public AssetBase Get(string id, out bool found)
{
m_assetRequests[id].Amt++;
m_Requests++;
AssetBase asset = null;
found = false;
bool forceMemCache = m_assetRequests[id].Amt > _forceMemoryCacheAmount;
if ((m_MemoryCacheEnabled || forceMemCache) && m_MemoryCache.TryGetValue(id, out asset))
{
found = true;
m_MemoryHits++;
}
else
{
string filename = GetFileName(id);
if (File.Exists(filename))
{
try
{
asset = ExtractAsset(id, asset, filename, forceMemCache);
found = true;
if (asset == null)
{
m_assetRequests[id].Amt = _forceMemoryCacheAmount;
}
}
catch (Exception e)
{
LogException(e);
// If there was a problem deserializing the asset, the asset may
// either be corrupted OR was serialized under an old format
// {different version of AssetBase} -- we should attempt to
// delete it and re-cache
File.Delete(filename);
}
}
#if WAIT_ON_INPROGRESS_REQUESTS
// Check if we're already downloading this asset. If so, try to wait for it to
// download.
if (m_WaitOnInprogressTimeout > 0)
{
m_RequestsForInprogress++;
ManualResetEvent waitEvent;
if (m_CurrentlyWriting.TryGetValue(filename, out waitEvent))
{
waitEvent.WaitOne(m_WaitOnInprogressTimeout);
return(Get(id));
}
}
#else
// Track how often we have the problem that an asset is requested while
// it is still being downloaded by a previous request.
if (m_CurrentlyWriting.Contains(filename))
{
m_RequestsForInprogress++;
}
#endif
}
if (((m_logLevel >= 1)) && (m_HitRateDisplay != 0) && (m_Requests % m_HitRateDisplay == 0))
{
m_HitRateFile = (double)m_DiskHits / m_Requests * 100.0;
MainConsole.Instance.InfoFormat("[FLOTSAM ASSET CACHE]: Cache Get :: {0} :: {1}", id,
asset == null ? "Miss" : "Hit");
MainConsole.Instance.InfoFormat("[FLOTSAM ASSET CACHE]: File Hit Rate {0}% for {1} requests",
m_HitRateFile.ToString("0.00"), m_Requests);
if (m_MemoryCacheEnabled)
{
m_HitRateMemory = (double)m_MemoryHits / m_Requests * 100.0;
MainConsole.Instance.InfoFormat("[FLOTSAM ASSET CACHE]: Memory Hit Rate {0}% for {1} requests",
m_HitRateMemory.ToString("0.00"), m_Requests);
}
MainConsole.Instance.InfoFormat(
"[FLOTSAM ASSET CACHE]: {0} unnessesary requests due to requests for assets that are currently downloading.",
m_RequestsForInprogress);
}
if (_assetMonitor != null)
{
_assetMonitor.AddAsset(asset);
}
return(asset);
}
public AssetBase Get(string id)
{
m_Requests++;
AssetBase asset = null;
if (m_MemoryCacheEnabled && m_MemoryCache.TryGetValue(id, out asset))
{
m_MemoryHits++;
}
else
{
string filename = GetFileName(id);
lock (m_fileCacheLock)
{
if (File.Exists(filename))
{
try
{
string file = File.ReadAllText(filename);
asset = new AssetBase();
asset.Unpack(OpenMetaverse.StructuredData.OSDParser.DeserializeJson(file));
UpdateMemoryCache(id, asset);
m_DiskHits++;
}
catch (SerializationException e)
{
LogException(e);
// If there was a problem deserializing the asset, the asset may
// either be corrupted OR was serialized under an old format
// {different version of AssetBase} -- we should attempt to
// delete it and re-cache
File.Delete(filename);
}
catch (Exception e)
{
LogException(e);
}
}
}
#if WAIT_ON_INPROGRESS_REQUESTS
// Check if we're already downloading this asset. If so, try to wait for it to
// download.
if (m_WaitOnInprogressTimeout > 0)
{
m_RequestsForInprogress++;
ManualResetEvent waitEvent;
if (m_CurrentlyWriting.TryGetValue(filename, out waitEvent))
{
waitEvent.WaitOne(m_WaitOnInprogressTimeout);
return(Get(id));
}
}
#else
// Track how often we have the problem that an asset is requested while
// it is still being downloaded by a previous request.
if (m_CurrentlyWriting.Contains(filename))
{
m_RequestsForInprogress++;
}
#endif
}
if (((m_logLevel >= 1)) && (m_HitRateDisplay != 0) && (m_Requests % m_HitRateDisplay == 0))
{
m_HitRateFile = (double)m_DiskHits / m_Requests * 100.0;
MainConsole.Instance.InfoFormat("[FLOTSAM ASSET CACHE]: Cache Get :: {0} :: {1}", id, asset == null ? "Miss" : "Hit");
MainConsole.Instance.InfoFormat("[FLOTSAM ASSET CACHE]: File Hit Rate {0}% for {1} requests",
m_HitRateFile.ToString("0.00"), m_Requests);
if (m_MemoryCacheEnabled)
{
m_HitRateMemory = (double)m_MemoryHits / m_Requests * 100.0;
MainConsole.Instance.InfoFormat("[FLOTSAM ASSET CACHE]: Memory Hit Rate {0}% for {1} requests",
m_HitRateMemory.ToString("0.00"), m_Requests);
}
MainConsole.Instance.InfoFormat(
"[FLOTSAM ASSET CACHE]: {0} unnessesary requests due to requests for assets that are currently downloading.",
m_RequestsForInprogress);
}
IAssetMonitor monitor =
(IAssetMonitor)
m_simulationBase.ApplicationRegistry.RequestModuleInterface <IMonitorModule>().GetMonitor("",
MonitorModuleHelper
.
AssetMonitor);
if (monitor != null)
{
monitor.AddAsset(asset);
}
return(asset);
}