protected override async Task ExecuteAsync(CancellationToken cancelToken)
{
#region init state
AppState = await ResetState();
Logger.LogDebug($"State initialized: [{AppState.Level}:{AppState.Hash}]");
#endregion
Logger.LogWarning("Observer is started");
while (!cancelToken.IsCancellationRequested)
{
#region wait for updates
try
{
if (!await WaitForUpdatesAsync(cancelToken))
{
break;
}
var head = await Node.GetHeaderAsync();
Logger.LogDebug($"New head is found [{head.Level}:{head.Hash}]");
}
catch (Exception ex)
{
Logger.LogCritical($"Failed to check updates. {ex.Message}");
await Task.Delay(5000);
continue;
}
#endregion
#region apply updates
try
{
if (!await ApplyUpdatesAsync(cancelToken))
{
break;
}
Logger.LogDebug($"Current head [{AppState.Level}:{AppState.Hash}]");
}
catch (BaseException ex) when(ex.RebaseRequired)
{
Logger.LogError($"Failed to apply block: {ex.Message}. Rebase local branch...");
try
{
if (!await RebaseLocalBranchAsync(cancelToken))
{
break;
}
}
catch (Exception exx)
{
Logger.LogCritical($"Failed to rebase branch. {exx.Message}");
AppState = await ResetState();
await Task.Delay(5000);
continue;
}
}
catch (Exception ex)
{
Logger.LogCritical($"Failed to apply updates. {ex.Message}");
AppState = await ResetState();
await Task.Delay(5000);
continue;
}
#endregion
}
Logger.LogWarning("Observer is stoped");
}
protected override async Task ExecuteAsync(CancellationToken cancelToken)
{
try
{
Logger.LogWarning("Observer started");
#region init state
if (!await ResetState(cancelToken))
{
return;
}
Logger.LogInformation($"State initialized: [{AppState.Level}:{AppState.Hash}]");
#endregion
#region init quotes
await InitQuotes();
Logger.LogInformation($"Quotes initialized: [{AppState.QuoteLevel}]");
#endregion
Logger.LogInformation("Synchronization started");
while (!cancelToken.IsCancellationRequested)
{
#region wait for updates
try
{
if (!await WaitForUpdatesAsync(cancelToken))
{
break;
}
var head = await Node.GetHeaderAsync();
Logger.LogDebug($"New head is found [{head.Level}:{head.Hash}]");
}
catch (Exception ex)
{
Logger.LogError($"Failed to check updates. {ex.Message}");
await Task.Delay(3000, CancellationToken.None);
continue;
}
#endregion
#region apply updates
try
{
if (!await ApplyUpdatesAsync(cancelToken))
{
break;
}
Logger.LogDebug($"Current head [{AppState.Level}:{AppState.Hash}]");
}
catch (BaseException ex) when(ex.RebaseRequired)
{
Logger.LogError($"Failed to apply block: {ex.Message}. Rebase local branch...");
if (!await ResetState(cancelToken))
{
break;
}
try
{
if (!await RebaseLocalBranchAsync(cancelToken))
{
break;
}
}
catch (Exception exx)
{
Logger.LogError($"Failed to rebase branch. {exx.Message}");
await Task.Delay(3000, CancellationToken.None);
if (!await ResetState(cancelToken))
{
break;
}
continue;
}
}
catch (Exception ex)
{
Logger.LogError($"Failed to apply updates. {ex.Message}");
await Task.Delay(3000, CancellationToken.None);
if (!await ResetState(cancelToken))
{
break;
}
continue;
}
#endregion
}
}
catch (Exception ex)
{
// should never get here
Logger.LogCritical($"Observer crashed: {ex.Message}");
}
finally
{
Logger.LogWarning("Observer stopped");
}
}