public static IReaderStrategy Create(int phase, IQuerySources sources, ITimeProvider timeProvider, bool stopOnEof, IPrincipal runAs)
{
if (!sources.AllStreams && !sources.HasCategories() && !sources.HasStreams()
&& string.IsNullOrEmpty(sources.CatalogStream))
throw new InvalidOperationException("None of streams and categories are included");
if (!sources.AllEvents && !sources.HasEvents())
throw new InvalidOperationException("None of events are included");
if (sources.HasStreams() && sources.HasCategories())
throw new InvalidOperationException(
"Streams and categories cannot be included in a filter at the same time");
if (sources.AllStreams && (sources.HasCategories() || sources.HasStreams()))
throw new InvalidOperationException("Both FromAll and specific categories/streams cannot be set");
if (sources.AllEvents && sources.HasEvents())
throw new InvalidOperationException("Both AllEvents and specific event filters cannot be set");
if (sources.ByStreams && sources.HasStreams())
throw new InvalidOperationException("foreachStream projections are not supported on stream based sources");
if ((sources.HasStreams() || sources.AllStreams) && !string.IsNullOrEmpty(sources.CatalogStream))
throw new InvalidOperationException("catalogStream cannot be used with streams or allStreams");
if (!string.IsNullOrEmpty(sources.CatalogStream) && !sources.ByStreams)
throw new InvalidOperationException("catalogStream is only supported in the byStream mode");
if (!string.IsNullOrEmpty(sources.CatalogStream) && !stopOnEof)
throw new InvalidOperationException("catalogStream is not supported in the projections mode");
if (sources.ReorderEventsOption)
{
if (!string.IsNullOrEmpty(sources.CatalogStream))
throw new InvalidOperationException("Event reordering cannot be used with stream catalogs");
if (sources.AllStreams)
throw new InvalidOperationException("Event reordering cannot be used with fromAll()");
if (!(sources.HasStreams() && sources.Streams.Length > 1))
{
throw new InvalidOperationException(
"Event reordering is only available in fromStreams([]) projections");
}
if (sources.ProcessingLagOption < 50)
throw new InvalidOperationException("Event reordering requires processing lag at least of 50ms");
}
if (sources.HandlesDeletedNotifications && !sources.ByStreams)
throw new InvalidOperationException(
"Deleted stream notifications are only supported with foreachStream()");
var readerStrategy = new ReaderStrategy(
phase, sources.AllStreams, sources.Categories, sources.Streams, sources.AllEvents,
sources.IncludeLinksOption, sources.Events, sources.HandlesDeletedNotifications, sources.CatalogStream,
sources.ProcessingLagOption, sources.ReorderEventsOption, runAs, timeProvider);
return readerStrategy;
}
public ParallelQueryProcessingStrategy(
string name,
ProjectionVersion projectionVersion,
IProjectionStateHandler stateHandler,
ProjectionConfig projectionConfig,
IQuerySources sourceDefinition,
string handlerType,
string query,
ProjectionNamesBuilder namesBuilder,
ILogger logger,
SpooledStreamReadingDispatcher spoolProcessingResponseDispatcher,
ReaderSubscriptionDispatcher subscriptionDispatcher)
: base(name, projectionVersion, projectionConfig, sourceDefinition, logger, subscriptionDispatcher)
{
if (string.IsNullOrEmpty(handlerType))
{
throw new ArgumentNullException("handlerType");
}
if (string.IsNullOrEmpty(query))
{
throw new ArgumentNullException("query");
}
_stateHandler = stateHandler;
_projectionConfig = projectionConfig;
_sourceDefinition = sourceDefinition;
_handlerType = handlerType;
_query = query;
_namesBuilder = namesBuilder;
_spoolProcessingResponseDispatcher = spoolProcessingResponseDispatcher;
if (_sourceDefinition.CatalogStream == SystemStreams.AllStream)
{
_catalogStreamName = SystemStreams.AllStream;
}
else if (_sourceDefinition.HasCategories())
{
_catalogStreamName = _namesBuilder.GetCategoryCatalogStreamName(_sourceDefinition.Categories[0]);
}
else
{
_catalogStreamName = _sourceDefinition.CatalogStream;
}
}
public ParallelQueryProcessingStrategy(
string name,
ProjectionVersion projectionVersion,
IProjectionStateHandler stateHandler,
ProjectionConfig projectionConfig,
IQuerySources sourceDefinition,
string handlerType,
string query,
ProjectionNamesBuilder namesBuilder,
ILogger logger,
SpooledStreamReadingDispatcher spoolProcessingResponseDispatcher,
ReaderSubscriptionDispatcher subscriptionDispatcher)
: base(name, projectionVersion, projectionConfig, sourceDefinition, logger, subscriptionDispatcher)
{
if (string.IsNullOrEmpty(handlerType)) throw new ArgumentNullException("handlerType");
if (string.IsNullOrEmpty(query)) throw new ArgumentNullException("query");
_stateHandler = stateHandler;
_projectionConfig = projectionConfig;
_sourceDefinition = sourceDefinition;
_handlerType = handlerType;
_query = query;
_namesBuilder = namesBuilder;
_spoolProcessingResponseDispatcher = spoolProcessingResponseDispatcher;
if (_sourceDefinition.CatalogStream == SystemStreams.AllStream)
{
_catalogStreamName = SystemStreams.AllStream;
}
else if (_sourceDefinition.HasCategories())
{
_catalogStreamName = _namesBuilder.GetCategoryCatalogStreamName(_sourceDefinition.Categories[0]);
}
else
{
_catalogStreamName = _sourceDefinition.CatalogStream;
}
}
public ProjectionProcessingStrategy CreateProjectionProcessingStrategy(
string name,
ProjectionVersion projectionVersion,
ProjectionNamesBuilder namesBuilder,
IQuerySources sourceDefinition,
ProjectionConfig projectionConfig,
IProjectionStateHandler stateHandler, string handlerType, string query)
{
if (!sourceDefinition.DisableParallelismOption && projectionConfig.StopOnEof && sourceDefinition.ByStreams &&
sourceDefinition.DefinesFold && !string.IsNullOrEmpty(sourceDefinition.CatalogStream))
{
return(new ParallelQueryProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
handlerType,
query,
namesBuilder,
_logger,
_spoolProcessingResponseDispatcher,
_subscriptionDispatcher));
}
if (!sourceDefinition.DisableParallelismOption && projectionConfig.StopOnEof && sourceDefinition.ByStreams &&
sourceDefinition.DefinesFold && sourceDefinition.HasCategories())
{
return(new ParallelQueryProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
handlerType,
query,
namesBuilder,
_logger,
_spoolProcessingResponseDispatcher,
_subscriptionDispatcher));
}
return(projectionConfig.StopOnEof
? (ProjectionProcessingStrategy)
new QueryProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
_logger,
_subscriptionDispatcher)
: new ContinuousProjectionProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
_logger,
_subscriptionDispatcher));
}
public static IReaderStrategy Create(
string tag,
int phase,
IQuerySources sources,
ITimeProvider timeProvider,
bool stopOnEof,
IPrincipal runAs)
{
if (!sources.AllStreams && !sources.HasCategories() && !sources.HasStreams() &&
string.IsNullOrEmpty(sources.CatalogStream))
{
throw new InvalidOperationException("None of streams and categories are included");
}
if (!sources.AllEvents && !sources.HasEvents())
{
throw new InvalidOperationException("None of events are included");
}
if (sources.HasStreams() && sources.HasCategories())
{
throw new InvalidOperationException(
"Streams and categories cannot be included in a filter at the same time");
}
if (sources.AllStreams && (sources.HasCategories() || sources.HasStreams()))
{
throw new InvalidOperationException("Both FromAll and specific categories/streams cannot be set");
}
if (sources.AllEvents && sources.HasEvents())
{
throw new InvalidOperationException("Both AllEvents and specific event filters cannot be set");
}
if (sources.ByStreams && sources.HasStreams())
{
throw new InvalidOperationException(
"foreachStream projections are not supported on stream based sources");
}
if ((sources.HasStreams() || sources.AllStreams) && !string.IsNullOrEmpty(sources.CatalogStream))
{
throw new InvalidOperationException("catalogStream cannot be used with streams or allStreams");
}
if (!string.IsNullOrEmpty(sources.CatalogStream) && !sources.ByStreams)
{
throw new InvalidOperationException("catalogStream is only supported in the byStream mode");
}
if (!string.IsNullOrEmpty(sources.CatalogStream) && !stopOnEof)
{
throw new InvalidOperationException("catalogStream is not supported in the projections mode");
}
if (sources.ReorderEventsOption)
{
if (!string.IsNullOrEmpty(sources.CatalogStream))
{
throw new InvalidOperationException("Event reordering cannot be used with stream catalogs");
}
if (sources.AllStreams)
{
throw new InvalidOperationException("Event reordering cannot be used with fromAll()");
}
if (!(sources.HasStreams() && sources.Streams.Length > 1))
{
throw new InvalidOperationException(
"Event reordering is only available in fromStreams([]) projections");
}
if (sources.ProcessingLagOption < 50)
{
throw new InvalidOperationException("Event reordering requires processing lag at least of 50ms");
}
}
if (sources.HandlesDeletedNotifications && !sources.ByStreams)
{
throw new InvalidOperationException(
"Deleted stream notifications are only supported with foreachStream()");
}
var readerStrategy = new ReaderStrategy(
tag,
phase,
sources.AllStreams,
sources.Categories,
sources.Streams,
sources.AllEvents,
sources.IncludeLinksOption,
sources.Events,
sources.HandlesDeletedNotifications,
sources.CatalogStream,
sources.ProcessingLagOption,
sources.ReorderEventsOption,
runAs,
timeProvider);
return(readerStrategy);
}
public ProjectionProcessingStrategy CreateProjectionProcessingStrategy(
string name,
ProjectionVersion projectionVersion,
ProjectionNamesBuilder namesBuilder,
IQuerySources sourceDefinition,
ProjectionConfig projectionConfig,
IProjectionStateHandler stateHandler, string handlerType, string query)
{
if (!sourceDefinition.DisableParallelismOption && projectionConfig.StopOnEof && sourceDefinition.ByStreams
&& sourceDefinition.DefinesFold && !string.IsNullOrEmpty(sourceDefinition.CatalogStream))
{
return new ParallelQueryProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
handlerType,
query,
namesBuilder,
_logger,
_spoolProcessingResponseDispatcher,
_subscriptionDispatcher);
}
if (!sourceDefinition.DisableParallelismOption && projectionConfig.StopOnEof && sourceDefinition.ByStreams
&& sourceDefinition.DefinesFold && sourceDefinition.HasCategories())
{
return new ParallelQueryProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
handlerType,
query,
namesBuilder,
_logger,
_spoolProcessingResponseDispatcher,
_subscriptionDispatcher);
}
return projectionConfig.StopOnEof
? (ProjectionProcessingStrategy)
new QueryProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
_logger,
_subscriptionDispatcher)
: new ContinuousProjectionProcessingStrategy(
name,
projectionVersion,
stateHandler,
projectionConfig,
sourceDefinition,
_logger,
_subscriptionDispatcher);
}
