public override int ExecuteAndReturn()
{
Guard.AssertNotNull(this.CurrentWork);
return(HandleWork <RepositoryEvent>(this.Console, this.CurrentWork, this.Logger, (w, i) =>
{
string key = w.GetKey(i);
return CreateEvents(key, (sf) =>
{
return RepositoryListSnapshotBuilder.CreateFileSnapshotFromRequest(sf, ExtractRepositoriesByOwner(w.AccessToken, i));
}
, (sf2) =>
{
bool exists = w.Repository.TryPull(key, sf2);
this.Logger.LogTrace("GetLastSnapshot.SnapshotFilename={0} (Exists={1})", key, exists);
if (exists)
{
ITableSnapshotBuilder builder = RepositoryListSnapshotBuilder.CreateFromFile(sf2);
return builder;
}
else
{
return RepositoryListSnapshotBuilder.EmptySnapshot();
}
}
, w.Repository, this.PersistLastSnapshot, this.Logger, (dr, et)
=> EventFactory.CreateRepositoryEvent(dr, et)
);
}));
}
public static IEvent[] CreateEvents(string key, Func <string, ITableSnapshotBuilder> currentQuerySnapshotBuilderDelegate, Func <string, ITableSnapshotBuilder> lastSnapshotBuilderDelegate, SnapshotRepository snapshotRepository, bool persistAsLastSnapshot, ILogger logger, Func <IDataRecord, EventType, IEvent> factoryCallback)
{
Guard.ArgumentNotNullOrEmptyString(key, nameof(key));
Guard.ArgumentNotNull(currentQuerySnapshotBuilderDelegate, nameof(currentQuerySnapshotBuilderDelegate));
Guard.ArgumentNotNull(lastSnapshotBuilderDelegate, nameof(lastSnapshotBuilderDelegate));
Guard.AssertNotNull(logger);
Guard.AssertNotNull(snapshotRepository);
List <IEvent> events = new List <IEvent>();
using (DisposableFile temporarySnapshot = DisposableFile.GetTempFile())
{
Task <ITableSnapshot> queryNow = Task.Factory.StartNew <ITableSnapshot>(() =>
{
ITableSnapshotBuilder builder = currentQuerySnapshotBuilderDelegate(temporarySnapshot.Path);
ITableSnapshot snapShotFromRequest = builder.Build();
return(snapShotFromRequest);
});
Task <ITableSnapshot> lastSnapshot1 = Task.Factory.StartNew <ITableSnapshot>(() =>
{
string localTempFile = Path.GetTempFileName(); //DELETE The File at the end ??
ITableSnapshotBuilder builder = lastSnapshotBuilderDelegate(localTempFile);
ITableSnapshot snapShotFromRequest = builder.Build();
return(snapShotFromRequest);
});
int msTimeoutLoggingSteps = 1000;
while (Task.WaitAll(new Task[] { queryNow, lastSnapshot1 }, msTimeoutLoggingSteps) == false)
{
logger.LogTrace("CreateEvents.Wait-Loop.{0}ms for '{1}'", msTimeoutLoggingSteps, key);
}
try
{
TableDiffByLookup differ = new TableDiffByLookup(lastSnapshot1.Result, queryNow.Result);
differ.DifferencesDelegate = (deletedRecord, inserted) =>
{
EventType et = EventType.Created;
IDataRecord template = inserted;
if ((deletedRecord != null) && (inserted != null))
{
et = EventType.Modified;
template = inserted;
}
if ((deletedRecord != null) && (inserted == null))
{
et = EventType.Deleted;
template = deletedRecord;
//RepositoryTableSnapshot.CreatedAtFieldName
}
if (et != EventType.Modified)
{
//IEvent ev = //EventFactory.CreateRepositoryEvent(template, et);
IEvent ev = factoryCallback(template, et);
Guard.AssertNotNull(ev);
events.Add(ev);
}
else
{
// we ignore modifications!
}
};
differ.Execute();
}
finally
{
if (queryNow.IsCompletedSuccessfully())
{
queryNow.Result.Dispose();
}
if (lastSnapshot1.IsCompletedSuccessfully())
{
lastSnapshot1.Result.Dispose();
}
}
if (persistAsLastSnapshot)
{
snapshotRepository.Push(key, temporarySnapshot.Path);
}
else
{
logger.LogInformation("Snapshot {0} NOT persited!", key);
}
} //using temporary snapshotfile disposable
return(events.ToArray());
//throw new NotImplementedException();
}