public void PublishConfig(BucketConfig bucketConfig)
{
_logger.LogDebug(LoggingEvents.ConfigEvent, JsonConvert.SerializeObject(bucketConfig));
_configHandler.Publish(bucketConfig);
}
private Task StartBackgroundTask()
{
// Ensure that we don't flow the ExecutionContext into the long running task below
using var flowControl = ExecutionContext.SuppressFlow();
return(Task.Run(async() =>
{
var delayMs = InitialDelayMs;
var bucket = _bucket as BucketBase;
while (!_cancellationTokenSource.IsCancellationRequested)
{
try
{
var nodes = bucket?.Nodes.ToList().Shuffle();
while (nodes != null && nodes.Any())
{
try
{
var node = nodes.First();
nodes?.Remove(node);
_logger.LogDebug("HTTP Streaming with node {node}", node.EndPoint.Host);
var streamingUri = new UriBuilder()
{
Scheme =
_clusterOptions.EffectiveEnableTls ? Uri.UriSchemeHttps : Uri.UriSchemeHttp,
Host = node.ManagementUri.Host,
Port = node.ManagementUri.Port,
Path = _streamingUriPath
};
using var httpClient = _httpClientFactory.Create();
httpClient.Timeout = Timeout.InfiniteTimeSpan;
var response = await httpClient.GetAsync(streamingUri.Uri,
HttpCompletionOption.ResponseHeadersRead,
_cancellationTokenSource.Token).ConfigureAwait(false);
response.EnsureSuccessStatusCode();
using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
if (stream.CanTimeout)
{
//the stream itself can timeout if CanTimeout is true on a platform
stream.ReadTimeout = Timeout.Infinite;
}
using var reader = new StreamReader(stream, Encoding.UTF8, false);
string?config;
while (!_cancellationTokenSource.IsCancellationRequested &&
(config = await reader.ReadLineAsync().ConfigureAwait(false)) != null)
{
if (config != string.Empty)
{
_logger.LogDebug(LoggingEvents.ConfigEvent, config);
config = config.Replace("$HOST", node.EndPoint.Host);
var bucketConfig = JsonSerializer.Deserialize(config,
InternalSerializationContext.Default.BucketConfig) !;
_configHandler.Publish(bucketConfig);
}
// on success, reset the exponential delay
delayMs = InitialDelayMs;
}
}
catch (Exception e)
{
_logger.LogError(e, "HTTP Streaming error.");
}
}
}
catch (Exception e)
{
_logger.LogError(e, "HTTP Streaming error. (outer loop)");
}
// if we exited the inner loop, then all servers failed and we need to start over.
// however, we don't want to create a failstorm in the logs if the failure is 100%
// try again, but with an exponential delay of up to 10s.
await Task.Delay(delayMs).ConfigureAwait(false);
delayMs = Math.Min(delayMs * 10, MaxDelayMs);
}
}, _cancellationTokenSource.Token));
}
public void PublishConfig(BucketConfig bucketConfig)
{
_configHandler.Publish(bucketConfig);
}
private Task StartBackgroundTask()
{
return(Task.Run(async() =>
{
_httpClient.Timeout = Timeout.InfiniteTimeSpan;
var delayMs = InitialDelayMs;
while (!_cancellationTokenSource.IsCancellationRequested)
{
try
{
var servers = _clusterOptions.ConnectionStringValue?.GetBootstrapEndpoints().ToList().Shuffle();
while (servers.Any())
{
try
{
var server = servers.First();
servers?.Remove(server);
var streamingUri = new UriBuilder()
{
Scheme =
_clusterOptions.EffectiveEnableTls ? Uri.UriSchemeHttps : Uri.UriSchemeHttp,
Host = server.Host,
Port = _clusterOptions.BootstrapHttpPort,
Path = _streamingUriPath
};
var response = await _httpClient.GetAsync(streamingUri.Uri,
HttpCompletionOption.ResponseHeadersRead,
_cancellationTokenSource.Token).ConfigureAwait(false);
response.EnsureSuccessStatusCode();
using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
if (stream.CanTimeout)
{
//the stream itself can timeout if CanTimeout is true on a platform
stream.ReadTimeout = Timeout.Infinite;
}
using var reader = new StreamReader(stream, Encoding.UTF8, false);
string?config;
while (!_cancellationTokenSource.IsCancellationRequested &&
(config = await reader.ReadLineAsync().ConfigureAwait(false)) != null)
{
if (config != string.Empty)
{
_logger.LogDebug(LoggingEvents.ConfigEvent, config);
config = config.Replace("$HOST", server.Host);
var bucketConfig = JsonConvert.DeserializeObject <BucketConfig>(config);
_configHandler.Publish(bucketConfig);
}
// on success, reset the exponential delay
delayMs = InitialDelayMs;
}
}
catch (Exception e)
{
_logger.LogError(e, "HTTP Streaming error.");
}
}
}
catch (Exception e)
{
_logger.LogError(e, "HTTP Streaming error. (outer loop)");
}
// if we exited the inner loop, then all servers failed and we need to start over.
// however, we don't want to create a failstorm in the logs if the failure is 100%
// try again, but with an exponential delay of up to 10s.
await Task.Delay(delayMs).ConfigureAwait(false);
delayMs = Math.Min(delayMs * 10, MaxDelayMs);
}
}, _cancellationTokenSource.Token));
}
public void StartListening()
{
if (_disposed)
{
throw new ObjectDisposedException(nameof(HttpStreamingConfigListener));
}
if (Started)
{
return;
}
Started = true;
var streamingUriPath = "/pools/default/bs/" + _bucketName;
Task.Run(async() =>
{
_httpClient.Timeout = Timeout.InfiniteTimeSpan;
var servers = _clusterOptions.ConnectionStringValue !.GetBootstrapEndpoints().ToList().Shuffle();
while (servers.Any())
{
try
{
var server = servers.First();
servers.Remove(server);
var streamingUri = new UriBuilder()
{
Scheme = _clusterOptions.EffectiveEnableTls ? Uri.UriSchemeHttps : Uri.UriSchemeHttp,
Host = server.Host,
Port = _clusterOptions.BootstrapHttpPort,
Path = streamingUriPath
};
var response = await _httpClient.GetAsync(streamingUri.Uri,
HttpCompletionOption.ResponseHeadersRead,
_cancellationTokenSource.Token).ConfigureAwait(false);
response.EnsureSuccessStatusCode();
using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
if (stream.CanTimeout)
{
//the stream itself can timeout if CanTimeout is true on a platform
stream.ReadTimeout = Timeout.Infinite;
}
using var reader = new StreamReader(stream, Encoding.UTF8, false);
string?config;
while (!_cancellationTokenSource.IsCancellationRequested &&
(config = await reader.ReadLineAsync().ConfigureAwait(false)) != null)
{
if (config != string.Empty)
{
_logger.LogDebug(LoggingEvents.ConfigEvent, config);
config = config.Replace("$HOST", server.Host);
var bucketConfig = JsonConvert.DeserializeObject <BucketConfig>(config);
_configHandler.Publish(bucketConfig);
}
}
}
catch (Exception e)
{
_logger.LogError(e, "HTTP Streaming error.");
}
}
}, _cancellationTokenSource.Token);
}
