ArchiveOpener< Archive, Stream > Class Template Reference

#include <ArchiveOpener.hpp>

Collaboration diagram for ArchiveOpener< Archive, Stream >:

Public Member Functions
	ArchiveOpener (const FileFinder &rDirectory, const std::string &rFileNameBase, unsigned procId=PetscTools::GetMyRank())
Archive *	GetCommonArchive ()
	~ArchiveOpener ()

Private Attributes
std::ofstream *	mpCommonStream
std::ofstream *	mpPrivateStream
Archive *	mpCommonArchive
Archive *	mpPrivateArchive

Friends
class	TestArchivingHelperClasses

Detailed Description

template<class Archive, class Stream>
class ArchiveOpener< Archive, Stream >

A convenience class to assist with managing archives for parallel checkpointing.

When checkpointing a parallel simulation, there are two kinds of data that need to be saved: replicated (same for every process) and distributed (different on each process). We wish to write these to separate archive files. This class hides the complexity of doing so, such that all a user needs to do is create an instance of this class, call GetCommonArchive, and read from/write to the returned archive. When done, just destroy the instance (e.g. by closing the scope).

Internally the class uses ProcessSpecificArchive<Archive> to store the secondary archive.

Note also that implementations of this templated class only exist for text archives, i.e. Archive = boost::archive::text_iarchive (with Stream = std::ifstream), or Archive = boost::archive::text_oarchive (with Stream = std::ofstream) and for binary archives, i.e. Archive = boost::archive::binary_iarchive (with Stream = std::ifstream), or Archive = boost::archive::binary_oarchive (with Stream = std::ofstream).

Definition at line 63 of file ArchiveOpener.hpp.

Constructor & Destructor Documentation

ArchiveOpener()

template<class Archive , class Stream >

ArchiveOpener< Archive, Stream >::ArchiveOpener	(	const FileFinder &	rDirectory,
		const std::string &	rFileNameBase,
		unsigned	procId = PetscTools::GetMyRank()
	)

Open the archives for this process, either for reading or writing depending on the template parameter Archive.

Note that when writing, only the master process writes to the main archive. For other processes the main archive is a dummy, writing to /dev/null.

Note

Must be called collectively, i.e. by all processes!

If writing, and rDirectory is relative to CHASTE_TEST_OUTPUT, it will be created if it doesn't exist.

Parameters

rDirectory	folder containing archive files.
rFileNameBase	base name of archive files. This will be used for the main archive (for replicated data) with ".n" (where n is the process index) being appended for the secondary archive.
procId	this can be specified to read a specific secondary archive, rather than this process' default. Should not be used for writing!

~ArchiveOpener()

template<class Archive , class Stream >

ArchiveOpener< Archive, Stream >::~ArchiveOpener

(

)

Close the opened archives.

Member Function Documentation

GetCommonArchive()

template<class Archive , class Stream >

Archive * ArchiveOpener< Archive, Stream >::GetCommonArchive

(

)

Returns

the main archive for replicated data.

Referenced by CellBasedSimulationArchiver< ELEMENT_DIM, SIM, SPACE_DIM, INPUT_ARCHIVE_TYPE, OUTPUT_ARCHIVE_TYPE >::Load(), CardiacSimulationArchiver< PROBLEM_CLASS >::Migrate(), CardiacSimulationArchiver< PROBLEM_CLASS >::Save(), and CellBasedSimulationArchiver< ELEMENT_DIM, SIM, SPACE_DIM, INPUT_ARCHIVE_TYPE, OUTPUT_ARCHIVE_TYPE >::Save().

Friends And Related Symbol Documentation

TestArchivingHelperClasses

template<class Archive , class Stream >

friend class TestArchivingHelperClasses

friend

Definition at line 66 of file ArchiveOpener.hpp.

Member Data Documentation

mpCommonArchive

template<class Archive , class Stream >

Archive* ArchiveOpener< Archive, Stream >::mpCommonArchive

private

The main archive.

Definition at line 110 of file ArchiveOpener.hpp.

Referenced by ArchiveOpener< InputArchive, std::ifstream >::ArchiveOpener(), ArchiveOpener< OutputArchive, std::ofstream >::ArchiveOpener(), ArchiveOpener< InputArchive, std::ifstream >::GetCommonArchive(), and ArchiveOpener< OutputArchive, std::ofstream >::GetCommonArchive().

mpCommonStream

template<class Archive , class Stream >

std::ofstream* ArchiveOpener< Archive, Stream >::mpCommonStream

private

The file stream for the main archive.

Definition at line 104 of file ArchiveOpener.hpp.

Referenced by ArchiveOpener< InputArchive, std::ifstream >::ArchiveOpener(), and ArchiveOpener< OutputArchive, std::ofstream >::ArchiveOpener().

mpPrivateArchive

template<class Archive , class Stream >

Archive* ArchiveOpener< Archive, Stream >::mpPrivateArchive

private

The secondary archive.

Definition at line 113 of file ArchiveOpener.hpp.

Referenced by ArchiveOpener< InputArchive, std::ifstream >::ArchiveOpener(), and ArchiveOpener< OutputArchive, std::ofstream >::ArchiveOpener().

mpPrivateStream

template<class Archive , class Stream >

std::ofstream* ArchiveOpener< Archive, Stream >::mpPrivateStream

private

The file stream for the secondary archive.

Definition at line 107 of file ArchiveOpener.hpp.

Referenced by ArchiveOpener< InputArchive, std::ifstream >::ArchiveOpener(), and ArchiveOpener< OutputArchive, std::ofstream >::ArchiveOpener().

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

• global/src/checkpointing/ArchiveOpener.hpp