/// <summary>
/// Remove a client from the client manager
/// Thread safe
/// </summary>
/// <param name="client">indicating the client</param>
/// <param name="purge">indicating whether the client needs purge</param>
private SessionPersistCounter RemoveClient(BrokerClient client, bool purge)
{
bool flag;
SessionPersistCounter counter = null;
lock (this.clientDic)
{
client.AllRequestDone -= new EventHandler(this.Client_AllRequestDone);
client.ClientDisconnected -= new EventHandler(this.Client_ClientDisconnected);
// Remove the client from client dic
this.clientDic.Remove(client.ClientId);
if (purge)
{
counter = client.DeleteQueue();
}
client.Dispose();
flag = this.clientDic.Count == 0;
}
if (flag)
{
this.stateManager.AllClientsDisconnected();
}
this.CheckIfAllRequestDone();
return(counter);
}
/// <summary>
/// Triggered when a client is disconnected
/// </summary>
/// <param name="sender">indicating the client</param>
/// <param name="e">indicating the event args</param>
private void Client_ClientDisconnected(object sender, EventArgs e)
{
BrokerClient client = sender as BrokerClient;
Debug.Assert(client != null, "[BrokerClientManager] ClientDisconnected Event: Sender should be the BrokerClient type.");
BrokerTracing.TraceVerbose("[BrokerClientManager] Remove client {0}", client.ClientId);
this.RemoveClient(client, false);
}
/// <summary>
/// Add a new client
/// </summary>
/// <param name="clientId">indicating the client id</param>
/// <returns>return the new client</returns>
private BrokerClient AddNewClient(string clientId, string userName)
{
BrokerClient client = new BrokerClient(clientId, userName, this.queueFactory, this.observer, this.stateManager, this.monitor, this.sharedData);
client.AllRequestDone += new EventHandler(this.Client_AllRequestDone);
client.ClientDisconnected += new EventHandler(this.Client_ClientDisconnected);
this.clientDic.Add(clientId, client);
BrokerTracing.TraceVerbose("[BrokerClientManager] Add new client {0}", clientId);
this.stateManager.ClientConnected();
this.monitor.ClientConnected();
return(client);
}
/// <summary>
/// Purge the client
/// </summary>
/// <param name="clientId">indicating the client id</param>
/// <param name="userName">indicating the user name</param>
public async Task PurgeClient(string clientId, string userName)
{
BrokerClient client = this.GetClient(clientId, userName);
SessionPersistCounter counter = this.RemoveClient(client, true);
if (counter != null)
{
await this.monitor.ClientPurged(counter.FlushedRequestsCount,
counter.FailedRequestsCountField,
counter.ResponsesCountField);
}
}