如何避免每个客户端请求建立连接？

Question

我正在与SCOM一起实施WCF休息服务。从服务我在客户端请求警报数据时建立与SCOM服务器的连接。 由于连接不可用，因此每隔2分钟发生警报请求就不希望建立连接，如果连接不可用则保持连接状态永不过期，则建立连接。这是示例代码。

public void SCOM_ConnectionSettings()
        {
            System.Security.SecureString ss = new System.Security.SecureString();

            ss.AppendChar('x');
            ss.AppendChar('x');
            ss.AppendChar('x');
            ss.AppendChar('d');
            ss.AppendChar('x');
            ss.AppendChar('x');


            ManagementGroupConnectionSettings mgGroupConnection = new ManagementGroupConnectionSettings("xxx.xxx.xxx.xx");
            mgGroupConnection.CacheMode = CacheMode.None;
            mgGroupConnection.Domain = "IMTS.Test";
            mgGroupConnection.UserName = "Azureuser";

            mgGroupConnection.Password = ss;
            mgGroup = new ManagementGroup(mgGroupConnection);


        }

调用警报的主要方法

  public List<MonitoringObject> GetNewAssetInformation()
        {
            SCOM_ConnectionSettings();
            List<MonitoringObject> monitoringobjects = new List<MonitoringObject>();

            AgentManagedComputerCriteria agentCriteria = new AgentManagedComputerCriteria("LastModified >= '" + new DateTime(2015, 5, 25).ToString("G") + "'");//LastModified >= '" + new DateTime(2006, 10, 25).ToString("G") + "'");

            ManagementGroupAdministration administration = mgGroup.GetAdministration();
            ReadOnlyCollection<AgentManagedComputer> agents = administration.GetAgentManagedComputers(agentCriteria);
            if (agents.Count > 0)
            {
                foreach (AgentManagedComputer agentManagedComputer in agents)
                {
                    if (agentManagedComputer.InstallTime >= DateTime.Now.AddMonths(-1))
                    {
                        monitoringobjects.Add(mgGroup.GetMonitoringObject(agentManagedComputer.Id));
                    }

                }
                return monitoringobjects;
            }
            return null;
        }

感谢