public void BackupEngineCanStartAndStop()
{
var logger = new MockLogger();
var db = new SQLServerClientDatabase(TestConnectionString, new MockLogger(), SharedMockedCoreSettings);
var engine = new BackupEngine(db, logger, 0, SharedMockedCoreSettings);
engine.BeginStart();
engine.BeginStop();
}
/// <summary>
/// Starts the backup engines.
/// </summary>
/// <returns>True if successful, otherwise false.</returns>
private async Task <bool> StartBackupEnginesAsync()
{
// each backup engine instance shares the same logger.
// this means a single log file for all engine instances- and each engine will prepend its log messages with a context tag.
try
{
BackupEngineInstances = new List <BackupEngine>();
var instanceCountSettingName = ArchivialLibrary.Constants.RuntimeSettingNames.BackupEngineInstancesCount;
var instanceCount = Convert.ToInt32(await ClientDatabase.GetApplicationOptionAsync(instanceCountSettingName).ConfigureAwait(false));
var startupDelaySettingName = ArchivialLibrary.Constants.RuntimeSettingNames.BackupEngineStartupDelayInSeconds;
var startupDelaySeconds = Convert.ToInt32(await ClientDatabase.GetApplicationOptionAsync(startupDelaySettingName).ConfigureAwait(false));
for (int i = 0; i < instanceCount; i++)
{
CoreLog.WriteSystemEvent(
string.Format("Waiting {0} seconds between Backup Engine starts to reduce sudden filesystem load.", startupDelaySeconds),
EventLogEntryType.Information, ArchivialLibrary.Constants.EventIDs.BackupEngineWaitingForNextStart, true);
await Task.Delay(TimeSpan.FromSeconds(startupDelaySeconds)).ConfigureAwait(false);
var engineLog = new Logger(string.Format("{0}-{1}", ArchivialLibrary.Constants.Logging.BackupComponentName, i));
engineLog.Start(
CoreSettings.GetEventlogName(),
CoreSettings.GetEventlogName(),
CoreSettings.GetLogFilesDirectory());
var instance = new BackupEngine(ClientDatabase, engineLog, i, CoreSettings);
instance.Stopped += Backup_Stopped;
instance.BeginStart();
BackupEngineInstances.Add(instance);
CoreLog.WriteSystemEvent(
string.Format("Backup Engine instance {0} has started.", i),
EventLogEntryType.Information, ArchivialLibrary.Constants.EventIDs.StartedBackupEngine, true);
}
return(true);
}
catch (Exception ex)
{
var message = "Failed to start the backup engine.";
var context = CoreLog.GenerateFullContextStackTrace();
CoreLog.WriteSystemEvent(message, ex, context, ArchivialLibrary.Constants.EventIDs.FailedBackupEngine, true);
return(false);
}
}
public void BackupEngineTriggersStoppedEventWhenEngineHasStopped()
{
var logger = new MockLogger();
var db = new SQLServerClientDatabase(TestConnectionString, new MockLogger(), SharedMockedCoreSettings);
var engine = new BackupEngine(db, logger, 0, SharedMockedCoreSettings);
var signalStoppedEvent = new AutoResetEvent(false);
engine.Stopped += (s, e) => { signalStoppedEvent.Set(); };
engine.BeginStart();
engine.BeginStop();
var engineStoppedSignaled = signalStoppedEvent.WaitOne(TimeSpan.FromSeconds(5));
Assert.IsTrue(engineStoppedSignaled);
}
