/// <summary>
/// Save the specified <paramref name="context"/> changes for the given aggregate.
/// </summary>
/// <param name="aggregate">The current aggregate version for which the context applies.</param>
/// <param name="context">The command context containing the aggregate changes to be applied.</param>
public SaveResult Save(Aggregate aggregate, CommandContext context)
{
Verify.NotNull(aggregate, nameof(aggregate));
Verify.NotNull(context, nameof(context));
var copy = aggregate.Copy();
var aggregateType = aggregate.GetType();
var key = String.Concat(aggregateType.GetFullNameWithAssembly(), "-", aggregate.Id);
using (var aggregateLock = new AggregateLock(aggregateType, aggregate.Id))
{
aggregateLock.Aquire();
try
{
var result = aggregateStore.Save(copy, context);
memoryCache.Set(key, copy, CreateCacheItemPolicy());
return(result);
}
catch (ConcurrencyException)
{
memoryCache.Remove(key);
throw;
}
}
}
/// <summary>
/// Gets the set of known apply methods for the given <paramref name="aggregate"/> instance.
/// </summary>
/// <param name="aggregate">The <see cref="Aggregate"/> instance on which the event is to be applied.</param>
private ApplyMethodCollection GetKnownApplyMethods(Aggregate aggregate)
{
Type aggregateType = aggregate.GetType();
ApplyMethodCollection applyMethods;
if (!knownApplyMethods.TryGetValue(aggregateType, out applyMethods))
{
throw new MappingException(Exceptions.AggregateTypeUndiscovered.FormatWith(aggregate.GetType()));
}
return(applyMethods);
}
/// <summary>
/// Creates a commit for the specified <paramref name="aggregate"/> based on the provided <paramref name="context"/>.
/// </summary>
/// <param name="aggregate">The <see cref="Aggregate"/> instance for which the commit is to be applied.</param>
/// <param name="context">The <see cref="CommandContext"/> instance containing the pending modifications to the associated <paramref name="aggregate"/>.</param>
private static Commit CreateCommit(Aggregate aggregate, CommandContext context)
{
EventCollection events = context.GetRaisedEvents();
HeaderCollection headers;
if (aggregate.Version == 0)
{
var typeHeader = new Header(Header.Aggregate, aggregate.GetType().GetFullNameWithAssembly(), checkReservedNames: false);
headers = new HeaderCollection(context.Headers.Concat(typeHeader));
}
else
{
headers = context.Headers;
}
return(new Commit(context.CommandId, aggregate.Id, aggregate.Version + 1, headers, events));
}
/// <summary>
/// Save the specified <paramref name="context"/> changes for the given aggregate.
/// </summary>
/// <param name="aggregate">The current aggregate version for which the context applies.</param>
/// <param name="context">The command context containing the aggregate changes to be applied.</param>
public SaveResult Save(Aggregate aggregate, CommandContext context)
{
Verify.NotNull(aggregate, nameof(aggregate));
Verify.NotNull(context, nameof(context));
var copy = aggregate.Copy();
var aggregateType = aggregate.GetType();
var key = String.Concat(aggregateType.GetFullNameWithAssembly(), "-", aggregate.Id);
using (var aggregateLock = new AggregateLock(aggregateType, aggregate.Id))
{
aggregateLock.Aquire();
try
{
var result = aggregateStore.Save(copy, context);
memoryCache.Set(key, copy, CreateCacheItemPolicy());
return result;
}
catch (ConcurrencyException)
{
memoryCache.Remove(key);
throw;
}
}
}
/// <summary>
/// Get the associated apply method for the specified <see cref="Event"/> <paramref name="e"/> from the known <paramref name="applyMethods"/>.
/// </summary>
/// <param name="aggregate">The <see cref="Aggregate"/> instance on which the event is to be applied.</param>
/// <param name="e">The <see cref="Event"/> to be applied.</param>
/// <param name="applyMethods">The set of known apply methods for a given aggregate instance</param>
private static Action <Aggregate, Event> GetApplyMethod(Aggregate aggregate, Event e, ApplyMethodCollection applyMethods)
{
Action <Aggregate, Event> applyMethod;
Type eventType = e.GetType();
if (applyMethods.TryGetValue(eventType, out applyMethod))
{
return(applyMethod);
}
if (!applyMethods.ApplyOptional)
{
throw new MappingException(Exceptions.AggregateApplyMethodNotFound.FormatWith(aggregate.GetType(), e.GetType()));
}
return(VoidApplyMethod);
}
/// <summary>
/// Gets the set of known apply methods for the given <paramref name="aggregate"/> instance.
/// </summary>
/// <param name="aggregate">The <see cref="Aggregate"/> instance on which the event is to be applied.</param>
private ApplyMethodCollection GetKnownApplyMethods(Aggregate aggregate)
{
Type aggregateType = aggregate.GetType();
ApplyMethodCollection applyMethods;
if (!knownApplyMethods.TryGetValue(aggregateType, out applyMethods))
throw new MappingException(Exceptions.AggregateTypeUndiscovered.FormatWith(aggregate.GetType()));
return applyMethods;
}
/// <summary>
/// Get the associated apply method for the specified <see cref="Event"/> <paramref name="e"/> from the known <paramref name="applyMethods"/>.
/// </summary>
/// <param name="aggregate">The <see cref="Aggregate"/> instance on which the event is to be applied.</param>
/// <param name="e">The <see cref="Event"/> to be applied.</param>
/// <param name="applyMethods">The set of known apply methods for a given aggregate instance</param>
private static Action<Aggregate, Event> GetApplyMethod(Aggregate aggregate, Event e, ApplyMethodCollection applyMethods)
{
Action<Aggregate, Event> applyMethod;
Type eventType = e.GetType();
if (applyMethods.TryGetValue(eventType, out applyMethod))
return applyMethod;
if (!applyMethods.ApplyOptional)
throw new MappingException(Exceptions.AggregateApplyMethodNotFound.FormatWith(aggregate.GetType(), e.GetType()));
return VoidApplyMethod;
}
/// <summary>
/// Creates a commit for the specified <paramref name="aggregate"/> based on the provided <paramref name="context"/>.
/// </summary>
/// <param name="aggregate">The <see cref="Aggregate"/> instance for which the commit is to be applied.</param>
/// <param name="context">The <see cref="CommandContext"/> instance containing the pending modifications to the associated <paramref name="aggregate"/>.</param>
private static Commit CreateCommit(Aggregate aggregate, CommandContext context)
{
EventCollection events = context.GetRaisedEvents();
HeaderCollection headers;
if (aggregate.Version == 0)
{
var typeHeader = new Header(Header.Aggregate, aggregate.GetType().GetFullNameWithAssembly(), checkReservedNames: false);
headers = new HeaderCollection(context.Headers.Concat(typeHeader));
}
else
{
headers = context.Headers;
}
return new Commit(context.CommandId, aggregate.Id, aggregate.Version + 1, headers, events);
}