BESContainerStorageFile Class Reference

implementation of BESContainerStorage that represents a way to read container information from a file. More...

#include <BESContainerStorageFile.h>

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List of all members.

Public Member Functions

 BESContainerStorageFile (const string &n)
 pull container information from the specified file
virtual ~BESContainerStorageFile ()
virtual BESContainerlook_for (const string &sym_name)
 looks for the specified container in the list of containers loaded from the file.
virtual void add_container (const string &sym_name, const string &real_name, const string &type)
 adds a container with the provided information
virtual bool del_container (const string &s_name)
 removes a container with the given symbolic name
virtual bool del_containers ()
 removes all containers
virtual void show_containers (BESInfo &info)
 show information for each container in this persistent store
virtual void dump (ostream &strm) const
 dumps information about this object
virtual const string & get_name () const
 retrieve the name of this persistent store

Protected Attributes

string _my_name

Classes

struct  _container


Detailed Description

implementation of BESContainerStorage that represents a way to read container information from a file.

This impelementation of BESContainerStorage loads container information from a file. The name of the file is determined from the bes configuration file. The key is:

BES.Container.Persistence.File.<name>

where <name> is the name of this persistent store.

The format of the file is:

<symbolic_name> <real_name> <data type>

where the <symbolic_name> is the symbolic name of the container, the <real_name> represents the physical location of the data, such as a file, and the <data type> is the type of data being represented, such as netcdf, cedar, etc...

One container per line, can not span multiple lines

See also:
BESContainerStorage

BESFileContainer

BESKeys


Constructor & Destructor Documentation

BESContainerStorageFile::BESContainerStorageFile ( const string &  n  ) 

pull container information from the specified file

Constructs a BESContainerStorageFile from a file specified by a key in the bes configuration file. The key is constructed using the name of this persistent store.

BES.Container.Persistence.File.<name>

where <name> is the name of this persistent store.

The containers are then read into memory. The format of the file is as follows.

<symbolic_name> <real_name> <data type>

where the symbolic name is the symbolic name of the container, the <real_name> represents the physical location of the data, such as a file, and the <data type> is the type of data being represented, such as netcdf, cedar, etc...

One container per line, can not span multiple lines

Parameters:
n name of this persistent store
Exceptions:
BESInternalError if the file can not be opened or if there is an error in reading in the container information.
See also:
BESContainerStorage

BESFileContainer

BESInternalError

References BESKeys::get_key(), and TheBESKeys::TheKeys().

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BESContainerStorageFile::~BESContainerStorageFile (  )  [virtual]


Member Function Documentation

BESContainer * BESContainerStorageFile::look_for ( const string &  sym_name  )  [virtual]

looks for the specified container in the list of containers loaded from the file.

If a match is made with the specified symbolic name then a BESFileContainer instance is created using the the information found (real name and container type). If not found then NULL is returned.

Parameters:
sym_name name of the container to look for
Returns:
a new BESFileContainer if the sym_name is found in the file, else 0
See also:
BESFileContainer

Implements BESContainerStorage.

void BESContainerStorageFile::add_container ( const string &  sym_name,
const string &  real_name,
const string &  type 
) [virtual]

adds a container with the provided information

This method adds a container to the persistence store with the specified information. This functionality is not currently supported for file persistence.

Parameters:
sym_name symbolic name for the container
real_name real name for the container
type type of data represented by this container

Implements BESContainerStorage.

bool BESContainerStorageFile::del_container ( const string &  s_name  )  [virtual]

removes a container with the given symbolic name

This method removes a container to the persistence store with the given symbolic name. It deletes the container. The container is NOT removed from the file from which it was loaded, however.

Parameters:
s_name symbolic name for the container
Returns:
true if successfully removes container, false otherwise

Implements BESContainerStorage.

bool BESContainerStorageFile::del_containers (  )  [virtual]

removes all containers

This method removes all containers from the persistent store. The container is NOT removed from the file from which it was loaded, however.

Returns:
true if successfully removes all containers, false otherwise

Implements BESContainerStorage.

void BESContainerStorageFile::show_containers ( BESInfo info  )  [virtual]

show information for each container in this persistent store

For each container in this persistent store, add infomation about each of those containers. The information added to the information object includes a line for each container within this persistent store which includes the symbolic name, the real name, and the data type, separated by commas.

In the case of this persistent store all of the containers loaded from the file specified by the key BES.Container.Persistence.File.<store_name> is added to the information object.

Parameters:
info object to store the container and persistent store information into
See also:
BESInfo

Implements BESContainerStorage.

References BESInfo::add_tag(), BESInfo::begin_tag(), BESInfo::end_tag(), and BESContainerStorage::get_name().

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void BESContainerStorageFile::dump ( ostream &  strm  )  const [virtual]

dumps information about this object

Displays the pointer value of this instance along with information about the containers in this storage

Parameters:
strm C++ i/o stream to dump the information to

Implements BESContainerStorage.

References BESContainerStorage::get_name(), BESIndent::Indent(), BESIndent::LMarg(), and BESIndent::UnIndent().

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virtual const string& BESContainerStorage::get_name (  )  const [inline, virtual, inherited]


Member Data Documentation

string BESContainerStorage::_my_name [protected, inherited]


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

Generated on Thu Sep 11 07:58:29 2008 for OPeNDAP Back End Server (BES) by  doxygen 1.5.6