public async Task <IEnumerable <FakeEntity> > GetListe2Async(ClaimsPrincipal user)
{
_logger.LogInformation("GetListe2Async");
return(await _cache.CacheLoadItems(() => _entityStore.LoadItemsAsync <FakeEntity>(),
CacheKeys.Create <FakeEntity>("liste2")));
}
public async Task <IEnumerable <FakeEntity> > GetListe3Async(ClaimsPrincipal user, CancellationToken cancellationToken)
{
_logger.LogInformation("GetListe3Async");
var items = await _cache.LoadSetItems <FakeEntity>(
CacheKeys.Create <FakeEntity>("set")
, x => true, cancellationToken : cancellationToken);
return(items);
}
private async Task UpdateInitializationStatusAsync(CancellationToken cancellationToken, string projectorId, string status, string statusText)
{
cancellationToken.ThrowIfCancellationRequested();
await _cache.RemoveByPrefixAsync(CacheKeys.Create <ProjectionInitializationStatus>());
var statusItem = await _entityStore.LoadAsync <ProjectionInitializationStatus>(projectorId, cancellationToken);
statusItem.Entity.Status = status;
statusItem.Entity.StatusText = statusText;
await _entityStore.SaveAsync(statusItem, cancellationToken);
}
public async Task StartAsync(CancellationToken cancellationToken)
{
_logger.LogInformation("Starting InitializeAsync");
var sw = Stopwatch.StartNew();
foreach (var projector in _projectors)
{
if (string.IsNullOrEmpty(projector.StreamName))
{
throw new InvalidOperationException($"Empty Stream in Projector: {projector.GetType().FullName}");
}
}
var streamsToCheck = _projectors.Select(x => x.StreamName).Distinct().ToArray();
foreach (var s in streamsToCheck)
{
_logger.LogDebug("Preparing Stream {StreamName}", s);
await InsertEmptyDomainEventIfStreamIsEmpty(s);
}
foreach (var projector in _projectors)
{
if (projector != null)
{
var projectorId = projector.GetType().FullName;
await _cache.RemoveByPrefixAsync(CacheKeys.Create <ProjectionInitializationStatus>());
var statusItem = await _entityStore.LoadAsync <ProjectionInitializationStatus>(projectorId, cancellationToken);
if (statusItem.IsNew)
{
var entity = statusItem.Entity;
entity.ProjectorId = projectorId;
entity.StreamName = projector.StreamName;
entity.Status = ProjectionInitializationStatus.StatusNew;
entity.ModifiedOnUtc = DateTime.UtcNow;
await _entityStore.SaveAsync(statusItem, cancellationToken);
}
}
}
var tasks = new List <Task>();
foreach (var projector in _projectors)
{
//await InitProjectorInternal(cancellationToken, projector);
var t = InitProjectorInternal(cancellationToken, projector);
tasks.Add(t);
}
await Task.WhenAll(tasks);
_logger.LogInformation("EventStore Projection Initializer Finished in {Elapsed:0.0000} ms", sw.ElapsedMilliseconds);
}
public async Task StartAsync(CancellationToken cancellationToken)
{
_logger.LogInformation("Starting InitializeAsync");
var sw = Stopwatch.StartNew();
foreach (var projector in _projectors)
{
if (string.IsNullOrEmpty(projector.StreamName))
{
throw new InvalidOperationException($"Empty Stream in Projector: {projector.GetType().FullName}");
}
}
var streamsToCheck = _projectors.Select(x => x.StreamName).Distinct().ToArray();
await Task.WhenAll(streamsToCheck.Select(s =>
{
_logger.LogDebug("Preparing Stream {StreamName}", s);
return(InsertEmptyDomainEventIfStreamIsEmpty(s));
})).ConfigureAwait(false);
await _cache.RemoveByPrefixAsync(CacheKeys.Create <ProjectionInitializationStatus>()).ConfigureAwait(false);
await Task.WhenAll(_projectors.Select(async projector =>
{
var projectorId = projector.GetType().FullName;
var statusItem = await _entityStore.LoadAsync <ProjectionInitializationStatus>(projectorId, cancellationToken).ConfigureAwait(false);
if (statusItem.IsNew)
{
var entity = statusItem.Entity;
entity.ProjectorId = projectorId;
entity.StreamName = projector.StreamName;
entity.Status = ProjectionInitializationStatus.StatusNew;
entity.ModifiedOnUtc = DateTime.UtcNow;
await _entityStore.SaveAsync(statusItem, cancellationToken).ConfigureAwait(false);
}
}));
var contexte = await Task.WhenAll(_projectors.Select(projector =>
{
return(Policy.Handle <Exception>().RetryAsync(2, (exception, i) =>
_logger.LogError(exception, "Retry {Retry}", i)).ExecuteAsync(() => InitProjectorInternal(cancellationToken, projector)));
})).ConfigureAwait(false);
await Task.WhenAll(contexte.Select(ctx => StartProjectorInternal(cancellationToken, ctx))).ConfigureAwait(false);
_logger.LogInformation("EventStore Projection Initializer Finished in {Elapsed} ms", sw.ElapsedMilliseconds);
}
public void CacheKeyTest()
{
var strings = new List <string> {
"s1", "s2"
};
CacheKeys.Create <MyEntity1>().Should().Be(MyEntity1.TypeKey);
CacheKeys.Create <MyEntity1>(strings).Should().Be($"{MyEntity1.TypeKey}:s1:s2");
CacheKeys.Create <MyEntity1>("s1").Should().Be($"{MyEntity1.TypeKey}:s1");
CacheKeys.Create <MyEntity1>("s1", 1, 2).Should().Be($"{MyEntity1.TypeKey}:s1:1:2");
CacheKeys.Create <MyEntity1>(1, 2, strings).Should().Be($"{MyEntity1.TypeKey}:1:2:s1:s2");
CacheKeys.Create <MyEntity1>("sx", 1, 2, strings).Should().Be($"{MyEntity1.TypeKey}:sx:1:2:s1:s2");
CacheKeys.Create <MyEntity1>("sx", strings).Should().Be($"{MyEntity1.TypeKey}:sx:s1:s2");
CacheKeys.Create <MyEntity1>("sx", strings, strings).Should().Be($"{MyEntity1.TypeKey}:sx:s1:s2:s1:s2");
CacheKeys.Create <MyEntity1>("sx", "sy", strings).Should().Be($"{MyEntity1.TypeKey}:sx:sy:s1:s2");
CacheKeys.Create <MyEntity1>("sx", "sy").Should().Be($"{MyEntity1.TypeKey}:sx:sy");
CacheKeys.Create <MyEntity1>("sx", "sy", "sz").Should().Be($"{MyEntity1.TypeKey}:sx:sy:sz");
CacheKeys.Create <MyEntity1>("sx", "sy", "sz", "szz").Should().Be($"{MyEntity1.TypeKey}:sx:sy:sz:szz");
CacheKeys.Create <MyEntity1>("sx", "sy", "sz", strings).Should().Be($"{MyEntity1.TypeKey}:sx:sy:sz:s1:s2");
CacheKeys.Create <MyEntity1>("sx", "sy", 1, 2).Should().Be($"{MyEntity1.TypeKey}:sx:sy:1:2");
CacheKeys.Create <MyEntity1>("sx", "sy", 1, 2, strings).Should().Be($"{MyEntity1.TypeKey}:sx:sy:1:2:s1:s2");
CacheKeys.Create <MyEntity1>("sx", "sy", "sz", 1, 2).Should().Be($"{MyEntity1.TypeKey}:sx:sy:sz:1:2");
}
private async Task InitProjectorInternal(CancellationToken cancellationToken, IReadModelProjector projector)
{
var projectorId = projector.GetType().FullName;
projector.Initialize(cancellationToken);
_logger.LogInformation("Initialize Projector {ProjectorName}", projectorId);
await UpdateInitializationStatusAsync(cancellationToken, projectorId, ProjectionInitializationStatus.StatusPending, "Starting");
var context =
new EventStoreProjectionContext(_loggerFactory, _connectionProvider, _entityStore, projector)
{
StreamName = projector.StreamName,
ProjectorId = projectorId
};
projector.Context = context;
await _cache.RemoveByPrefixAsync(CacheKeys.Create <ProjectionStatus>());
var status = await _entityStore.LoadAsync <ProjectionStatus>(projectorId, cancellationToken);
context.Status = status.Entity;
if (status.IsNew)
{
_logger.LogDebug("Starting Empty Initialization for Projector {Projector}", projectorId);
await UpdateInitializationStatusAsync(cancellationToken, projectorId, ProjectionInitializationStatus.StatusPending, "StartingInitialization");
await context.StartInitializationModeAsync();
await UpdateInitializationStatusAsync(cancellationToken, projectorId, ProjectionInitializationStatus.StatusPending, "InitializationStartingStreamReading");
try
{
var tempStatus = await ReadStreamAsync(context.StreamName, context, cancellationToken);
if (tempStatus != null)
{
status.Entity.LastCheckPoint = tempStatus.LastCheckPoint;
status.Entity.ModifiedOnUtc = tempStatus.ModifiedOnUtc;
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error ReadStreamAsync");
throw;
}
await UpdateInitializationStatusAsync(cancellationToken, projectorId, ProjectionInitializationStatus.StatusPending, "InitializationStartingCopy");
try
{
await projector.CopyEntitiesAsync(context.EntityStore, _entityStore, cancellationToken);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error CopyEntitites");
throw;
}
await context.StopInitializationModeAsync();
await _entityStore.SaveAsync(status, cancellationToken);
await UpdateInitializationStatusAsync(cancellationToken, projectorId, ProjectionInitializationStatus.StatusPending, "InitializationFinished");
}
cancellationToken.ThrowIfCancellationRequested();
_logger.LogDebug("Starting Subscription on EventStore for Projector {Projector}", context.ProjectorId);
await context.StartSubscription(cancellationToken);
await UpdateInitializationStatusAsync(cancellationToken, projectorId, ProjectionInitializationStatus.StatusReady, "Startet");
}
