public object OnRequest(IRequest request)
{
IDBOperation dbOperation = null;
IDBResponse response = null;
RequestParser requestParser = null;
try
{
requestParser = request as RequestParser;
try
{
dbOperation = requestParser.ParseRequest();
}
catch (Exception ex)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("Error: ClientMgr.OnRequest() On Parse Request", ex.ToString());
}
throw;
}
if (dbOperation == null)
{
throw new NullReferenceException("Database Operation");
}
if (_shardName != null && _statsCollector == null)
{
_statsCollector = StatsManager.Instance.GetStatsCollector(new StatsIdentity(_shardName, dbOperation.Database));
}
//Dispose Reader check is a temporary fix for Single Get Operation.
if (dbOperation.OperationType != DatabaseOperationType.DisposeReader && _statsCollector != null)
{
_statsCollector.IncrementStatsValue(StatisticsType.RequestsPerSec);
}
//TODO: when SessionId will be embedded into command from router, this code needs to be removed
//if (dbOperation.SessionId == null)
// dbOperation.SessionId = new RouterSessionId();
//dbOperation.SessionId = SessionId;
//if (_dbEngine == null)
// throw new NullReferenceException("DBEngine (Client Manager)");
//LoggerManager.Instance.SetThreadContext(new LoggerContext { ShardName = ((DataBaseEngine)DbEngine).NodeContext.LocalShardName, DatabaseName = dbOperation.Database });
switch (dbOperation.OperationType)
{
case DatabaseOperationType.Init:
response = _dbEngine.InitializeDatabase((InitDatabaseOperation)dbOperation);
if (response.IsSuccessfull)
{
_database = dbOperation.Database;
}
break;
case DatabaseOperationType.Insert:
response = _dbEngine.InsertDocuments((InsertDocumentsOperation)dbOperation);
break;
case DatabaseOperationType.Delete:
response = _dbEngine.DeleteDocuments((DeleteDocumentsOperation)dbOperation);
break;
case DatabaseOperationType.Get:
response = _dbEngine.GetDocuments((GetDocumentsOperation)dbOperation);
if (response != null && response.IsSuccessfull)
{
var getResponse = (GetDocumentsResponse)response;
if (!getResponse.DataChunk.IsLastChunk)
{
var readerInfo = new ReaderInfo
{
DatabaseName = dbOperation.Database,
CollectionName = dbOperation.Collection,
ReaderId = getResponse.DataChunk.ReaderUID
};
lock (_readersList)
{
_readersList.Add(readerInfo);
}
}
}
break;
case DatabaseOperationType.Update:
response = _dbEngine.UpdateDocuments((UpdateOperation)dbOperation);
break;
case DatabaseOperationType.Replace:
response = _dbEngine.ReplaceDocuments((IDocumentsWriteOperation)dbOperation);
break;
case DatabaseOperationType.ReadQuery:
response = _dbEngine.ExecuteReader((ReadQueryOperation)dbOperation);
if (response != null && response.IsSuccessfull)
{
var readQueryResponse = (ReadQueryResponse)response;
if (!readQueryResponse.DataChunk.IsLastChunk)
{
var readerInfo = new ReaderInfo
{
DatabaseName = dbOperation.Database,
CollectionName = dbOperation.Collection,
ReaderId = readQueryResponse.DataChunk.ReaderUID
};
lock (_readersList)
{
_readersList.Add(readerInfo);
}
}
}
break;
case DatabaseOperationType.WriteQuery:
response = _dbEngine.ExecuteNonQuery((WriteQueryOperation)dbOperation);
break;
case DatabaseOperationType.CreateSession:
break;
case DatabaseOperationType.GetChunk:
response = _dbEngine.GetDataChunk((GetChunkOperation)dbOperation);
break;
case DatabaseOperationType.DisposeReader:
var disposeReaderOperation = (DisposeReaderOperation)dbOperation;
response = _dbEngine.DiposeReader(disposeReaderOperation);
if (response != null && response.IsSuccessfull)
{
lock (_readersList)
{
_readersList.RemoveAll(
x =>
x.CollectionName == disposeReaderOperation.Collection &&
x.DatabaseName == disposeReaderOperation.Database &&
x.ReaderId == disposeReaderOperation.ReaderUID);
}
}
break;
case DatabaseOperationType.Authenticate:
var authenticationOperation = (AuthenticationOperation)dbOperation;
_noSConnectionString = new ConnectionStringBuilder(authenticationOperation.ConnectionString);
_dbEngine = _databaseEngineFactory.GetDatabaseEngine(_noSConnectionString);
authenticationOperation.Address = ServerChannel.PeerAddress;
response = _dbEngine.Authenticate(authenticationOperation);
AuthenticationResponse authResponse = response as AuthenticationResponse;
if (
!(authResponse.ServerToken.Status == Common.Security.SSPI.SecurityStatus.SecurityDisabled ||
authResponse.ServerToken.Status == Common.Security.SSPI.SecurityStatus.ContinueNeeded ||
authResponse.ServerToken.Status == Common.Security.SSPI.SecurityStatus.OK))
{
this.ChannelDisconnected(_serverChannel, "unauthenticated");
}
else
{
CsSessionId = dbOperation.SessionId;
_clientProcessID = authenticationOperation.ClientProcessID;
}
break;
default:
throw new Exception("Invalid Operation");
}
}
catch (SerializationException se)
{
try
{
if (requestParser == null)
{
requestParser = request.Message as RequestParser;
}
response = OperationMapper.GetResponse(requestParser.OperationType);
response.IsSuccessfull = false;
response.RequestId = requestParser.RequestId;
response.ErrorCode = se.ErrorCode != 0 ? se.ErrorCode : ErrorCodes.Cluster.UNKNOWN_ISSUE;
response.ErrorParams = se.Parameters;
}
catch (Exception)
{
//Create response if exception occurs.
if (dbOperation != null)
{
response = dbOperation.CreateResponse();
}
response.ErrorCode = ErrorCodes.Cluster.UNKNOWN_ISSUE;
}
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("Error: ClientMgr.OnRequest()", se.ToString());
}
}
catch (DatabaseException de)
{
if (dbOperation != null)
{
response = dbOperation.CreateResponse();
}
if (response != null)
{
response.IsSuccessfull = false;
response.ErrorCode = de.ErrorCode != 0 ? de.ErrorCode : ErrorCodes.Cluster.UNKNOWN_ISSUE;
response.ErrorParams = de.Parameters;
}
}
catch (ManagementException me)
{
if (dbOperation != null)
{
response = dbOperation.CreateResponse();
}
if (response != null)
{
response.IsSuccessfull = false;
if (me.IsErrorCodeSpecified)
{
response.ErrorCode = me.ErrorCode;
response.ErrorParams = me.Parameters;
}
}
}
catch (Exception e)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("Error: ClientMgr.OnRequest()",
e.Message + " StackTrace:" + e.StackTrace);
}
if (dbOperation != null)
{
response = dbOperation.CreateResponse();
}
if (response != null)
{
response.IsSuccessfull = false;
response.ErrorCode = ErrorCodes.Cluster.UNKNOWN_ISSUE;
}
}
finally
{
try
{
if (request.Channel.Connected)
{
request.Channel.SendMessage(response);
}
}
catch (ChannelException e)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("Error: ClientMgr.OnRequest()", e.ToString());
}
}
catch (Exception ex)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("Error: Exception on ClientMgr.OnRequest()", ex.ToString());
}
}
}
return(null);
}