/// <summary>
/// Finds the <see cref="StudyStorageLocation"/> for the specified study
/// </summary>
/// <param name="studyInstanceUid"></param>
/// <param name="partition"></param>
/// <returns></returns>
///
public StudyStorageLocation Find(string studyInstanceUid, ServerPartition partition)
{
TimeSpan STATS_WINDOW = TimeSpan.FromMinutes(1);
StudyStorageLocation location;
if (!CacheEnabled)
{
FilesystemMonitor.Instance.GetReadableStudyStorageLocation(partition.Key, studyInstanceUid,
StudyRestore.True, StudyCache.False,
out location);
}
else
{
Session session = _serverSessions[_sessionId];
StudyStorageCache cache;
lock (session)
{
cache = session["StorageLocationCache"] as StudyStorageCache;
if (cache == null)
{
cache = new StudyStorageCache {
RetentionTime = CacheRetentionTime
};
session.Add("StorageLocationCache", cache);
}
}
// lock the cache instead of the list so that we won't block requests from other
// clients if we need to fetch from the database.
lock (cache)
{
location = cache.Find(studyInstanceUid);
if (location == null)
{
_statistics.Misses++;
FilesystemMonitor.Instance.GetReadableStudyStorageLocation(partition.Key, studyInstanceUid, StudyRestore.True, StudyCache.False, out location);
cache.Insert(location, studyInstanceUid);
Platform.Log(LogLevel.Info, "Cache (since {0}): Hits {1} [{3:0}%], Miss {2}",
_statistics.StartTime,
_statistics.Hits, _statistics.Misses,
(float)_statistics.Hits / (_statistics.Hits + _statistics.Misses) * 100f);
}
else
{
_statistics.Hits++;
}
if (_statistics.ElapsedTime > STATS_WINDOW)
{
_statistics.Reset();
}
}
}
//TODO (CR April 2011): Should this be "not found"?
if (location == null)
{
throw new StudyIsNearlineException(false);
}
return(location);
}
/// <summary>
/// Finds the <see cref="StudyStorageLocation"/> for the specified study
/// </summary>
/// <param name="studyInstanceUid"></param>
/// <param name="partition"></param>
/// <returns></returns>
///
public StudyStorageLocation Find(string studyInstanceUid, ServerPartition partition)
{
TimeSpan STATS_WINDOW = TimeSpan.FromMinutes(1);
StudyStorageLocation location;
if (!CacheEnabled)
{
FilesystemMonitor.Instance.GetReadableStudyStorageLocation(partition.Key, studyInstanceUid,
StudyRestore.True, StudyCache.False,
out location);
}
else
{
Session session = _serverSessions[_sessionId];
StudyStorageCache cache;
lock (session)
{
cache = session["StorageLocationCache"] as StudyStorageCache;
if (cache == null)
{
cache = new StudyStorageCache {RetentionTime = CacheRetentionTime};
session.Add("StorageLocationCache", cache);
}
}
// lock the cache instead of the list so that we won't block requests from other
// clients if we need to fetch from the database.
lock (cache)
{
location = cache.Find(studyInstanceUid);
if (location == null)
{
_statistics.Misses++;
FilesystemMonitor.Instance.GetReadableStudyStorageLocation(partition.Key, studyInstanceUid, StudyRestore.True,StudyCache.False, out location);
cache.Insert(location, studyInstanceUid);
Platform.Log(LogLevel.Info, "Cache (since {0}): Hits {1} [{3:0}%], Miss {2}",
_statistics.StartTime,
_statistics.Hits, _statistics.Misses,
(float)_statistics.Hits / (_statistics.Hits + _statistics.Misses) * 100f);
}
else
{
_statistics.Hits++;
}
if (_statistics.ElapsedTime > STATS_WINDOW)
{
_statistics.Reset();
}
}
}
//TODO (CR April 2011): Should this be "not found"?
if (location == null)
throw new StudyIsNearlineException(false);
return location;
}
