/// <summary>
/// Retrieves the storage location from the database for the specified study storage key. Checks if the filesystem is online.
/// </summary>
/// <param name="studyStorageKey"></param>
/// <param name="location"></param>
/// <returns></returns>
public bool GetWritableStudyStorageLocation(ServerEntityKey studyStorageKey, out StudyStorageLocation location)
{
// NOTE: THIS METHOD SHOULD NOT LOAD THE RECORD FROM THE CACHE
using (ServerExecutionContext context = new ServerExecutionContext())
{
IQueryStudyStorageLocation procedure = context.ReadContext.GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters parms = new StudyStorageLocationQueryParameters
{
StudyStorageKey = studyStorageKey
};
IList <StudyStorageLocation> locationList = procedure.Find(parms);
foreach (StudyStorageLocation studyLocation in locationList)
{
string reason;
if (CheckFilesystemOnline(studyLocation.FilesystemKey, out reason))
{
location = studyLocation;
return(true);
}
}
// TODO: throw new FilesystemIsNotWritableException();
location = null;
return(false);
}
}
/// <summary>
/// Gets the <see cref="StudyStorageLocation"/> for the study associated with the specified <see cref="WorkQueue"/> item.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
static public StudyStorageLocation GetLoadStorageLocation(WorkQueue item)
{
IQueryStudyStorageLocation select = HttpContextData.Current.ReadContext.GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters parms = new StudyStorageLocationQueryParameters();
parms.StudyStorageKey = item.StudyStorageKey;
IList <StudyStorageLocation> storages = select.Find(parms);
if (storages == null || storages.Count == 0)
{
Platform.Log(LogLevel.Error, "Unable to find storage location for WorkQueue item: {0}",
item.Key.ToString());
throw new ApplicationException("Unable to find storage location for WorkQueue item.");
}
if (storages.Count > 1)
{
Platform.Log(LogLevel.Warn,
"WorkQueueController:LoadWritableStorageLocation: multiple study storage found for work queue item {0}",
item.Key.Key);
}
return(storages[0]);
}
public IList <StudyStorageLocation> GetStudyStorageLocation(Study study)
{
Platform.CheckForNullReference(study, "Study");
IQueryStudyStorageLocation select = HttpContext.Current.GetSharedPersistentContext().GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters parms = new StudyStorageLocationQueryParameters
{
StudyStorageKey = study.StudyStorageKey
};
IList <StudyStorageLocation> storage = select.Find(parms);
if (storage == null)
{
storage = new List <StudyStorageLocation>();
Platform.Log(LogLevel.Warn, "Unable to find storage location for Study item: {0}",
study.GetKey().ToString());
}
if (storage.Count > 1)
{
Platform.Log(LogLevel.Warn,
"StudyController:GetStudyStorageLocation: multiple study storage found for study {0}",
study.GetKey().Key);
}
return(storage);
}
/// <summary>
/// Retrieves the storage location from the database for the specified study. Checks if the filesystem is writable.
/// </summary>
/// <param name="location">The output storage location</param>
/// <param name="partitionKey">The primark key of the ServerPartition table.</param>
/// <param name="studyInstanceUid">The Study Instance UID of the study</param>
/// <param name="cache">Should the study location be cached?</param>
/// <param name="restore">If nearline, should the study be restored?</param>
/// <returns></returns>
public void GetWritableStudyStorageLocation(ServerEntityKey partitionKey, string studyInstanceUid, StudyRestore restore, StudyCache cache, out StudyStorageLocation location)
{
using (var context = new ServerExecutionContext())
{
string reason;
if (cache == StudyCache.True)
{
location = _storageLocationCache.GetCachedStudy(partitionKey, studyInstanceUid);
if (location != null)
{
if (CheckFilesystemWriteable(location.FilesystemKey, out reason))
{
return;
}
}
}
else
{
location = null;
}
IQueryStudyStorageLocation procedure = context.ReadContext.GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters parms = new StudyStorageLocationQueryParameters
{
ServerPartitionKey = partitionKey,
StudyInstanceUid = studyInstanceUid
};
IList <StudyStorageLocation> locationList = procedure.Find(parms);
bool found = false;
FilesystemNotWritableException x = new FilesystemNotWritableException();
foreach (StudyStorageLocation studyLocation in locationList)
{
if (CheckFilesystemWriteable(studyLocation.FilesystemKey, out reason))
{
location = studyLocation;
if (cache == StudyCache.True)
{
_storageLocationCache.AddCachedStudy(location);
}
return;
}
found = true;
x.Reason = reason;
x.Path = studyLocation.StudyFolder;
}
if (found)
{
throw x;
}
CheckForStudyRestore(context.ReadContext, partitionKey, studyInstanceUid, restore);
}
}
/// <summary>
/// Retrieves the storage location from the database for the specified study. Checks if the filesystem is readable.
/// </summary>
/// <param name="partitionKey"></param>
/// <param name="studyInstanceUid"></param>
/// <param name="restore"></param>
/// <param name="cache"></param>
/// <param name="location"></param>
public void GetReadableStudyStorageLocation(ServerEntityKey partitionKey, string studyInstanceUid, StudyRestore restore, StudyCache cache,
out StudyStorageLocation location)
{
using (ServerExecutionContext context = new ServerExecutionContext())
{
// Get the cached value, if it exists, otherwise fall down and recheck
// and handle any nearline issues below
location = _storageLocationCache.GetCachedStudy(partitionKey, studyInstanceUid);
if (location != null)
{
string reason;
if (CheckFilesystemReadable(location.FilesystemKey, out reason))
{
return;
}
}
IQueryStudyStorageLocation procedure = context.ReadContext.GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters parms = new StudyStorageLocationQueryParameters
{
StudyInstanceUid = studyInstanceUid,
ServerPartitionKey = partitionKey
};
IList <StudyStorageLocation> locationList = procedure.Find(parms);
bool foundStudy = false;
FilesystemNotReadableException x = new FilesystemNotReadableException();
foreach (StudyStorageLocation studyLocation in locationList)
{
string reason;
if (CheckFilesystemReadable(studyLocation.FilesystemKey, out reason))
{
location = studyLocation;
if (cache == StudyCache.True)
{
_storageLocationCache.AddCachedStudy(location);
}
return;
}
foundStudy = true;
x.Path = studyLocation.FilesystemPath;
x.Reason = reason;
}
if (foundStudy)
{
throw x;
}
CheckForStudyRestore(context.ReadContext, partitionKey, studyInstanceUid, restore);
}
}
protected bool GetStudyStorageLocation(ServerEntityKey partitionKey, string studyInstanceUid, out StudyStorageLocation location)
{
using (IReadContext context = PersistentStoreRegistry.GetDefaultStore().OpenReadContext())
{
IQueryStudyStorageLocation procedure = context.GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters parms = new StudyStorageLocationQueryParameters();
parms.ServerPartitionKey = partitionKey;
parms.StudyInstanceUid = studyInstanceUid;
location = procedure.FindOne(parms);
return(location != null);
}
}
static public IList <StudyStorageLocation> FindStorageLocations(ServerEntityKey partitionKey, string studyInstanceUid)
{
using (var context = new ServerExecutionContext())
{
IQueryStudyStorageLocation locQuery = context.ReadContext.GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters locParms = new StudyStorageLocationQueryParameters
{
StudyInstanceUid = studyInstanceUid,
ServerPartitionKey = partitionKey
};
IList <StudyStorageLocation> list = locQuery.Find(locParms);
return(list);
}
}
static public IList <StudyStorageLocation> FindStorageLocations(
IPersistenceContext context, StudyStorage storage,
Predicate <StudyStorageLocation> filter)
{
IQueryStudyStorageLocation locQuery = context.GetBroker <IQueryStudyStorageLocation>();
StudyStorageLocationQueryParameters locParms = new StudyStorageLocationQueryParameters
{
StudyInstanceUid = storage.StudyInstanceUid,
ServerPartitionKey = storage.ServerPartitionKey
};
IList <StudyStorageLocation> list = locQuery.Find(locParms);
if (filter != null)
{
CollectionUtils.Remove(list, filter);
}
return(list);
}
/// <summary>
/// Do the restore.
/// </summary>
/// <param name="queueItem">The queue item to restore.</param>
public void Run(RestoreQueue queueItem)
{
using (RestoreProcessorContext context = new RestoreProcessorContext(queueItem))
{
try
{
// Load up related classes.
using (IReadContext readContext = _nasArchive.PersistentStore.OpenReadContext())
{
_archiveStudyStorage = ArchiveStudyStorage.Load(readContext, queueItem.ArchiveStudyStorageKey);
_serverSyntax = ServerTransferSyntax.Load(readContext, _archiveStudyStorage.ServerTransferSyntaxKey);
_syntax = TransferSyntax.GetTransferSyntax(_serverSyntax.Uid);
StudyStorageLocationQueryParameters parms = new StudyStorageLocationQueryParameters
{
StudyStorageKey = queueItem.StudyStorageKey
};
IQueryStudyStorageLocation broker = readContext.GetBroker <IQueryStudyStorageLocation>();
_location = broker.FindOne(parms);
if (_location == null)
{
_studyStorage = StudyStorage.Load(readContext, queueItem.StudyStorageKey);
if (_studyStorage == null)
{
DateTime scheduleTime = Platform.Time.AddMinutes(5);
Platform.Log(LogLevel.Error, "Unable to find storage location, rescheduling restore request to {0}",
scheduleTime);
queueItem.FailureDescription = "Unable to find storage location, rescheduling request.";
_nasArchive.UpdateRestoreQueue(queueItem, RestoreQueueStatusEnum.Pending, scheduleTime);
return;
}
}
}
if (_location == null)
{
Platform.Log(LogLevel.Info, "Starting restore of nearline study: {0}", _studyStorage.StudyInstanceUid);
}
else
{
Platform.Log(LogLevel.Info, "Starting restore of online study: {0}", _location.StudyInstanceUid);
}
// If restoring a Nearline study, select a filesystem
string destinationFolder;
if (_location == null)
{
ServerFilesystemInfo fs = _nasArchive.Selector.SelectFilesystem();
if (fs == null)
{
DateTime scheduleTime = Platform.Time.AddMinutes(5);
Platform.Log(LogLevel.Error, "No writeable filesystem for restore, rescheduling restore request to {0}",
scheduleTime);
queueItem.FailureDescription = "No writeable filesystem for restore, rescheduling request.";
_nasArchive.UpdateRestoreQueue(queueItem, RestoreQueueStatusEnum.Pending, scheduleTime);
return;
}
destinationFolder = Path.Combine(fs.Filesystem.FilesystemPath, _nasArchive.ServerPartition.PartitionFolder);
}
else
{
destinationFolder = _location.GetStudyPath();
}
// Get the zip file path from the xml data in the ArchiveStudyStorage entry
// Also store the "StudyFolder" for use below
string studyFolder = String.Empty;
string filename = String.Empty;
string studyInstanceUid = String.Empty;
XmlElement element = _archiveStudyStorage.ArchiveXml.DocumentElement;
if (element != null)
{
foreach (XmlElement node in element.ChildNodes)
{
if (node.Name.Equals("StudyFolder"))
{
studyFolder = node.InnerText;
}
else if (node.Name.Equals("Filename"))
{
filename = node.InnerText;
}
else if (node.Name.Equals("Uid"))
{
studyInstanceUid = node.InnerText;
}
}
}
string zipFile = Path.Combine(_nasArchive.NasPath, studyFolder);
zipFile = Path.Combine(zipFile, studyInstanceUid);
zipFile = Path.Combine(zipFile, filename);
// Do a test read of the zip file. If it succeeds, the file is available, if it
// fails, we just set back to pending and recheck.
try
{
FileStream stream = File.OpenRead(zipFile);
// Read a byte, just in case that makes a difference.
stream.ReadByte();
stream.Close();
stream.Dispose();
}
catch (Exception ex)
{
DateTime scheduledTime = Platform.Time.AddSeconds(NasSettings.Default.ReadFailRescheduleDelaySeconds);
Platform.Log(LogLevel.Error, ex, "Archive {0} for Study {1} is unreadable, rescheduling restore to {2}",
zipFile, _studyStorage == null ? (_location == null ? string.Empty : _location.StudyInstanceUid) : _studyStorage.StudyInstanceUid,
scheduledTime);
// Just reschedule in "Restoring" state, the file is unreadable.
_nasArchive.UpdateRestoreQueue(queueItem, RestoreQueueStatusEnum.Restoring,
scheduledTime);
return;
}
if (_location == null)
{
RestoreNearlineStudy(queueItem, zipFile, destinationFolder, studyFolder);
}
else
{
RestoreOnlineStudy(queueItem, zipFile, destinationFolder);
}
}
catch (Exception e)
{
Platform.Log(LogLevel.Error, e, "Unexpected exception processing restore request for {0} on archive {1}",
_studyStorage == null ? (_location == null ? string.Empty : _location.StudyInstanceUid) : _studyStorage.StudyInstanceUid,
_nasArchive.PartitionArchive.Description);
queueItem.FailureDescription = e.Message;
_nasArchive.UpdateRestoreQueue(queueItem, RestoreQueueStatusEnum.Failed, Platform.Time);
}
}
}
