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casa
5.7.0-16
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casa
5.7.0-16
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Memory-based table storage manager class. More...
#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 &) | |
| ~MSMBase () | |
| DataManager * | clone () const |
| Clone this object. More... | |
| String | dataManagerType () const |
| Get the type name of the data manager (i.e. More... | |
| String | dataManagerName () const |
| Get the name given to this storage manager. More... | |
| uInt | nrow () const |
| Get the nr of rows in this storage manager. More... | |
| Bool | canAddRow () const |
| Does the storage manager allow to add rows? (yes) More... | |
| Bool | canRemoveRow () const |
| Does the storage manager allow to delete rows? (yes) More... | |
| Bool | canAddColumn () const |
| Does the storage manager allow to add columns? (yes) More... | |
| 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 nbytes) |
| 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... | |
| 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... | |
Memory-based table storage manager class.
Public interface
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.
| casacore::MemoryStMan::MemoryStMan | ( | ) |
Create an Memory storage manager.
Its name will be blank.
| 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.
| casacore::MemoryStMan::~MemoryStMan | ( | ) |
1.8.5