protected override void ProcessItem(Model.WorkQueue item)
{
Platform.CheckForNullReference(item, "item");
Platform.Log(LogLevel.Info,
"Starting Tier Migration of study {0} for Patient {1} (PatientId:{2} A#:{3}) on Partition {4}",
Study.StudyInstanceUid, Study.PatientsName, Study.PatientId,
Study.AccessionNumber, ServerPartition.Description);
// The WorkQueue Data column contains the state of the processing. It is set to "Migrated" if the entry has been
// successfully executed once.
TierMigrationProcessingState state = GetCurrentState(item);
switch (state)
{
case TierMigrationProcessingState.Migrated:
Platform.Log(LogLevel.Info, "Study has been migrated to {0} on {1}", StorageLocation.FilesystemPath, StorageLocation.FilesystemTierEnum.Description);
PostProcessing(item, WorkQueueProcessorStatus.Complete, WorkQueueProcessorDatabaseUpdate.ResetQueueState);
break;
case TierMigrationProcessingState.NotStated:
ServerFilesystemInfo currFilesystem = FilesystemMonitor.Instance.GetFilesystemInfo(StorageLocation.FilesystemKey);
ServerFilesystemInfo newFilesystem = FilesystemMonitor.Instance.GetLowerTierFilesystemForStorage(currFilesystem);
if (newFilesystem == null)
{
// This entry shouldn't have been scheduled in the first place.
// It's possible that the folder wasn't full when the entry was scheduled.
// Another possiblity is the study was migrated but an error was encountered when updating the entry.//
// We should re-insert the filesystem queue so that if the study will be migrated if the space is freed up
// in the future.
String msg = String.Format(
"Study '{0}' cannot be migrated: no writable filesystem can be found in lower tiers for filesystem '{1}'. Reschedule migration for future.",
StorageLocation.StudyInstanceUid, currFilesystem.Filesystem.Description);
Platform.Log(LogLevel.Warn, msg);
ReinsertFilesystemQueue();
PostProcessing(item, WorkQueueProcessorStatus.Complete, WorkQueueProcessorDatabaseUpdate.ResetQueueState);
}
else
{
DoMigrateStudy(StorageLocation, newFilesystem);
// Update the state separately so that if the validation (done in the PostProcessing method) fails,
// we know the study has been migrated when we resume after auto-recovery has been completed.
UpdateState(item.Key, TierMigrationProcessingState.Migrated);
PostProcessing(item, WorkQueueProcessorStatus.Complete, WorkQueueProcessorDatabaseUpdate.ResetQueueState);
}
break;
default:
throw new NotImplementedException("Not implemented");
}
}
private static void UpdateState(ServerEntityKey key, TierMigrationProcessingState state)
{
TierMigrationWorkQueueData data = new TierMigrationWorkQueueData {
State = state
};
using (IUpdateContext context = PersistentStoreRegistry.GetDefaultStore().OpenUpdateContext(UpdateContextSyncMode.Flush))
{
IWorkQueueEntityBroker broker = context.GetBroker <IWorkQueueEntityBroker>();
WorkQueueUpdateColumns parms = new WorkQueueUpdateColumns {
Data = XmlUtils.SerializeAsXmlDoc(data)
};
if (!broker.Update(key, parms))
{
throw new ApplicationException("Unable to update work queue state");
}
context.Commit();
}
}
private static void UpdateState(ServerEntityKey key, TierMigrationProcessingState state)
{
TierMigrationWorkQueueData data = new TierMigrationWorkQueueData {State = state};
using(IUpdateContext context = PersistentStoreRegistry.GetDefaultStore().OpenUpdateContext(UpdateContextSyncMode.Flush))
{
IWorkQueueEntityBroker broker = context.GetBroker<IWorkQueueEntityBroker>();
WorkQueueUpdateColumns parms = new WorkQueueUpdateColumns {Data = XmlUtils.SerializeAsXmlDoc(data)};
if (!broker.Update(key, parms))
throw new ApplicationException("Unable to update work queue state");
context.Commit();
}
}
