ClusterUserCache.cs

using System.Collections.Generic;
using HaaSMiddleware.DomainObjects.ClusterInformation;

namespace HaaSMiddleware.BusinessLogicTier.Logic.ClusterInformation {
	/// <summary>
	///   Provides static cache of last used user ids for each cluster.
	/// </summary>
	public static class ClusterUserCache {
		private static Dictionary<long, long> lastUserId = new Dictionary<long,long>();

		/// <summary>
		///   Returns id of last used user of given cluster.
		///   Returns zero if no user of given cluster has been used yet.
		/// </summary>
		/// <param name="cluster">Cluster</param>
		/// <returns>Last used user id</returns>
		public static long GetLastUserId(Cluster cluster) {
			lock (lastUserId)
			{
				if (lastUserId == null || !lastUserId.ContainsKey(cluster.Id))
				{
					return 0;
				}
				return lastUserId[cluster.Id];
			}
		}

		/// <summary>
		///   Sets last used user id for given cluster.
		/// </summary>
		/// <param name="cluster">Cluster</param>
		/// <param name="clusterUserId">Last used user id</param>
		public static void SetLastUserId(Cluster cluster, long clusterUserId) {
			lock (lastUserId)
			{
				if (cluster.ServiceAccountCredentials.Id == clusterUserId)
				{
					// Do not user service account as regular account
				}
				if (lastUserId == null)
				{
					lastUserId = new Dictionary<long, long>();
				}

				if (!lastUserId.ContainsKey(cluster.Id))
				{
					lastUserId.Add(cluster.Id, clusterUserId);
				}
				else
				{
					lastUserId[cluster.Id] = clusterUserId;
				}
			}
		}
	}
}