public Task AddListenerAsync(AddListenerRequest request)
{
if (request == null)
{
throw new NacosException(ConstValue.CLIENT_INVALID_PARAM, "request param invalid");
}
if (string.IsNullOrWhiteSpace(request.Tenant))
{
request.Tenant = _options.Namespace;
}
if (string.IsNullOrWhiteSpace(request.Group))
{
request.Group = ConstValue.DefaultGroup;
}
request.CheckParam();
var name = BuildName(request.Tenant, request.Group, request.DataId);
if (listeners.Any(x => x.Name.Equals(name, StringComparison.OrdinalIgnoreCase)))
{
_logger.LogWarning($"[add-listener] error, {name} has been added.");
return(Task.CompletedTask);
}
Timer timer = new Timer(
async x =>
{
await PollingAsync(x);
#if !DEBUG
}, request, 0, _options.ListenInterval);
#else
}, request, 0, 8000);
private async Task ConfigChangeAsync(string content, AddListenerRequest request)
{
// config was changed
if (!string.IsNullOrWhiteSpace(content))
{
var config = await DoGetConfigAsync(new GetConfigRequest
{
DataId = request.DataId,
Group = request.Group,
Tenant = request.Tenant
}).ConfigureAwait(false);
// update local cache
await GetProcessor().SaveSnapshotAsync(GetAgent().GetName(), request.DataId, request.Group, request.Tenant, config).ConfigureAwait(false);
// callback
foreach (var cb in request.Callbacks)
{
try
{
cb(config);
}
catch (Exception ex)
{
_logger?.LogError(ex, $"[listener] call back throw exception, dataId={request.DataId}, group={request.Group}, tenant={request.Tenant}");
}
}
}
}
public Task AddListenerAsync(AddListenerRequest request)
{
if (request == null)
{
throw new NacosException(NacosException.CLIENT_INVALID_PARAM, "request param invalid");
}
if (string.IsNullOrWhiteSpace(request.Tenant))
{
request.Tenant = _options.Namespace;
}
if (string.IsNullOrWhiteSpace(request.Group))
{
request.Group = ConstValue.DefaultGroup;
}
request.CheckParam();
var name = BuildName(request.Tenant, request.Group, request.DataId);
if (listeners.Any(x => x.Name.Equals(name, StringComparison.OrdinalIgnoreCase)))
{
_logger?.LogWarning($"[add-listener] error, {name} has been added.");
return(Task.CompletedTask);
}
var cts = new CancellationTokenSource();
_ = PollingAsync(request, cts.Token);
listeners.Add(new Listener(name, cts));
return(Task.CompletedTask);
}
private async Task PollingAsync(AddListenerRequest request, CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
// read the last config
var lastConfig = await GetProcessor().GetSnapshotAync(GetAgent().GetName(), request.DataId, request.Group, request.Tenant).ConfigureAwait(false);
request.Content = lastConfig;
try
{
var headers = new Dictionary <string, string>()
{
{ "Long-Pulling-Timeout", (ConstValue.LongPullingTimeout * 1000).ToString() }
};
var responseMessage = await GetAgent().PostAsync(RequestPathValue.CONFIGS_LISTENER, headers, request.ToDict(), cancellationToken).ConfigureAwait(false);
switch (responseMessage.StatusCode)
{
case System.Net.HttpStatusCode.OK:
SetHealthServer(true);
var content = await responseMessage.Content.ReadAsStringAsync().ConfigureAwait(false);
await ConfigChangeAsync(content, request).ConfigureAwait(false);
break;
case System.Net.HttpStatusCode.Forbidden:
SetHealthServer(false);
_logger?.LogWarning($"[listener] error, dataId={request.DataId}, group={request.Group}, tenant={request.Tenant}, code={(int)responseMessage.StatusCode} msg={responseMessage.StatusCode.ToString()}");
throw new NacosException(NacosException.NO_RIGHT, $"Insufficient privilege.");
default:
SetHealthServer(false);
_logger?.LogWarning($"[listener] error, dataId={request.DataId}, group={request.Group}, tenant={request.Tenant}, code={(int)responseMessage.StatusCode} msg={responseMessage.StatusCode.ToString()}");
throw new NacosException((int)responseMessage.StatusCode, responseMessage.StatusCode.ToString());
}
}
catch (Exception ex)
{
SetHealthServer(false);
_logger?.LogError(ex, $"[listener] error, dataId={request.DataId}, group={request.Group}, tenant={request.Tenant}");
}
}
}