public EventProcessingObserver(IDatabaseContextFactory databaseContextFactory,
IProjectionConfiguration projectionConfiguration)
{
Guard.AgainstNull(databaseContextFactory, nameof(databaseContextFactory));
Guard.AgainstNull(projectionConfiguration, nameof(projectionConfiguration));
_databaseContextFactory = databaseContextFactory;
_projectionConfiguration = projectionConfiguration;
}
public UserProjectionHandler(IProjectionConfiguration configuration, IDatabaseContextFactory databaseContextFactory,
ISystemUserQuery query)
{
Guard.AgainstNull(configuration, "configuration");
Guard.AgainstNull(databaseContextFactory, "databaseContextFactory");
Guard.AgainstNull(query, "query");
_configuration = configuration;
_databaseContextFactory = databaseContextFactory;
_query = query;
}
public ProjectionPosition(IDatabaseContextFactory databaseContextFactory, IDatabaseGateway databaseGateway,
IProjectionPositionQueryFactory queryFactory, IProjectionConfiguration projectionConfiguration)
{
Guard.AgainstNull(projectionConfiguration, "projectionConfiguration");
Guard.AgainstNull(databaseContextFactory, "databaseContextFactory");
Guard.AgainstNull(databaseGateway, "databaseGateway");
Guard.AgainstNull(queryFactory, "queryFactory");
_projectionConfiguration = projectionConfiguration;
_databaseContextFactory = databaseContextFactory;
_databaseGateway = databaseGateway;
_queryFactory = queryFactory;
}
public ProjectionEventReader(ISerializer serializer, IDatabaseContextFactory databaseContextFactory, IDatabaseGateway databaseGateway,
IEventStoreQueryFactory queryFactory, IProjectionConfiguration projectionConfiguration)
{
Guard.AgainstNull(serializer, "serializer");
Guard.AgainstNull(databaseContextFactory, "databaseContextFactory");
Guard.AgainstNull(databaseGateway, "databaseGateway");
Guard.AgainstNull(queryFactory, "queryFactory");
Guard.AgainstNull(projectionConfiguration, "projectionConfiguration");
_serializer = serializer;
_databaseContextFactory = databaseContextFactory;
_databaseGateway = databaseGateway;
_queryFactory = queryFactory;
_projectionConfiguration = projectionConfiguration;
}
internal static ITraitResolver GetTraitResolver(IProjectionConfiguration configuration)
{
return configuration.TraitResolver ?? new StandardTraitResolver();
}
internal static ProjectionOptions GetOptions(IProjectionConfiguration configuration)
{
var options = configuration.Options;
switch (options & ProjectionOptionsInternal.AssemblyModes)
{
case ProjectionOptions.None:
case ProjectionOptions.SaveAssemblies:
case ProjectionOptions.CollectAssemblies:
return options;
default:
throw Error.SaveAndCollectAssembliesNotSupported();
}
}
internal static int GetMaxTypesPerAssembly(IProjectionConfiguration configuration)
{
return configuration.MaxTypesPerAssembly ??
(
// In some versions of .NET, performance of TypeBuilder.CreateType degrades at O(n^2) as more
// types are added to the dynamic assembly. Workaround is to create one assembly per N types,
// where N is a low-enough number.
//
// See: http://support.microsoft.com/kb/970924
//
Environment.Version.Major < 4 ? 4 : 64
);
}
internal static ProjectionAssemblyFactory GetAssemblyFactory(IProjectionConfiguration configuration)
{
var options = GetOptions(configuration);
var threshold = configuration.MaxTypesPerAssembly;
return threshold <= 0 ? ProjectionAssemblyFactory.Single (options)
: threshold == 1 ? ProjectionAssemblyFactory.PerType(options)
: ProjectionAssemblyFactory.Batched(threshold.Value, options);
}