async Task IFilter <ConsumeContext <TMessage> > .Send(ConsumeContext <TMessage> context, IPipe <ConsumeContext <TMessage> > next)
{
Stopwatch timer = Stopwatch.StartNew();
try
{
ISagaQuery <TSaga> query = _queryFactory.CreateQuery(context);
SagaQueryConsumeContext <TSaga, TMessage> queryContext = new SagaQueryConsumeContextProxy <TSaga, TMessage>(context, query);
await Task.Yield();
await _sagaRepository.SendQuery(queryContext, _policy, _messagePipe).ConfigureAwait(false);
await next.Send(context).ConfigureAwait(false);
await context.NotifyConsumed(timer.Elapsed, TypeMetadataCache <TSaga> .ShortName).ConfigureAwait(false);
}
catch (Exception ex)
{
await context.NotifyFaulted(timer.Elapsed, TypeMetadataCache <TSaga> .ShortName, ex).ConfigureAwait(false);
throw;
}
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
var dbContext = _dbContextFactory.CreateScoped(context);
try
{
var lockContext = await _lockStrategy.CreateLockContext(dbContext, query, context.CancellationToken).ConfigureAwait(false);
var repositoryContext = new DbContextSagaRepositoryContext <TSaga, T>(dbContext, context, _consumeContextFactory, _lockStrategy);
await WithinTransaction(dbContext, async() =>
{
var instances = await lockContext.Load().ConfigureAwait(false);
var queryContext = new LoadedSagaRepositoryQueryContext <TSaga, T>(repositoryContext, instances);
await next.Send(queryContext).ConfigureAwait(false);
}).ConfigureAwait(false);
}
finally
{
_dbContextFactory.Release(dbContext);
}
}
public async Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
return(await _collection.Find(query.FilterExpression)
.Project(x => x.CorrelationId)
.ToListAsync()
.ConfigureAwait(false));
}
public Task SendQuery <T>(
ConsumeContext <T> context, ISagaQuery <TSaga> query, ISagaPolicy <TSaga, T> policy,
IPipe <SagaConsumeContext <TSaga, T> > next
) where T : class
{
throw new NotImplementedByDesignException("EventStore saga repository does not support queries");
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, ISagaPolicy <TSaga, T> policy,
IPipe <SagaConsumeContext <TSaga, T> > next)
where T : class
{
try
{
await _repositoryContextFactory.SendQuery(context, query, new SendQuerySagaPipe <TSaga, T>(policy, next)).ConfigureAwait(false);
}
catch (SagaException exception)
{
context.LogFault(this, exception);
throw;
}
catch (DataException exception)
{
context.LogFault(this, exception);
throw;
}
catch (Exception exception)
{
context.LogFault(this, exception);
throw new SagaException(exception.Message, typeof(TSaga), typeof(T), Guid.Empty, exception);
}
}
public static async Task <Guid?> ShouldContainSagaInState <TStateMachine, TInstance>(this ISagaRepository <TInstance> repository,
Expression <Func <TInstance, bool> > expression, TStateMachine machine, State state, TimeSpan timeout)
where TStateMachine : SagaStateMachine <TInstance>
where TInstance : class, SagaStateMachineInstance
{
var querySagaRepository = repository as IQuerySagaRepository <TInstance>;
if (querySagaRepository == null)
{
throw new ArgumentException("The repository must support querying", nameof(repository));
}
var giveUpAt = DateTime.Now + timeout;
ISagaQuery <TInstance> query = machine.CreateSagaQuery(expression, state);
while (DateTime.Now < giveUpAt)
{
var saga = (await querySagaRepository.Find(query).ConfigureAwait(false)).FirstOrDefault();
if (saga != Guid.Empty)
{
return(saga);
}
await Task.Delay(10).ConfigureAwait(false);
}
return(default);
public OptimisticSagaLockContext(DbContext context, ISagaQuery <TSaga> query, CancellationToken cancellationToken, ILoadQueryProvider <TSaga> provider)
{
_context = context;
_query = query;
_cancellationToken = cancellationToken;
_provider = provider;
}
public async Task <SagaRepositoryQueryContext <TSaga> > Query(ISagaQuery <TSaga> query, CancellationToken cancellationToken = default)
{
IReadOnlyList <TSaga> instances = await _session.Query <TSaga>()
.Where(query.FilterExpression)
.ToListAsync(cancellationToken).ConfigureAwait(false);
return(new LoadedSagaRepositoryQueryContext <TSaga>(this, instances));
}
Task ISagaRepository <TSaga> .SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, ISagaPolicy <TSaga, T> policy,
IPipe <SagaConsumeContext <TSaga, T> > next)
{
var interceptPipe = new InterceptPipe <T>(_sagas, _received, next);
var interceptPolicy = new InterceptPolicy <T>(_created, policy);
return(_sagaRepository.SendQuery(context, query, interceptPolicy, interceptPipe));
}
public async Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
IEnumerable <TSaga> sagas = await _client.CreateDocumentQuery <TSaga>(UriFactory.CreateDocumentCollectionUri(_databaseName, _collectionName), _feedOptions)
.Where(query.FilterExpression)
.QueryAsync()
.ConfigureAwait(false);
return(sagas.Select(x => x.CorrelationId));
}
public async Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
// This will not work for Document Db because the .Where needs to look for [JsonProperty("id")], and if you pass in CorrelationId property, the ISaga doesn't have that property.
IEnumerable <TSaga> sagas = await _client.CreateDocumentQuery <TSaga>(UriFactory.CreateDocumentCollectionUri(_databaseName, _collectionName), _feedOptions)
.Where(query.FilterExpression)
.QueryAsync()
.ConfigureAwait(false);
return(sagas.Select(x => x.CorrelationId));
}
public async Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
using (var session = _sessionFactory.OpenSession())
{
return(await session.QueryOver <TSaga>()
.Where(query.FilterExpression)
.Select(x => x.CorrelationId)
.ListAsync <Guid>().ConfigureAwait(false));
}
}
async Task <IEnumerable <Guid> > IQuerySagaRepository <TSaga> .Find(ISagaQuery <TSaga> query)
{
using (var dbContext = _sagaDbContextFactory())
{
return(await dbContext.Set <TSaga>()
.Where(query.FilterExpression)
.Select(x => x.CorrelationId)
.ToListAsync().ConfigureAwait(false));
}
}
public async Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
using (var session = _store.QuerySession())
{
return(await session.Query <TSaga>()
.Where(query.FilterExpression)
.Select(x => x.CorrelationId)
.ToListAsync());
}
}
public async Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
using (var session = OpenSession())
{
return(await session.Query <TSaga>()
.Where(query.FilterExpression)
.Customize(x => x.WaitForNonStaleResultsAsOf(DateTime.Now + TimeSpan.FromMinutes(1)))
.Select(x => x.CorrelationId)
.ToListAsync());
}
}
async Task <IEnumerable <Guid> > IQuerySagaRepository <TSaga> .Find(ISagaQuery <TSaga> query)
{
using (var connection = new SqlConnection(_connectionString))
{
var tableName = GetTableName <TSaga>();
var(whereStatement, parameters) = WhereStatementHelper.GetWhereStatementAndParametersFromExpression(query.FilterExpression);
return
((await connection.QueryAsync <Guid>($"SELECT CorrelationId FROM {tableName} WITH (UPDLOCK, ROWLOCK) {whereStatement}",
parameters).ConfigureAwait(false)).ToList());
}
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
var repositoryContext = new MongoDbSagaRepositoryContext <TSaga, T>(_mongoCollection, context, _factory);
IList <TSaga> instances = await _mongoCollection.Find(query.FilterExpression)
.ToListAsync(repositoryContext.CancellationToken)
.ConfigureAwait(false);
var queryContext = new LoadedSagaRepositoryQueryContext <TSaga, T>(repositoryContext, instances);
await next.Send(queryContext).ConfigureAwait(false);
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
await _sagas.MarkInUse(context.CancellationToken).ConfigureAwait(false);
using var repositoryContext = new InMemorySagaRepositoryContext <TSaga, T>(_sagas, _factory, context);
var matchingInstances = _sagas.Where(query).Select(x => x.Instance.CorrelationId).ToList();
var queryContext = new DefaultSagaRepositoryQueryContext <TSaga, T>(repositoryContext, matchingInstances);
await next.Send(queryContext).ConfigureAwait(false);
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
IEnumerable <TSaga> sagas = await _context.Container.GetItemLinqQueryable <TSaga>()
.Where(query.FilterExpression)
.QueryAsync(context.CancellationToken)
.ConfigureAwait(false);
var repositoryContext = new CosmosSagaRepositoryContext <TSaga, T>(_context, context, _factory);
var queryContext = new DefaultSagaRepositoryQueryContext <TSaga, T>(repositoryContext, sagas.Select(x => x.CorrelationId).ToList());
await next.Send(queryContext).ConfigureAwait(false);
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
using DapperDatabaseContext <TSaga> databaseContext = await CreateDatabaseContext(context.CancellationToken).ConfigureAwait(false);
IEnumerable <TSaga> instances = await databaseContext.QueryAsync(query.FilterExpression, context.CancellationToken).ConfigureAwait(false);
var repositoryContext = new DapperSagaRepositoryContext <TSaga, T>(databaseContext, context, _factory);
var queryContext = new LoadedSagaRepositoryQueryContext <TSaga, T>(repositoryContext, instances);
await next.Send(queryContext).ConfigureAwait(false);
databaseContext.Commit();
}
public Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
using (var scope = new TransactionScope(TransactionScopeOption.RequiresNew))
using (var session = _sessionFactory.OpenSession())
{
IList <Guid> result = session.QueryOver <TSaga>()
.Where(query.FilterExpression)
.Select(x => x.CorrelationId)
.List <Guid>();
scope.Complete();
return(Task.FromResult <IEnumerable <Guid> >(result));
}
}
public IEnumerable <SagaInstance <TSaga> > Where(ISagaQuery <TSaga> query)
{
lock (_lock)
{
IIndexedSagaProperty <TSaga> index = HasIndexFor(query.FilterExpression);
if (index == null)
{
return(_indexById.Where(query.GetFilter()).ToList());
}
var rightValue = GetRightValue(query.FilterExpression);
return(index.Where(rightValue, query.GetFilter()).ToList());
}
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
// This will not work for Document Db because the .Where needs to look for [JsonProperty("id")],
// and if you pass in CorrelationId property, the ISaga doesn't have that property. Can we .Select() it out?
IEnumerable <TSaga> sagas = await _context.Client.CreateDocumentQuery <TSaga>(_context.Collection, _context.FeedOptions)
.Where(query.FilterExpression)
.QueryAsync(context.CancellationToken)
.ConfigureAwait(false);
var repositoryContext = new DocumentDbSagaRepositoryContext <TSaga, T>(_context, context, _factory);
var queryContext = new LoadedSagaRepositoryQueryContext <TSaga, T>(repositoryContext, sagas.ToList());
await next.Send(queryContext).ConfigureAwait(false);
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
using var session = _documentStore.DirtyTrackedSession();
var repositoryContext = new MartenSagaRepositoryContext <TSaga, T>(session, context, _factory);
IReadOnlyList <TSaga> instances = await session.Query <TSaga>()
.Where(query.FilterExpression)
.ToListAsync().ConfigureAwait(false);
var queryContext = new LoadedSagaRepositoryQueryContext <TSaga, T>(repositoryContext, instances.ToList());
await next.Send(queryContext).ConfigureAwait(false);
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
var session = _sessionFactory.OpenSession();
ITransaction transaction = null;
try
{
transaction = session.BeginTransaction();
var repositoryContext = new NHibernateSagaRepositoryContext <TSaga, T>(session, context, _factory);
IList <TSaga> instances = await session.QueryOver <TSaga>()
.Where(query.FilterExpression)
.ListAsync(repositoryContext.CancellationToken)
.ConfigureAwait(false);
var queryContext = new LoadedSagaRepositoryQueryContext <TSaga, T>(repositoryContext, instances);
await next.Send(queryContext).ConfigureAwait(false);
await transaction.CommitAsync(repositoryContext.CancellationToken).ConfigureAwait(false);
}
catch (Exception)
{
if (transaction != null && transaction.IsActive)
{
try
{
await transaction.RollbackAsync(context.CancellationToken).ConfigureAwait(false);
}
catch (Exception rollbackException)
{
LogContext.Warning?.Log(rollbackException, "Failed to rollback transaction");
}
}
throw;
}
finally
{
transaction?.Dispose();
session.Dispose();
}
}
async Task IFilter <ConsumeContext <TMessage> > .Send(ConsumeContext <TMessage> context, IPipe <ConsumeContext <TMessage> > next)
{
Stopwatch timer = Stopwatch.StartNew();
var activity = LogContext.IfEnabled(OperationName.Saga.SendQuery)?.StartActivity(new
{
SagaType = TypeMetadataCache <TSaga> .ShortName,
MessageType = TypeMetadataCache <TMessage> .ShortName
});
try
{
ISagaQuery <TSaga> query = _queryFactory.CreateQuery(context);
SagaQueryConsumeContext <TSaga, TMessage> queryContext = new SagaQueryConsumeContextScope <TSaga, TMessage>(context, query);
await Task.Yield();
await _sagaRepository.SendQuery(queryContext, _policy, _messagePipe).ConfigureAwait(false);
await next.Send(context).ConfigureAwait(false);
await context.NotifyConsumed(timer.Elapsed, TypeMetadataCache <TSaga> .ShortName).ConfigureAwait(false);
}
catch (OperationCanceledException exception)
{
await context.NotifyFaulted(timer.Elapsed, TypeMetadataCache <TSaga> .ShortName, exception).ConfigureAwait(false);
if (exception.CancellationToken == context.CancellationToken)
{
throw;
}
throw new ConsumerCanceledException($"The operation was cancelled by the consumer: {TypeMetadataCache<TSaga>.ShortName}");
}
catch (Exception ex)
{
await context.NotifyFaulted(timer.Elapsed, TypeMetadataCache <TSaga> .ShortName, ex).ConfigureAwait(false);
throw;
}
finally
{
activity?.Stop();
}
}
public async Task <SagaRepositoryQueryContext <TSaga> > Query(ISagaQuery <TSaga> query, CancellationToken cancellationToken = default)
{
QueryRequestOptions queryOptions = null;
if (_context.QueryRequestOptions != null)
{
queryOptions = new QueryRequestOptions();
_context.QueryRequestOptions?.Invoke(queryOptions);
}
// This will not work for Document Db because the .Where needs to look for [JsonProperty("id")],
// and if you pass in CorrelationId property, the ISaga doesn't have that property. Can we .Select() it out?
IEnumerable <TSaga> instances = await _context.Container.GetItemLinqQueryable <TSaga>(requestOptions : queryOptions)
.Where(query.FilterExpression)
.QueryAsync(cancellationToken)
.ConfigureAwait(false);
return(new LoadedSagaRepositoryQueryContext <TSaga>(this, instances));
}
public async Task SendQuery <T>(ConsumeContext <T> context, ISagaQuery <TSaga> query, IPipe <SagaRepositoryQueryContext <TSaga, T> > next)
where T : class
{
var dbContext = _dbContextFactory.CreateScoped(context);
try
{
async Task Send()
{
SagaLockContext <TSaga> lockContext = await _lockStrategy.CreateLockContext(dbContext, query, context.CancellationToken).ConfigureAwait(false);
var repositoryContext = new DbContextSagaRepositoryContext <TSaga, T>(dbContext, context, _consumeContextFactory, _lockStrategy);
await WithinTransaction(dbContext, context.CancellationToken, async() =>
{
IList <TSaga> instances = await lockContext.Load().ConfigureAwait(false);
var queryContext = new LoadedSagaRepositoryQueryContext <TSaga, T>(repositoryContext, instances);
await next.Send(queryContext).ConfigureAwait(false);
}).ConfigureAwait(false);
}
var executionStrategy = dbContext.Database.CreateExecutionStrategy();
if (executionStrategy is ExecutionStrategy)
{
await executionStrategy.ExecuteAsync(Send).ConfigureAwait(false);
}
else
{
await Send().ConfigureAwait(false);
}
}
finally
{
await _dbContextFactory.ReleaseAsync(dbContext).ConfigureAwait(false);
}
}
/// <summary>
/// Waits until a saga exists with the specified correlationId in the specified state
/// </summary>
/// <param name="correlationId"></param>
/// <param name="state">The expected state</param>
/// <param name="timeout"></param>
/// <returns></returns>
public async Task <Guid?> Exists(Guid correlationId, State state, TimeSpan?timeout = default)
{
if (QuerySagaRepository == null)
{
throw new InvalidOperationException("The repository does not support Query operations");
}
var giveUpAt = DateTime.Now + (timeout ?? TestTimeout);
ISagaQuery <TInstance> query = _stateMachine.CreateSagaQuery(x => x.CorrelationId == correlationId, state);
while (DateTime.Now < giveUpAt)
{
var saga = (await QuerySagaRepository.Find(query).ConfigureAwait(false)).FirstOrDefault();
if (saga != Guid.Empty)
{
return(saga);
}
await Task.Delay(10).ConfigureAwait(false);
}
return(default);
public Task <IEnumerable <Guid> > Find(ISagaQuery <TSaga> query)
{
return(Task.FromResult(_sagas.Where(query).Select(x => x.Instance.CorrelationId)));
}