private async Task OnMessageReceived(IReceiverMessage message)
{
if (message.Headers.TryGetValue("operation", out string operation))
{
if (operation == "create")
{
await Database.CreateAsync(message.StringPayload);
await message.AcknowledgeAsync();
}
else if (operation == "update")
{
await Database.UpdateAsync(message.StringPayload);
await message.AcknowledgeAsync();
}
else if (operation == "delete")
{
await Database.DeleteAsync(message.StringPayload);
await message.AcknowledgeAsync();
}
else
{
// TODO: Send error log - invalid message
await message.RejectAsync();
}
}
else
{
// TODO: Send error log - invalid message
await message.RejectAsync();
}
}
private async Task OnMessageReceivedAsync(IReceiverMessage message)
{
var newSettings = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
try
{
JsonConvert.PopulateObject(message.StringPayload, newSettings);
}
catch
{
await message.RejectAsync().ConfigureAwait(false);
return;
}
var changed = Data.Count != newSettings.Count;
if (!changed)
{
foreach (var newSetting in newSettings)
{
if (Data.ContainsKey(newSetting.Key))
{
if (Data[newSetting.Key] != newSetting.Value)
{
changed = true;
break;
}
}
else
{
changed = true;
break;
}
}
}
if (changed)
{
IDictionary <string, string> previousData = null;
if (message.Headers.TryGetValue("RevertAfterMilliseconds", out int milliseconds) && milliseconds > 0)
{
previousData = Data;
}
Data = newSettings;
OnReload();
if (previousData != null)
{
await message.AcknowledgeAsync().ConfigureAwait(false);
await RevertDataAfterDelay(previousData, milliseconds).ConfigureAwait(false);
return;
}
}
await message.AcknowledgeAsync().ConfigureAwait(false);
}
/// <summary>
/// Indicates that the message could not be successfully processed and should
/// not be redelivered.
/// </summary>
/// <param name="receiverMessage">The message to reject.</param>
public static Task RejectAsync(this IReceiverMessage receiverMessage)
{
if (receiverMessage is null)
{
throw new ArgumentNullException(nameof(receiverMessage));
}
return(receiverMessage.RejectAsync(CancellationToken.None));
}
private async Task OnMessageReceivedAsync(IReceiverMessage message)
{
var newSettings = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
try
{
JsonConvert.PopulateObject(message.StringPayload, newSettings);
}
catch
{
await message.RejectAsync().ConfigureAwait(false);
return;
}
if (IsChanged(newSettings, message.Headers))
{
Data = newSettings;
OnReload();
}
await message.AcknowledgeAsync().ConfigureAwait(false);
}
/// <summary> /// Indicates that the message could not be successfully processed and should /// not be redelivered. /// </summary> /// <param name="receiverMessage">The message to reject.</param> public static Task RejectAsync(this IReceiverMessage receiverMessage) => receiverMessage.RejectAsync(CancellationToken.None);
public static void Reject(this IReceiverMessage receiverMessage) => Sync(() => receiverMessage.RejectAsync());
