/// <summary>
/// This is the main entry point for your service replica.
/// This method executes when this replica of your service becomes primary and has write status.
/// </summary>
/// <param name="cancellationToken">Canceled when Service Fabric needs to shut down this service replica.</param>
protected override async Task RunAsync(CancellationToken cancellationToken)
{
await StateManager.GetOrAddAsync <IReliableDictionary <string, string> >("myConnections").ConfigureAwait(false);
MyHosts = await StateManager.GetOrAddAsync <IReliableDictionary <string, string> >("myHosts").ConfigureAwait(false);
MyHosts.DictionaryChanged += MyHosts_DictionaryChanged;
//load existing host clients and connect
using (var tx = StateManager.CreateTransaction())
{
var e = await MyHosts.CreateEnumerableAsync(tx, EnumerationMode.Unordered);
using (var hosts = e.GetAsyncEnumerator())
{
while (await hosts.MoveNextAsync(cancellationToken))
{
var host = new SignalRClient(hosts.Current.Key, hosts.Current.Value);
await host.ConnectAsync().ConfigureAwait(false);
MyClients.Add(hosts.Current.Key, host);
ServiceEventSource.Current.Message($"Registered and connected to host {host.HostId}");
}
}
}
}
private void Save_Click(object sender, RoutedEventArgs e)
{
// Validate column count.
if (int.TryParse(MyColumnCount.Text, out ColumnCount) == false || ColumnCount < 1 || ColumnCount > 10)
{
var errorWindow = DialogWindow.ErrorWindow("Please enter a valid number of columns (between 1 and 10).");
errorWindow.Owner = this;
errorWindow.ShowDialog();
MyColumnCount.Focus();
MyColumnCount.SelectAll();
return;
}
// Validate favorite name.
if (Favorite.IsTitleInvalid(MyTitle.Text))
{
var errorWindow = DialogWindow.ErrorWindow(Strings.NewFavorite_Error_InvalidName);
errorWindow.Owner = this;
errorWindow.ShowDialog();
MyTitle.Focus();
MyTitle.SelectAll();
return;
}
// Split MyHosts string to array, trim each item, then convert to list. Ensure at least one host was entered.
HostList = MyHosts.Text.Trim().Split(new char[] { ',', '\n' }).Select(host => host.Trim()).ToList();
if (HostList.All(x => string.IsNullOrWhiteSpace(x)))
{
var errorWindow = DialogWindow.ErrorWindow("You have not entered any hosts. Provide at least one host for this favorite set.");
errorWindow.Owner = this;
errorWindow.ShowDialog();
MyHosts.Focus();
MyHosts.SelectAll();
return;
}
// If creating a new favorite: Check and display warning if title already exists.
// If editing a favorite and title has changed: Check and display warning if title already exists.
// If editing a favorite and title has not changed: Proceed with save. No warning displayed.
if ((!IsExisting && Favorite.TitleExists(MyTitle.Text)) ||
(IsExisting && !string.Equals(OriginalTitle, MyTitle.Text) && Favorite.TitleExists(MyTitle.Text)))
{
var warningWindow = DialogWindow.WarningWindow(
message: $"{MyTitle.Text} {Strings.NewFavorite_Warn_AlreadyExists}",
confirmButtonText: Strings.DialogButton_Overwrite);
warningWindow.Owner = this;
if (warningWindow.ShowDialog() == true)
{
// User opted to overwrite existing favorite entry.
SaveFavorite();
}
}
else
{
// Checks passed. Saving.
SaveFavorite();
}
}
public async Task UnregisterSignalRHost(string hostName)
{
using (var tx = StateManager.CreateTransaction())
{
await MyHosts.TryRemoveAsync(tx, hostName).ConfigureAwait(false);
await tx.CommitAsync().ConfigureAwait(false);
}
}
public async Task RegisterSignalRHost(string hostId, string endpoint)
{
using (var tx = StateManager.CreateTransaction())
{
if (MyHosts == null)
{
MyHosts = await StateManager.GetOrAddAsync <IReliableDictionary <string, string> >("myHosts").ConfigureAwait(false);
}
await MyHosts.AddOrUpdateAsync(tx, hostId, endpoint, (k, v) => endpoint).ConfigureAwait(false);
await tx.CommitAsync().ConfigureAwait(false);
if (MyClients.ContainsKey(hostId))
{
MyClients.Remove(hostId);
}
var client = new SignalRClient(hostId, endpoint);
await client.ConnectAsync().ConfigureAwait(false);
MyClients.Add(hostId, client);
}
}