public ChangeRecordDetail GetChangeRecords(UDDI.Replication.GetChangeRecords message)
{
//
// Log more information than for a usual message to help diagnose possible replication errors.
//
StartOperatorMessageLog("GetChangeRecords", message);
//Debug.Enter();
Debug.VerifySetting("OperatorKey");
//
// Make sure the request is allowed by the communication graph.
//
ControlledMessage.Test(message.RequestingNode,
Config.GetString("OperatorKey"),
MessageType.GetChangeRecords);
//
// Retrieve the change records.
//
ChangeRecordDetail detail = new ChangeRecordDetail();
try
{
detail = message.Get();
EndOperatorMessageLog("GetChangeRecords", detail);
}
catch (Exception e)
{
DispositionReport.Throw(e);
EndOperatorMessageLog("GetChangeRecords", e);
}
//Debug.Leave();
return(detail);
}
/// ****************************************************************
/// public Get
/// ----------------------------------------------------------------
/// <summary>
/// </summary>
/// ****************************************************************
///
public ChangeRecordDetail Get()
{
Debug.VerifySetting("OperatorKey");
ChangeRecordDetail detail = new ChangeRecordDetail();
try
{
//
// Get the list of known operators.
//
StringCollection operators = new StringCollection();
SqlStoredProcedureAccessor sp = new SqlStoredProcedureAccessor();
sp.ProcedureName = "net_operators_get";
SqlDataReaderAccessor reader = sp.ExecuteReader();
try
{
while (reader.Read())
{
operators.Add(reader.GetGuidString("operatorKey"));
}
}
finally
{
reader.Close();
}
//
// Set the search criteria for change records.
//
foreach (string operatorKey in operators)
{
long startUSN;
long stopUSN;
startUSN = 0;
foreach (ChangeRecordVector mark in ChangesAlreadySeen)
{
if (0 == String.Compare(operatorKey, mark.NodeID, true))
{
startUSN = mark.OriginatingUSN + 1;
break;
}
}
stopUSN = System.Int64.MaxValue;
foreach (ChangeRecordVector mark in ResponseLimitVector)
{
if (0 == String.Compare(operatorKey, mark.NodeID, true))
{
stopUSN = mark.OriginatingUSN;
break;
}
}
FindChangeRecords.SetRange(operatorKey, startUSN, stopUSN);
}
//
// Retrieve the change records.
//
int limit = Config.GetInt("Replication.ResponseLimitCountDefault");
if (ResponseLimitCount >= 0 && ResponseLimitCount <= limit)
{
limit = ResponseLimitCount;
}
reader = FindChangeRecords.RetrieveResults(limit);
try
{
while (reader.Read())
{
XmlSerializer serializer = null;
switch ((ChangeRecordPayloadType)reader.GetShort("changeTypeID"))
{
case ChangeRecordPayloadType.ChangeRecordNull:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordNull));
break;
case ChangeRecordPayloadType.ChangeRecordNewData:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordNewData));
break;
case ChangeRecordPayloadType.ChangeRecordDelete:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordDelete));
break;
case ChangeRecordPayloadType.ChangeRecordPublisherAssertion:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordPublisherAssertion));
break;
case ChangeRecordPayloadType.ChangeRecordHide:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordHide));
break;
case ChangeRecordPayloadType.ChangeRecordDeleteAssertion:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordDeleteAssertion));
break;
case ChangeRecordPayloadType.ChangeRecordAcknowledgement:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordAcknowledgement));
break;
case ChangeRecordPayloadType.ChangeRecordCorrection:
serializer = XmlSerializerManager.GetSerializer(typeof(ChangeRecordCorrection));
break;
}
StringReader stringReader = new StringReader(reader.GetString("changeData"));
try
{
ChangeRecord changeRecord = new ChangeRecord();
changeRecord.AcknowledgementRequested = (reader.GetInt("flag") & (int)ChangeRecordFlags.AcknowledgementRequested) > 0;
changeRecord.ChangeID.NodeID = reader.GetString("OperatorKey");
changeRecord.ChangeID.OriginatingUSN = reader.GetLong("USN");
ChangeRecordBase changeRecordBase = ( ChangeRecordBase )serializer.Deserialize(stringReader);
if (changeRecordBase is ChangeRecordCorrection)
{
//
// The query to find change records will do correction 'fixups'. That is, the changeData of this
// change record will be replaced with the changeData from the correction. The problem with this is
// that the original change data will now look like a correction. To distinguish these types of
// change records, we look to see if the OriginatingUSN's match. If the OriginatingUSN's match,
// we want they payload of the change record in this correction. This payload will contain the
// corrected data that we want.
//
ChangeRecordCorrection changeRecordCorrection = ( ChangeRecordCorrection )changeRecordBase;
if (changeRecordCorrection.ChangeRecord.ChangeID.OriginatingUSN == changeRecord.ChangeID.OriginatingUSN)
{
changeRecordBase = changeRecordCorrection.ChangeRecord.Payload;
}
}
changeRecord.Payload = changeRecordBase;
detail.ChangeRecords.Add(changeRecord);
}
finally
{
stringReader.Close();
}
}
}
finally
{
reader.Close();
}
}
catch (Exception e)
{
Debug.OperatorMessage(
SeverityType.Error,
CategoryType.Replication,
OperatorMessageType.None,
"Could not retrieve change records:\r\n" + e.ToString());
FindChangeRecords.CleanUp();
throw;
}
return(detail);
}
