public Meta Load()
{
List<string> metaServerList = metaServerLocator.GetMetaServerList();
if (metaServerList == null || metaServerList.Count == 0)
{
throw new Exception("No meta server found.");
}
List<String> ipPorts = new List<String>(metaServerList);
ipPorts.Shuffle();
foreach (string ipPort in ipPorts)
{
log.Debug(string.Format("Loading meta from server: {0}", ipPort));
try
{
string url = string.Format("http://{0}/meta", ipPort);
if (metaCache.ReadFullFence() != null)
{
url += "?version=" + metaCache.ReadFullFence().Version;
}
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Timeout = config.MetaServerConnectTimeoutInMills + config.MetaServerReadTimeoutInMills;
using (HttpWebResponse res = (HttpWebResponse)req.BetterGetResponse())
{
HttpStatusCode statusCode = res.StatusCode;
if (statusCode == HttpStatusCode.OK)
{
using (var stream = new StreamReader(res.GetResponseStream(), Encoding.UTF8))
{
string responseContent = stream.ReadToEnd();
JsonSerializerSettings settings = new JsonSerializerSettings();
settings.NullValueHandling = NullValueHandling.Ignore;
metaCache.WriteFullFence(JsonConvert.DeserializeObject<Meta>(responseContent, settings));
return metaCache.ReadFullFence();
}
}
else if (statusCode == HttpStatusCode.NotModified)
{
return metaCache.ReadFullFence();
}
}
}
catch (Exception ex)
{
log.Error(ex);
}
}
throw new Exception(string.Format("Failed to load remote meta from {0}", ipPorts));
}
public static void fetchMeta()
{
string url = "http://meta.hermes.fws.qa.nt.ctripcorp.com/meta";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create (url);
req.Timeout = 5000;
HttpWebResponse res = (HttpWebResponse)req.GetResponse ();
HttpStatusCode statusCode = res.StatusCode;
if (statusCode == HttpStatusCode.OK) {
string responseContent = new StreamReader (res.GetResponseStream (), Encoding.UTF8).ReadToEnd ();
JsonSerializerSettings settings = new JsonSerializerSettings();
settings.NullValueHandling = NullValueHandling.Ignore;
Meta meta = JsonConvert.DeserializeObject<Meta> (responseContent, settings);
Console.WriteLine (JsonConvert.SerializeObject (meta));
} else if (statusCode == HttpStatusCode.NotModified) {
}
}
