Testing sequential generation of ids when storing documents with master master setup in parallel execution

mastermasteridentitytest.cs

void Main()
{
	var orders = false;
	
	if(orders)
		ParallelExecute(db => {
			using(var session = db.OpenSession())
			{
				var list = new [] {new Order(), new Order()};				
				foreach (var order in list)
					session.Store(order);
					
				session.SaveChanges();			
				list.Dump();				
			}
		}, 4);
		
	ParallelExecute(db => {
		string order;
		using(var session = db.OpenSession())
			order = session.Advanced.LoadStartingWith<Order>("orders/", pageSize:1).First ().Id;
		
		using(var session = db.OpenSession())
		{				
			var list = new List<OrderItem>();
			list.AddRange(new [] {
				new OrderItem {Id = "orderitems/" + order + "/"}, 
				new OrderItem {Id = "orderitems/" + order + "/"},
				new OrderItem {Id = "orderitems/" + order + "/"}					
			});
			foreach (var item in list)
				session.Store(item);
				
			session.SaveChanges();
			
			list.Dump();
		}
	}, 4000);	
}

private void ParallelExecute(Action<IDocumentStore> action, int loop)
{
	Action<int> dowork = times => 
	{
		var stores = new List<Action>();	
		using(var documentStore = new DocumentStore
		{
			Url = "http://localhost:8081/databases/db-b",		
		}.Initialize())	
		{				
			documentStore.Conventions.FailoverBehavior = FailoverBehavior.AllowReadsFromSecondariesAndWritesToSecondaries;
			
			using(var session = documentStore.OpenSession())
			{
				if(!session.Advanced.LoadStartingWith<Order>("orders/", pageSize:1).Any ())
				{
					session.Store(new Order());
					session.SaveChanges();
				}
			}
				
			for (int i = 0; i < times; i++)
				stores.Add(() => action(documentStore));				
					
			System.Threading.Tasks.Parallel.Invoke(stores.ToArray());							
		}			
	};
	
	var actions = new List<Action>();
	for (int i = 0; i < 10; i++)
		actions.Add(() => dowork(loop/10));
		
	System.Threading.Tasks.Parallel.Invoke(actions.ToArray());	
}