/// <summary>
/// Sends a ChannelDescribe message to a producer with the specified URIs.
/// </summary>
/// <param name="uris">The list of URIs.</param>
/// <returns>The sent message on success; <c>null</c> otherwise.</returns>
public virtual EtpMessage <ChannelDescribe> ChannelDescribe(IList <string> uris)
{
var body = new ChannelDescribe()
{
Uris = uris ?? new List <string>()
};
return(SendRequest(body, isLongLived: true));
}
/// <summary>
/// Sends a ChannelDescribe message to a producer with the specified URIs.
/// </summary>
/// <param name="uris">The list of URIs.</param>
/// <returns>The message identifier.</returns>
public virtual long ChannelDescribe(IList <string> uris)
{
var header = CreateMessageHeader(Protocols.ChannelStreaming, MessageTypes.ChannelStreaming.ChannelDescribe);
var channelDescribe = new ChannelDescribe()
{
Uris = uris
};
return(Session.SendMessage(header, channelDescribe));
}
/// <summary>
/// Handles the ChannelDescribe message from a consumer.
/// </summary>
/// <param name="header">The message header.</param>
/// <param name="channelDescribe">The ChannelDescribe message.</param>
protected virtual void HandleChannelDescribe(IMessageHeader header, ChannelDescribe channelDescribe)
{
var args = Notify(OnChannelDescribe, header, channelDescribe, new List <ChannelMetadataRecord>());
HandleChannelDescribe(args);
if (!args.Cancel)
{
ChannelMetadata(header, args.Context);
}
}
/// <summary>
/// Handles the Start message from a consumer.
/// </summary>
/// <param name="message">The Start message.</param>
protected virtual void HandleStart(EtpMessage <Start> message)
{
MaxDataItems = message.Body.MaxDataItems;
MaxMessageRate = message.Body.MaxMessageRate;
if (Capabilities.SimpleStreamer ?? false) // Treat the start message as the subscription for simple streamers
{
var describe = new ChannelDescribe {
Uris = new List <string> {
EtpUri.RootUri11
}
};
TryRegisterSubscriptions(message, describe.GetSubscriptions(Session.SessionId).ToMap(), nameof(describe.Uris));
}
HandleRequestMessage(message, OnStart, HandleStart);
}
