问题描述
我们正在使用具有自动别名功能的Masstransit和InMemoryRepository来实现传奇持久性。我们大约配置了3个状态机,并且工作正常。我们最近从InMemoryRepository更改为EFCore以实现持久性。这导致只有第一个配置的状态机才能正常工作。休息所有状态机甚至都没有进入Initially事件。需要帮助以了解实施是否正确。下面是代码详细信息:
masstransit状态机设置
services.AddMasstransit(x =>
{
x.AddBus(provider => Masstransit.Bus.Factory.CreateUsingRabbitMq(cfg =>
{
cfg.Host(hostUri,hst =>
{
hst.Username(appSettings.RabbitMQ.Username);
hst.Password(appSettings.RabbitMQ.Password);
});
cfg.ReceiveEndpoint("microservice-response",e =>
{
AddConsumers(e,provider);
e.ConfigureSaga<ServiceRequest1RegisterState>(provider);
e.ConfigureSaga<ServiceRequest1UpdateState>(provider);
e.ConfigureSaga<ServiceRequest1ApproveState>(provider);
});
}));
////x.AddSagaStateMachine<ServiceRequest1RegisterStateMachine,ServiceRequest1RegisterState>()
//// .InMemoryRepository();
////x.AddSagaStateMachine<ServiceRequest1UpdateStateMachine,ServiceRequest1UpdateState>()
//// .InMemoryRepository();
////x.AddSagaStateMachine<ServiceRequest1ApproveStateMachine,ServiceRequest1ApproveState>()
//// .InMemoryRepository();
x.AddSagaStateMachine<ServiceRequest1RegisterStateMachine,ServiceRequest1RegisterState>()
.EntityFrameworkRepository(r =>
{
r.ConcurrencyMode = ConcurrencyMode.pessimistic; // or use Optimistic,which requires RowVersion
r.AddDbContext<DbContext,ServiceRequest1RegisterStateDbContext>((provider,builder) =>
{
builder.UsesqlServer(configuration.GetConnectionString("StateDBConnection"),m =>
{
m.MigrationsAssembly(Assembly.GetExecutingAssembly().GetName().Name);
m.MigrationsHistoryTable($"__{nameof(ServiceRequest1RegisterStateDbContext)}");
});
});
});
x.AddSagaStateMachine<ServiceRequest1UpdateStateMachine,ServiceRequest1UpdateState>()
.EntityFrameworkRepository(r =>
{
r.ConcurrencyMode = ConcurrencyMode.pessimistic; // or use Optimistic,ServiceRequest1UpdateStateDbContext>((provider,m =>
{
m.MigrationsAssembly(Assembly.GetExecutingAssembly().GetName().Name);
m.MigrationsHistoryTable($"__{nameof(ServiceRequest1UpdateStateDbContext)}");
});
});
});
x.AddSagaStateMachine<ServiceRequest1ApproveStateMachine,ServiceRequest1ApproveState>()
.EntityFrameworkRepository(r =>
{
r.ConcurrencyMode = ConcurrencyMode.pessimistic; // or use Optimistic,ServiceRequest1ApproveStateDbContext>((provider,m =>
{
m.MigrationsAssembly(Assembly.GetExecutingAssembly().GetName().Name);
m.MigrationsHistoryTable($"__{nameof(ServiceRequest1ApproveStateDbContext)}");
});
});
});
});
services.AddSingleton<IHostedService,MasstransitBusService>();
所有3个状态机的DBContext如下所示
public class ServiceRequest1ApproveStateDbContext : SagaDbContext
{
public ServiceRequest1ApproveStateDbContext(DbContextOptions<ServiceRequest1ApproveStateDbContext> options)
: base(options)
{
}
/// <summary>
/// Gets the configurations.
/// </summary>
protected override IEnumerable<ISagaClassMap> Configurations
{
get { yield return new ServiceRequest1ApproveStateMap(); }
}
}
下面的状态图
public class ServiceRequest1ApproveStateMap : SagaClassMap<ServiceRequest1ApproveState>
{
protected override void Configure(EntityTypeBuilder<ServiceRequest1ApproveState> entity,ModelBuilder model)
{
entity.Property(x => x.CurrentState).HasMaxLength(64);
entity.Property(x => x.Id);
entity.Property(x => x.ServiceId);
entity.Property(x => x.ReadyEventStatus);
}
}
从上面的代码中,只有ServiceRequest1RegisterStateMachine可以完美运行,其余的状态机甚至都不会进入Initially。我可以确认所有迁移都是事先完成的,并且只有1个存储库配置时,这些状态机都可以单独正常运行,即,如果仅ServiceRequest1ApproveStateMachine的repo config,则此状态机可以正常工作。但是,如果所有3个repo配置都存在,则只有第1个有效。 我需要有关使用EFCore正确实现传奇持久性的指导。我是否应该尝试使用masstransit docs(https://masstransit-project.com/usage/sagas/efcore.html)
中提到的使用单个dbcontext实现解决方法
以下是我为确保状态机按预期工作所做的更改。即使我们最初的状态机实现是基于sqlserver efcore持久性的文档,更改也是基于@Chris建议的注释进行的。
services.AddDbContext<ServiceRequest1RegisterStateDbContext>(x =>
x.UseSqlServer(configuration.GetConnectionString("StateDBConnection")));
services.AddDbContext<ServiceRequest1UpdateStateDbContext>(x =>
x.UseSqlServer(configuration.GetConnectionString("StateDBConnection")));
services.AddDbContext<ServiceRequest1ApproveStateDbContext>(x =>
x.UseSqlServer(configuration.GetConnectionString("StateDBConnection")));
services.AddMassTransit(x =>
{
x.AddBus(provider => MassTransit.Bus.Factory.CreateUsingRabbitMq(cfg =>
{
cfg.Host(hostUri,hst =>
{
hst.Username(appSettings.RabbitMQ.Username);
hst.Password(appSettings.RabbitMQ.Password);
});
cfg.ReceiveEndpoint("microservice-response",e =>
{
AddConsumers(e,provider);
e.ConfigureSaga<ServiceRequest1RegisterState>(provider);
e.ConfigureSaga<ServiceRequest1UpdateState>(provider);
e.ConfigureSaga<ServiceRequest1ApproveState>(provider);
});
}));
////x.AddSagaStateMachine<ServiceRequest1RegisterStateMachine,ServiceRequest1RegisterState>()
//// .InMemoryRepository();
////x.AddSagaStateMachine<ServiceRequest1UpdateStateMachine,ServiceRequest1UpdateState>()
//// .InMemoryRepository();
////x.AddSagaStateMachine<ServiceRequest1ApproveStateMachine,ServiceRequest1ApproveState>()
//// .InMemoryRepository();
x.AddSagaStateMachine<ServiceRequest1RegisterStateMachine,ServiceRequest1RegisterState>()
.EntityFrameworkRepository(r =>
{
r.ConcurrencyMode = ConcurrencyMode.Pessimistic; // or use Optimistic,which requires RowVersion
r.ExistingDbContext<ServiceRequest1RegisterStateDbContext>();
});
x.AddSagaStateMachine<ServiceRequest1UpdateStateMachine,ServiceRequest1UpdateState>()
.EntityFrameworkRepository(r =>
{
r.ConcurrencyMode = ConcurrencyMode.Pessimistic; // or use Optimistic,which requires RowVersion
r.ExistingDbContext<ServiceRequest1UpdateStateDbContext>();
});
x.AddSagaStateMachine<ServiceRequest1ApproveStateMachine,ServiceRequest1ApproveState>()
.EntityFrameworkRepository(r =>
{
r.ConcurrencyMode = ConcurrencyMode.Pessimistic; // or use Optimistic,which requires RowVersion
r.ExistingDbContext<ServiceRequest1ApproveStateDbContext>();
});
});
services.AddSingleton<IHostedService,MassTransitBusService>();
}