casacore::MemoryStMan Class Reference

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#include <MemoryStMan.h>

Public Member Functions
	MemoryStMan ()
	Create an Memory storage manager. More...
	MemoryStMan (const String &storageManagerName)
	Create an Memory storage manager with the given name. More...
	~MemoryStMan ()
Public Member Functions inherited from casacore::MSMBase
	MSMBase ()
	Create a memory storage manager. More...
	MSMBase (const String &storageManagerName)
	Create a memory storage manager with the given name. More...
	MSMBase (const String &storageManagerName, const Record &)
virtual	~MSMBase ()
virtual DataManager *	clone () const
	Clone this object. More...
virtual String	dataManagerType () const
	Get the type name of the data manager (i.e. More...
virtual String	dataManagerName () const
	Get the name given to this storage manager. More...
void	setHasPut ()
	Set the hasPut_p flag. More...
rownr_t	nrow () const
	Get the nr of rows in this storage manager. More...
virtual Bool	canAddRow () const
	Does the storage manager allow to add rows? (yes) More...
virtual Bool	canRemoveRow () const
	Does the storage manager allow to delete rows? (yes) More...
virtual Bool	canAddColumn () const
	Does the storage manager allow to add columns? (yes) More...
virtual Bool	canRemoveColumn () const
	Does the storage manager allow to delete columns? (yes) More...
Public Member Functions inherited from casacore::DataManager
	DataManager ()
	Default constructor. More...
virtual	~DataManager ()
void	dataManagerInfo (Record &info) const
	Add SEQNR and SPEC (the DataManagerSpec subrecord) to the info. More...
virtual Record	dataManagerSpec () const
	Return a record containing data manager specifications. More...
virtual Record	getProperties () const
	Get data manager properties that can be modified. More...
virtual void	setProperties (const Record &spec)
	Modify data manager properties given in record fields. More...
virtual Bool	isStorageManager () const
	Is the data manager a storage manager? The default is yes. More...
uInt	sequenceNr () const
	Get the (unique) sequence nr of this data manager. More...
uInt	ncolumn () const
	Get the nr of columns in this data manager (can be zero). More...
Bool	asBigEndian () const
	Have the data to be stored in big or little endian canonical format? More...
const TSMOption &	tsmOption () const
	Get the TSM option. More...
MultiFileBase *	multiFile ()
	Get the MultiFile pointer (can be 0). More...
String	keywordName (const String &keyword) const
	Compose a keyword name from the given keyword appended with the sequence number (e.g. More...
String	fileName () const
	Compose a unique filename from the table name and sequence number. More...
ByteIO::OpenOption	fileOption () const
	Get the AipsIO option of the underlying file. More...
virtual Bool	isRegular () const
	Is this a regular storage manager? It is regular if it allows addition of rows and writing data in them. More...
Table &	table () const
	Get the table this object is associated with. More...
virtual void	reopenRW ()
	Reopen the data manager for read/write access. More...
virtual Bool	canRenameColumn () const
	Does the data manager allow to rename columns? (default yes) More...
virtual void	setMaximumCacheSize (uInt nMiB)
	Set the maximum cache size (in bytes) to be used by a storage manager. More...
virtual void	showCacheStatistics (std::ostream &) const
	Show the data manager's IO statistics. More...
DataManagerColumn *	createScalarColumn (const String &columnName, int dataType, const String &dataTypeId)
	Create a column in the data manager on behalf of a table column. More...
DataManagerColumn *	createDirArrColumn (const String &columnName, int dataType, const String &dataTypeId)
	Create a direct array column. More...
DataManagerColumn *	createIndArrColumn (const String &columnName, int dataType, const String &dataTypeId)
	Create an indirect array column. More...
DataManager *	getClone () const
	Has the object already been cloned? More...
void	setClone (DataManager *clone) const
	Set the pointer to the clone. More...

Additional Inherited Members
Static Public Member Functions inherited from casacore::MSMBase
static DataManager *	makeObject (const String &dataManagerType, const Record &spec)
	Make the object from the string. More...
Static Public Member Functions inherited from casacore::DataManager
static void	registerCtor (const String &type, DataManagerCtor func)
	Register a mapping of a data manager type to its static construction function. More...
static DataManagerCtor	getCtor (const String &dataManagerType)
	Get the "constructor" of a data manager (thread-safe). More...
static Bool	isRegistered (const String &dataManagerType)
	Test if a data manager is registered (thread-safe). More...
static DataManager *	unknownDataManager (const String &dataManagerType, const Record &spec)
	Serve as default function for theirRegisterMap, which catches all unknown data manager types. More...
Static Public Attributes inherited from casacore::DataManager
static rownr_t	MAXROWNR32
	Define the highest row number that can be represented as signed 32-bit. More...
Protected Member Functions inherited from casacore::DataManager
void	decrementNcolumn ()
	Decrement number of columns (in case a column is deleted). More...
void	setEndian (Bool bigEndian)
	Tell the data manager if big or little endian format is needed. More...
void	setTsmOption (const TSMOption &tsmOption)
	Tell the data manager which TSM option to use. More...
void	setMultiFile (MultiFileBase *mfile)
	Tell the data manager that MultiFile can be used. More...
virtual Bool	hasMultiFileSupport () const
	Does the data manager support use of MultiFile? A derived class has to return True if it can use the MultiFile. More...
void	throwDataTypeOther (const String &columnName, int dataType) const
	Throw an exception in case data type is TpOther, because the storage managers (and maybe other data managers) do not support such columns. More...
Protected Attributes inherited from casacore::MSMBase
String	stmanName_p
	Name given by user to this storage manager. More...
rownr_t	nrrow_p
	The number of rows in the columns. More...
rownr_t	nrrowCreate_p
	The number of rows in create(). More...
PtrBlock< MSMColumn * >	colSet_p
	The assembly of all columns. More...
Bool	hasPut_p
	Has anything been put since the last flush? More...

Detailed Description

Memory-based table storage manager class

Intended use:

Public interface

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Prerequisite

• DataManager
• MSMColumn

Synopsis

MemoryStMan is a table storage manager based in memory. It holds all data in the columns in memory and deletes them when the table gets closed. It contains pointers to the underlying MSMColumn objects, which do the actual data handling.

The Memory storage manager does fully support addition and removal of rows and columns.

The primary use of this storage manager is for a memory-based table, but it can also be used for temporary columns in disk-based tables. When reopening a disk-based table, possible columns stored with MemoryStMan will be initialized to 0. An important issue is synchronizing tables containing MemoryStMan storage managers in case of concurrent access. Because its data are not stored on disk, there is no way to synchronize the data if another process changed data or added or deleted rows. If the number or rows has changed, rows will be added or deleted as needed. Row deletion will be done at the end of the table.

Definition at line 81 of file MemoryStMan.h.

Constructor & Destructor Documentation

MemoryStMan() [1/2]

casacore::MemoryStMan::MemoryStMan

(

)

Create an Memory storage manager.

Its name will be blank.

MemoryStMan() [2/2]

casacore::MemoryStMan::MemoryStMan

(

const String &

storageManagerName

)

Create an Memory storage manager with the given name.

Its name can be used later in e.g. Table::addColumn to add a column to this storage manager.

~MemoryStMan()

casacore::MemoryStMan::~MemoryStMan

(

)

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The documentation for this class was generated from the following file:

• tables/DataMan/MemoryStMan.h