/// <summary>
/// Checks if two of events(Transformations) commute locally.
/// </summary>
/// <returns> Boolean saying they commute locally. </returns>
private bool commuteLocally(IEvent leftSideEvent, IEvent rightSideEvent, List<IEvent> previousEvents)
{
ListState currentState = new ListState();
ListState checkState = new ListState();
// Load all current events to the states.
foreach (IEvent @event in previousEvents)
{
currentState.Load(@event);
checkState.Load(@event);
}
// Load one way
currentState.Load(leftSideEvent);
currentState.Load(rightSideEvent);
// Load other way around.
checkState.Load(rightSideEvent);
checkState.Load(leftSideEvent);
// Now check if the two states are the same.
return currentState.Equals(checkState);
}
private List<IEvent> removeRedundantEvents(List<IEvent> events)
{
List<IEvent> returnList = new List<IEvent>();
ListState finalState = new ListState();
//Load the normal final state of all the events.
finalState.LoadList(allPreviousEvents);
finalState.LoadList(events);
foreach (IEvent @event in events)
{
if (@event == null)
break;
returnList.Add(@event);
ListState checkState = new ListState();
checkState.LoadList(allPreviousEvents);
// Load a stat without the current event.
IEnumerable<IEvent> without = events.Where(e => !(e.Equals(@event)));
List<IEvent> withoutList = without.ToList();
checkState.LoadList(without.ToList());
// Check if it is the same as the final state.
if (checkState.Equals(finalState))
{
Debug.WriteLine("Redundant operation found!!!");
returnList.Remove(@event);
}
}
return returnList;
}
/// <summary>
/// Checks if two arrays of events(Transformations) commute locally.
/// </summary>
/// <returns> Boolean saying they commute locally. </returns>
private bool commuteLocally(List<IEvent> leftEvents, List<IEvent> rightEvents, List<IEvent> previousEvents)
{
ListState currentState = new ListState();
ListState firstCheckState = new ListState();
ListState secondCheckState = new ListState();
// Load all current events to the states.
foreach (IEvent @event in previousEvents)
{
currentState.Load(@event);
firstCheckState.Load(@event);
secondCheckState.Load(@event);
}
// Load all left side events on first check.
foreach (IEvent message in leftEvents)
{
//firstCheckState.Load(message.Body);
loadIfPossible(firstCheckState, message);
}
//Load all right side events on first check.
foreach (IEvent @event in rightEvents)
{
loadIfPossible(firstCheckState, @event);
//firstCheckState.Load(@event);
}
// Do it the other way around for the second check.
foreach (IEvent @event in rightEvents)
{
//secondCheckState.Load(@event);
loadIfPossible(secondCheckState, @event);
}
foreach (IEvent message in leftEvents)
{
//secondCheckState.Load(message.Body);
loadIfPossible(secondCheckState, message);
}
// Now check if the two states are the same.
return firstCheckState.Equals(secondCheckState);
}