ElementInstanceManager.cs

namespace QAction_1
{
	using System;
	using System.Collections.Concurrent;

	using Skyline.DataMiner.Scripting;

	public class ElementInstanceManager
	{
		private static readonly ConcurrentDictionary<string, ElementInstance> Instances = new ConcurrentDictionary<string, ElementInstance>();

		public static ElementInstance GetInstance(SLProtocol protocol)
		{
			string key = GetKey(protocol);

			return Instances.GetOrAdd(key, k => new ElementInstance(k));
		}

		public static ElementInstance CreateNewInstance(SLProtocol protocol)
		{
			string key = GetKey(protocol);

			var instance = new ElementInstance(key);
			Instances[key] = instance;

			return instance;
		}

		public static void RemoveInstance(SLProtocol protocol)
		{
			string key = GetKey(protocol);

			Instances.TryRemove(key, out _);
		}

		private static string GetKey(SLProtocol protocol)
		{
			if (protocol == null)
				throw new ArgumentNullException(nameof(protocol));

			return String.Join("/", protocol.DataMinerID, protocol.ElementID);
		}
	}
}