/// <summary>
/// Returns an action that capture the parameters closure
/// </summary>
private Action <MemoryStream> CreateResponseAction(FrameHeader header, Action <Exception, Response> callback)
{
var compressor = Compressor;
return(delegate(MemoryStream stream)
{
Response response = null;
Exception ex = null;
var nextPosition = stream.Position + header.BodyLength;
try
{
Stream plainTextStream = stream;
if (header.Flags.HasFlag(FrameHeader.HeaderFlag.Compression))
{
plainTextStream = compressor.Decompress(new WrappedStream(stream, header.BodyLength));
plainTextStream.Position = 0;
}
response = FrameParser.Parse(new Frame(header, plainTextStream, _serializer));
}
catch (Exception catchedException)
{
ex = catchedException;
}
if (response is ErrorResponse)
{
//Create an exception from the response error
ex = ((ErrorResponse)response).Output.CreateException();
response = null;
}
//We must advance the position of the stream manually in case it was not correctly parsed
stream.Position = nextPosition;
callback(ex, response);
});
}
public IAsyncResult BeginExecuteQuery(int _streamId, byte[] Id, string cql, RowSetMetadata Metadata, object[] values,
AsyncCallback callback, object state, object owner,
ConsistencyLevel consistency, bool isTracing)
{
var jar = SetupJob(_streamId, callback, state, owner, "EXECUTE");
BeginJob(jar, SetupKeyspace(SetupPreparedQuery(Id, cql, (streamId) =>
{
Evaluate(new ExecuteRequest(streamId, Id, Metadata, values, consistency, isTracing), streamId,
new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ResultResponse)
{
JobFinished(streamId, (response as ResultResponse).Output);
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response,
StreamId = streamId
});
}
}));
})));
return(jar);
}
public Action SetupPreparedQuery(AsyncResult <IOutput> jar, byte[] Id, string cql, Action dx)
{
return(new Action(() =>
{
if (!preparedQueries.ContainsKey(Id))
{
Evaluate(new PrepareRequest(jar.StreamId, cql), jar.StreamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ResultResponse)
{
preparedQueries.TryAdd(Id, cql);
dx();
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, Jar = jar
});
}
}));
}
else
{
dx();
}
}));
}
public IAsyncResult BeginPrepareQuery(int stramId, string cqlQuery, AsyncCallback callback, object state, object owner)
{
var jar = SetupJob(stramId, callback, state, owner, "PREPARE");
BeginJob(jar, SetupKeyspace((streamId) =>
{
Evaluate(new PrepareRequest(streamId, cqlQuery), streamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ResultResponse)
{
var outp = (response as ResultResponse).Output;
if (outp is OutputPrepared)
{
preparedQueries[(outp as OutputPrepared).QueryID] = cqlQuery;
}
JobFinished(streamId, outp);
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, StreamId = streamId
});
}
}));
}));
return(jar);
}
public Action <int> SetupKeyspace(Action <int> dx)
{
return(new Action <int>((streamId) =>
{
if (currentKs != selectedKs)
{
Evaluate(new QueryRequest(streamId, "USE " + selectedKs, ConsistencyLevel.Default, false), streamId, new Action <ResponseFrame>((frame3) =>
{
var response = FrameParser.Parse(frame3);
if (response is ResultResponse)
{
currentKs = selectedKs;
dx(streamId);
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, StreamId = streamId
});
}
}));
}
else
{
dx(streamId);
}
}));
}
public Action SetupKeyspace(AsyncResult <IOutput> jar, Action dx)
{
return(new Action(() =>
{
if (!currentKs.Value.Equals(selectedKs.Value))
{
Evaluate(new QueryRequest(jar.StreamId, CqlQueryTools.GetUseKeyspaceCQL(selectedKs.Value), ConsistencyLevel.Default, false), jar.StreamId, new Action <ResponseFrame>((frame3) =>
{
var response = FrameParser.Parse(frame3);
if (response is ResultResponse)
{
currentKs.Value = selectedKs.Value;
dx();
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, Jar = jar
});
}
}));
}
else
{
dx();
}
}));
}
public IAsyncResult BeginExecuteQueryOptions(int _streamId, AsyncCallback callback, object state, object owner)
{
var jar = SetupJob(_streamId, callback, state, owner, "OPTIONS");
BeginJob(jar, new Action(() =>
{
Evaluate(new OptionsRequest(jar.StreamId), jar.StreamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is SupportedResponse)
{
JobFinished(jar, (response as SupportedResponse).Output);
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, Jar = jar
});
}
}));
}), true);
return(jar);
}
public Action <int> SetupPreparedQuery(byte[] Id, string cql, Action <int> dx)
{
return(new Action <int>((streamId) =>
{
if (!preparedQueries.ContainsKey(Id))
{
Evaluate(new PrepareRequest(streamId, cql), streamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ResultResponse)
{
preparedQueries[Id] = cql;
dx(streamId);
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, StreamId = streamId
});
}
}));
}
else
{
dx(streamId);
}
}));
}
private AbstractResponse ReadParseResponse(FrameHeader header, Stream body)
{
//Start at the first byte
body.Position = 0;
if ((header.Flags & 0x01) > 0)
{
body = Compressor.Decompress(body);
}
var frame = new ResponseFrame(header, body);
var response = FrameParser.Parse(frame);
return(response);
}
private void EventOccured(ResponseFrame frame)
{
var response = FrameParser.Parse(frame);
if (response is EventResponse)
{
if (CassandraEvent != null)
{
CassandraEvent.Invoke(this, (response as EventResponse).CassandraEventArgs);
}
return;
}
throw new DriverInternalError("Unexpected response frame");
}
public IAsyncResult BeginExecuteQueryOptions(AsyncCallback callback, object state, object owner)
{
return(BeginJob(callback, state, owner, "OPTIONS", new Action <int>((streamId) =>
{
Evaluate(new OptionsRequest(streamId), streamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is SupportedResponse)
{
JobFinished(streamId, (response as SupportedResponse).Output);
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, StreamId = streamId
});
}
}));
}), true));
}
public IAsyncResult BeginExecuteQueryCredentials(IDictionary <string, string> credentials, AsyncCallback callback, object state, object owner)
{
return(BeginJob(callback, state, owner, "CREDENTIALS", new Action <int>((streamId) =>
{
Evaluate(new CredentialsRequest(streamId, credentials), streamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ReadyResponse)
{
JobFinished(streamId, new OutputVoid(null));
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, StreamId = streamId
});
}
}));
})));
}
public IAsyncResult BeginQuery(string cqlQuery, AsyncCallback callback, object state, object owner, ConsistencyLevel consistency, bool tracingEnabled)
{
return(BeginJob(callback, state, owner, "QUERY", SetupKeyspace((streamId) =>
{
Evaluate(new QueryRequest(streamId, cqlQuery, consistency, tracingEnabled), streamId, (frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ResultResponse)
{
JobFinished(streamId, (response as ResultResponse).Output);
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, StreamId = streamId
});
}
});
})));
}
public IAsyncResult BeginRegisterForCassandraEvent(CassandraEventType eventTypes, AsyncCallback callback, object state, object owner)
{
return(BeginJob(callback, state, owner, "REGISTER", new Action <int>((streamId) =>
{
Evaluate(new RegisterForEventRequest(streamId, eventTypes), streamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ReadyResponse)
{
JobFinished(streamId, new OutputVoid(null));
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, StreamId = streamId
});
}
}));
})));
}
/// <summary>
/// Returns an action that capture the parameters closure
/// </summary>
private Action <MemoryStream> CreateResponseAction(FrameHeader header, Action <Exception, Response> callback)
{
var compressor = Compressor;
var bufferPool = Configuration.BufferPool;
var decompressorBuffer = _decompressorBuffer;
return(stream =>
{
Response response = null;
Exception ex = null;
var nextPosition = stream.Position + header.BodyLength;
try
{
Stream plainTextStream = stream;
if (header.Flags.HasFlag(FrameHeader.HeaderFlag.Compression))
{
var compressedBodyStream = bufferPool.GetStream(typeof(Connection) + "/Decompress", header.BodyLength);
Utils.CopyStream(stream, compressedBodyStream, header.BodyLength, decompressorBuffer);
compressedBodyStream.Position = 0;
plainTextStream = compressor.Decompress(compressedBodyStream);
plainTextStream.Position = 0;
}
response = FrameParser.Parse(new Frame(header, plainTextStream));
}
catch (Exception catchedException)
{
ex = catchedException;
}
if (response is ErrorResponse)
{
//Create an exception from the response error
ex = ((ErrorResponse)response).Output.CreateException();
response = null;
}
//We must advance the position of the stream manually in case it was not correctly parsed
stream.Position = nextPosition;
callback(ex, response);
});
}
public IAsyncResult BeginExecuteQueryCredentials(int _streamId, IDictionary <string, string> credentials, AsyncCallback callback, object state, object owner)
{
var jar = SetupJob(_streamId, callback, state, owner, "CREDENTIALS");
BeginJob(jar, new Action(() =>
{
Evaluate(new CredentialsRequest(jar.StreamId, credentials), jar.StreamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ReadyResponse)
{
JobFinished(jar, new OutputVoid(null));
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, Jar = jar
});
}
}));
}));
return(jar);
}
public IAsyncResult BeginRegisterForCassandraEvent(int _streamId, CassandraEventType eventTypes, AsyncCallback callback, object state, object owner)
{
var jar = SetupJob(_streamId, callback, state, owner, "REGISTER");
BeginJob(jar, new Action(() =>
{
Evaluate(new RegisterForEventRequest(jar.StreamId, eventTypes), jar.StreamId, new Action <ResponseFrame>((frame2) =>
{
var response = FrameParser.Parse(frame2);
if (response is ReadyResponse)
{
JobFinished(jar, new OutputVoid(null));
}
else
{
_protocolErrorHandlerAction(new ErrorActionParam()
{
AbstractResponse = response, Jar = jar
});
}
}));
}));
return(jar);
}
