private bool closed = false; // True if the transaction has completed
/// <summary>
/// Constructs a <see cref="MsgRequestContext" /> for transactions that are not within a session.
/// </summary>
/// <param name="router">The <see cref="MsgRouter" />.</param>
/// <param name="requestMsg">The request <see cref="Msg" />.</param>
/// <exception cref="ArgumentException">Thrown if the message passed does not have all of the headers necessary to be a request.</exception>
internal MsgRequestContext(MsgRouter router, Msg requestMsg)
{
if (router == null)
{
throw new ArgumentNullException("router");
}
if (requestMsg._FromEP == null)
{
throw new ArgumentException("Message cannot be a request: Null [_FromEP] header.", "requestMsg");
}
if (requestMsg._SessionID == Guid.Empty)
{
throw new ArgumentException("Message cannot be a request: Empty [_SessionID] header.", "requestMsg");
}
this.router = router;
this.session = null;
this.FromEP = requestMsg._FromEP.Clone();
this.SessionID = requestMsg._SessionID;
#if TRACE
this.TraceName = requestMsg.GetType().Name;
#else
this.TraceName = "(trace disabled)";
#endif
}
/// <summary>
/// Constructs a <see cref="MsgRequestContext" /> for transactions that are within a session.
/// </summary>
/// <param name="session">The <see cref="DuplexSession" />.</param>
/// <param name="query">The request <see cref="Msg" />.</param>
/// <exception cref="ArgumentException">Thrown if the message passed does not have all of the headers necessary to be a request.</exception>
internal MsgRequestContext(DuplexSession session, Msg query)
{
if (session == null)
{
throw new ArgumentNullException("session");
}
if (query._FromEP == null)
{
throw new ArgumentException("Message cannot be a request: Null [_FromEP] header.", "requestMsg");
}
if (query._SessionID == Guid.Empty)
{
throw new ArgumentException("Message cannot be a request: Empty [_SessionID] header.", "requestMsg");
}
this.Header = query._ExtensionHeaders[MsgHeaderID.DuplexSession];
if (this.Header == null)
{
throw new ArgumentException("Message is not a DuplexSession query.", "requestMsg");
}
this.router = session.Router;
this.session = session;
this.FromEP = query._FromEP.Clone();
this.SessionID = query._SessionID;
#if TRACE
this.TraceName = query.GetType().Name;
#else
this.TraceName = "(trace disabled)";
#endif
}
/// <summary>
/// Handles remote side closure of the underlying LillTek <see cref="DuplexSession" />.
/// </summary>
/// <param name="session">The <see cref="DuplexSession" />.</param>
/// <param name="timeout">
/// <c>true</c> if the session closed due to a keep-alive timeout,
/// <c>false</c> if the remote side explicitly closed its side
/// of the session.
/// </param>
private void OnSessionClose(DuplexSession session, bool timeout)
{
using (TimedLock.Lock(this))
{
// Terminate any pending Wait() operations with false.
if (waitQueue != null)
{
while (waitQueue.Count > 0)
{
waitQueue.Dequeue().Notify();
}
}
// Terminate any pending Receive() operations with null.
if (receiveQueue != null)
{
while (receiveQueue.Count > 0)
{
receiveQueue.Dequeue().Notify();
}
}
}
}
//---------------------------------------------------------------------
// DuplexSession event handlers
/// <summary>
/// Handles messages received on the underlying LillTek <see cref="DuplexSession" /> session.
/// </summary>
/// <param name="session">The <see cref="DuplexSession" />.</param>
/// <param name="msg">The received LillTek message.</param>
private void OnSessionReceive(DuplexSession session, Msg msg)
{
WcfEnvelopeMsg envelopeMsg = msg as WcfEnvelopeMsg;
if (envelopeMsg == null)
{
return; // Discard anything but WCF messages
}
Enqueue(listener.DecodeMessage(envelopeMsg));
}
private DuplexSession session; // Underlying LillTek Messaging session
/// <summary>
/// Constructor.
/// </summary>
/// <param name="channelManager">The responsible channel manager.</param>
/// <param name="remoteAddress">The remote <see cref="EndpointAddress" />.</param>
/// <param name="via">The first transport hop <see cref="Uri" />.</param>
/// <param name="encoder">The <see cref="MessageEncoder" /> for serializing messages to the wire format.</param>
public OutputSessionChannel(ChannelManagerBase channelManager, EndpointAddress remoteAddress, Uri via, MessageEncoder encoder)
: base(channelManager)
{
ServiceModelHelper.ValidateEP(remoteAddress.Uri);
ServiceModelHelper.ValidateEP(via);
this.ep = ServiceModelHelper.ToMsgEP(remoteAddress.Uri);
if (ep.Broadcast)
{
throw new ArgumentException("Sessionful channels cannot accept broadcast endpoints.", "remoteAddress");
}
this.remoteAddress = remoteAddress;
this.via = via;
this.encoder = encoder;
this.payloadEstimator = new PayloadSizeEstimator(ServiceModelHelper.PayloadEstimatorSampleCount);
this.session = ChannelHost.Router.CreateDuplexSession();
}
private DuplexSession session; // The underlying LillTek session
/// <summary>
/// Constructor.
/// </summary>
/// <param name="channelManager">The responsible channel manager.</param>
/// <param name="localAddress">The local <see cref="EndpointAddress" /> this channel will use to receive requests.</param>
/// <param name="sessionID">The globally unique session ID for this channel.</param>
/// <param name="session">The underlying LillTek <see cref="DuplexSession" />.</param>
public InputSessionChannel(ChannelManagerBase channelManager, EndpointAddress localAddress, string sessionID, DuplexSession session)
: base(channelManager, sessionID)
{
this.maxReceiveQueueSize = ServiceModelHelper.MaxAcceptedMessages; // $todo(jeff.lill): Hardcoding this
this.bkTaskInterval = ServiceModelHelper.DefaultBkTaskInterval; // and this
this.listener = (InputSessionChannelListener)channelManager;
this.localAddress = localAddress;
this.msgQueue = new LimitedQueue <Message>(maxReceiveQueueSize);
this.waitQueue = new QueueArray <AsyncResult <bool, object> >();
this.receiveQueue = new QueueArray <AsyncResult <Message, object> >();
this.session = session;
// Initialize the underlying LillTek session event handlers
session.ReceiveEvent += new DuplexReceiveDelegate(OnSessionReceive);
session.QueryEvent += new DuplexQueryDelegate(OnSessionQuery);
session.CloseEvent += new DuplexCloseDelegate(OnSessionClose);
}
/// <summary>
/// Handles querues received on the underlying LillTek <see cref="DuplexSession" /> session.
/// </summary>
/// <param name="session">The <see cref="DuplexSession" />.</param>
/// <param name="msg">The received LillTek query message.</param>
/// <param name="isAsync">Returns as <c>true</c> if the query will be completed asynchronously.</param>
private Msg OnSessionQuery(DuplexSession session, Msg msg, out bool isAsync)
{
// This channel type does not support queries.
throw new NotImplementedException(string.Format("[{0}] does not support queries.", this.GetType().FullName));
}
/// <summary>
/// Handles remote side closure of the underlying LillTek <see cref="DuplexSession" />.
/// </summary>
/// <param name="session">The <see cref="DuplexSession" />.</param>
/// <param name="timeout">
/// <c>true</c> if the session closed due to a keep-alive timeout,
/// <c>false</c> if the remote side explicitly closed its side
/// of the session.
/// </param>
private void OnSessionClose(DuplexSession session, bool timeout)
{
// This is a NOP for this channel type.
}
//---------------------------------------------------------------------
// DuplexSession event handlers
/// <summary>
/// Handles messages received on the underlying LillTek <see cref="DuplexSession" /> session.
/// </summary>
/// <param name="session">The <see cref="DuplexSession" />.</param>
/// <param name="msg">The received LillTek message.</param>
private void OnSessionReceive(DuplexSession session, Msg msg)
{
throw new InvalidOperationException(string.Format("[{0}] does not support message reception.", this.GetType().FullName));
}