/// <summary>
/// Save the specified <paramref name="context"/> changes for the given <paramref name="saga"/>.
/// </summary>
/// <param name="saga">The current saga version for which the context applies.</param>
/// <param name="context">The saga context containing the saga changes to be applied.</param>
public Saga Save(Saga saga, SagaContext context)
{
Verify.NotNull(saga, nameof(saga));
Verify.NotNull(context, nameof(context));
var sagaType = saga.GetType();
var key = String.Concat(sagaType.GetFullNameWithAssembly(), "-", saga.CorrelationId);
using (var sagaLock = new SagaLock(sagaType, saga.CorrelationId))
{
sagaLock.Aquire();
try
{
sagaStore.Save(saga, context);
if (saga.Completed)
{
memoryCache.Remove(key);
}
else
{
memoryCache.Set(key, saga, CreateCacheItemPolicy());
}
return(saga);
}
catch (ConcurrencyException)
{
memoryCache.Remove(key);
throw;
}
}
}
/// <summary>
/// When overriden, defines the custom behavior to be invoked after attempting to save the specified <paramref name="saga"/>.
/// </summary>
/// <param name="saga">The modified <see cref="Saga"/> instance if <paramref name="error"/> is <value>null</value>; otherwise the original <see cref="Saga"/> instance if <paramref name="error"/> is not <value>null</value>.</param>
/// <param name="context">The current <see cref="SagaContext"/> assocaited with the pending saga modifications.</param>
/// <param name="error">The <see cref="Exception"/> thrown if the save was unsuccessful; otherwise <value>null</value>.</param>
public override void PostSave(Saga saga, SagaContext context, Exception error)
{
if (!context.TimeoutChanged || saga == null || error != null)
{
return;
}
if (saga.Timeout.HasValue && !saga.Completed)
{
var timeout = saga.Timeout.Value;
TimeoutCache.ScheduleTimeout(new SagaTimeout(saga.GetType(), saga.CorrelationId, timeout));
}
else
{
TimeoutCache.ClearTimeout(new SagaReference(saga.GetType(), saga.CorrelationId));
}
RescheduleTimer(TimeoutCache.GetNextScheduledTimeout());
}
/// <summary>
/// When overriden, defines the custom behavior to be invoked after attempting to save the specified <paramref name="saga"/>.
/// </summary>
/// <param name="saga">The modified <see cref="Saga"/> instance if <paramref name="error"/> is <value>null</value>; otherwise the original <see cref="Saga"/> instance if <paramref name="error"/> is not <value>null</value>.</param>
/// <param name="context">The current <see cref="SagaContext"/> assocaited with the pending saga modifications.</param>
/// <param name="error">The <see cref="Exception"/> thrown if the save was unsuccessful; otherwise <value>null</value>.</param>
public override void PostSave(Saga saga, SagaContext context, Exception error)
{
if (!context.TimeoutChanged || saga == null || error != null)
return;
if (saga.Timeout.HasValue && !saga.Completed)
{
var timeout = saga.Timeout.Value;
TimeoutCache.ScheduleTimeout(new SagaTimeout(saga.GetType(), saga.CorrelationId, timeout));
}
else
{
TimeoutCache.ClearTimeout(new SagaReference(saga.GetType(), saga.CorrelationId));
}
RescheduleTimer(TimeoutCache.GetNextScheduledTimeout());
}
/// <summary>
/// Save the specified <paramref name="context"/> changes for the given <paramref name="saga"/>.
/// </summary>
/// <param name="saga">The current saga version for which the context applies.</param>
/// <param name="context">The saga context containing the saga changes to be applied.</param>
public Saga Save(Saga saga, SagaContext context)
{
Verify.NotNull(saga, nameof(saga));
Verify.NotNull(context, nameof(context));
var sagaType = saga.GetType();
var key = String.Concat(sagaType.GetFullNameWithAssembly(), "-", saga.CorrelationId);
using (var sagaLock = new SagaLock(sagaType, saga.CorrelationId))
{
sagaLock.Aquire();
try
{
sagaStore.Save(saga, context);
if (saga.Completed)
memoryCache.Remove(key);
else
memoryCache.Set(key, saga, CreateCacheItemPolicy());
return saga;
}
catch (ConcurrencyException)
{
memoryCache.Remove(key);
throw;
}
}
}
