/// <summary>
/// Callback method to process received packet from the secure transport connection
/// </summary>
/// <param name="packet">Received data packet</param>
/// <returns>Async task that resolves to indicate the completion of packet processing</returns>
public Task OnPacketReceived(byte[] packet)
{
var connection = this.Connection;
var timer = Stopwatch.StartNew();
ProtocolRequestCall call = this.protocol.DeserializeRequest(packet, packet.Length, connection.ProtocolVersion, this.sessionState);
RequestResponse response = null;
try
{
if (call.Request != null)
{
string sState = this.sessionState.ToString();
ZooKeeperServerEventSource.Log.ProcessRequest(this.Id, call.CallId, (int)call.Request.RequestType, call.Request.Path, packet.Length, connection.ProtocolVersion, sState);
response = this.ProcessRequest(call.Request, call.ProtocolRequest as IZooKeeperRequest);
ZooKeeperServerEventSource.Log.ProcessRequestSucceeded(this.Id, call.CallId, (int)call.Request.RequestType, call.Request.Path, packet.Length, connection.ProtocolVersion, sState);
response.CallId = call.CallId;
}
else
{
if (call.ProtocolRequest is ZkprProtocolMessages.Ping)
{
ZkprProtocolMessages.Ping pingRequest = call.ProtocolRequest as ZkprProtocolMessages.Ping;
response = new RequestResponse();
response.CallId = (ulong)pingRequest.Xid;
response.ResultCode = (int)RingMasterException.Code.Ok;
}
}
}
catch (Exception ex)
{
ZooKeeperServerEventSource.Log.ProcessRequestFailed(this.Id, call == null ? ulong.MaxValue : call.CallId, ex.ToString());
response = new RequestResponse();
response.CallId = call.CallId;
response.ResultCode = (int)RingMasterException.Code.Systemerror;
}
if (response != null)
{
byte[] responsePacket = this.protocol.SerializeResponse(response, connection.ProtocolVersion, call.ProtocolRequest as IZooKeeperRequest);
if (responsePacket != null)
{
connection.Send(responsePacket);
}
else
{
ZooKeeperServerEventSource.Log.NullResponsePacket(
response.CallId,
call.ProtocolRequest == null ? "null" : (call.ProtocolRequest as IZooKeeperRequest).RequestType.ToString(),
call.Request == null ? "null" : call.Request.RequestType.ToString());
}
}
timer.Stop();
ZooKeeperServerEventSource.Log.ProcessRequestCompleted(this.Id, call == null ? ulong.MaxValue : call.CallId, timer.ElapsedMilliseconds);
this.instrumentation?.OnRequestCompleted(call.Request == null ? RingMasterRequestType.None : call.Request.RequestType, timer.Elapsed);
return(Task.FromResult(0));
}
/// <summary>
/// Deserialize a <see cref="RequestCall"/>.
/// </summary>
/// <param name="serializedRequest">Serialized representation of the request</param>
/// <param name="serializedRequestLength">Length of serialized request</param>
/// <param name="version">Serialization protocol version to use</param>
/// <param name="sessionState">The Session State</param>
/// <returns>The deserialized <see cref="RequestCall"/></returns>
public ProtocolRequestCall DeserializeRequest(byte[] serializedRequest, int serializedRequestLength, uint version, ISessionState sessionState)
{
using (var deserializer = new ZkprDeserializer(serializedRequest, serializedRequestLength, version))
{
ZkprPerSessionState zkprSessionState = sessionState as ZkprPerSessionState;
ProtocolRequestCall theCall = deserializer.DeserializeRequest(zkprSessionState);
return(theCall);
}
}
