private Schema.IRowType GetRowType(RemoteRowHeader header)
{
Schema.IRowType rowType = new Schema.RowType();
for (int index = 0; index < header.Columns.Length; index++)
{
rowType.Columns.Add(_serverCursor.SourceRowType.Columns[header.Columns[index]].Copy());
}
return(rowType);
}
/// <summary> Returns the requested number of rows from the cursor. </summary>
/// <param name="header"> A <see cref="RemoteRowHeader"/> structure containing the columns to be returned. </param>
/// <param name='count'> The number of rows to fetch, with a negative number indicating backwards movement. </param>
/// <returns> A <see cref="RemoteFetchData"/> structure containing the result of the fetch. </returns>
public RemoteFetchData Fetch(RemoteRowHeader header, out Guid[] bookmarks, int count, bool skipCurrent, ProcessCallInfo callInfo)
{
_plan.Process.ProcessCallInfo(callInfo);
try
{
bookmarks = new Guid[Math.Abs(count)];
return(InternalFetch(GetRowType(header), bookmarks, count, skipCurrent));
}
catch (Exception E)
{
throw WrapException(E);
}
}
private void SourceSelect(IRow row)
{
RemoteRowHeader header = new RemoteRowHeader();
header.Columns = new string[row.DataType.Columns.Count];
for (int index = 0; index < row.DataType.Columns.Count; index++)
{
header.Columns[index] = row.DataType.Columns[index].Name;
}
row.ValuesOwned = false;
byte[] AData = _cursor.Select(header, _plan._process.GetProcessCallInfo()).Data;
row.AsPhysical = AData;
_plan._programStatisticsCached = false;
}
public RemoteRowBody Select(RemoteRowHeader header, ProcessCallInfo callInfo)
{
try
{
var channel = GetServiceInterface();
IAsyncResult result = channel.BeginSelectSpecific(CursorHandle, callInfo, header, null, null);
result.AsyncWaitHandle.WaitOne();
return(channel.EndSelectSpecific(result));
}
catch (FaultException <DataphorFault> fault)
{
throw DataphorFaultUtility.FaultToException(fault.Detail);
}
catch (CommunicationException ce)
{
ReportCommunicationError();
throw new ServerException(ServerException.Codes.CommunicationFailure, ErrorSeverity.Environment, ce);
}
}
public RemoteFetchData Fetch(RemoteRowHeader header, out Guid[] bookmarks, int count, bool skipCurrent, ProcessCallInfo callInfo)
{
try
{
var channel = GetServiceInterface();
IAsyncResult result = channel.BeginFetchSpecific(CursorHandle, callInfo, header, count, skipCurrent, null, null);
result.AsyncWaitHandle.WaitOne();
FetchResult fetchResult = channel.EndFetchSpecific(result);
bookmarks = fetchResult.Bookmarks;
return(fetchResult.FetchData);
}
catch (FaultException <DataphorFault> fault)
{
throw DataphorFaultUtility.FaultToException(fault.Detail);
}
catch (CommunicationException ce)
{
ReportCommunicationError();
throw new ServerException(ServerException.Codes.CommunicationFailure, ErrorSeverity.Environment, ce);
}
}
// IRemoteServerCursor
/// <summary> Returns the current row of the cursor. </summary>
/// <param name="header"> A <see cref="RemoteRowHeader"/> structure containing the columns to be returned. </param>
/// <returns> A <see cref="RemoteRowBody"/> structure containing the row information. </returns>
public RemoteRowBody Select(RemoteRowHeader header, ProcessCallInfo callInfo)
{
_plan.Process.ProcessCallInfo(callInfo);
try
{
Row row = new Row(_plan.Process.ServerProcess.ValueManager, GetRowType(header));
try
{
row.ValuesOwned = false;
_serverCursor.Select(row);
RemoteRowBody body = new RemoteRowBody();
body.Data = row.AsPhysical;
return(body);
}
finally
{
row.Dispose();
}
}
catch (Exception E)
{
throw WrapException(E);
}
}
