public rrd4n.DataAccess.Data.FetchData GetData(rrd4n.DataAccess.Data.FetchRequest request)
{
RrdDb rrdDb = null;
try
{
string dataPath;
if (DataPath.Contains("${APPDATA}"))
{
dataPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
dataPath += DataPath.Substring(10);
}
else
{
dataPath = DataPath;
}
rrdDb = new RrdDb(dataPath + request.DatabasePath);
FetchRequest coreRequest = new FetchRequest(rrdDb.getPath(), request.ConsolidateFunctionName, request.FetchStart, request.FetchEnd, request.Resolution);
FetchData coreFetchData = rrdDb.fetchData(coreRequest);
return(new rrd4n.DataAccess.Data.FetchData(coreFetchData.getArcStep(), coreFetchData.getArcEndTime(), coreFetchData.getDsNames())
{
Values = coreFetchData.getValues(),
Timestamps = coreFetchData.getTimestamps()
});
}
finally
{
if (rrdDb != null)
{
rrdDb.close();
}
}
}
private void fetchRrdData()
{
long tEndFixed = (tEnd == 0) ? Util.getTimestamp() : tEnd;
for (int i = 0; i < defSources.Length; i++)
{
if (!defSources[i].isLoaded())
{
// not fetched yet
List<String> dsNames = new List<String>();
dsNames.Add(defSources[i].getDsName());
// look for all other datasources with the same path and the same consolidation function
for (int j = i + 1; j < defSources.Length; j++)
{
if (defSources[i].isCompatibleWith(defSources[j]))
{
dsNames.Add(defSources[j].getDsName());
}
}
// now we have everything
FetchRequest req = null;
if (defSources[i].StartTime == long.MinValue)
req = new FetchRequest(defSources[i].getPath(), defSources[i].getConsolFun().Name, tStart, tEndFixed, FetchRequestResolution);
else
{
long step = Math.Max(1, defSources[i].Step);
string reduceFunctionName = defSources[i].ReduceCfName;
if (string.IsNullOrEmpty(reduceFunctionName))
reduceFunctionName = defSources[i].getConsolFun().Name;
req = new FetchRequest(defSources[i].getPath(), reduceFunctionName, defSources[i].StartTime, defSources[i].EndTime, step);
}
req.setFilter(dsNames);
FetchData data = DbAccessInterface.GetData(req);
defSources[i].setFetchData(data);
for (int j = i + 1; j < defSources.Length; j++)
{
if (defSources[i].isCompatibleWith(defSources[j]))
defSources[j].setFetchData(data);
}
}
}
}
