I'm working on porting an old app to .net6, and ran into an issue with registrering multiple sagas with masstransit.
services.AddMassTransit<IProcessManagerBus>(busCfg =>
{
busCfg.AddSagaStateMachine<OrderPM, OrderPMState>()
.EntityFrameworkRepository<OrderPMState>(efConfig =>
{
efConfig.ConcurrencyMode = ConcurrencyMode.Optimistic;
efConfig.DatabaseFactory(() => new OrderStateDbContext(configuration.GetConnectionString("DB")));
});
busCfg.AddSagaStateMachine<CsaLoginPM, CsaLoginPMState>()
.EntityFrameworkRepository<CsaLoginPMState>(efConfig =>
{
efConfig.ConcurrencyMode = ConcurrencyMode.Optimistic;
efConfig.DatabaseFactory(() => new CsaLoginStateDbContext(configuration.GetConnectionString("DB")));
});
busCfg.UsingRabbitMq((context, rabbitCfg) =>
{
rabbitCfg.UseJsonSerializer();
rabbitCfg.Host(new Uri(configuration.GetValue<string>("messaging:pm-bus:host-address")), hostCfg =>
{
hostCfg.Username(configuration.GetValue<string>("messaging:pm-bus:username"));
hostCfg.Password(configuration.GetValue<string>("messaging:pm-bus:password"));
rabbitCfg.ReceiveEndpoint(configuration.GetValue<string>("messaging:pm-bus:receive-queue"), epCfg =>
{
epCfg.PrefetchCount = 10;
epCfg.UseRetry(retryConfig => retryConfig.Exponential(5, TimeSpan.FromMilliseconds(500), TimeSpan.FromMinutes(1), TimeSpan.FromSeconds(1)));
epCfg.ConfigureSagas(context);
});
});
});
});
The OrderPMState works fine, but the CsaLoginPMState gives the following error when triggered: System.InvalidOperationException: The entity type CsaLoginPMState is not part of the model for the current context.
If I comment out the registration of the OrderPMState, the CsaLoginPMState works fine. I suspect, that the 2 sagas are using the same DbContext, despite being registered with their individual DbContext.
OrderStateDbContext
public class OrderStateDbContext : SagaDbContext
{
public OrderStateDbContext(string nameOrConnectionString)
: base(nameOrConnectionString)
{
}
protected override IEnumerable<ISagaClassMap> Configurations
{
get { yield return new OrderPMStateMapping(); }
}
}
CsaLoginStateDbContext
public class CsaLoginStateDbContext : SagaDbContext
{
public CsaLoginStateDbContext(string nameOrConnectionString)
: base(nameOrConnectionString)
{
}
protected override IEnumerable<ISagaClassMap> Configurations
{
get { yield return new CsaLoginPMStateMapping(); }
}
}
The old version of the app used AutoFac, and the registration was done like this:
builder.Register(x =>
EntityFrameworkSagaRepository<OrderPMState>.CreateOptimistic(() => new OrderStateDbContext(_configuration.GetConnectionString("DB"))))
.As<ISagaRepository<OrderPMState>>().SingleInstance();
builder.Register(x =>
EntityFrameworkSagaRepository<CsaLoginPMState>.CreateOptimistic(() => new CsaLoginStateDbContext(_configuration.GetConnectionString("DB"))))
.As<ISagaRepository<CsaLoginPMState>>().SingleInstance();
Am I missing something?
When using a DbContext
, you should be using one of the two configuration methods that are specifically designed for use with DbContext
.
busCfg.AddSagaStateMachine<CsaLoginPM, CsaLoginPMState>()
.EntityFrameworkRepository<CsaLoginPMState>(efConfig =>
{
efConfig.ConcurrencyMode = ConcurrencyMode.Optimistic;
efConfig.AddDbContext<DbContext, CsaLoginStateDbContext>((provider,builder) =>
{
builder.UseSqlServer(configuration.GetConnectionString("DB"), m =>
{
m.MigrationsAssembly(Assembly.GetExecutingAssembly().GetName().Name);
m.MigrationsHistoryTable($"__{nameof(CsaLoginStateDbContext)}");
});
});
});
Or you can add the DbContext separately and use that existing DbContext in the saga:
services.AddDbContext<CsaLoginStateDbContext>(builder =>
builder.UseSqlServer(configuration.GetConnectionString("DB"), m =>
{
m.MigrationsAssembly(Assembly.GetExecutingAssembly().GetName().Name);
m.MigrationsHistoryTable($"__{nameof(CsaLoginStateDbContext)}");
}));
services.AddMassTransit(x =>
{
x.AddSagaRepository<JobSaga>()
.EntityFrameworkRepository(r =>
{
r.ConcurrencyMode = ConcurrencyMode.Optimistic;
r.ExistingDbContext<CsaLoginStateDbContext>();
});
});
This is all covered in the documentation.