public override void Emit(XPathNavigator patternNavigator)
{
if (patternNavigator != null)
{
string firstOrLast = patternNavigator.SelectSingleNode("@FirstOrLast").Value;
string status = patternNavigator.SelectSingleNode("@Status").Value;
string notes = patternNavigator.SelectSingleNode("@Notes").Value;
Connection tableConnection =
Connection.GetExistingConnection(VulcanPackage, LogtainerPattern.CurrentLog.TableConnectionName);
string execSqlTaskName = LogtainerPattern.CurrentLog.LogName + Resources.Seperator + firstOrLast + Guid.NewGuid();
TemplateEmitter te = new TemplateEmitter(VulcanPackage.TemplateManager["LogSelectQuery"]);
if (
LogtainerPattern.CurrentLog.SourceColumn == null ||
LogtainerPattern.CurrentLog.DestinationColumn == null ||
LogtainerPattern.CurrentLog.TableConnectionName == null ||
LogtainerPattern.CurrentLog.Table == null)
{
Message.Trace(Severity.Error,
"Could not perform LogUpdate (On Log: {0}), Parent Logtainer does not contain all of the necessary information. Needs SourceColumn, DestinationColumn, TableConnectionName, and Table attributes.", LogtainerPattern.CurrentLog.LogName);
return;
}
te.SetNamedParameter("Source", LogtainerPattern.CurrentLog.SourceColumn);
te.SetNamedParameter("Destination", LogtainerPattern.CurrentLog.DestinationColumn);
te.SetNamedParameter("Table", LogtainerPattern.CurrentLog.Table);
te.SetNamedParameter("Status", status);
te.SetNamedParameter("Notes", notes);
te.SetNamedParameter("SourceConvertStyle", "21");
te.SetNamedParameter("DestinationConvertStyle", "21");
string query;
te.Emit(out query);
SQLTask readForLogTask = new SQLTask(VulcanPackage, execSqlTaskName, execSqlTaskName, ParentContainer, tableConnection);
readForLogTask.TransmuteToExpressionTask(String.Format("\"{0}\"", query));
readForLogTask.ExecuteSQLTask.ResultSetType = Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ResultSetType.ResultSetType_SingleRow;
DTS.Variable sourceVar = LogtainerPattern.CurrentLog[firstOrLast + "SourceRecord"];
DTS.Variable destVar = LogtainerPattern.CurrentLog[firstOrLast + "DestinationRecord"];
DTS.Variable statusVar = LogtainerPattern.CurrentLog["Status"];
DTS.Variable notesVar = LogtainerPattern.CurrentLog["Notes"];
readForLogTask.BindResult("0", sourceVar.QualifiedName);
readForLogTask.BindResult("1", destVar.QualifiedName);
readForLogTask.BindResult("2", statusVar.QualifiedName);
readForLogTask.BindResult("3", notesVar.QualifiedName);
this.FirstExecutableGeneratedByPattern = readForLogTask.SQLTaskHost;
this.LastExecutableGeneratedByPattern = this.FirstExecutableGeneratedByPattern;
}
}
public override void Emit(XPathNavigator patternNavigator)
{
if (patternNavigator != null)
{
string taskName = patternNavigator.SelectSingleNode("@Name").Value;
string connectionName = patternNavigator.SelectSingleNode("@Connection").Value;
string varPrefix = patternNavigator.SelectSingleNode("@PreviousLogEntryVariablePrefix").Value;
string sourceColumn = patternNavigator.SelectSingleNode("@SourceColumn") == null ? null : patternNavigator.SelectSingleNode("@SourceColumn").Value;
string destinationColumn = patternNavigator.SelectSingleNode("@DestinationColumn") == null ? null : patternNavigator.SelectSingleNode("@DestinationColumn").Value;
string table = patternNavigator.SelectSingleNode("@Table") == null ? null : patternNavigator.SelectSingleNode("@Table").Value;
string tableConnectionName = patternNavigator.SelectSingleNode("@TableConnection") == null ? null : patternNavigator.SelectSingleNode("@TableConnection").Value;
if (varPrefix.ToUpperInvariant() == "varLog")
{
Message.Trace(Severity.Error, "Name: {0}: Error in PreviousLogEntryVariablePrefix: varLog is a reserved variable name.", taskName);
return;
}
Connection connection =
Connection.GetExistingConnection(VulcanPackage, connectionName);
LogtainerLog ll = new LogtainerLog(
VulcanPackage,
Resources.LogVariablePrefix + VulcanPackage.Name + taskName,
sourceColumn,
destinationColumn,
table,
tableConnectionName
);
string execSqlTaskName = Resources.Log + Resources.Seperator + VulcanPackage.Name + Resources.Seperator + taskName + Resources.Seperator;
SQLTask logStartTask = new SQLTask(VulcanPackage, execSqlTaskName + Resources.Start, execSqlTaskName + Resources.Start, ParentContainer, connection);
TemplateEmitter te = new TemplateEmitter(VulcanPackage.TemplateManager["LogStart"]);
te.SetNamedParameter("ETLName", VulcanPackage.Name);
te.SetNamedParameter("TaskName", taskName);
if (_logStack.Count > 0)
{
te.SetNamedParameter("ParentLogID", "?");
// Yes you have to hard code the data type as there is no lookup or cross-reference source, and the intger is dependent on the connection you create... bugbug!
logStartTask.BindParameter(CurrentLog.LogVariable, Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Input, 3);
}
else
{
te.SetNamedParameter("ParentLogID", "NULL");
}
logStartTask.BindParameter(ll.LogVariable, Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output, 3);
logStartTask.BindParameter(ll.LastRecordLogVariable, Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output, 3);
logStartTask.BindParameter(ll.IsAnotherInstanceCurrentlyRunningLogVariable, Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output, 3);
string sqlExpression;
te.Emit(out sqlExpression);
logStartTask.TransmuteToExpressionTask(sqlExpression);
te = new TemplateEmitter(VulcanPackage.TemplateManager["LogGetValue"]);
te.SetNamedParameter("LogID", ll.LastRecordLogVariable.QualifiedName);
this.FirstExecutableGeneratedByPattern = logStartTask.SQLTaskHost;
// Push the current log variable onto the stack!
_logStack.Push(ll);
//Add a new SQL Task to read the previous log
te = new TemplateEmitter("LogGetValue", VulcanPackage, ll.LastRecordLogVariable.QualifiedName);
string readPreviousLogValuesQuery;
te.Emit(out readPreviousLogValuesQuery);
SQLTask readPreviousLogValues = new SQLTask(VulcanPackage, Resources.Log + Resources.LoadInto + varPrefix, Resources.Log + Resources.LoadInto + varPrefix, ParentContainer, connection);
readPreviousLogValues.TransmuteToExpressionTask(readPreviousLogValuesQuery);
VulcanPackage.AddPrecedenceConstraint(this.FirstExecutableGeneratedByPattern, readPreviousLogValues.SQLTaskHost, ParentContainer);
//Bind and create variables for the SQL Task that reads the previous log. This is kinda hacky
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "StartTime", new DateTime(1980, 1, 1)),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.DBTimeStamp,
255);
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "EndTime", new DateTime(1980, 1, 1)),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.DBTimeStamp,
255);
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "FirstSourceRecord", String.Empty),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.WChar,
255);
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "FirstDestinationRecord", String.Empty),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.WChar,
255);
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "LastSourceRecord", String.Empty),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.WChar,
255);
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "LastDestinationRecord", String.Empty),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.WChar,
255);
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "Status", String.Empty),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.WChar,
255);
readPreviousLogValues.BindParameter(
VulcanPackage.AddVariable(varPrefix + "Notes", String.Empty),
Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Output,
(int)System.Data.OleDb.OleDbType.WChar,
255);
// Handle the sub-tasks just like the Container pattern
DTS.Executable previousExec = readPreviousLogValues.SQLTaskHost;
Pattern p = null;
foreach (XPathNavigator nav in patternNavigator.SelectChildren(XPathNodeType.Element))
{
p = PatternFactory.ProcessPattern(VulcanPackage, ParentContainer, nav, p);
VulcanPackage.AddPrecedenceConstraint(previousExec, p.FirstExecutableGeneratedByPattern, ParentContainer);
previousExec = p.LastExecutableGeneratedByPattern;
}
this.LastExecutableGeneratedByPattern = previousExec;
// Pop the current log variable off of the stack and end the log.
ll = _logStack.Pop();
te = new TemplateEmitter(VulcanPackage.TemplateManager["LogSetValue"]);
te.SetNamedParameter("LogID", ll.LogVariable.QualifiedName);
StringBuilder writeValuesToLogQuery = new StringBuilder();
foreach (string column in ll.LogColumnDictionary.Keys)
{
string temp;
te.SetNamedParameter("Column", column);
te.SetNamedParameter("Value", ll.LogColumnDictionary[column].QualifiedName);
te.Emit(out temp);
writeValuesToLogQuery.Append(temp);
writeValuesToLogQuery.AppendFormat(" + \n");
}
te = new TemplateEmitter(VulcanPackage.TemplateManager["LogEnd"]);
te.Emit(out sqlExpression);
writeValuesToLogQuery.Append(sqlExpression);
SQLTask logEndTask = new SQLTask(VulcanPackage, execSqlTaskName + Resources.Stop, execSqlTaskName + Resources.Stop, ParentContainer, connection);
logEndTask.TransmuteToExpressionTask(writeValuesToLogQuery.ToString());
logEndTask.BindParameter(ll.LogVariable, Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ParameterDirections.Input, 3);
if (previousExec != null)
{
VulcanPackage.AddPrecedenceConstraint(previousExec, logEndTask.SQLTaskHost, ParentContainer);
}
this.LastExecutableGeneratedByPattern = logEndTask.SQLTaskHost;
}
}
public VulcanConfig XmlTemplateReplacement(VulcanConfig vulcanConfig)
{
List <XPathNavigator> nodeList = new List <XPathNavigator>();
VulcanConfig vc = vulcanConfig;
foreach (XPathNavigator node in vc.Navigator.SelectDescendants(XPathNodeType.Element, true))
{
if (node.XmlType != null && node.XmlType.Name != null)
{
if (node.XmlType.Name.ToUpperInvariant().Contains("TEMPLATEXML"))
{
nodeList.Add(node);
}
}
}
foreach (XPathNavigator node in nodeList)
{
XPathNavigator nameNode = node.SelectSingleNode("@Name");
string templateName = nameNode.Value;
nameNode.DeleteSelf();
Message.Trace(Severity.Debug, "Replacing Template {0}", node.OuterXml);
if (this.templateDictionary.ContainsKey(templateName))
{
Template t = this[templateName];
TemplateEmitter te = new TemplateEmitter(t);
int parameterCount = 0;
if (node.MoveToFirstAttribute())
{
do
{
parameterCount++;
Message.Trace(Severity.Debug, "Mapping Parameter {0}={1}", node.Name, node.Value);
te.SetNamedParameter(node.Name, node.Value);
} while (node.MoveToNextAttribute());
}
if (parameterCount == t.MapDictionary.Keys.Count)
{
string newXml;
te.Emit(out newXml);
if (parameterCount > 0)
{
node.MoveToParent();
}
Message.Trace(Severity.Debug, "Old Node: {0}", node.OuterXml);
node.OuterXml = newXml;
Message.Trace(Severity.Debug, "New Node: {0}", node.OuterXml);
}
else
{
Message.Trace(Severity.Error, "Template parameters do not match up. Contains {0} but the template requires {1}", parameterCount, t.MapDictionary.Keys.Count);
}
}
else
{
Message.Trace(Severity.Error, "Invalid template {0}", templateName);
}
}
string savePath = vc.Save();
Message.Trace(Severity.Notification, "Saved new VulcanConfig to {0}", savePath);
vc = new VulcanConfig(savePath);
return(vc);
}
