org.dspace.app.itemexport

Class ItemExport

java.lang.Object

org.dspace.app.itemexport.ItemExport

public class ItemExport
extends java.lang.Object

Item exporter to create simple AIPs for DSpace content. Currently exports individual items, or entire collections. For instructions on use, see printUsage() method.

ItemExport creates the simple AIP package that the importer also uses. It consists of:

/exportdir/42/ (one directory per item) / dublin_core.xml - qualified dublin core in RDF schema / contents - text file, listing one file per line / file1 - files contained in the item / file2 / ...

issues -doesn't handle special characters in metadata (needs to turn &'s into &, etc.)

Modified by David Little, UCSD Libraries 12/21/04 to allow the registration of files (bitstreams) into DSpace.

Author:

David Little, Jay Paz

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	COMPRESSED_EXPORT_MIME_TYPE used for export download

Constructor Summary

Constructors

Constructor and Description
ItemExport()

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	assembleFileName(java.lang.String type, EPerson eperson, java.util.Date date) Create a file name based on the date and eperson
static boolean	canDownload(Context context, java.lang.String fileName) The file name of the export archive contains the eperson id of the person who created it When requested for download this method can check if the person requesting it is the same one that created it
static void	createDownloadableExport(DSpaceObject dso, Context context, boolean migrate) Convenience methot to create export a single Community, Collection, or Item
static void	createDownloadableExport(DSpaceObject dso, Context context, java.lang.String additionalEmail, boolean migrate) Convenience methot to create export a single Community, Collection, or Item
static void	createDownloadableExport(java.util.List<DSpaceObject> dsObjects, Context context, boolean migrate) Convenience method to export a List of dspace objects (Community, Collection or Item)
static void	createDownloadableExport(java.util.List<DSpaceObject> dsObjects, Context context, java.lang.String additionalEmail, boolean migrate) Convenience method to export a List of dspace objects (Community, Collection or Item)
static void	deleteOldExportArchives() A clean up method that is ran before a new export archive is created.
static void	deleteOldExportArchives(int epersonID) A clean up method that is ran before a new export archive is created.
static void	emailErrorMessage(EPerson eperson, java.lang.String error) Since the archive is created in a new thread we are unable to communicate with calling method about success or failure.
static void	emailSuccessMessage(Context context, EPerson eperson, java.lang.String fileName) Since the archive is created in a new thread we are unable to communicate with calling method about success or failure.
static void	exportAsZip(Context context, ItemIterator items, java.lang.String destDirName, java.lang.String zipFileName, int seqStart, boolean migrate) Method to perform an export and save it as a zip file.
static java.lang.String	getExportDownloadDirectory(int ePersonID) Use config file entry for org.dspace.app.itemexport.download.dir and id of the eperson to create a download directory name
static java.io.InputStream	getExportDownloadInputStream(java.lang.String fileName, EPerson eperson) Used to read the export archived.
static long	getExportFileLastModified(java.lang.String fileName)
static long	getExportFileSize(java.lang.String fileName) Get the file size of the export archive represented by the file name.
static java.util.List<java.lang.String>	getExportsAvailable(EPerson eperson) Reads the download directory for the eperson to see if any export archives are available
static java.lang.String	getExportWorkDirectory() Returns config file entry for org.dspace.app.itemexport.work.dir
static void	main(java.lang.String[] argv)
static void	zip(java.lang.String strSource, java.lang.String target)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COMPRESSED_EXPORT_MIME_TYPE

public static final java.lang.String COMPRESSED_EXPORT_MIME_TYPE

used for export download

See Also:

Constant Field Values

Constructor Detail

ItemExport

public ItemExport()

Method Detail

main

public static void main(java.lang.String[] argv)
                 throws java.lang.Exception

Throws:

java.lang.Exception

exportAsZip

public static void exportAsZip(Context context,
               ItemIterator items,
               java.lang.String destDirName,
               java.lang.String zipFileName,
               int seqStart,
               boolean migrate)
                        throws java.lang.Exception

Method to perform an export and save it as a zip file.

Parameters:

context - The DSpace Context

items - The items to export

destDirName - The directory to save the export in

zipFileName - The name to save the zip file as

seqStart - The first number in the sequence

migrate - Whether to use the migrate option or not

Throws:

java.lang.Exception

createDownloadableExport

public static void createDownloadableExport(DSpaceObject dso,
                            Context context,
                            boolean migrate)
                                     throws java.lang.Exception

Convenience methot to create export a single Community, Collection, or Item

Parameters:

dso - - the dspace object to export

context - - the dspace context

Throws:

java.lang.Exception

createDownloadableExport

public static void createDownloadableExport(java.util.List<DSpaceObject> dsObjects,
                            Context context,
                            boolean migrate)
                                     throws java.lang.Exception

Convenience method to export a List of dspace objects (Community, Collection or Item)

Parameters:

dsObjects - - List containing dspace objects

context - - the dspace context

Throws:

java.lang.Exception

createDownloadableExport

public static void createDownloadableExport(DSpaceObject dso,
                            Context context,
                            java.lang.String additionalEmail,
                            boolean migrate)
                                     throws java.lang.Exception

Convenience methot to create export a single Community, Collection, or Item

Parameters:

dso - - the dspace object to export

context - - the dspace context

additionalEmail - - cc email to use

Throws:

java.lang.Exception

createDownloadableExport

public static void createDownloadableExport(java.util.List<DSpaceObject> dsObjects,
                            Context context,
                            java.lang.String additionalEmail,
                            boolean migrate)
                                     throws java.lang.Exception

Convenience method to export a List of dspace objects (Community, Collection or Item)

Parameters:

dsObjects - - List containing dspace objects

context - - the dspace context

additionalEmail - - cc email to use

Throws:

java.lang.Exception

assembleFileName

public static java.lang.String assembleFileName(java.lang.String type,
                                EPerson eperson,
                                java.util.Date date)
                                         throws java.lang.Exception

Create a file name based on the date and eperson

Parameters:

eperson - - eperson who requested export and will be able to download it

date - - the date the export process was created

Returns:

String representing the file name in the form of 'export_yyy_MMM_dd_count_epersonID'

Throws:

java.lang.Exception

getExportDownloadDirectory

public static java.lang.String getExportDownloadDirectory(int ePersonID)
                                                   throws java.lang.Exception

Use config file entry for org.dspace.app.itemexport.download.dir and id of the eperson to create a download directory name

Parameters:

ePersonID - - id of the eperson who requested export archive

Returns:

String representing a directory in the form of org.dspace.app.itemexport.download.dir/epersonID

Throws:

java.lang.Exception

getExportWorkDirectory

public static java.lang.String getExportWorkDirectory()
                                               throws java.lang.Exception

Returns config file entry for org.dspace.app.itemexport.work.dir

Returns:

String representing config file entry for org.dspace.app.itemexport.work.dir

Throws:

java.lang.Exception

getExportDownloadInputStream

public static java.io.InputStream getExportDownloadInputStream(java.lang.String fileName,
                                               EPerson eperson)
                                                        throws java.lang.Exception

Used to read the export archived. Inteded for download.

Parameters:

fileName - the name of the file to download

eperson - the eperson requesting the download

Returns:

an input stream of the file to be downloaded

Throws:

java.lang.Exception

getExportFileSize

public static long getExportFileSize(java.lang.String fileName)
                              throws java.lang.Exception

Get the file size of the export archive represented by the file name.

Parameters:

fileName - name of the file to get the size.

Throws:

java.lang.Exception

getExportFileLastModified

public static long getExportFileLastModified(java.lang.String fileName)
                                      throws java.lang.Exception

Throws:

java.lang.Exception

canDownload

public static boolean canDownload(Context context,
                  java.lang.String fileName)

The file name of the export archive contains the eperson id of the person who created it When requested for download this method can check if the person requesting it is the same one that created it

Parameters:

context - dspace context

fileName - the file name to check auths for

Returns:

true if it is the same person false otherwise

getExportsAvailable

public static java.util.List<java.lang.String> getExportsAvailable(EPerson eperson)
                                                            throws java.lang.Exception

Reads the download directory for the eperson to see if any export archives are available

Parameters:

eperson -

Returns:

a list of file names representing export archives that have been processed

Throws:

java.lang.Exception

deleteOldExportArchives

public static void deleteOldExportArchives(int epersonID)
                                    throws java.lang.Exception

A clean up method that is ran before a new export archive is created. It uses the config file entry 'org.dspace.app.itemexport.life.span.hours' to determine if the current exports are too old and need pruging

Parameters:

epersonID - - the id of the eperson to clean up

Throws:

java.lang.Exception

deleteOldExportArchives

public static void deleteOldExportArchives()
                                    throws java.lang.Exception

A clean up method that is ran before a new export archive is created. It uses the config file entry 'org.dspace.app.itemexport.life.span.hours' to determine if the current exports are too old and need purgeing Removes all old exports, not just those for the person doing the export.

Throws:

java.lang.Exception

emailSuccessMessage

public static void emailSuccessMessage(Context context,
                       EPerson eperson,
                       java.lang.String fileName)
                                throws javax.mail.MessagingException

Since the archive is created in a new thread we are unable to communicate with calling method about success or failure. We accomplis this communication with email instead. Send a success email once the export archive is complete and ready for download

Parameters:

context - - the current Context

eperson - - eperson to send the email to

fileName - - the file name to be downloaded. It is added to the url in the email

Throws:

javax.mail.MessagingException

emailErrorMessage

public static void emailErrorMessage(EPerson eperson,
                     java.lang.String error)
                              throws javax.mail.MessagingException

Since the archive is created in a new thread we are unable to communicate with calling method about success or failure. We accomplis this communication with email instead. Send an error email if the export archive fails

Parameters:

eperson - - EPerson to send the error message to

error - - the error message

Throws:

javax.mail.MessagingException

zip

public static void zip(java.lang.String strSource,
       java.lang.String target)
                throws java.lang.Exception

Throws:

java.lang.Exception