DcmQueryRetrieveIndexDatabaseHandle Class Reference

This class maintains database handles based on the classical "index.dat" file. More...

Inheritance diagram for DcmQueryRetrieveIndexDatabaseHandle:

List of all members.

Public Member Functions
	DcmQueryRetrieveIndexDatabaseHandle (const char *storageArea, long maxStudiesPerStorageArea, long maxBytesPerStudy, OFCondition &result)
	Constructor.
	~DcmQueryRetrieveIndexDatabaseHandle ()
	Destructor.
void	setIdentifierChecking (OFBool checkFind, OFBool checkMove)
	Configure the DB module to perform (or not perform) checking of FIND and MOVE request identifiers.
OFCondition	makeNewStoreFileName (const char *SOPClassUID, const char *SOPInstanceUID, char *newImageFileName)
	create a filename under which a DICOM object that is currently being received through a C-STORE operation can be stored.
OFCondition	storeRequest (const char *SOPClassUID, const char *SOPInstanceUID, const char *imageFileName, DcmQueryRetrieveDatabaseStatus *status, OFBool isNew=OFTrue)
	register the given DICOM object, which has been received through a C-STORE operation and stored in a file, in the database.
OFCondition	startFindRequest (const char *SOPClassUID, DcmDataset *findRequestIdentifiers, DcmQueryRetrieveDatabaseStatus *status)
	initiate FIND operation using the given SOP class UID (which identifies the query model) and DICOM dataset containing find request identifiers.
OFCondition	nextFindResponse (DcmDataset **findResponseIdentifiers, DcmQueryRetrieveDatabaseStatus *status)
	return the next available FIND response as a new DICOM dataset.
OFCondition	cancelFindRequest (DcmQueryRetrieveDatabaseStatus *status)
	cancel the ongoing FIND request, stop and reset every running operation associated with this request, delete existing temporary files.
OFCondition	startMoveRequest (const char *SOPClassUID, DcmDataset *moveRequestIdentifiers, DcmQueryRetrieveDatabaseStatus *status)
	initiate MOVE operation using the given SOP class UID (which identifies the retrieve model) and DICOM dataset containing move request identifiers.
OFCondition	nextMoveResponse (char *SOPClassUID, char *SOPInstanceUID, char *imageFileName, unsigned short *numberOfRemainingSubOperations, DcmQueryRetrieveDatabaseStatus *status)
	Constructs the information required for the next available C-MOVE sub-operation (the image SOP class UID, SOP Instance UID and an imageFileName containing the requested data).
OFCondition	cancelMoveRequest (DcmQueryRetrieveDatabaseStatus *status)
	cancel the ongoing MOVE request, stop and reset every running operation associated with this request, delete existing temporary files.
OFCondition	pruneInvalidRecords ()
	Prune invalid records from the database.
void	enableQuotaSystem (OFBool enable)
	enable/disable the DB quota system (default: enabled) which causes images to be deleted if certain boundaries (number of studies, bytes per study) are exceeded.
OFBool	findSOPInstance (const char *storeArea, const OFString &sopClassUID, const OFString &sopInstanceUID)
	search for a SOP class and SOP instance UIDs in index file.
OFCondition	deleteImageFile (char *imgFile)
	deletes the given file only if the quota mechanism is enabled.
OFCondition	DB_lock (OFBool exclusive)
	create lock on database
OFCondition	DB_unlock ()
	release lock on database
OFCondition	DB_IdxGetNext (int *idx, IdxRecord *idxRec)
	Get next Index record that is in use (i.e.
OFCondition	DB_IdxInitLoop (int *idx)
	seek to beginning of image records in index file
OFCondition	DB_IdxRead (int idx, IdxRecord *idxRec)
	read index record at given index
OFCondition	DB_GetStudyDesc (StudyDescRecord *pStudyDesc)
	get study descriptor record from start of index file
OFCondition	DB_StudyDescChange (StudyDescRecord *pStudyDesc)
	write study descriptor record to start of index file
OFCondition	DB_IdxRemove (int idx)
	deactivate index record at given index by setting an empty filename
OFCondition	instanceReviewed (int idx)
	clear the "is new" flag for the instance with the given index
const char *	getStorageArea () const
	return name of storage area
const char *	getIndexFilename () const
	return path to index file
Static Public Member Functions
static void	printIndexFile (char *storeArea)
	dump database index file to stdout.
Private Member Functions
	DcmQueryRetrieveIndexDatabaseHandle (const DcmQueryRetrieveIndexDatabaseHandle &other)
	private undefined copy constructor
DcmQueryRetrieveIndexDatabaseHandle &	operator= (const DcmQueryRetrieveIndexDatabaseHandle &other)
	private undefined assignment operator
OFCondition	removeDuplicateImage (const char *SOPInstanceUID, const char *StudyInstanceUID, StudyDescRecord *pStudyDesc, const char *newImageFileName)
int	deleteOldestStudy (StudyDescRecord *pStudyDesc)
OFCondition	deleteOldestImages (StudyDescRecord *pStudyDesc, int StudyNum, char *StudyUID, long RequiredSize)
int	matchDate (DB_SmallDcmElmt *mod, DB_SmallDcmElmt *elt)
int	matchTime (DB_SmallDcmElmt *mod, DB_SmallDcmElmt *elt)
int	matchUID (DB_SmallDcmElmt *mod, DB_SmallDcmElmt *elt)
int	matchStrings (DB_SmallDcmElmt *mod, DB_SmallDcmElmt *elt)
int	matchOther (DB_SmallDcmElmt *mod, DB_SmallDcmElmt *elt)
int	dbmatch (DB_SmallDcmElmt *mod, DB_SmallDcmElmt *elt)
void	makeResponseList (DB_Private_Handle *phandle, IdxRecord *idxRec)
int	matchStudyUIDInStudyDesc (StudyDescRecord *pStudyDesc, char *StudyUID, int maxStudiesAllowed)
OFCondition	checkupinStudyDesc (StudyDescRecord *pStudyDesc, char *StudyUID, long imageSize)
OFCondition	hierarchicalCompare (DB_Private_Handle *phandle, IdxRecord *idxRec, DB_LEVEL level, DB_LEVEL infLevel, int *match)
OFCondition	testFindRequestList (DB_ElementList *findRequestList, DB_LEVEL queryLevel, DB_LEVEL infLevel, DB_LEVEL lowestLevel)
OFCondition	testMoveRequestList (DB_ElementList *findRequestList, DB_LEVEL queryLevel, DB_LEVEL infLevel, DB_LEVEL lowestLevel)
Private Attributes
DB_Private_Handle *	handle_
	database handle
OFBool	quotaSystemEnabled
	flag indicating whether or not the quota system is enabled
OFBool	doCheckFindIdentifier
	flag indicating whether or not the check function for FIND requests is enabled
OFBool	doCheckMoveIdentifier
	flag indicating whether or not the check function for MOVE requests is enabled
OFFilenameCreator	fnamecreator
	helper object for file name creation

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Detailed Description

This class maintains database handles based on the classical "index.dat" file.

A database handle maintains a connection to a database and encapsulates database support for store, find and move/get operations.

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Constructor & Destructor Documentation

DcmQueryRetrieveIndexDatabaseHandle::DcmQueryRetrieveIndexDatabaseHandle	(	const char *	storageArea,
		long	maxStudiesPerStorageArea,
		long	maxBytesPerStudy,
		OFCondition &	result
	)

Constructor.

Creates and initializes a index file handle for the given database storage area (storageArea).

Parameters:

storageArea	name of storage area, must not be NULL
maxStudiesPerStorageArea	maximum number of studies for this storage area, needed to correctly parse the index file.
maxBytesPerStudy	maximum number of bytes per study, for quota mechanism
result	upon successful initialization of the database handle, EC_Normal is returned in this parameter, otherwise an error code is returned.

DcmQueryRetrieveIndexDatabaseHandle::~DcmQueryRetrieveIndexDatabaseHandle

(

)

Destructor.

Destroys handle, cancels any ongoing request if necessary, deletes temporary files used for C-STORE and sub-operations of C-MOVE.

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Member Function Documentation

OFCondition DcmQueryRetrieveIndexDatabaseHandle::cancelFindRequest

(

DcmQueryRetrieveDatabaseStatus *

status

)

[virtual]

cancel the ongoing FIND request, stop and reset every running operation associated with this request, delete existing temporary files.

Parameters:

status

pointer to DB status object in which a DIMSE status code suitable for use with the C-FIND-RSP message is set.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::cancelMoveRequest

(

DcmQueryRetrieveDatabaseStatus *

status

)

[virtual]

cancel the ongoing MOVE request, stop and reset every running operation associated with this request, delete existing temporary files.

Parameters:

status

pointer to DB status object in which a DIMSE status code suitable for use with the C-MOVE-RSP message is set.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::DB_GetStudyDesc

(

StudyDescRecord *

pStudyDesc

)

get study descriptor record from start of index file

Parameters:

pStudyDesc

pointer to study record descriptor structure

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::DB_IdxGetNext	(	int *	idx,
		IdxRecord *	idxRec
	)

Get next Index record that is in use (i.e.

references a non-empty a filename)

Parameters:

idx	pointer to index number, updated upon successful return
idxRec	pointer to index record structure

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::DB_IdxInitLoop

(

int *

idx

)

seek to beginning of image records in index file

Parameters:

idx	initialized to -1

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::DB_IdxRead	(	int	idx,
		IdxRecord *	idxRec
	)

read index record at given index

Parameters:

idx	index
idxRec	pointer to index record

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::DB_IdxRemove

(

int

idx

)

deactivate index record at given index by setting an empty filename

Parameters:

idx

index

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::DB_lock

(

OFBool

exclusive

)

create lock on database

Parameters:

exclusive

exclusive/shared lock flag

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::DB_StudyDescChange

(

StudyDescRecord *

pStudyDesc

)

write study descriptor record to start of index file

Parameters:

pStudyDesc

pointer to study record descriptor structure

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::deleteImageFile

(

char *

imgFile

)

deletes the given file only if the quota mechanism is enabled.

The image is not de-registered from the database by this routine.

Parameters:

imgFile

file name (path) to the file to be deleted.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

OFBool DcmQueryRetrieveIndexDatabaseHandle::findSOPInstance	(	const char *	storeArea,
		const OFString &	sopClassUID,
		const OFString &	sopInstanceUID
	)

search for a SOP class and SOP instance UIDs in index file.

Parameters:

storeArea	name of storage area, must not be NULL
sopClassUID	SOP Class UID to search for
sopInstanceUID	SOP Instance UID to search for

Returns:

OFTrue if SOP Class and SOP Instance UIDs are found. otherwise return OFFalse.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::instanceReviewed

(

int

idx

)

clear the "is new" flag for the instance with the given index

Parameters:

idx

index

Returns:

EC_Normal upon success, an error code otherwise

OFCondition DcmQueryRetrieveIndexDatabaseHandle::makeNewStoreFileName	(	const char *	SOPClassUID,
		const char *	SOPInstanceUID,
		char *	newImageFileName
	)		[virtual]

create a filename under which a DICOM object that is currently being received through a C-STORE operation can be stored.

Parameters:

SOPClassUID	SOP class UID of DICOM instance
SOPInstanceUID	SOP instance UID of DICOM instance
newImageFileName	file name is returned in this parameter. Memory must be provided by the caller and should be at least MAXPATHLEN+1 characters. The file name generated should be an absolute file name.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::nextFindResponse	(	DcmDataset **	findResponseIdentifiers,
		DcmQueryRetrieveDatabaseStatus *	status
	)		[virtual]

return the next available FIND response as a new DICOM dataset.

Parameters:

findResponseIdentifiers	DICOM dataset returned in this parameter. The caller is responsible for destroying the findResponseIdentifiers when no longer needed.
status	pointer to DB status object in which a DIMSE status code suitable for use with the C-FIND-RSP message is set. Status will be PENDING if more FIND responses will be generated or SUCCESS if no more FIND responses will be generated (SUCCESS indicates the completion of a operation), or another status code upon failure.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::nextMoveResponse	(	char *	SOPClassUID,
		char *	SOPInstanceUID,
		char *	imageFileName,
		unsigned short *	numberOfRemainingSubOperations,
		DcmQueryRetrieveDatabaseStatus *	status
	)		[virtual]

Constructs the information required for the next available C-MOVE sub-operation (the image SOP class UID, SOP Instance UID and an imageFileName containing the requested data).

Parameters:

SOPClassUID	pointer to string of at least 65 characters into which the SOP class UID for the next DICOM object to be transferred is copied.
SOPInstanceUID	pointer to string of at least 65 characters into which the SOP instance UID for the next DICOM object to be transferred is copied.
imageFileName	pointer to string of at least MAXPATHLEN+1 characters into which the file path for the next DICOM object to be transferred is copied.
numberOfRemainingSubOperations	On return, this parameter will contain the number of suboperations still remaining for the request (this number is needed by move responses with PENDING status).
status	pointer to DB status object in which a DIMSE status code suitable for use with the C-MOVE-RSP message is set. Status will be PENDING if more MOVE responses will be generated or SUCCESS if no more MOVE responses will be generated (SUCCESS indicates the completion of a operation), or another status code upon failure.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

static void DcmQueryRetrieveIndexDatabaseHandle::printIndexFile

(

char *

storeArea

)

[static]

dump database index file to stdout.

Parameters:

storeArea

name of storage area, must not be NULL

OFCondition DcmQueryRetrieveIndexDatabaseHandle::pruneInvalidRecords

(

)

[virtual]

Prune invalid records from the database.

Records referring to non-existant image files are invalid.

Implements DcmQueryRetrieveDatabaseHandle.

void DcmQueryRetrieveIndexDatabaseHandle::setIdentifierChecking	(	OFBool	checkFind,
		OFBool	checkMove
	)		[virtual]

Configure the DB module to perform (or not perform) checking of FIND and MOVE request identifiers.

Default is no checking.

Parameters:

checkFind	checking for C-FIND parameters
checkMove	checking for C-MOVE parameters

Implements DcmQueryRetrieveDatabaseHandle.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::startFindRequest	(	const char *	SOPClassUID,
		DcmDataset *	findRequestIdentifiers,
		DcmQueryRetrieveDatabaseStatus *	status
	)		[virtual]

initiate FIND operation using the given SOP class UID (which identifies the query model) and DICOM dataset containing find request identifiers.

Parameters:

SOPClassUID	SOP class UID of query service, identifies Q/R model
findRequestIdentifiers	dataset containing request identifiers (i.e., the query) The caller retains responsibility for destroying the findRequestIdentifiers when no longer needed.
status	pointer to DB status object in which a DIMSE status code suitable for use with the C-FIND-RSP message is set. Status will be PENDING if any FIND responses will be generated or SUCCESS if no FIND responses will be generated (SUCCESS indicates the completion of a operation), or another status code upon failure.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::startMoveRequest	(	const char *	SOPClassUID,
		DcmDataset *	moveRequestIdentifiers,
		DcmQueryRetrieveDatabaseStatus *	status
	)		[virtual]

initiate MOVE operation using the given SOP class UID (which identifies the retrieve model) and DICOM dataset containing move request identifiers.

Parameters:

SOPClassUID	SOP class UID of retrieve service, identifies Q/R model
moveRequestIdentifiers	dataset containing request identifiers (i.e., the query) The caller retains responsibility for destroying the moveRequestIdentifiers when no longer needed.
status	pointer to DB status object in which a DIMSE status code suitable for use with the C-MOVE-RSP message is set. Status will be PENDING if any MOVE responses will be generated or SUCCESS if no MOVE responses will be generated (SUCCESS indicates the completion of a operation), or another status code upon failure.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

OFCondition DcmQueryRetrieveIndexDatabaseHandle::storeRequest	(	const char *	SOPClassUID,
		const char *	SOPInstanceUID,
		const char *	imageFileName,
		DcmQueryRetrieveDatabaseStatus *	status,
		OFBool	isNew = OFTrue
	)		[virtual]

register the given DICOM object, which has been received through a C-STORE operation and stored in a file, in the database.

Parameters:

SOPClassUID	SOP class UID of DICOM instance
SOPInstanceUID	SOP instance UID of DICOM instance
imageFileName	file name (full path) of DICOM instance
status	pointer to DB status object in which a DIMSE status code suitable for use with the C-STORE-RSP message is set.
isNew	if true, the instance is marked as "new" in the database, if such a flag is maintained in the database.

Returns:

EC_Normal upon normal completion, or some other OFCondition code upon failure.

Implements DcmQueryRetrieveDatabaseHandle.

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

• dcmqrdb/include/dcmtk/dcmqrdb/dcmqrdbi.h