public HeaderLoader(HeaderStreamingContext context)
{
_studyInstanceUid = context.Parameters.StudyInstanceUID;
_partitionAE = context.Parameters.ServerAETitle;
_statistics.FindStudyFolder.Start();
string sessionId = context.CallerAE;
ServerPartition partition = ServerPartitionMonitor.Instance.GetPartition(_partitionAE);
StudyStorageLoader storageLoader = new StudyStorageLoader(sessionId);
storageLoader.CacheEnabled = ImageStreamingServerSettings.Default.EnableCache;
storageLoader.CacheRetentionTime = ImageStreamingServerSettings.Default.CacheRetentionWindow;
StudyLocation = storageLoader.Find(_studyInstanceUid, partition);
if (StudyLocation != null && StudyLocation.QueueStudyStateEnum != QueueStudyStateEnum.Idle)
{
Platform.Log(LogLevel.Warn, "Accessing to study {0} while its current state is {1}",
StudyLocation.StudyInstanceUid, StudyLocation.QueueStudyStateEnum);
}
_statistics.FindStudyFolder.End();
}
public Stream GetStudyHeader(string callingAETitle, HeaderStreamingParameters parameters)
{
ConnectionMonitor.GetMonitor(OperationContext.Current.Host).AddContext(OperationContext.Current);
HeaderStreamingStatistics stats = new HeaderStreamingStatistics();
stats.ProcessTime.Start();
HeaderLoader loader = null;
try
{
Platform.CheckForEmptyString(callingAETitle, "callingAETitle");
Platform.CheckForNullReference(parameters, "parameters");
Platform.CheckForEmptyString(parameters.ReferenceID, "parameters.ReferenceID");
Platform.CheckForEmptyString(parameters.ServerAETitle, "parameters.ServerAETitle");
Platform.CheckForEmptyString(parameters.StudyInstanceUID, "parameters.StudyInstanceUID");
Platform.Log(LogLevel.Debug, "Received request from {0}. Ref # {1} ", callingAETitle, parameters.ReferenceID);
HeaderStreamingContext context = new HeaderStreamingContext();
context.ServiceInstanceID = ID;
context.CallerAE = callingAETitle;
context.Parameters = parameters;
// TODO: perform permission check on callingAETitle
loader = new HeaderLoader(context);
if (!parameters.IgnoreInUse)
{
if (!loader.StudyLocation.CanBeUsedForDiagnostics())
{
throw new StudyAccessException(SR.FaultFaultStudyTemporarilyNotAccessible, loader.StudyLocation.QueueStudyStateEnum, null);
}
}
Stream stream = loader.Load();
if (stream == null)
{
throw new FaultException(loader.FaultDescription);
}
Platform.Log(LogLevel.Debug, "Response sent to {0}. Ref # {1} ", callingAETitle, parameters.ReferenceID);
return(stream);
}
catch (ArgumentException e)
{
throw new FaultException(e.Message);
}
catch (StudyNotFoundException)
{
throw new FaultException <StudyNotFoundFault>(
new StudyNotFoundFault(), String.Format(SR.FaultNotExists, parameters.StudyInstanceUID, parameters.ServerAETitle));
}
catch (StudyIsNearlineException e)
{
throw new FaultException <StudyIsNearlineFault>(
new StudyIsNearlineFault()
{
IsStudyBeingRestored = e.RestoreRequested
},
String.Format(SR.FaultStudyIsNearline, parameters.StudyInstanceUID));
}
catch (StudyAccessException e)
{
if (e.InnerException != null)
{
if (e.InnerException is FileNotFoundException)
{
throw new FaultException <StudyIsInUseFault>(
new StudyIsInUseFault(e.StudyState.Description),
String.Format(SR.FaultFaultStudyTemporarilyNotAccessible, parameters.StudyInstanceUID, e.StudyState));
}
}
throw new FaultException <StudyIsInUseFault>(
new StudyIsInUseFault(e.StudyState.Description),
String.Format(SR.FaultFaultStudyTemporarilyNotAccessible, parameters.StudyInstanceUID, e.StudyState));
}
catch (FilesystemNotReadableException e)
{
//interpret as generic fault
throw new FaultException(e.Message);
}
catch (FileNotFoundException e)
{
// OOPS.. the header is missing
Platform.Log(LogLevel.Error, e, "Unable to process study header request from {0}", callingAETitle);
throw new FaultException(SR.FaultHeaderIsNotAvailable);
}
catch (Exception e)
{
if (!(e is FaultException))
{
Platform.Log(LogLevel.Error, e, "Unable to process study header request from {0}", callingAETitle);
}
throw new FaultException(e.Message);
}
finally
{
stats.ProcessTime.End();
if (loader != null && Settings.Default.LogStatistics)
{
stats.AddField("StudyInstanceUid", parameters.StudyInstanceUID);
stats.AddSubStats(loader.Statistics);
StatisticsLogger.Log(LogLevel.Info, stats);
}
}
}
