public void IndexedLinkedList_AddFirst()
{
IndexedLinkedList<string> list = new IndexedLinkedList<string>();
list.AddFirst("3");
list.AddFirst("2");
list.AddFirst("1");
Assert.AreEqual(3, list.Count);
Assert.AreEqual("1", list.First);
}
public void IndexedLinkedList_Clear()
{
IndexedLinkedList<string> list = new IndexedLinkedList<string>();
list.AddFirst("3");
list.AddFirst("2");
list.AddFirst("1");
Assert.AreEqual(3, list.Count);
list.Clear();
Assert.AreEqual(0, list.Count);
Assert.IsNull(list.First);
Assert.IsNull(list.Last);
}
/// <summary>
/// Creates or updates entity.
/// </summary>
/// <remarks>
/// Update or Create operations are performed in the critical section, so left any processing out-of those functions.
/// </remarks>
/// <param name="entityKey">The entity key.</param>
/// <param name="updateAction">The update action. It will be called when entity with the specified key exists.</param>
/// <param name="createFunc">The create function. It will be called when entity with the specified key not exists.</param>
public void CreateOrUpdateEntity(TKey entityKey, Action <TEntity> updateAction, Func <TEntity> createFunc)
{
VxArgs.NotNull(entityKey, nameof(entityKey));
VxArgs.NotNull(updateAction, nameof(updateAction));
VxArgs.NotNull(createFunc, nameof(createFunc));
lock (_entities)
{
if (_entities.TryGetValue(entityKey, out var entity))
{
updateAction(entity);
}
else
{
TEntity newEntity = createFunc();
// Following max capacity rule.
if (MaxCapacity != null && _gcFifoQueue != null)
{
if (_gcFifoQueue.Count >= MaxCapacity)
{
if (_gcFifoQueue.TryDequeue(out var itemToRemove))
{
_entities.Remove(itemToRemove.Key);
}
}
_gcFifoQueue.AddFirst(entityKey, default);
}
_entities.Add(entityKey, newEntity);
Critical.Assert(
newEntity.Key.Equals(entityKey),
"Created entity should have the same key as was queried to the CreateOrUpdateEntity method.");
}
}
}
