/**
* Send a file to cloud to be preserved.
*
* @param context context DSpace
* @param filename name of the file
* @return true if file correctly sent to cloud, or false if not
*/
private Boolean sendFileToCloud(Context context, String filename) {
// send file to cloud and receive the ETag
String Etag = newCloudConnection.sendFile(context, filename);
// if Etag is null, fails to send file to cloud, return false
if (Etag == null) return false;
// get the handler to be recognized in the db
int firstSlash = filename.indexOf('@');
int secondSlash = filename.indexOf('.');
String handler = filename.substring(firstSlash + 1, secondSlash);
handler = handler.replace('-', '/');
// get the correct etag
Etag = Etag.substring(1, Etag.length() - 1);
// get md5 of the local file
String md5 = this.getMD5File(filename);
// regist the operation in the db
BackupProcess newRegist = new BackupProcess();
newRegist.updateProcessSendCloud(context, handler, md5, Etag);
return true;
}
/**
* See if is necessary and possible to get the backup file from cloud.
*
* @param context DSpace context
* @param ref ID of the object
* @param type type of the object DSpace
* @return true if it is necessary or possible to get the backup from cloud or false if not
*/
private Boolean couldGetFileFromCloud(Context context, int ref, int type) {
// get the corresponding Dspace Object
DSpaceObject obj = this.getDSpaceObject(context, type, ref);
// if Object DSpace doesn't exist, return false
if (obj == null) return false;
// see if backup file exists in cloud, if not return false
if (this.filesInCloud.containsKey(obj.getHandle())) {
BackupProcess backupPro = new BackupProcess();
String ETagSaved = backupPro.getETag(context, obj.getHandle());
// see if ETag of file in cloud, has equal to the last send, if not return false
if (ETagSaved.compareTo(this.filesInCloud.get(obj.getHandle())) == 0) {
// see if exists backup file locally
Backup backup = new Backup();
String filename = backup.getFileNameObj(obj);
Boolean existLocalFile = backup.existFile(filename);
// if not exist file locally return true
if (existLocalFile == true) {
// get MD5 of local file
String md5LocalFile = backup.getMD5File(filename);
// get MD5 of the last file sent to cloud
String md5FileSentCloud = backupPro.getSentMD5(context, obj.getHandle());
// if files equal, there is no necessity to get file from cloud, then return false
if (md5LocalFile.compareTo(md5FileSentCloud) == 0) return false;
else return true;
} else return true;
} else return false;
} else return false;
}
/**
* See if the last backup done is updated and if it is in cloud. DSpace Object could be community,
* collection or item
*
* @param context DSpace context
* @param ref ID of the object
* @param type type of the object DSpace
* @return true if the updated backup is in the cloud or false if not
*/
private Boolean sendDone(Context context, int ref, int type) {
// see if object is a community or collection
if (type == Constants.COMMUNITY || type == Constants.COLLECTION) {
// see if there is a modification registry in the db
Logbackup logbackup = new Logbackup();
Boolean existLog = logbackup.existsLog(context, ref, type);
// if modification has been detected return false
if (existLog == true) return false;
}
// get the DSpaceObject
DSpaceObject obj = this.getDSpaceObject(context, type, ref);
// if Object DSpace doesn't exist, return false
if (obj == null) return false;
// see if exist a regist of a backup in the table sthandfile
BackupProcess backupProcess = new BackupProcess();
Boolean existRegist = backupProcess.existRegist(context, obj.getHandle());
// if doesn't exist a regist return false
if (existRegist == false) return false;
// see if object is an item
if (type == Constants.ITEM) {
// get the last modification date of the item
Item item = null;
try {
item = Item.find(context, ref);
} catch (SQLException ex) {
Logger.getLogger(ActualContentManagement.class.getName()).log(Level.SEVERE, null, ex);
}
Date lastModification = item.getLastModified();
// get the last backup date
Date lastBackup = backupProcess.getLastBackupDate(context, obj.getHandle());
// see if some modification happens after a backup
if (lastModification.after(lastBackup) == true) return false;
}
// get the last send cloud dat
Date lastSendCloud = backupProcess.getLastSendCloudDate(context, obj.getHandle());
// if doesn't exist a date relative to the last send to cloud return false
if (lastSendCloud == null) return false;
// get the last backup date
Date lastBackup = backupProcess.getLastBackupDate(context, obj.getHandle());
// verify if a new backup happened
if (lastSendCloud.before(lastBackup) == true) {
// see if new md5 file backup is equal to the last md5 file backup sent to cloud
Boolean equalFiles = backupProcess.equalsFiles(context, obj.getHandle());
// if equal files return true
if (equalFiles == false) return false;
}
// see if file exists in cloud, if not returns false
if (this.filesInCloud.containsKey(obj.getHandle())) {
// see if ETag is correct, if not returns false
if (this.filesInCloud
.get(obj.getHandle())
.compareTo(backupProcess.getETag(context, obj.getHandle()))
== 0) return true;
else return false;
} else return false;
}
