各种权重策略

分别为 平均算法 、权重、轮询

　　　　　/// <summary>
        /// 平均
        /// </summary>
        /// <returns></returns>
        protected override int GetIndex()
        {
　　　　　　　　//直接使用random会因为种子的问题使查询很有可能一致，所以增加 iTotalCount  控制种子

return new Random(iTotalCount++).Next(0, base._CurrentAgentServiceDictionary.Length); }

 

 

　　　权重

　　　　

   #region Identity
        private static int _iTotalCount = 0;
        private static int iTotalCount
        {
            get
            {
                return _iTotalCount;
            }
            set
            {
                _iTotalCount = value >= Int32.MaxValue ? 0 : value;
            }
        }
        public WeightDispatcher(IOptionsMonitor<ConsulClientOptions> consulClientOption) : base(consulClientOption)
        {

        }
        #endregion

        protected override string ChooseAddress(string serviceName)
        {
            ConsulClient client = new ConsulClient(c =>
            {
                c.Address = new Uri($"http://{base._ConsulClientOption.IP}:{base._ConsulClientOption.Port}/");
                c.Datacenter = base._ConsulClientOption.Datacenter;
            });
            AgentService agentService = null;
            var response = client.Agent.Services().Result.Response;

            this._CurrentAgentServiceDictionary = response.Where(s => s.Value.Service.Equals(serviceName, StringComparison.OrdinalIgnoreCase)).ToArray();


            var serviceDictionaryNew = new List<AgentService>();
            foreach (var service in base._CurrentAgentServiceDictionary)
            {
                serviceDictionaryNew.AddRange(Enumerable.Repeat(service.Value, int.TryParse(service.Value.Tags?[0], out int iWeight) ? 1 : iWeight));
            }
            int index = new Random(DateTime.Now.Millisecond).Next(0, int.MaxValue) % serviceDictionaryNew.Count;
            agentService = serviceDictionaryNew[index];

            return $"{agentService.Address}:{agentService.Port}";
        }

　　

 

 

 

　　轮询、//使用初始变量为0 每次取余

   #region Identity
        private static int _iTotalCount = 0;
        private static int iTotalCount
        {
            get
            {
                return _iTotalCount;
            }
            set
            {
                _iTotalCount = value >= Int32.MaxValue ? 0 : value;
            }
        }

        public PollingDispatcher(IOptionsMonitor<ConsulClientOptions> consulClientOption) : base(consulClientOption)
        {
        }
        #endregion

        /// <summary>
        /// 轮询
        /// </summary>
        /// <param name="serviceCount"></param>
        /// <returns></returns>
        protected override int GetIndex()
        {
            return iTotalCount++ % base._CurrentAgentServiceDictionary.Length;
        }