/// <summary>
/// Fetch
/// </summary>
/// <returns></returns>
internal GatewayResult CursorFetch()
{
//vew_fetch_rng
GatewayCommandBase cursorCommand = GatewayCommandsFactory.CreateCursorFetchCommand(CurrentCursor, LocalDataviewManager.LocalManager);
return(cursorCommand.Execute());
}
/// <summary>
/// Fetech the values from source datasource, convert fetched values and insert values in destination dataSource.
/// </summary>
/// <param name="fromDataSourceDefinition"></param>
/// <param name="toDataSourceDefinition"></param>
private void ConvertAndInsertValues(DataSourceDefinition fromDataSourceDefinition, DataSourceDefinition toDataSourceDefinition)
{
GatewayResult result = null;
MainCursorBuilder cursorBuilder = new MainCursorBuilder(null);
RuntimeCursor fromRuntimeCursor = cursorBuilder.Build(fromDataSourceDefinition, Access.Read);
RuntimeCursor toRuntimeCursor = cursorBuilder.Build(toDataSourceDefinition, Access.Write);
//Prepare and open source and destnation runtime cursor.
PrepareAndOpenCursor(fromRuntimeCursor, true);
PrepareAndOpenCursor(toRuntimeCursor, false);
//Create fetch command
GatewayCommandFetch fetchCommand = GatewayCommandsFactory.CreateCursorFetchCommand(fromRuntimeCursor, ClientManager.Instance.LocalManager);
while (true)
{
//Fetch record from source table
result = fetchCommand.Execute();
if (!result.Success)
{
if (result.ErrorCode == GatewayErrorCode.NoRecord)
{
break;
}
else
{
throw new DataSourceConversionFailedException(fromDataSourceDefinition.Name, result.ErrorDescription);
}
}
//Convert values of fields of source table.
ConvertFields(fromDataSourceDefinition, toDataSourceDefinition, fromRuntimeCursor.RuntimeCursorData.CurrentValues, toRuntimeCursor.RuntimeCursorData.CurrentValues);
for (int i = 0; i < toDataSourceDefinition.Fields.Count; i++)
{
toRuntimeCursor.CursorDefinition.IsFieldUpdated[i] = true;
}
//Insert converted values into temporary table.
result = GatewayCommandsFactory.CreateCursorInsertCommand(toRuntimeCursor, ClientManager.Instance.LocalManager).Execute();
}
// release and close source and destnation runtime cursor.
ReleaseAndCloseCursor(fromRuntimeCursor, true);
ReleaseAndCloseCursor(toRuntimeCursor, false);
}
/// <summary>
/// Update dataview to DataSource.
/// </summary>
private ReturnResultBase UpdateDataViewToDataSource()
{
bool transactionOpened = false;
string error = string.Empty;
string dataSourceName = ClientManager.Instance.getEnvParamsTable().translate(updateDataViewToDataSourceCommand.DestDataSourceName);
if (string.IsNullOrEmpty(dataSourceName))
{
dataSourceName = destinationDataSourceDefinition.Name;
}
GatewayResult result = GatewayCommandsFactory.CreateFileExistCommand(dataSourceName, destinationDataSourceDefinition, ClientManager.Instance.LocalManager).Execute();
bool insertMode = !result.Success;
if (!insertMode)
{
uniqueKey = GetUniqueKey();
if (uniqueKey == null)
{
error = "DataViewToDataSource - When using the DataViewtoDataSource function, a unique index must be defined in the destination data source .";
Logger.Instance.WriteExceptionToLog(error);
ClientManager.Instance.ErrorToBeWrittenInServerLog = error;
return(new ReturnResult(MsgInterface.STR_DATAVIEW_TO_DATASOURCE_OPERATION_FAILED));
}
else if (!CheckDestinationColumnListContainUniqueKeyColumns())
{
error = "DataViewToDataSource - When using the DataViewtoDataSource function, all the segments of the unique index must be selected.";
Logger.Instance.WriteExceptionToLog(error);
ClientManager.Instance.ErrorToBeWrittenInServerLog = error;
return(new ReturnResult(MsgInterface.STR_DATAVIEW_TO_DATASOURCE_OPERATION_FAILED));
}
}
result = GatewayCommandsFactory.CreateFileOpenCommand(dataSourceName, destinationDataSourceDefinition, Access.Write, ClientManager.Instance.LocalManager).Execute();
if (result.Success)
{
//Build the runtime cursor.
MainCursorBuilder cursorBuilder = new MainCursorBuilder(null);
RuntimeCursor destinationRuntimeCursor = cursorBuilder.Build(destinationDataSourceDefinition, Access.Write);
destinationRuntimeCursor.CursorDefinition.StartPosition = new DbPos(true);
destinationRuntimeCursor.CursorDefinition.CurrentPosition = new DbPos(true);
// Prepare the cursor.
result = GatewayCommandsFactory.CreateCursorPrepareCommand(destinationRuntimeCursor, ClientManager.Instance.LocalManager).Execute();
if (result.Success)
{
//If tansaction is not open then open the transaction.
if (TaskTransactionManager.LocalOpenedTransactionsCount == 0)
{
result = GatewayCommandsFactory.CreateGatewayCommandOpenTransaction(ClientManager.Instance.LocalManager).Execute();
transactionOpened = true;
}
if (result.Success)
{
SetDataToRuntimeParser();
RecordForDataViewToDataSource record = GetRecord();
while (record != null)
{
BuildCurrentValues(destinationRuntimeCursor, record);
result = GatewayCommandsFactory.CreateCursorInsertCommand(destinationRuntimeCursor, ClientManager.Instance.LocalManager, true).Execute();
if (!result.Success)
{
if (result.ErrorCode == GatewayErrorCode.DuplicateKey)
{
if (!insertMode)
{
//Build the ranges using unique key segments value.
BuildRanges(record, destinationRuntimeCursor);
//Open the cursor and apply the ranges.
result = GatewayCommandsFactory.CreateCursorOpenCommand(destinationRuntimeCursor, ClientManager.Instance.LocalManager, true).Execute();
if (result.Success)
{
//Fetch the record
result = GatewayCommandsFactory.CreateCursorFetchCommand(destinationRuntimeCursor, ClientManager.Instance.LocalManager).Execute();
BuildCurrentValues(destinationRuntimeCursor, record);
//If record found, that means record with same key value exists, so update the current record with destination record.
if (result.Success)
{
result = GatewayCommandsFactory.CreateGatewayCommandCursorUpdateRecord(destinationRuntimeCursor, ClientManager.Instance.LocalManager, true).Execute();
}
else
{
if (!string.IsNullOrEmpty(ClientManager.Instance.ErrorToBeWrittenInServerLog))
{
ClientManager.Instance.ErrorToBeWrittenInServerLog += "\r\n";
}
ClientManager.Instance.ErrorToBeWrittenInServerLog += result.ErrorDescription;
}
//Close the cursor.
GatewayCommandsFactory.CreateCursorCloseCommand(destinationRuntimeCursor, ClientManager.Instance.LocalManager).Execute();
}
else
{
if (!string.IsNullOrEmpty(ClientManager.Instance.ErrorToBeWrittenInServerLog))
{
ClientManager.Instance.ErrorToBeWrittenInServerLog += "\r\n";
}
ClientManager.Instance.ErrorToBeWrittenInServerLog += result.ErrorDescription;
}
}
else
{
if (!string.IsNullOrEmpty(ClientManager.Instance.ErrorToBeWrittenInServerLog))
{
ClientManager.Instance.ErrorToBeWrittenInServerLog += "\r\n";
}
ClientManager.Instance.ErrorToBeWrittenInServerLog += result.ErrorDescription;
record = GetRecord();
continue;
}
}
else
{
if (!string.IsNullOrEmpty(ClientManager.Instance.ErrorToBeWrittenInServerLog))
{
ClientManager.Instance.ErrorToBeWrittenInServerLog += "\r\n";
}
ClientManager.Instance.ErrorToBeWrittenInServerLog += result.ErrorDescription;
break;
}
}
record = GetRecord();
}
//If transaction is opened , then close the transaction. If any error occurs then abort the transation else do commit.
if (transactionOpened)
{
GatewayCommandCloseTransaction closeTransactionCommand = GatewayCommandsFactory.CreateGatewayCommandCloseTransaction(ClientManager.Instance.LocalManager);
if (result.Success)
{
closeTransactionCommand.TransactionModes = TransactionModes.Commit;
}
else
{
closeTransactionCommand.TransactionModes = TransactionModes.Abort;
}
closeTransactionCommand.Execute();
}
//Release the cursor and close the file.
GatewayCommandsFactory.CreateCursorReleaseCommand(destinationRuntimeCursor, ClientManager.Instance.LocalManager).Execute();
GatewayCommandsFactory.CreateFileCloseCommand(destinationDataSourceDefinition, ClientManager.Instance.LocalManager).Execute();
}
else
{
ClientManager.Instance.ErrorToBeWrittenInServerLog = result.ErrorDescription;
}
}
else
{
ClientManager.Instance.ErrorToBeWrittenInServerLog = result.ErrorDescription;
}
}
else
{
ClientManager.Instance.ErrorToBeWrittenInServerLog = result.ErrorDescription;
}
return(result);
}