/// <summary>
/// 刷新对应模块的Url
/// </summary>
/// <param name="app"></param>
/// <returns></returns>
public static bool RefreshEurekaUrls(String app)
{
try
{
List <EurekaUrlAction> urlsOfApp = new List <EurekaUrlAction>();
foreach (String serverUrl in _EurekaServers) //遍历EUREKA服务的APP内容
{
String eurekaServerInfo = HttpDataHelper.GetString(serverUrl);
XmlDocument d = new XmlDocument();
d.LoadXml(eurekaServerInfo);
XmlNode top = d.SelectNodes("//applications")[0];
XmlNodeList applications = top.SelectNodes("//application");
foreach (XmlElement element in applications)
{
string name = element.GetElementsByTagName("name")[0].InnerText;
if (name.Equals(app)) //找到对应的application
{
XmlNodeList instances = element.GetElementsByTagName("instance");
foreach (XmlElement ele in instances)
{
string ipAddress = ele.GetElementsByTagName("ipAddr")[0].InnerText;
string port = ele.GetElementsByTagName("port")[0].InnerText;
string newUrl = "http://" + ipAddress + ":" + port;
EurekaUrlAction ua = new EurekaUrlAction();
ua.Url = newUrl;
if (!Contains(urlsOfApp, newUrl))
{
EurekaUrlAction eua = new EurekaUrlAction();
eua.Url = newUrl;
eua.IsActive = true;
eua.Count = 0;
urlsOfApp.Add(eua);
}
}
}
}
}
lock (_EurekaUrls)
{
_EurekaUrls.Remove(app);
_EurekaUrls.Add(app, urlsOfApp);
}
return(true);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return(false);
}
}
private static T CommWithStatus <T, U>(MyComWithStatus <T, U> func, String app, String relativeUrl, out String statusCode, U parms)
{
List <EurekaUrlAction> urls = new List <EurekaUrlAction>();
if (!_EurekaUrls.TryGetValue(app, out urls))
{
RefreshEurekaUrls(app);
urls = _EurekaUrls[app];
}
bool success = false;
String errorMessage = String.Empty;
T result = default(T);
String status = String.Empty;
int count = urls.Count;
for (int i = 0; i < count; i++)
{
EurekaUrlAction eua = urls[i];
try
{
if ((eua.IsActive && eua.Count < invalidCount) || (!eua.IsActive && eua.Count == revokeCount))
{
// 获取数据
result = func(eua.Url + relativeUrl, out status, parms);
success = true;
lock (urls) // 获取数据成功，将已使用的地址轮换至最后以平衡服务器
{
eua.IsActive = true;
eua.Count = 0;
urls.Remove(eua);
urls.Add(eua);
}
}
else
{
lock (urls)
{
if (eua.IsActive)
{
//该地址失效次数过多，被熔断
eua.IsActive = false;
eua.Count = 0;
}
else
{
//次数+1
eua.Count++;
}
}
}
}
catch (BizCustomException bex)
{
lock (urls) // 出现业务异常，跳出，将已使用的地址轮换至最后以平衡服务器
{
eua.IsActive = true;
eua.Count = 0;
urls.Remove(eua);
urls.Add(eua);
}
throw bex;
}
catch (Exception ex)
{
errorMessage += eua.Url + relativeUrl + " --- " + ex.Message + "\r\n";
lock (urls)
{
if (eua.IsActive)
{
eua.Count++;
}
else
{
eua.Count = 0;
}
}
}
if (success)
{
break;
}
}
if (success)
{
statusCode = status;
return(result);
}
else
{
throw new Exception(errorMessage);
}
}