/// <summary>
/// Find and block any module whose prerequisites for operation are not present. This minimises the damage caused by
/// inconsistent module configuration. Sets up the ModuleSequence property with the operating modules.
/// </summary>
public void ValidateModules()
{
foreach (Module module in Modules.Values)
{
if (module.DependentOn.Any(mn => !Modules.Keys.Any(k => k.StartsWith(mn) && k != module.Name)))
{
module.Blocked = true;
log.ErrorFormat("Module {0} blocked, missing module it depends on", module.Name);
module.Error = "Missing module depended on: " + module.Name;
}
else if (module.IncompatibleWith.Any(mn => Modules.Keys.Any(k => k.StartsWith(mn) && k != module.Name)))
{
module.Blocked = true;
log.ErrorFormat("Module {0} blocked, incompatible module exists", module.Name);
module.Error = "Incompatible module exists: " + module.Name;
}
}
var moduleDict = Modules.Values.Where(m => !m.Blocked).ToDictionary(m => m.Name, m => m);
var sortedModules = new ConstraintOrderedCollection <Module>(m => m.Name);
moduleDict.Values
.Do(m => sortedModules.Add(m, new OrderConstraint(m.Name, m.MustFollow, m.MustPrecede)));
this.Modules = moduleDict;
this.ModuleSequence = sortedModules;
}
/// <summary>
/// Copy a ConstraintOrderedCollection with all its constraints
/// </summary>
/// <returns>The copied ConstraintOrderedCollection</returns>
public ConstraintOrderedCollection <T> Copy()
{
var coc = new ConstraintOrderedCollection <T>(this.nameSelector);
coc.innerList.AddRange(this.innerList);
coc.orderConstraint.AddAnd(this.orderConstraint);
return(coc);
}
/// <summary>
/// Register a function to process event data on raising of an event elsewhere ensuring specified processes on which it
/// is dependent are performed first
/// </summary>
/// <param name="eventName">The name of the event being raised</param>
/// <param name="processor">A delegate which takes the current event data and the sender and returns the processed event data</param>
/// <param name="moduleId">The name of the module. This can be moduletype.module</param>
/// <param name="constraint">An order constraint specifying restrictions on the relative position of this processor in any chain of processors</param>
public void RegisterEventProcessor(
string eventName,
Func <EventHubData, object> processor,
string moduleId,
OrderConstraint constraint)
{
var newProcessor = new ProcessorInfo
{
EventName = eventName,
ModuleId = moduleId,
Processor = processor
};
// register processor on all processor queues where event is or covers a subset of this event
var subEvents = Processors.Keys.Where(k => k.StartsWith(eventName)).ToList();
bool matched = false;
foreach (string subEvent in subEvents)
{
if (Processors[subEvent].Any(p => p.ModuleId == newProcessor.ModuleId))
{
throw new Exception("Trying to add more than 1 processor for module " + newProcessor.ModuleId + " to event queue " + subEvent);
}
Processors[subEvent].Add(newProcessor, constraint);
matched = (subEvent == eventName);
}
// if not regstered anywhere, create a new processor queue containing the processes from the least super event of this one
if (!matched)
{
var leastSuperEvent = LeastSuperEvent(eventName);
var pList = new ConstraintOrderedCollection <ProcessorInfo>(pi => pi.ModuleId);
if (leastSuperEvent != null)
{
pList = Processors[leastSuperEvent].Copy();
}
pList.Add(newProcessor, constraint);
Processors.Add(eventName, pList);
}
}
