/// <summary>
/// Verify that a relationship is under the necessary fanout limit.
/// </summary>
/// <param name="relReq"></param>
/// <param name="entityId"></param>
/// <param name="relCount"></param>
internal static void CheckFanoutLimit(RelationshipRequest relReq, long entityId, int relCount)
{
string prefix = null;
bool isError = false;
int threshold = MaxRelatedEntitiesWarning;
// Warning or error?
if (relCount > MaxRelatedEntitiesWarning && !EntityDataBuilder <IEntity> .BypassMaxRelatedEntities(relReq, entityId))
{
prefix = "Large number";
if (relCount > MaxRelatedEntities)
{
isError = true;
prefix = "Exceeded maximum number";
threshold = MaxRelatedEntities;
}
}
// All OK
if (prefix == null)
{
return;
}
// Format message
string message = string.Format(
"{0} ({1} > {2}) of related entities for EntityInfoService. Relationship: {3} {4}. {5} entity: {6} {7}\n{8}",
prefix,
relCount,
threshold,
relReq.RelationshipTypeId,
Entity.GetNameForLogEntry(relReq.RelationshipTypeId.Id),
relReq.IsReverse ? "To" : "From",
entityId,
Entity.GetNameForLogEntry(entityId),
Environment.StackTrace
);
if (isError)
{
EventLog.Application.WriteError(message);
}
else
{
EventLog.Application.WriteWarning(message);
}
}
/// <summary>
/// Return true if we should special-case bypass the max fanout limit.
/// </summary>
/// <remarks>
/// Ordinarily we really want to lock down the fanout. But there's already too much code that
/// relies on following 'derivedTypes' from resource, which is too many. TODO: Fix this one day.
/// </remarks>
/// <returns>True to bypass, otherwise false.</returns>
internal static bool BypassMaxRelatedEntities(RelationshipRequest request, long originEntityId)
{
// only bypass core:derivedTypes in the forward direction. (noting that the alias itself is reverse .. but we are following the reverse alias forwards)
if (request.RelationshipTypeId.Alias != "derivedTypes" || request.RelationshipTypeId.Namespace != "core" || request.IsReverse)
{
return(false);
}
// only bypass if we're coming from core:resource
IEntity entity = Entity.Get(originEntityId);
if (entity == null)
{
return(false);
}
bool result = entity.Alias == "resource" && entity.Namespace == "core";
return(result);
}
