/// <inheritdoc />
public async Task MaintenanceAsync(CancellationToken token)
{
lock (_taskLock)
{
// are we still running the start?
if (!_runningTask?.IsCompleted ?? true)
{
return;
}
}
var factory = await _persister.BeginWrite(token).ConfigureAwait(false);
try
{
const string configParse = "maintenance.parse";
var lastParse = await _persister.Config.GetConfigValueAsync(configParse, DateTime.MinValue, factory, token).ConfigureAwait(false);
// between 3 and 5 hours to prevent running at the same time as others.
var randomHours = (new Random(DateTime.UtcNow.Millisecond)).Next(3, 5);
if ((DateTime.UtcNow - lastParse).TotalHours > randomHours)
{
//
// Do maintenance work
//
_logger.Information("Maintenance files/folders parser");
// save the date and commit ... because the parser needs its own factory.
await _persister.Config.SetConfigValueAsync(configParse, DateTime.UtcNow, factory, token).ConfigureAwait(false);
}
_persister.Commit(factory);
}
catch (Exception e)
{
_persister.Rollback(factory);
_logger.Exception("There was an exception re-parsing the directories.", e);
throw;
}
}
/// <inheritdoc />
public async Task <long> WorkAsync(CancellationToken token)
{
using (_counter.Start())
{
try
{
// get a factory item
var factory = await _persister.BeginWrite(_eventsTimeOutInMs, token).ConfigureAwait(false);
return(await WorkAsync(factory, token).ConfigureAwait(false));
}
catch (TimeoutException)
{
// swallow timeout exceptions...
return(0);
}
}
}
