private RemoteFetchData InternalFetch(Schema.IRowType rowType, Guid[] bookmarks, int count, bool skipCurrent)
{
Row[] rows = new Row[Math.Abs(count)];
try
{
for (int index = 0; index < rows.Length; index++)
{
rows[index] = new Row(_plan.Process.ServerProcess.ValueManager, rowType);
rows[index].ValuesOwned = false;
}
CursorGetFlags flags;
int localCount = _serverCursor.Fetch(rows, bookmarks, count, skipCurrent, out flags);
RemoteFetchData fetchData = new RemoteFetchData();
fetchData.Body = new RemoteRowBody[localCount];
for (int index = 0; index < localCount; index++)
{
fetchData.Body[index].Data = rows[index].AsPhysical;
}
fetchData.Flags = flags;
return(fetchData);
}
finally
{
for (int index = 0; index < rows.Length; index++)
{
if (rows[index] != null)
{
rows[index].Dispose();
}
}
}
}
// OpenCursor
public IRemoteServerCursor OpenCursor
(
string expression,
ref RemoteParamData paramsValue,
out IRemoteServerExpressionPlan plan,
out PlanDescriptor planDescriptor,
out ProgramStatistics executeTime,
ProcessCallInfo callInfo,
RemoteProcessCleanupInfo cleanupInfo,
out Guid[] bookmarks,
int count,
out RemoteFetchData fetchData
)
{
ProcessCallInfo(callInfo);
plan = PrepareExpression(expression, paramsValue.Params, null, out planDescriptor, cleanupInfo);
try
{
IRemoteServerCursor cursor = plan.Open(ref paramsValue, out executeTime, EmptyCallInfo());
fetchData = cursor.Fetch(out bookmarks, count, true, EmptyCallInfo());
return(cursor);
}
catch
{
UnprepareExpression(plan);
plan = null;
throw;
}
}
protected void SourceFetch(bool isFirst, bool skipCurrent)
{
// Execute fetch on the remote cursor, selecting all columns, requesting FFetchCount rows from the current position
Guid[] bookmarks;
RemoteFetchData fetchData = _cursor.Fetch(out bookmarks, _fetchCount * (int)_bufferDirection, skipCurrent, _plan._process.GetProcessCallInfo());
ProcessFetchData(fetchData, bookmarks, isFirst);
_plan._programStatisticsCached = false;
}
public rrd4n.DataAccess.Data.FetchData GetData(rrd4n.DataAccess.Data.FetchRequest request)
{
RrdServerInterface remoteAccessor = GetServerAccessor();
RemoteFetchData remoteData = remoteAccessor.FetchData(request.DatabasePath, request.FetchStart, request.FetchEnd,
request.ConsolidateFunctionName, request.Resolution);
rrd4n.DataAccess.Data.FetchData localData = new rrd4n.DataAccess.Data.FetchData(remoteData.ArchiveSteps,
remoteData.ArchiveEndTimeTicks, remoteData.DatasourceNames);
localData.Timestamps = remoteData.Timestamps;
localData.Values = remoteData.Values;
return(localData);
}
public RemoteFetchData FetchData(string databaseName, long startTimeTick, long endTimeTick, string consolFunctionName, long resolution)
{
RrdDb database = null;
try
{
log.DebugFormat("Read data from {0}", databaseName);
var nameValueCollection = (NameValueCollection)ConfigurationManager.GetSection("rrdbfileserver");
string dataBasePath = nameValueCollection["databasepath"];
log.DebugFormat("Database path:{0}", dataBasePath + databaseName);
database = new RrdDb(dataBasePath + databaseName, true);
FetchRequest fetchRequest = new FetchRequest(null, consolFunctionName, startTimeTick, endTimeTick, resolution);
FetchData data = database.fetchData(fetchRequest);
database.close();
RemoteFetchData remoteData = new RemoteFetchData();
remoteData.Timestamps = data.getTimestamps();
remoteData.Values = data.getValues();
remoteData.ArchiveEndTimeTicks = data.getArcEndTime();
remoteData.ArchiveSteps = data.getArcStep();
remoteData.DatasourceNames = data.getDsNames();
if (debugEnabled)
{
log.DebugFormat("Read data from {0} to {1}.", rrd4n.Common.Util.getDate(startTimeTick), rrd4n.Common.Util.getDate(endTimeTick));
}
return(remoteData);
}
catch (Exception ex)
{
log.Error("Fetchdata exception", ex);
throw;
}
finally
{
if (database != null)
{
database.close();
}
}
}
public IRemoteServerCursor Open(ref RemoteParamData paramsValue, out ProgramStatistics executeTime, out Guid[] bookmarks, int count, out RemoteFetchData fetchData, ProcessCallInfo callInfo)
{
IRemoteServerCursor serverCursor = Open(ref paramsValue, out executeTime, callInfo);
fetchData = serverCursor.Fetch(out bookmarks, count, true, _process.EmptyCallInfo());
return(serverCursor);
}
public IRemoteServerCursor OpenCursor(string expression, ref RemoteParamData paramsValue, out IRemoteServerExpressionPlan plan, out PlanDescriptor planDescriptor, out ProgramStatistics executeTime, ProcessCallInfo callInfo, RemoteProcessCleanupInfo cleanupInfo, out Guid[] bookmarks, int count, out RemoteFetchData fetchData)
{
try
{
var channel = GetServiceInterface();
IAsyncResult result = channel.BeginOpenCursorWithFetch(ProcessHandle, GetCleanupInfo(cleanupInfo), callInfo, expression, paramsValue, count, null, null);
result.AsyncWaitHandle.WaitOne();
DirectCursorWithFetchResult cursorResult = channel.EndOpenCursorWithFetch(result);
paramsValue.Data = cursorResult.ParamData;
planDescriptor = cursorResult.PlanDescriptor;
executeTime = cursorResult.ExecuteTime;
bookmarks = cursorResult.Bookmarks;
fetchData = cursorResult.FetchData;
plan = new ClientExpressionPlan(this, planDescriptor);
return(new ClientCursor((ClientExpressionPlan)plan, cursorResult.CursorDescriptor));
}
catch (FaultException <DataphorFault> fault)
{
throw DataphorFaultUtility.FaultToException(fault.Detail);
}
catch (CommunicationException ce)
{
ReportCommunicationError();
throw new ServerException(ServerException.Codes.CommunicationFailure, ErrorSeverity.Environment, ce);
}
}
public void ProcessFetchData(RemoteFetchData fetchData, Guid[] bookmarks, bool isFirst)
{
_buffer.BufferDirection = _bufferDirection;
Schema.IRowType rowType = DataType.RowType;
if (_bufferDirection == BufferDirection.Forward)
{
for (int index = 0; index < fetchData.Body.Length; index++)
{
LocalRow row = new LocalRow(new Row(_plan._process.ValueManager, rowType), bookmarks[index]);
row.Row.AsPhysical = fetchData.Body[index].Data;
_buffer.Add(row);
AddBookmarkIfNotEmpty(bookmarks[index]);
}
if ((fetchData.Body.Length > 0) && !isFirst)
{
_bufferIndex = 0;
}
else
{
_bufferIndex = -1;
}
if ((fetchData.Flags & CursorGetFlags.EOF) != 0)
{
_sourceCursorIndex = _buffer.Count;
}
else
{
_sourceCursorIndex = _buffer.Count - 1;
}
}
else
{
for (int index = 0; index < fetchData.Body.Length; index++)
{
LocalRow row = new LocalRow(new Row(_plan._process.ValueManager, rowType), bookmarks[index]);
row.Row.AsPhysical = fetchData.Body[index].Data;
_buffer.Insert(0, row);
AddBookmarkIfNotEmpty(bookmarks[index]);
}
if ((fetchData.Body.Length > 0) && !isFirst)
{
_bufferIndex = _buffer.Count - 1;
}
else
{
_bufferIndex = _buffer.Count;
}
if ((fetchData.Flags & CursorGetFlags.BOF) != 0)
{
_sourceCursorIndex = -1;
}
else
{
_sourceCursorIndex = 0;
}
}
SetFlags(fetchData.Flags);
_bufferFull = true;
}
public IRemoteServerCursor Open(ref RemoteParamData paramsValue, out ProgramStatistics executeTime, out Guid[] bookmarks, int count, out RemoteFetchData fetchData, ProcessCallInfo callInfo)
{
try
{
var channel = GetServiceInterface();
IAsyncResult result = channel.BeginOpenPlanCursorWithFetch(PlanHandle, callInfo, paramsValue, count, null, null);
result.AsyncWaitHandle.WaitOne();
CursorWithFetchResult cursorResult = channel.EndOpenPlanCursorWithFetch(result);
executeTime = cursorResult.ExecuteTime;
_programStatistics = executeTime;
paramsValue.Data = cursorResult.ParamData;
bookmarks = cursorResult.Bookmarks;
fetchData = cursorResult.FetchData;
return(new ClientCursor(this, cursorResult.CursorDescriptor));
}
catch (FaultException <DataphorFault> fault)
{
throw DataphorFaultUtility.FaultToException(fault.Detail);
}
catch (CommunicationException ce)
{
ReportCommunicationError();
throw new ServerException(ServerException.Codes.CommunicationFailure, ErrorSeverity.Environment, ce);
}
}
