/// <summary>
/// Executes the query async.
/// </summary>
/// <typeparam name="T"> class representing the rows returned </typeparam>
/// <returns> </returns>
public async Task <CqlDataReader <T> > ExecuteReaderAsync <T>() where T : class, new()
{
var logger = _connection.LoggerManager.GetLogger("CqlSharp.CqlCommand.ExecuteReader");
logger.LogVerbose("Waiting on Throttle");
//wait until allowed
_connection.Throttle.Wait();
try
{
//capture current command state
QueryExecutionState state = CaptureState();
logger.LogVerbose("State captured, start executing query");
ResultFrame result = await RunWithRetry(ExecuteInternalAsync, state, logger).ConfigureAwait(false);
if (result.ResultOpcode != ResultOpcode.Rows)
{
var ex = new CqlException("Can not create a DataReader for non-select query.");
logger.LogError("Error executing reader: {0}", ex);
throw ex;
}
var reader = new CqlDataReader <T>(result);
logger.LogQuery("Query {0} returned {1} results", _cql, reader.Count);
return(reader);
}
finally
{
_connection.Throttle.Release();
}
}
/// <summary>
/// Executes the non-query async.
/// </summary>
/// <returns> A ICqlQueryResult of type rows, Void, SchemaChange or SetKeySpace </returns>
/// <exception cref="CqlException">Unexpected type of result received</exception>
public async Task <ICqlQueryResult> ExecuteNonQueryAsync()
{
var logger = _connection.LoggerManager.GetLogger("CqlSharp.CqlCommand.ExecuteNonQuery");
logger.LogVerbose("Waiting on Throttle");
//wait until allowed
_connection.Throttle.Wait();
try
{
//capture current command state
QueryExecutionState state = CaptureState();
logger.LogVerbose("State captured, start executing query");
ResultFrame result = await RunWithRetry(ExecuteInternalAsync, state, logger).ConfigureAwait(false);
switch (result.ResultOpcode)
{
case ResultOpcode.Rows:
var reader = new CqlDataReader(result);
logger.LogQuery("Query {0} returned {1} results", _cql, reader.Count);
return(reader);
case ResultOpcode.Void:
logger.LogQuery("Query {0} executed succesfully", _cql);
return(new CqlVoid {
TracingId = result.TracingId
});
case ResultOpcode.SchemaChange:
logger.LogQuery("Query {0} resulted in {1}.{2} {3}", _cql, result.Keyspace, result.Table, result.Change);
return(new CqlSchemaChange
{
TracingId = result.TracingId,
Keyspace = result.Keyspace,
Table = result.Table,
Change = result.Change
});
case ResultOpcode.SetKeyspace:
logger.LogQuery("Query {0} resulted in keyspace set to {1}", _cql, result.Keyspace);
return(new CqlSetKeyspace
{
TracingId = result.TracingId,
Keyspace = result.Keyspace
});
default:
throw new CqlException("Unexpected type of result received");
}
}
finally
{
_connection.Throttle.Release();
}
}