public QueryRequest(ProtocolVersion protocolVersion, string cqlQuery, bool tracingEnabled, QueryProtocolOptions queryOptions)
{
this.RequestId = Guid.NewGuid();
_cqlQuery = cqlQuery;
_queryOptions = queryOptions;
if (tracingEnabled)
{
_headerFlags = FrameHeader.HeaderFlag.Tracing;
}
if (queryOptions == null)
{
throw new ArgumentNullException("queryOptions");
}
if (queryOptions.SerialConsistency != ConsistencyLevel.Any && queryOptions.SerialConsistency.IsSerialConsistencyLevel() == false)
{
throw new RequestInvalidException("Non-serial consistency specified as a serial one.");
}
if (!protocolVersion.SupportsTimestamp())
{
//Features supported in protocol v3 and above
if (queryOptions.Timestamp != null)
{
throw new NotSupportedException("Timestamp for query is supported in Cassandra 2.1 and above.");
}
if (queryOptions.ValueNames != null && queryOptions.ValueNames.Count > 0)
{
throw new NotSupportedException("Query parameter names feature is supported in Cassandra 2.1 and above.");
}
}
}
internal static QueryProtocolOptions CreateFromQuery(
ProtocolVersion protocolVersion, Statement query, IRequestOptions requestOptions)
{
if (query == null)
{
return(Default);
}
var consistency = query.ConsistencyLevel ?? requestOptions.ConsistencyLevel;
var pageSize = query.PageSize != 0 ? query.PageSize : requestOptions.PageSize;
long?timestamp = null;
if (query.Timestamp != null)
{
timestamp = TypeSerializer.SinceUnixEpoch(query.Timestamp.Value).Ticks / 10;
}
else if (protocolVersion.SupportsTimestamp())
{
timestamp = requestOptions.TimestampGenerator.Next();
if (timestamp == long.MinValue)
{
timestamp = null;
}
}
return(new QueryProtocolOptions(
consistency,
query.QueryValues,
query.SkipMetadata,
pageSize,
query.PagingState,
requestOptions.GetSerialConsistencyLevelOrDefault(query),
timestamp,
query.Keyspace));
}
private QueryFlags GetFlags(ProtocolVersion protocolVersion)
{
QueryFlags flags = 0;
if (Values != null && Values.Length > 0)
{
flags |= QueryFlags.Values;
}
if (_skipMetadata)
{
flags |= QueryFlags.SkipMetadata;
}
if (PageSize != int.MaxValue && PageSize >= 0)
{
flags |= QueryFlags.PageSize;
}
if (PagingState != null)
{
flags |= QueryFlags.WithPagingState;
}
if (SerialConsistency != ConsistencyLevel.Any)
{
flags |= QueryFlags.WithSerialConsistency;
}
if (protocolVersion.SupportsTimestamp() && RawTimestamp != null)
{
flags |= QueryFlags.WithDefaultTimestamp;
}
if (ValueNames != null && ValueNames.Count > 0)
{
flags |= QueryFlags.WithNameForValues;
}
return(flags);
}
public BatchRequest(ProtocolVersion protocolVersion, BatchStatement statement, ConsistencyLevel consistency,
Policies policies)
{
if (!protocolVersion.SupportsBatch())
{
throw new NotSupportedException("Batch request is supported in C* >= 2.0.x");
}
_type = statement.BatchType;
_requests = statement.Queries
.Select(q => q.CreateBatchRequest(protocolVersion))
.ToArray();
Consistency = consistency;
if (statement.IsTracing)
{
_headerFlags = FrameHeader.HeaderFlag.Tracing;
}
if (statement.SerialConsistencyLevel != ConsistencyLevel.Any)
{
if (!protocolVersion.SupportsTimestamp())
{
throw new NotSupportedException("Serial consistency level for BATCH request is supported in Cassandra 2.1 or above.");
}
if (statement.SerialConsistencyLevel < ConsistencyLevel.Serial)
{
throw new RequestInvalidException("Non-serial consistency specified as a serial one.");
}
_batchFlags |= QueryProtocolOptions.QueryFlags.WithSerialConsistency;
_serialConsistency = statement.SerialConsistencyLevel;
}
_timestamp = GetRequestTimestamp(protocolVersion, statement, policies);
if (_timestamp != null)
{
_batchFlags |= QueryProtocolOptions.QueryFlags.WithDefaultTimestamp;
}
}
internal static QueryProtocolOptions CreateFromQuery(ProtocolVersion protocolVersion, Statement query,
QueryOptions queryOptions, Policies policies)
{
if (query == null)
{
return(Default);
}
var consistency = query.ConsistencyLevel ?? queryOptions.GetConsistencyLevel();
var pageSize = query.PageSize != 0 ? query.PageSize : queryOptions.GetPageSize();
long?timestamp = null;
if (query.Timestamp != null)
{
timestamp = TypeSerializer.SinceUnixEpoch(query.Timestamp.Value).Ticks / 10;
}
else if (protocolVersion.SupportsTimestamp())
{
timestamp = policies.TimestampGenerator.Next();
if (timestamp == long.MinValue)
{
timestamp = null;
}
}
return(new QueryProtocolOptions(
consistency,
query.QueryValues,
query.SkipMetadata,
pageSize,
query.PagingState,
query.SerialConsistencyLevel,
timestamp));
}
/// <summary>
/// Gets the timestamp of the request or null if not defined.
/// </summary>
/// <exception cref="NotSupportedException" />
private static long?GetRequestTimestamp(ProtocolVersion protocolVersion, BatchStatement statement, ITimestampGenerator timestampGenerator)
{
if (!protocolVersion.SupportsTimestamp())
{
if (statement.Timestamp != null)
{
throw new NotSupportedException(
"Timestamp for BATCH request is supported in Cassandra 2.1 or above.");
}
return(null);
}
if (statement.Timestamp != null)
{
return(TypeSerializer.SinceUnixEpoch(statement.Timestamp.Value).Ticks / 10);
}
var timestamp = timestampGenerator.Next();
return(timestamp != long.MinValue ? (long?)timestamp : null);
}
private QueryFlags GetFlags(ProtocolVersion protocolVersion, bool isPrepared)
{
QueryFlags flags = 0;
if (Values != null && Values.Length > 0)
{
flags |= QueryFlags.Values;
}
if (_skipMetadata)
{
flags |= QueryFlags.SkipMetadata;
}
if (PageSize != int.MaxValue && PageSize >= 0)
{
flags |= QueryFlags.PageSize;
}
if (PagingState != null)
{
flags |= QueryFlags.WithPagingState;
}
if (SerialConsistency != ConsistencyLevel.Any)
{
flags |= QueryFlags.WithSerialConsistency;
}
if (protocolVersion.SupportsTimestamp() && RawTimestamp != null)
{
flags |= QueryFlags.WithDefaultTimestamp;
}
if (ValueNames != null && ValueNames.Count > 0)
{
flags |= QueryFlags.WithNameForValues;
}
if (!isPrepared && protocolVersion.SupportsKeyspaceInRequest() && _keyspace != null)
{
// Providing keyspace is only useful for QUERY requests.
// For EXECUTE requests, the keyspace will be the one from the prepared statement.
flags |= QueryFlags.WithKeyspace;
}
return(flags);
}
public ExecuteRequest(ProtocolVersion protocolVersion, byte[] id, RowSetMetadata metadata, bool tracingEnabled, QueryProtocolOptions queryOptions)
{
if (metadata != null && queryOptions.Values.Length != metadata.Columns.Length)
{
throw new ArgumentException("Number of values does not match with number of prepared statement markers(?).");
}
_id = id;
_queryOptions = queryOptions;
if (tracingEnabled)
{
_headerFlags = FrameHeader.HeaderFlag.Tracing;
}
if (queryOptions.SerialConsistency != ConsistencyLevel.Any && queryOptions.SerialConsistency.IsSerialConsistencyLevel() == false)
{
throw new RequestInvalidException("Non-serial consistency specified as a serial one.");
}
if (queryOptions.Timestamp != null && !protocolVersion.SupportsTimestamp())
{
throw new NotSupportedException("Timestamp for query is supported in Cassandra 2.1 or above.");
}
}