/// <summary>send call request to remote and pending callback
/// </summary>
/// <param name="remoteUri"></param>
/// <param name="operation"></param>
/// <param name="transportHeaders"></param>
/// <param name="call"></param>
/// <param name="callback"></param>
public void Call(Uri remoteUri
, ushort operation
, IDictionary<string, object> transportHeaders
, MethodCall call
, RemotingCallback callback)
{
var data = this._serializationFactory.Get(callback.SerializationFormat).SerializeMethodCall(call);
var flag = Interlocked.Increment(ref this._flag);
callback.Flag = flag;
transportHeaders.Add(RemotingTransportHeader.Flag, flag);
transportHeaders.Add(RemotingTransportHeader.Format, callback.SerializationFormat);
var request = new MemoryStream();
var handle = new RemotingTcpProtocolHandle(request);
handle.WritePreamble();
handle.WriteMajorVersion();
handle.WriteMinorVersion();
handle.WriteOperation(TcpOperations.Request);
handle.WriteContentDelimiter(TcpContentDelimiter.ContentLength);
handle.WriteContentLength(data.Length);
handle.WriteTransportHeaders(transportHeaders);
handle.WriteContent(data);
this.GetChannel(remoteUri).Send(request.ToArray());
this._callbacks.Add(flag, callback);
if (this._log.IsDebugEnabled)
this._log.DebugFormat("pending methodCall#{0}|{1}", flag, remoteUri);
}
private static void Process(RemotingTcpProtocolHandle handle, ILog log, TcpServerChannel server, TcpClient tcpClient)
{
try
{
if (handle == null)
return;
//TODO:process methodCall
MethodCall methodCall = Serializer.DeserializeMethodCall(handle.ReadContent());
}
catch (Exception e)
{
log.Error(e);
//TODO:return error to client
}
finally
{
IOWorker(log, server, tcpClient);
}
}
private void OnMessage(object sender, ChannelContext ctx)
{
var protocol = new RemotingTcpProtocolHandle(new MemoryStream((byte[])ctx.Message));
protocol.ReadPreamble();
protocol.ReadMajorVersion();
protocol.ReadMinorVersion();
ushort operation = protocol.ReadOperation();
if (operation != TcpOperations.Reply)
return;
protocol.ReadContentDelimiter();
protocol.ReadContentLength();
IDictionary<String, object> transportHeaders = protocol.ReadTransportHeaders();
if (!transportHeaders.ContainsKey(RemotingTransportHeader.Flag))
return;
var flag = (int)transportHeaders[RemotingTransportHeader.Flag];
if (this._log.IsDebugEnabled)
this._log.DebugFormat("receive methodReturn of methodCall#{0}", flag);
if (!this._callbacks.ContainsKey(flag))
return;
RemotingCallback callback = this._callbacks[flag];
this.Cancel(callback);
var statusCode = transportHeaders.ContainsKey(TcpTransportHeader.StatusCode)
? (int)transportHeaders[TcpTransportHeader.StatusCode]
: 0;
var statusPhrase = transportHeaders.ContainsKey(TcpTransportHeader.StatusPhrase)
? (string)transportHeaders[TcpTransportHeader.StatusPhrase]
: null;
if (statusCode > 0 || !string.IsNullOrEmpty(statusPhrase))
{
callback.OnException(new RemotingException(string.Format(
"remote reutrn error#%s: %s"
, statusCode
, statusPhrase)));
return;
}
MethodReturn methodReturn = null;
try
{
methodReturn = this._serializationFactory
.Get(callback.SerializationFormat)
.DeserializeMethodReturn(protocol.ReadContent(), callback.ReturnType);
}
catch (Exception e)
{
callback.OnException(e);
return;
}
try { callback.OnMethodReturn(methodReturn); }
catch (Exception e) { this._log.Error(e); }
}
protected override void OnMessage(object sender, MessageEventArgs e)
{
var protocol = new RemotingTcpProtocolHandle(new MemoryStream(e.RawData));
protocol.ReadPreamble();
protocol.ReadMajorVersion();
protocol.ReadMinorVersion();
ushort operation = protocol.ReadOperation();
protocol.ReadContentDelimiter();
protocol.ReadContentLength();
IDictionary<string, Object> transportHeaders = protocol.ReadTransportHeaders();
var flag = (int)transportHeaders[RemotingTransportHeader.Flag];
ISerializer serializer = serializationFactory.Get(null);
transportHeaders.Clear();
transportHeaders.Add(RemotingTransportHeader.Flag, flag);
MethodCall methodCall = serializer.DeserializeMethodCall(protocol.ReadContent());
var methodReturn = new MethodReturn() { ReturnValue = methodCall.Args[0] };
byte[] data = serializer.SerializeMethodReturn(methodReturn);
var response = new MemoryStream();
var handle = new RemotingTcpProtocolHandle(response);
handle.WritePreamble();
handle.WriteMajorVersion();
handle.WriteMinorVersion();
handle.WriteOperation(TcpOperations.Reply);
handle.WriteContentDelimiter(TcpContentDelimiter.ContentLength);
handle.WriteContentLength(data.Length);
handle.WriteTransportHeaders(transportHeaders);
handle.WriteContent(data);
this.Send(response.ToArray());
}
