocateObjectId

public int allocateObjectId(boolean needFresh,
                            boolean dataFile)

Description copied from interface: DataHandler

Get the next object id. This method is not required if LOB_FILES_IN_DIRECTORIES is enabled.

Specified by:

allocateObjectId in interface DataHandler

Parameters:

needFresh - if a fresh id is required

dataFile - true if the id is for the data file

Returns:

the new id

checkPowerOff

public void checkPowerOff()

Description copied from interface: DataHandler

Check if the simulated power failure occurred. This call will decrement the countdown.

Specified by:

checkPowerOff in interface DataHandler

checkWritingAllowed

public void checkWritingAllowed()

Description copied from interface: DataHandler

Check if writing is allowed.

Specified by:

checkWritingAllowed in interface DataHandler

compareTypeSave

public int compareTypeSave(Value a,
                           Value b)

Description copied from interface: DataHandler

Compare two values.

Specified by:

compareTypeSave in interface DataHandler

Parameters:

a - the first value

b - the second value

Returns:

0 for equal, 1 if a is larger than b, and -1 otherwise

createTempFile

public java.lang.String createTempFile()
                                throws java.sql.SQLException

Description copied from interface: DataHandler

Create a temporary file and return the file name.

Specified by:

createTempFile in interface DataHandler

Returns:

the file name

Throws:

java.sql.SQLException

freeUpDiskSpace

public void freeUpDiskSpace()

Description copied from interface: DataHandler

Free up disk space if possible. This method is called if more space is needed.

Specified by:

freeUpDiskSpace in interface DataHandler

getChecksum

public int getChecksum(byte[] data,
                       int start,
                       int end)

Description copied from interface: DataHandler

Calculate the checksum for the byte array.

Specified by:

getChecksum in interface DataHandler

Parameters:

data - the byte array

start - the starting offset

end - the end offset

Returns:

the checksum

getDatabasePath

public java.lang.String getDatabasePath()

Description copied from interface: DataHandler

Get the database path.

Specified by:

getDatabasePath in interface DataHandler

Returns:

the database path

getLobCompressionAlgorithm

public java.lang.String getLobCompressionAlgorithm(int type)

Description copied from interface: DataHandler

Get the compression algorithm used for large objects.

Specified by:

getLobCompressionAlgorithm in interface DataHandler

Parameters:

type - the data type (CLOB or BLOB)

Returns:

the compression algorithm, or null

getLobSyncObject

public java.lang.Object getLobSyncObject()

Description copied from interface: DataHandler

Get the synchronization object for lob operations.

Specified by:

getLobSyncObject in interface DataHandler

Returns:

the synchronization object

getMaxLengthInplaceLob

public int getMaxLengthInplaceLob()

Description copied from interface: DataHandler

Get the maximum length of a in-place large object

Specified by:

getMaxLengthInplaceLob in interface DataHandler

Returns:

the maximum size

handleInvalidChecksum

public void handleInvalidChecksum()

Description copied from interface: DataHandler

Called when the checksum was invalid.

Specified by:

handleInvalidChecksum in interface DataHandler

openFile

public FileStore openFile(java.lang.String name,
                          java.lang.String mode,
                          boolean mustExist)
                   throws java.sql.SQLException

Description copied from interface: DataHandler

Open a file at the given location.

Specified by:

openFile in interface DataHandler

Parameters:

name - the file name

mode - the mode

mustExist - whether the file must already exist

Returns:

the file

Throws:

java.sql.SQLException

getLobFilesInDirectories

public boolean getLobFilesInDirectories()

Description copied from interface: DataHandler

Checks if the lob files stored in directories.

Specified by:

getLobFilesInDirectories in interface DataHandler

Returns:

true if lob files are stored in directories.

getLobFileListCache

public SmallLRUCache<java.lang.String,java.lang.String[]> getLobFileListCache()

Description copied from interface: DataHandler

Get the lob file list cache if it is used.

Specified by:

getLobFileListCache in interface DataHandler

Returns:

the cache or null

getTempFileDeleter

public TempFileDeleter getTempFileDeleter()

Description copied from interface: DataHandler

Get the temp file deleter mechanism.

Specified by:

getTempFileDeleter in interface DataHandler

Returns:

the temp file deleter

getTrace

public Trace getTrace()

Description copied from interface: DataHandler

Get the trace writer.

Specified by:

getTrace in interface DataHandler

Returns:

the trace writer