private int _Read(byte[] b)
{
SDBMessage sdbMessage = new SDBMessage();
// MsgHeader
sdbMessage.OperationCode = Operation.MSG_BS_LOB_READ_REQ;
sdbMessage.NodeID = SequoiadbConstants.ZERO_NODEID;
sdbMessage.RequestID = 0;
// the rest part of _MsgOpLOb
sdbMessage.Version = SequoiadbConstants.DEFAULT_VERSION;
sdbMessage.W = SequoiadbConstants.DEFAULT_W;
sdbMessage.Padding = (short)0;
sdbMessage.Flags = SequoiadbConstants.DEFAULT_FLAGS;
sdbMessage.ContextIDList = new List <long>();
sdbMessage.ContextIDList.Add(_contextID);
sdbMessage.BsonLen = 0;
// MsgLobTuple
sdbMessage.LobLen = (uint)b.Length;
sdbMessage.LobSequence = SDB_LOB_DEFAULT_SEQ;
sdbMessage.LobOffset = _readOffset;
// build send msg
byte[] request = SDBMessageHelper.BuildReadLobRequest(sdbMessage, _isBigEndian);
// send msg
_connection.SendMessage(request);
// receive and extract return msg from engine
SDBMessage rtnSDBMessage = SDBMessageHelper.MsgExtractReadLobReply(_connection.ReceiveMessage(_isBigEndian), _isBigEndian);
// check the result
int flags = rtnSDBMessage.Flags;
int errCode = new BaseException("SDB_DMS_EOC").ErrorCode;
if (errCode == flags)
{
return(-1);
}
else if (0 != flags)
{
throw new BaseException(flags);
}
// return the result
byte[] lobData = rtnSDBMessage.LobBuff;
Array.Copy(lobData, b, lobData.Length);
_readOffset += lobData.Length;
return(lobData.Length);
}
/** \fn DBCursor ListLobs()
* \brief List all of the lobs in current collection
* \retval DBCursor of lobs
* \exception SequoiaDB.BaseException
* \exception System.Exception
*/
public DBCursor ListLobs()
{
DBCursor cursor = null;
// build command
string command = SequoiadbConstants.ADMIN_PROMPT
+ SequoiadbConstants.LIST_LOBS_CMD;
// build a bson to send
BsonDocument newObj = new BsonDocument();
newObj.Add(SequoiadbConstants.FIELD_COLLECTION, collectionFullName);
// run command
BsonDocument dummyObj = new BsonDocument();
SDBMessage rtnSDBMessage = AdminCommand(command, newObj, dummyObj, dummyObj, dummyObj, 0, -1, 0);
// check the return flag
int flags = rtnSDBMessage.Flags;
if (flags != 0)
{
int errCode = new BaseException("SDB_DMS_EOC").ErrorCode;
if (errCode == flags)
{
return cursor;
}
else
{
throw new BaseException(flags);
}
}
cursor = new DBCursor(rtnSDBMessage, this);
return cursor;
}
private int _Read(byte[] b)
{
SDBMessage sdbMessage = new SDBMessage();
// MsgHeader
sdbMessage.OperationCode = Operation.MSG_BS_LOB_READ_REQ;
sdbMessage.NodeID = SequoiadbConstants.ZERO_NODEID;
sdbMessage.RequestID = 0;
// the rest part of _MsgOpLOb
sdbMessage.Version = SequoiadbConstants.DEFAULT_VERSION;
sdbMessage.W = SequoiadbConstants.DEFAULT_W;
sdbMessage.Padding = (short)0;
sdbMessage.Flags = SequoiadbConstants.DEFAULT_FLAGS;
sdbMessage.ContextIDList = new List<long>();
sdbMessage.ContextIDList.Add(_contextID);
sdbMessage.BsonLen = 0;
// MsgLobTuple
sdbMessage.LobLen = (uint)b.Length;
sdbMessage.LobSequence = SDB_LOB_DEFAULT_SEQ;
sdbMessage.LobOffset = _readOffset;
// build send msg
byte[] request = SDBMessageHelper.BuildReadLobRequest(sdbMessage, _isBigEndian);
// send msg
_connection.SendMessage(request);
// receive and extract return msg from engine
SDBMessage rtnSDBMessage = SDBMessageHelper.MsgExtractReadLobReply(_connection.ReceiveMessage(_isBigEndian), _isBigEndian);
// check the result
int flags = rtnSDBMessage.Flags;
int errCode = new BaseException("SDB_DMS_EOC").ErrorCode;
if ( errCode == flags)
{
return -1;
}
else if (0 != flags)
{
throw new BaseException(flags);
}
// return the result
byte[] lobData = rtnSDBMessage.LobBuff;
Array.Copy(lobData, b, lobData.Length);
_readOffset += lobData.Length;
return lobData.Length;
}
public void ExceptionTest()
{
string errorType = "SDB_DMS_EOC";
BaseException ex = new BaseException(errorType);
Assert.IsTrue(ex.Message.ToString().Equals("End of collection"));
}
