/// <summary>
/// Checks if server at the given location is alive
/// </summary>
/// <param name="serverUrl">Server URL</param>
/// <returns>True if the server is alive; false otherwise.</returns>
public bool TryConnection(string serverUrl, bool tryRemove)
{
//Console.WriteLine("Trying connection " + serverUrl + ": " + tryRemove);
TSMan.CheckFreeze();
TSMan.CheckDelay();
if (serverUrl.Equals(TSMan.URL))
{
//Console.WriteLine("Return false #2");
return(true);
}
// Get the reference for the tuple space server
ITSpaceServer server = (ITSpaceServer)Activator.GetObject(typeof(ITSpaceServer), serverUrl);
// Ping server
if (server == null)
{
return(false);
}
PingDelegate del = new PingDelegate(server.Ping);
IAsyncResult asyncResult = del.BeginInvoke(TSMan.URL, null, null);
asyncResult.AsyncWaitHandle.WaitOne(5000, false);
if (asyncResult.IsCompleted)
{
try
{
del.EndInvoke(asyncResult);
//Console.WriteLine("Return true");
return(true);
}
catch (Exception)
{
if (tryRemove)
{
TryRemoveFromView(serverUrl);
}
//Console.WriteLine("Return false #2");
return(false);
}
}
if (tryRemove)
{
TryRemoveFromView(serverUrl);
}
//Console.WriteLine("Return false #3");
return(false);
}
private void DoPing(string remotingEndpointUrl)
{
var remotingEndpoint = GetRemoteEndpoint(remotingEndpointUrl);
PingDelegate pingDelegate = remotingEndpoint.Ping;
var asyncResult = pingDelegate.BeginInvoke(null, null);
pingDelegate.EndInvoke(asyncResult);
}
private void pingCallback(IAsyncResult ar)
{
try
{
PingDelegate aPingDelegate = (PingDelegate)ar.AsyncState;
aPingDelegate.EndInvoke(ar);
}
catch
{ }
}