/*Check point entry */
public void DoCheckPointAllUsers(CheckPointObject filesystem)
{
logger.Debug ("Do Check point method called for filesystem for timestamp : " + filesystem.lastcheckpoint);
CheckPointObject oldcheckpointobject = RestoreFileSystem (true); //load the old file in memory to merege
//logger.Debug ("POOP1 : " + oldcheckpointobject.userfilesystemlist[0].metadata.totalFileSystemSizeBytes);
//logger.Debug ("POOP2 : " + filesystem.userfilesystemlist[0].metadata.totalFileSystemSizeBytes);
DateTime newCheckPointTime = filesystem.lastcheckpoint;
filesystem = mergeCheckPointObjects (filesystem, oldcheckpointobject);
filesystem.lastcheckpoint = newCheckPointTime;
//logger.Debug (filesystem);
try {
string path = GenerateCheckpointPath (filesystem.lastcheckpoint);
logger.Debug ("Creating checkpointing path :" + path);
Directory.CreateDirectory (path);
string lastcheckpointfilepath = CheckpointLogic.pathprefix + CheckpointLogic.lastcheckpointfilename;
foreach( UserFileSystem userfs in filesystem.userfilesystemlist){
DoCheckPointForUser( userfs.metadata.clientId, path, userfs);
}
//Now update the last check point file so that we can restore this checkpoint
logger.Debug ("Writing to last checkpoint file at path : " + lastcheckpointfilepath);
System.IO.File.WriteAllText(lastcheckpointfilepath,
DateUtils.getStringfromDateTime(filesystem.lastcheckpoint) + "\n" + path);
}catch ( Exception e){
logger.Debug ("Exception :" + e);
throw e;
}
}
public CheckPointObject RestoreFileSystem(bool restoreFileContent)
{
logger.Debug("Restoring file system with restore file content as : " + restoreFileContent);
CheckPointObject checkObject = new CheckPointObject();
string lastcheckpointfilepath = pathprefix + lastcheckpointfilename;
try {
List <string> lastcheckpointfilecontent = FileUtils.ReadLinesFromFile(lastcheckpointfilepath);
logger.Debug("Last check point time stamp read :" + lastcheckpointfilecontent [0].Trim());
DateTime lastcheckpointtime = DateUtils.getDatefromString(lastcheckpointfilecontent [0].Trim());
logger.Debug("Read last checkpoint time as :" + lastcheckpointtime);
checkObject.lastcheckpoint = lastcheckpointtime;
if (lastcheckpointfilecontent.Count < 2)
{
throw new DiskuserMetaDataCorrupt("Something wrong with the last check point file path, check!!");
}
string latestcheckpointfolderpath = lastcheckpointfilecontent [1];
logger.Debug("Last check point path read as :" + latestcheckpointfolderpath);
latestcheckpointfolderpath = latestcheckpointfolderpath.Trim(); //remove any leading or trailing whitespaces
foreach (string userfolder in Directory.EnumerateDirectories(latestcheckpointfolderpath))
{
checkObject.userfilesystemlist.Add(RestoreUserFileSystem(userfolder, restoreFileContent));
}
logger.Debug("Returning the check point object as :" + checkObject.userfilesystemlist.Count);
} catch (Exception e) {
logger.Warn("Exception occured while restoring the file system : " + e);
}
return(checkObject);
}
/*Check point entry */
public void DoCheckPointAllUsers(CheckPointObject filesystem)
{
logger.Debug("Do Check point method called for filesystem for timestamp : " + filesystem.lastcheckpoint);
CheckPointObject oldcheckpointobject = RestoreFileSystem(true); //load the old file in memory to merege
//logger.Debug ("POOP1 : " + oldcheckpointobject.userfilesystemlist[0].metadata.totalFileSystemSizeBytes);
//logger.Debug ("POOP2 : " + filesystem.userfilesystemlist[0].metadata.totalFileSystemSizeBytes);
DateTime newCheckPointTime = filesystem.lastcheckpoint;
filesystem = mergeCheckPointObjects(filesystem, oldcheckpointobject);
filesystem.lastcheckpoint = newCheckPointTime;
//logger.Debug (filesystem);
try {
string path = GenerateCheckpointPath(filesystem.lastcheckpoint);
logger.Debug("Creating checkpointing path :" + path);
Directory.CreateDirectory(path);
string lastcheckpointfilepath = CheckpointLogic.pathprefix + CheckpointLogic.lastcheckpointfilename;
foreach (UserFileSystem userfs in filesystem.userfilesystemlist)
{
DoCheckPointForUser(userfs.metadata.clientId, path, userfs);
}
//Now update the last check point file so that we can restore this checkpoint
logger.Debug("Writing to last checkpoint file at path : " + lastcheckpointfilepath);
System.IO.File.WriteAllText(lastcheckpointfilepath,
DateUtils.getStringfromDateTime(filesystem.lastcheckpoint) + "\n" + path);
}catch (Exception e) {
logger.Debug("Exception :" + e);
throw e;
}
}
/*Check point entry */
public void DoCheckPoint(CheckPointObject filesystem)
{
logger.Debug("Check point method called for filesystem");
try{
string path = GenerateCheckpointPath(filesystem.lastcheckpoint);
logger.Debug("Creating checkpointing path :" + path);
Directory.CreateDirectory(path);
string lastcheckpointfilepath = this.pathprefix + this.lastcheckpointfilename;
foreach (UserFileSystem userfs in filesystem.userfilesystemlist)
{
DoCheckPointForUser(userfs.metadata.clientId, path, userfs);
}
//Now update the last check point file so that we can restore this checkpoint
logger.Debug("Writing to last checkpoint file at path : " + lastcheckpointfilepath);
System.IO.File.WriteAllText(lastcheckpointfilepath,
DateUtils.getStringfromDateTime(filesystem.lastcheckpoint) + "\n" + path);
}catch (Exception e) {
logger.Debug("Exception :" + e);
throw e;
}
}
//Merge the check point objects
private CheckPointObject mergeCheckPointObjects(CheckPointObject newimage, CheckPointObject oldimage)
{
logger.Debug("Merge check point objects");
CheckPointObject retObject = new CheckPointObject(); //ret object
foreach (UserFileSystem newfs in newimage.userfilesystemlist)
{
bool found = false;
foreach (UserFileSystem oldfs in oldimage.userfilesystemlist)
{
if (oldfs.metadata.clientId.Equals(newfs.metadata.clientId)) //match based on user id
{
found = true;
retObject.userfilesystemlist.Add(mergeUserFileSystems(newfs, oldfs));
}
}
if (!found)
{
retObject.userfilesystemlist.Add(newfs);
}
}
return(retObject);
}
} //default contructor
public CheckPointObject RestoreFileSystem()
{
logger.Debug("Restoring file system");
CheckPointObject checkObject = new CheckPointObject();
string lastcheckpointfilepath = pathprefix + lastcheckpointfilename;
List <string> lastcheckpointfilecontent = FileUtils.ReadLinesFromFile(lastcheckpointfilepath);
logger.Debug("Last check point time stamp read :" + lastcheckpointfilecontent[0].Trim());
DateTime lastcheckpointtime = DateUtils.getDatefromString(lastcheckpointfilecontent[0].Trim());
checkObject.lastcheckpoint = lastcheckpointtime;
logger.Debug("Poop : " + checkObject.lastcheckpoint);
string latestcheckpointfolderpath = lastcheckpointfilecontent [1];
logger.Debug("Last check point path read as :" + latestcheckpointfolderpath);
latestcheckpointfolderpath = latestcheckpointfolderpath.Trim(); //remove any leading or trailing whitespaces
foreach (string userfolder in Directory.EnumerateDirectories(latestcheckpointfolderpath))
{
checkObject.userfilesystemlist.Add(RestoreUserFileSystem(userfolder));
}
return(checkObject);
}
//Merge the check point objects
private CheckPointObject mergeCheckPointObjects(CheckPointObject newimage, CheckPointObject oldimage)
{
logger.Debug ("Merge check point objects");
CheckPointObject retObject = new CheckPointObject (); //ret object
foreach (UserFileSystem newfs in newimage.userfilesystemlist) {
bool found = false;
foreach (UserFileSystem oldfs in oldimage.userfilesystemlist) {
if (oldfs.metadata.clientId.Equals (newfs.metadata.clientId)) { //match based on user id
found = true;
retObject.userfilesystemlist.Add (mergeUserFileSystems (newfs, oldfs));
}
}
if (! found) {
retObject.userfilesystemlist.Add (newfs);
}
}
return retObject;
}
public CheckPointObject RestoreFileSystem(bool restoreFileContent)
{
logger.Debug ("Restoring file system with restore file content as : " + restoreFileContent);
CheckPointObject checkObject = new CheckPointObject ();
string lastcheckpointfilepath = pathprefix + lastcheckpointfilename;
try {
List<string> lastcheckpointfilecontent = FileUtils.ReadLinesFromFile (lastcheckpointfilepath);
logger.Debug ("Last check point time stamp read :" + lastcheckpointfilecontent [0].Trim ());
DateTime lastcheckpointtime = DateUtils.getDatefromString (lastcheckpointfilecontent [0].Trim ());
logger.Debug ("Read last checkpoint time as :" + lastcheckpointtime);
checkObject.lastcheckpoint = lastcheckpointtime;
if (lastcheckpointfilecontent.Count < 2)
throw new DiskuserMetaDataCorrupt ("Something wrong with the last check point file path, check!!");
string latestcheckpointfolderpath = lastcheckpointfilecontent [1];
logger.Debug ("Last check point path read as :" + latestcheckpointfolderpath);
latestcheckpointfolderpath = latestcheckpointfolderpath.Trim (); //remove any leading or trailing whitespaces
foreach (string userfolder in Directory.EnumerateDirectories(latestcheckpointfolderpath)) {
checkObject.userfilesystemlist.Add (RestoreUserFileSystem (userfolder, restoreFileContent));
}
logger.Debug ("Returning the check point object as :" + checkObject.userfilesystemlist.Count);
} catch (Exception e) {
logger.Warn ("Exception occured while restoring the file system : " + e);
}
return checkObject;
}
