public async Task <ICursor <T> > GetCursorAsync <T>(Guid signalId)
{
myCoreService = CoreService.GetInstance();
var signal = await myCoreService.GetOneByIdAsync(signalId);
int sampleCount = (int)signal.NumberOfSamples;
List <IPage <SEPayload> > listIPage = new List <IPage <SEPayload> >();
List <long> dimPage = new List <long>();
Byte[] pagingState = null;
Cql cql = Cql.New("SELECT * FROM sepayload where parentid=?", signalId);
IPage <SEPayload> ipagePartialList = (await mapper.FetchPageAsync <SEPayload>(cql.WithOptions(opt => opt.SetPageSize(pagesize).SetPagingState(pagingState))));
listIPage.Add(ipagePartialList);
while (ipagePartialList.PagingState != null)
{
pagingState = ipagePartialList.PagingState;
ipagePartialList = (await mapper.FetchPageAsync <SEPayload>(cql.WithOptions(opt => opt.SetPageSize(pagesize).SetPagingState(pagingState))));
if (ipagePartialList.Count() > 0)
{
listIPage.Add(ipagePartialList);
}
}
long dimPageCount = listIPage.Count() - dimPage.Sum();
dimPage.Add(dimPageCount);
Cursor <T> jdbccursor = new Cursor <T>(listIPage);
return(jdbccursor);
}
public async Task <ICursor <T> > GetCursorAsync <T>(Guid signalId, List <long> start, List <long> count, List <long> decimationFactor = null)
{
List <IPage <SEPayload> > listIPage = new List <IPage <SEPayload> >();
long queryStart = start.LastOrDefault();
long queryEnd;
if (decimationFactor == null)
{
decimationFactor = new List <long>();
for (int i = 0; i < start.Count; i++)
{
decimationFactor.Add(1);
}
queryEnd = queryStart + count.LastOrDefault();
}
else
{
queryEnd = queryStart + decimationFactor.LastOrDefault() * (count.LastOrDefault() - 1);
}
long num = count.LastOrDefault();
long factor = decimationFactor[decimationFactor.Count() - 1];
//from the second lowest rank find each line to read
long lineCount = 1;
//how many lines to read
for (int i = 0; i < count.Count - 1; i++)
{
lineCount = lineCount * count[i];
}
List <long> lineCursor = new List <long>(start.Count - 1);
List <long> lineCounter = new List <long>(start.Count - 1);
//the line cursor has every but last rank of the start point, point to the start line
lineCursor.AddRange(start.Where((v, i) => i < start.Count - 1));
lineCounter.AddRange(count.Where((v, i) => i < count.Count - 1));
List <long> dimPage = new List <long>();
for (long line = 0; line < lineCount; line++)
{
#region
Byte[] pagingState = null;
string dimension = DimensionsToText(lineCursor);
Cql cql = Cql.New("SELECT * FROM sepayload where parentid=? and dimensions=? and start<=? ", signalId, dimension, queryEnd);
// Cql cql = Cql.New("SELECT * FROM sepayload where parentid=? and dimensions=? ", signalId, dimension);
IPage <SEPayload> ipagePartialList = (await mapper.FetchPageAsync <SEPayload>(cql.WithOptions(opt => opt.SetPageSize(pagesize).SetPagingState(pagingState))));
listIPage.Add(ipagePartialList);
while (ipagePartialList.PagingState != null)
{
pagingState = ipagePartialList.PagingState;
ipagePartialList = (await mapper.FetchPageAsync <SEPayload>(cql.WithOptions(opt => opt.SetPageSize(pagesize).SetPagingState(pagingState))));
if (ipagePartialList.Count() > 0)
{
listIPage.Add(ipagePartialList);
}
}
long dimPageCount = listIPage.Count() - dimPage.Sum();
dimPage.Add(dimPageCount);
/***************************************/
#endregion
for (var rankIndex = lineCursor.Count - 1; rankIndex >= 0; rankIndex--)
{
//try read next line
lineCounter[rankIndex] -= 1;
if (lineCounter[rankIndex] == 0)
{
lineCounter[rankIndex] = count[rankIndex];
lineCursor[rankIndex] = start[rankIndex];
}
else
{
//move this rank forward
lineCursor[rankIndex] += decimationFactor[rankIndex];
break;
}
}
}
Cursor <T> jdbccursor = new Cursor <T>(listIPage, start.LastOrDefault(), count, dimPage, decimationFactor.LastOrDefault());
return(jdbccursor);
}
public async Task <ICursor <T> > GetCursorAsync <T>(Guid signalId, List <long> start, List <long> count, List <long> decimationFactor = null)
{
myCoreService = CoreService.GetInstance();
var signal = await myCoreService.GetOneByIdAsync(signalId);
int sampleCount = (int)signal.NumberOfSamples;
int indexStart = (int)start.LastOrDefault();
int getNumber = (int)count.LastOrDefault();
List <IPage <SEPayload> > listIPage = new List <IPage <SEPayload> >();
if (decimationFactor == null)
{
decimationFactor = new List <long>();
for (int i = 0; i < start.Count; i++)
{
decimationFactor.Add(1);
}
}
int factor = (int)decimationFactor[decimationFactor.Count() - 1];
//from the second lowest rank find each line to read
long lineCount = 1;
//how many lines to read
for (int i = 0; i < count.Count - 1; i++)
{
lineCount = lineCount * count[i];
}
List <long> lineCursor = new List <long>(start.Count - 1);
List <long> lineCounter = new List <long>(start.Count - 1);
//the line cursor has every but last rank of the start point, point to the start line
lineCursor.AddRange(start.Where((v, i) => i < start.Count - 1));
lineCounter.AddRange(count.Where((v, i) => i < count.Count - 1));
List <long> dimPage = new List <long>();
List <long> indexes = new List <long>();
for (int line = 0; line < lineCount; line++)
{
#region
Byte[] pagingState = null;
string dimension = DimensionsToText(lineCursor);
//计算index
if (factor < sampleCount)
{
var lastPoint = (factor * getNumber + indexStart) - factor;
var lastIndex = lastPoint / sampleCount + 1;
var firstIndex = indexStart / sampleCount;
for (int i = firstIndex; i < lastIndex; i++)
{
indexes.Add(i);
}
}
else
{
int coordinate = 0;
int variable = 0;
//每个点取一次比较
for (int i = 0; i < getNumber; i++)
{
coordinate = indexStart + i * factor;
variable = coordinate / sampleCount;
indexes.Add(variable);
}
}
//
Cql cql = Cql.New("SELECT * FROM sepayload where parentid=? and dimensions=? and indexes in ? ", signalId, dimension, indexes);
IPage <SEPayload> ipagePartialList = (await mapper.FetchPageAsync <SEPayload>(cql.WithOptions(opt => opt.SetPageSize(pagesize).SetPagingState(pagingState))));
// Debug.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff")+ " getPAge");
if (ipagePartialList.Count == 0)
{
throw new Exception(ErrorMessages.DataNotFoundError);
}
listIPage.Add(ipagePartialList);
while (ipagePartialList.PagingState != null)
{
pagingState = ipagePartialList.PagingState;
ipagePartialList = (await mapper.FetchPageAsync <SEPayload>(cql.WithOptions(opt => opt.SetPageSize(pagesize).SetPagingState(pagingState))));
if (ipagePartialList.Count() > 0)
{
listIPage.Add(ipagePartialList);
}
}
long dimPageCount = listIPage.Count() - dimPage.Sum();
dimPage.Add(dimPageCount);
/***************************************/
#endregion
for (var rankIndex = lineCursor.Count - 1; rankIndex >= 0; rankIndex--)
{
//try read next line
lineCounter[rankIndex] -= 1;
if (lineCounter[rankIndex] == 0)
{
lineCounter[rankIndex] = count[rankIndex];
lineCursor[rankIndex] = start[rankIndex];
}
else
{
//move this rank forward
lineCursor[rankIndex] += decimationFactor[rankIndex];
break;
}
}
}
Cursor <T> jdbccursor = new Cursor <T>(listIPage, start.LastOrDefault(), count, dimPage, sampleCount, decimationFactor.LastOrDefault());
return(jdbccursor);
}
