/// <summary>
/// Writes the query parameters.
/// </summary>
/// <param name="buffer">The buffer.</param>
protected void WriteQueryParameters(Stream buffer)
{
buffer.WriteConsistency(CqlConsistency);
var flags = (byte)((Parameters != null ? 1 : 0) |
(SkipMetaData ? 2 : 0) |
(PageSize.HasValue ? 4 : 0) |
(PagingState != null ? 8 : 0) |
(SerialConsistency.HasValue ? 16 : 0) |
(ProtocolVersion >= 3 && Timestamp.HasValue ? 32 : 0));
buffer.WriteByte(flags);
if(Parameters != null)
{
buffer.WriteShort((ushort)Parameters.Count);
foreach(var value in Parameters)
buffer.WriteByteArray(value);
}
if(PageSize.HasValue)
buffer.WriteInt(PageSize.Value);
if(PagingState != null)
buffer.WriteByteArray(PagingState);
if(SerialConsistency.HasValue)
buffer.WriteShort((ushort)SerialConsistency.Value);
if(ProtocolVersion >= 3 && Timestamp.HasValue)
buffer.WriteLong(Timestamp.Value.ToTimestamp()*1000); //convert milliseconds to microseconds
}
/// <summary>
/// Writes the data to buffer.
/// </summary>
/// <param name="buffer"> The buffer. </param>
protected override void WriteData(Stream buffer)
{
if(ProtocolVersion == 1)
{
throw new ProtocolException(ProtocolVersion, ErrorCode.Protocol, "Batch frames are supported from Cassandra Version 2.0.0 and up.");
}
buffer.WriteByte((byte)Type);
buffer.WriteShort((ushort)Commands.Count);
foreach(var command in Commands)
{
if(command.IsPrepared)
{
buffer.WriteByte(1);
buffer.WriteShortByteArray(command.QueryId);
}
else
{
buffer.WriteByte(0);
buffer.WriteLongString(command.CqlQuery);
}
if(command.ParameterValues != null)
{
byte[][] paramValues = command.ParameterValues.Serialize(ProtocolVersion);
var length = (ushort)paramValues.Length;
buffer.WriteShort(length);
for(var i = 0; i < length; i++)
{
buffer.WriteByteArray(paramValues[i]);
}
}
else
buffer.WriteShort(0);
}
buffer.WriteConsistency(CqlConsistency);
if(ProtocolVersion >= 3)
{
var flags = (byte)((SerialConsistency.HasValue ? 16 : 0) |
(Timestamp.HasValue ? 32 : 0));
buffer.WriteByte(flags);
if(SerialConsistency.HasValue)
buffer.WriteShort((ushort)SerialConsistency.Value);
if(Timestamp.HasValue)
buffer.WriteLong(Timestamp.Value.ToTimestamp());
}
}
