/* Synchronized method to add file for given client id
* Throws exception if the user for present
*/
public bool addFileSynchronized(string clientid, UserFile file)
{
Logger.Debug("Adding file :" + file.filepath + " for client : " + clientid);
UserFileSystem fs = getUserFSFromMapSynchronized(clientid);
if (fs != null)
{
return(fs.addFileSynchronized(file));
}
else
{
throw new UserNotLoadedInMemoryException("Add file failed for user :"******" and file name :" + file.filepath);
}
}
//Merge the user file system
private UserFileSystem mergeUserFileSystems(UserFileSystem newfs, UserFileSystem oldfs)
{
Logger.Debug ("Merging user file systems for user id : " + newfs.metadata.clientId);
/*
* Rule of Fight Club ( UserFile system merge)
*
* 1) User meta data- The one with higher version number wins, although it will be mostly the
* newer file system object since user meta data is always maintained in memory
*
* 2) SharedFileList - This will be picked from the newer file system object since we don't have versioning for it
* and it is maintained in the memory always
*
* 3) File map -
* a) If there is a new file which is not present in the old file system
* If its marked for deletion - Don't add it
* If its not marked for deletion - Add it
* b) If there is file present in the new file system which is also present in the old file system
* If the version number of the new file is higher
* If its marked for deletion in the new file system delete that file
* If its not marked for deletion, replace the file
* If its version number is lower
* TOO BAD
* c) If there are files which are not present in the new file system which are present in old file system
* Ideally this should not happen since the all file names will always remain in memory. In any case, take the file on disk.
*
*
*/
if (newfs.metadata.versionNumber >= oldfs.metadata.versionNumber) {
oldfs.metadata = newfs.metadata; //replace
} else {
Logger.Warn ("The version number for the new user metadata is lower than the old, FIX ME FIX ME");
}
oldfs.sharedFiles = newfs.sharedFiles; //replace the shared file list
//now iterate over the file map, don't f**k up man
foreach (KeyValuePair<string, UserFile> entry in newfs.filemap) {
UserFile newfile = entry.Value;
UserFile oldfile = null;
string filename = entry.Key;
if (oldfs.filemap.ContainsKey (filename)) {
oldfile = oldfs.filemap [filename];
}
if (oldfile == null) { //case when there is new file and NO old file
if (newfile.filemetadata.markedForDeletion == false) {
oldfs.addFileSynchronized (newfile);
} else {
Logger.Debug ("File found marked for deleting, skipping it : " + filename);
}
} else { // case where there is old file and new file
if (newfile.filemetadata.versionNumber >= oldfile.filemetadata.versionNumber) { //lets roll
if (newfile.filemetadata.markedForDeletion == true) { //remove this file now
Logger.Debug ("File marked for deletion, removing : " + filename);
oldfs.removeFromMap (filename); //this will decrement the size
} else {
//long sizediff = newfile.filemetadata.filesize - oldfile.filemetadata.filesize;
oldfs.filemap [filename] = newfile;
//oldfs.incrementTotalFileSystemSize (sizediff);
}
}
}
}
return oldfs;
}
//Merge the user file system
private UserFileSystem mergeUserFileSystems(UserFileSystem newfs, UserFileSystem oldfs)
{
Logger.Debug("Merging user file systems for user id : " + newfs.metadata.clientId);
/*
* Rule of Fight Club ( UserFile system merge)
*
* 1) User meta data- The one with higher version number wins, although it will be mostly the
* newer file system object since user meta data is always maintained in memory
*
* 2) SharedFileList - This will be picked from the newer file system object since we don't have versioning for it
* and it is maintained in the memory always
*
* 3) File map -
* a) If there is a new file which is not present in the old file system
* If its marked for deletion - Don't add it
* If its not marked for deletion - Add it
* b) If there is file present in the new file system which is also present in the old file system
* If the version number of the new file is higher
* If its marked for deletion in the new file system delete that file
* If its not marked for deletion, replace the file
* If its version number is lower
* TOO BAD
* c) If there are files which are not present in the new file system which are present in old file system
* Ideally this should not happen since the all file names will always remain in memory. In any case, take the file on disk.
*
*
*/
if (newfs.metadata.versionNumber >= oldfs.metadata.versionNumber)
{
oldfs.metadata = newfs.metadata; //replace
}
else
{
Logger.Warn("The version number for the new user metadata is lower than the old, FIX ME FIX ME");
}
oldfs.sharedFiles = newfs.sharedFiles; //replace the shared file list
//now iterate over the file map, don't f**k up man
foreach (KeyValuePair <string, UserFile> entry in newfs.filemap)
{
UserFile newfile = entry.Value;
UserFile oldfile = null;
string filename = entry.Key;
if (oldfs.filemap.ContainsKey(filename))
{
oldfile = oldfs.filemap [filename];
}
if (oldfile == null) //case when there is new file and NO old file
{
if (newfile.filemetadata.markedForDeletion == false)
{
oldfs.addFileSynchronized(newfile);
}
else
{
Logger.Debug("File found marked for deleting, skipping it : " + filename);
}
}
else // case where there is old file and new file
{
if (newfile.filemetadata.versionNumber >= oldfile.filemetadata.versionNumber) //lets roll
{
if (newfile.filemetadata.markedForDeletion == true) //remove this file now
{
Logger.Debug("File marked for deletion, removing : " + filename);
oldfs.removeFromMap(filename); //this will decrement the size
}
else
{
//long sizediff = newfile.filemetadata.filesize - oldfile.filemetadata.filesize;
oldfs.filemap [filename] = newfile;
//oldfs.incrementTotalFileSystemSize (sizediff);
}
}
}
}
return(oldfs);
}
