// public async Task<ICursor> GetCursorAsync<T>(Signal signal, string fragment)
/// <summary>
/// 使用Cursor读取大数据
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="signal"></param>
/// <param name="fragment"></param>
/// <returns></returns>
public async Task <ICursor> GetCursorAsync(Signal signal, string dataFragment)
{
var waveSig = signal as FixedIntervalWaveSignal;
if (waveSig == null)
{
throw new Exception(ErrorMessages.NotValidSignalError);
}
WaveFragment frag = null;
try
{
frag = WaveFragment.Parse(waveSig, dataFragment);
}
catch (Exception)
{
throw new Exception(ErrorMessages.NotValidSignalFragmentError);
}
var startIndex = (long)Math.Ceiling((frag.Start - waveSig.StartTime) / waveSig.SampleInterval);
var count = (long)Math.Floor((frag.End - frag.Start) / waveSig.SampleInterval / frag.DecimationFactor) + 1;
return(await myStorageEngine.GetCursorAsync <T>(waveSig.Id, new List <long> {
startIndex
}, new List <long> {
count
}, new List <long> {
frag.DecimationFactor
}));
}
/// <summary>
/// parse the fragment string,
/// "start=t1&end=t2&decimation=2" decimation is optional
/// </summary>
/// <param name="fragment"></param>
/// <returns></returns>
public static WaveFragment Parse(FixedIntervalWaveSignal waveSig, string fragment)
{
//"start=t1&end=t2&decimation=2&count=1000" decimation is optional
if (fragment.StartsWith("#"))
{
fragment = fragment.Substring(1);
}
var sections = fragment.Split(new char[] { '&' });
var result = new WaveFragment {
DecimationFactor = 1, Start = waveSig.StartTime, End = waveSig.EndTime + waveSig.SampleInterval, Count = 0
};
foreach (var sec in sections)
{
if (sec.Contains("start"))
{
result.Start = double.Parse(sec.Substring(6));
}
if (sec.Contains("end"))
{
result.End = double.Parse(sec.Substring(4)) + waveSig.SampleInterval;
}
if (sec.Contains("decimation"))
{
result.DecimationFactor = long.Parse(sec.Substring(11));
}
if (sec.Contains("count"))
{
result.Count = long.Parse(sec.Substring(6)) > 0 ? long.Parse(sec.Substring(6)) : 0;
}
}
//end smaller then start then read all
if (result.Start >= result.End)
{
result.Start = waveSig.StartTime;
result.End = waveSig.EndTime;
}
if (result.Start < waveSig.StartTime)
{
result.Start = waveSig.StartTime;
}
if (result.End > waveSig.EndTime)
{
result.End = waveSig.EndTime;
}
//calc the decimationfactor is count valid
if (result.Count > 0)
{
//todo can be optimized a little
result.DecimationFactor = (long)Math.Floor(((result.End - result.Start) / waveSig.SampleInterval + 1) / result.Count);
}
if (result.DecimationFactor < 1)
{
result.DecimationFactor = 1;
}
return(result);
}
public async Task <object> GetDataAsync(Signal signal, string fragment, string format)
{
var waveSig = signal as FixedIntervalWaveSignal;
WaveFragment frag = WaveFragment.Parse(waveSig, fragment);
var startIndex = (long)Math.Ceiling((frag.Start - waveSig.StartTime) / waveSig.SampleInterval);
var count = (long)Math.Floor((frag.End - frag.Start) / waveSig.SampleInterval / frag.DecimationFactor) + 1;
ICursor <double> myCursor = (ICursor <double>) await GetCursorAsync(signal, fragment);
// ICursor<double> myCursor = new Cursor<double>(myCoreService, signal, fragment);
List <double> resultArray = new List <double>();
//防止读时越界 review cursor 目前一次只能读1000个点？
while (myCursor.LeftPoint > 1000)
{
resultArray.AddRange(await myCursor.Read(1000));
}
if (myCursor.LeftPoint > 0)
{
resultArray.AddRange(await myCursor.Read(myCursor.LeftPoint));
}
if (format == "complex")
{
return(new FixedIntervalWaveComplex <double>
{
Title = waveSig.Path,
Start = startIndex * waveSig.SampleInterval + waveSig.StartTime,
End = waveSig.StartTime + ((count - 1) * frag.DecimationFactor + startIndex) * waveSig.SampleInterval,
Count = count,
Data = resultArray,
DecimatedSampleInterval = waveSig.SampleInterval * frag.DecimationFactor,
OrignalSampleInterval = waveSig.SampleInterval,
DecimationFactor = frag.DecimationFactor,
StartIndex = startIndex,
Unit = waveSig.Unit
});
}
else if (format == "point")
{
var points = new List <SignalPoint <double> >();
//添加中间详细点
double x = frag.Start;
foreach (var data in resultArray)
{
points.Add(new SignalPoint <double>(x, data));
x += waveSig.SampleInterval * frag.DecimationFactor;
}
return(points);
}
else
{
return(resultArray);
}
}
public async Task <ICursor> GetCursorAsync(Signal signal, string dataFragment)
{
var waveSig = signal as FixedIntervalWaveSignal;
if (waveSig == null)
{
throw new Exception(ErrorMessages.NotValidSignalError);
}
if (signal.ExtraInformation.Keys.Contains("expression"))
{
string code = (string)signal.ExtraInformation["expression"];
if (code.Contains("JDBC.Signal"))
{
MatchCollection mc = Regex.Matches(code, "(?<=JDBC.Signal\\(\").*?(?=\"\\))");
List <Match> matchList = mc.Cast <Match>().ToList();
FixedIntervalWaveSignal codeSig = (FixedIntervalWaveSignal)await myCoreService.GetOneByPathAsync(matchList.FirstOrDefault().Value);
waveSig.StartTime = codeSig.StartTime;
waveSig.EndTime = codeSig.EndTime;
waveSig.SampleInterval = codeSig.SampleInterval;
waveSig.Unit = codeSig.Unit;
await myCoreService.SaveAsync(waveSig);
}
else
{
throw new Exception(ErrorMessages.NotValidExpressionStringError);
}
}
else
{
throw new Exception(ErrorMessages.ExpressionNotFoundError);
}
WaveFragment frag = null;
try
{
frag = WaveFragment.Parse(waveSig, dataFragment);
}
catch (Exception)
{
throw new Exception(ErrorMessages.NotValidSignalFragmentError);
}
var startIndex = (long)Math.Ceiling((frag.Start - waveSig.StartTime) / waveSig.SampleInterval);
var count = (long)Math.Floor((frag.End - frag.Start) / waveSig.SampleInterval / frag.DecimationFactor) + 1;
ICursor <double> myCursor = new Cursor <double>(myCoreService, signal, new List <long> {
startIndex
}, new List <long> {
count
}, new List <long> {
frag.DecimationFactor
});
return(myCursor);
}
/// <summary>
/// format is "array"(default) or "complex"
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="signal"></param>
/// <param name="fragment">fragment: "start=t1&end=t2&decimation=2&count=1000" decimation is optional, if end is no bigger then start then return all</param>
/// <param name="format">format is "array"(default) or "complex" </param>
/// <returns></returns>
public async Task <object> GetDataAsync(Signal signal, string fragment, string format)
{
// var waveSig = signal as FixedIntervalWaveSignal<T>;
var waveSig = signal as FixedIntervalWaveSignal;
if (waveSig == null)
{
throw new Exception(ErrorMessages.NotValidSignalError);
}
WaveFragment frag = null;
try
{
frag = WaveFragment.Parse(waveSig, fragment);
}
catch (Exception)
{
throw new Exception("Fragment parse error!");
}
var startPoint = (long)Math.Ceiling((frag.Start - waveSig.StartTime) / waveSig.SampleInterval);
var count = (long)Math.Floor((frag.End - frag.Start) / waveSig.SampleInterval / frag.DecimationFactor) + 1;
// Debug.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff")+ " getCursor");
ICursor <T> cursor = await myStorageEngine.GetCursorAsync <T>(waveSig.Id, new List <long> {
startPoint
}, new List <long> {
count
}, new List <long> {
frag.DecimationFactor
});
List <T> resultArray = new List <T>();
// Debug.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff") + " getData");
//防止读时越界 review cursor 目前一次只能读1000个点？
while (cursor.LeftPoint > 1000)
{
resultArray.AddRange(await cursor.Read(1000));
}
if (cursor.LeftPoint > 0)
{
resultArray.AddRange(await cursor.Read(cursor.LeftPoint));
}
// Debug.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff") + " readFinish");
if (format == "complex")
{
return(new FixedIntervalWaveComplex <T>
{
Title = waveSig.Path,
Start = startPoint * waveSig.SampleInterval + waveSig.StartTime,
End = waveSig.StartTime + ((count - 1) * frag.DecimationFactor + startPoint) * waveSig.SampleInterval,
Count = count,
Data = resultArray,
DecimatedSampleInterval = waveSig.SampleInterval * frag.DecimationFactor,
OrignalSampleInterval = waveSig.SampleInterval,
DecimationFactor = frag.DecimationFactor,
StartIndex = startPoint,
Unit = waveSig.Unit
});
}
else if (format == "point")
{
var points = new List <SignalPoint <T> >();
//添加中间详细点
double x = frag.Start;
foreach (var data in resultArray)
{
points.Add(new SignalPoint <T>(x, data));
x += waveSig.SampleInterval * frag.DecimationFactor;
}
return(points);
}
else
{
return(resultArray);
}
}
