internal Message(Frame frame, NsqTcpConnection connection)
{
_connection = connection;
if (frame.Type != FrameType.Message)
{
throw new ArgumentException("Frame must have FrameType 'Message'", "frame");
}
if (BitConverter.IsLittleEndian)
{
Array.Reverse(frame.Data, TIMESTAMP_START, TIMESTAMP_COUNT);
Array.Reverse(frame.Data, ATTEMPTS_START, ATTEMPTS_COUNT);
}
Timestamp = BitConverter.ToInt64(frame.Data, TIMESTAMP_START);
Attempts = BitConverter.ToInt16(frame.Data, ATTEMPTS_START);
Id = Encoding.ASCII.GetString(frame.Data, ID_START, ID_COUNT);
// Data
var dataLength = frame.Data.Length - DATA_START;
Body = new byte[dataLength];
Array.ConstrainedCopy(frame.Data, DATA_START, Body, 0, dataLength);
}
void ConnectButton_Click(object sender, EventArgs e)
{
var host = Host.Text;
var port = int.Parse(Port.Text);
var options = ConsumerOptions.Parse(string.Format("nsqd={0}:{1}", host, port));
options.Topic = TopicTextBox.Text;
options.Channel = ChannelTextBox.Text;
_nsq = new NsqTcpConnection(new DnsEndPoint(host, port), options);
_nsq.InternalMessages += _nsq_InternalMessages;
_nsq.Connect(async msg =>
{
await c_MessageReceived(msg);
await msg.FinishAsync();
});
}
internal Message(Frame frame, NsqTcpConnection connection)
{
_connection = connection;
if (frame.Type != FrameType.Message)
throw new ArgumentException("Frame must have FrameType 'Message'", "frame");
if (BitConverter.IsLittleEndian)
{
Array.Reverse(frame.Data, TIMESTAMP_START, TIMESTAMP_COUNT);
Array.Reverse(frame.Data, ATTEMPTS_START, ATTEMPTS_COUNT);
}
Timestamp = BitConverter.ToInt64(frame.Data, TIMESTAMP_START);
Attempts = BitConverter.ToInt16(frame.Data, ATTEMPTS_START);
Id = Encoding.ASCII.GetString(frame.Data, ID_START, ID_COUNT);
// Data
var dataLength = frame.Data.Length - DATA_START;
Body = new byte[dataLength];
Array.ConstrainedCopy(frame.Data, DATA_START, Body, 0, dataLength);
}
void LookupTask(object messageHandler)
{
MessageHandler handler = (MessageHandler)messageHandler;
OnInternalMessage("Begin lookup cycle");
int beginningCount, endingCount,
added = 0, removed = 0;
List<DnsEndPoint> currentEndPoints;
List<NsqAddress> nsqAddresses;
lock (_connections)
{
var tasks = _lookupServers.Select(server => server.LookupAsync(_options.Topic)).ToList();
var delay = Task.Delay(5000);
Task.WhenAny(Task.WhenAll(tasks), delay).Wait();
nsqAddresses =
tasks.Where(t => t.Status == TaskStatus.RanToCompletion)
.SelectMany(t => t.Result)
.Distinct()
.ToList();
var servers =
nsqAddresses
.Select(add => new DnsEndPoint(add.BroadcastAddress, add.TcpPort))
.ToList();
currentEndPoints = _connections.Keys.ToList();
var newEndPoints = servers.Except(currentEndPoints).ToList();
var removedEndPoints = currentEndPoints.Except(servers).ToList();
foreach (var endPoint in removedEndPoints)
{
var connection = _connections[endPoint];
_connections.Remove(endPoint);
connection.Dispose();
removed++;
}
foreach (var endPoint in newEndPoints)
{
if (!_connections.ContainsKey(endPoint))
{
var connection = new NsqTcpConnection(endPoint, _options, _noRetryBackoff);
connection.InternalMessages +=
((EventHandler<InternalMessageEventArgs>)((sender, e) => OnInternalMessage("{0}: {1}", endPoint, e.Message)));
try
{
connection.Connect(handler);
_connections[endPoint] = connection;
added++;
}
catch (Exception ex)
{
// If Connect() fails, move on with life
// We'll try again next round
OnInternalMessage("Connection to endpoint {0} failed: {1}", endPoint, ex.Message);
}
}
}
beginningCount = currentEndPoints.Count;
endingCount = _connections.Count;
SetMaxInFlightWithoutWaitingForInitialConnectionAsync(_maxInFlight).Wait();
}
if (_firstDiscoveryCycle)
{
_firstConnectionTaskCompletionSource.TrySetResult(true);
_firstDiscoveryCycle = false;
}
OnDiscoveryCompleted(nsqAddresses);
OnInternalMessage("End lookup cycle. BeginningCount = {0}, EndingCount = {1}, Added = {2}, Removed = {3}", beginningCount, endingCount, added, removed);
}
void LookupTask(object messageHandler)
{
MessageHandler handler = (MessageHandler)messageHandler;
OnInternalMessage("Begin lookup cycle");
int beginningCount, endingCount,
added = 0, removed = 0;
List <DnsEndPoint> currentEndPoints;
List <NsqAddress> nsqAddresses;
lock (_connections)
{
var tasks = _lookupServers.Select(server => server.LookupAsync(_options.Topic)).ToList();
var delay = Task.Delay(5000);
Task.WhenAny(Task.WhenAll(tasks), delay).Wait();
nsqAddresses =
tasks.Where(t => t.Status == TaskStatus.RanToCompletion)
.SelectMany(t => t.Result)
.Distinct()
.ToList();
var servers =
nsqAddresses
.Select(add => new DnsEndPoint(add.BroadcastAddress, add.TcpPort))
.ToList();
currentEndPoints = _connections.Keys.ToList();
var newEndPoints = servers.Except(currentEndPoints).ToList();
var removedEndPoints = currentEndPoints.Except(servers).ToList();
foreach (var endPoint in removedEndPoints)
{
var connection = _connections[endPoint];
_connections.Remove(endPoint);
connection.Dispose();
removed++;
}
foreach (var endPoint in newEndPoints)
{
if (!_connections.ContainsKey(endPoint))
{
var connection = new NsqTcpConnection(endPoint, _options, _noRetryBackoff);
connection.InternalMessages +=
((EventHandler <InternalMessageEventArgs>)((sender, e) => OnInternalMessage("{0}: {1}", endPoint, e.Message)));
try
{
connection.Connect(handler);
_connections[endPoint] = connection;
added++;
}
catch (Exception ex)
{
// If Connect() fails, move on with life
// We'll try again next round
OnInternalMessage("Connection to endpoint {0} failed: {1}", endPoint, ex.Message);
}
}
}
beginningCount = currentEndPoints.Count;
endingCount = _connections.Count;
SetMaxInFlightWithoutWaitingForInitialConnectionAsync(_maxInFlight).Wait();
}
if (_firstDiscoveryCycle)
{
_firstConnectionTaskCompletionSource.TrySetResult(true);
_firstDiscoveryCycle = false;
}
OnDiscoveryCompleted(nsqAddresses);
OnInternalMessage("End lookup cycle. BeginningCount = {0}, EndingCount = {1}, Added = {2}, Removed = {3}", beginningCount, endingCount, added, removed);
}
