private IEnumerable <ServiceEndPoint> RemoteServiceEndpoint(string name)
{
var client = ConsulClientFactory.CreateConsulClient(_options);
var queryOptions = QueryOptions.Default;
queryOptions.Consistency = ConsistencyMode.Stale;
if (!string.IsNullOrEmpty(_options.Token))
{
queryOptions.Token = _options.Token;
}
var queryResult = client.Health.Service(name, "", true, queryOptions).ConfigureAwait(false).GetAwaiter()
.GetResult();
if (!_manager.Contains(name))
{
var token = new ServiceChangeToken(name, queryResult.LastIndex);
if (_manager.TryAdd(name, token))
{
ThreadPool.QueueUserWorkItem(Watch, token);
ChangeToken.OnChange(() => token, InvokeChanged, token.Name);
}
}
var list = new List <ServiceEndPoint>();
foreach (var entry in queryResult.Response)
{
var endpoint = new ServiceEndPoint
{
Id = entry.Service.ID,
Address = entry.Service.Address,
Port = entry.Service.Port,
Weight = 1,
EffectiveWeight = 1,
CurrentWeight = 0
};
list.Add(endpoint);
}
return(list);
}
private void Watch(object state)
{
var token = (ServiceChangeToken)state;
var client = new ConsulClient(c =>
{
c.Address = ConsulClientFactory.BuildConsulUri(_options);
c.Datacenter = _options.Datacenter;
c.WaitTime = c.WaitTime;
});
var queryOptions = QueryOptions.Default;
if (!string.IsNullOrEmpty(_options.Token))
{
queryOptions.Token = _options.Token;
}
while (true)
{
queryOptions.WaitIndex = token.LastIndex;
try
{
var result = client.Health.Service(token.Name, "", true, queryOptions).ConfigureAwait(false)
.GetAwaiter().GetResult();
if (result.LastIndex != token.LastIndex)
{
token.LastIndex = result.LastIndex;
token.OnChange();
}
}
catch (TaskCanceledException)
{
}
catch (Exception e)
{
_logger.LogError(0, e, "监控远程服务时出错");
}
}
}