public MockTracerAgent(int port = 8126, int retries = 5)
{
// try up to 5 consecutive ports before giving up
while (true)
{
// seems like we can't reuse a listener if it fails to start,
// so create a new listener each time we retry
var listener = new HttpListener();
listener.Prefixes.Add($"http://localhost:{port}/");
try
{
listener.Start();
// successfully listening
Port = port;
_listener = listener;
_listenerThread = new Thread(HandleHttpRequests);
_listenerThread.Start();
return;
}
catch (HttpListenerException) when(retries > 0)
{
// only catch the exception if there are retries left
port = TcpPortProvider.GetOpenPort();
retries--;
}
// always close listener if exception is thrown,
// whether it was caught or not
listener.Close();
}
}
public MockTracerAgent(int port = 8126, int retries = 5, bool useStatsd = false)
{
_cancellationTokenSource = new CancellationTokenSource();
if (useStatsd)
{
const int basePort = 11555;
var retriesLeft = retries;
while (true)
{
try
{
_udpClient = new UdpClient(basePort + retriesLeft);
}
catch (Exception) when(retriesLeft > 0)
{
retriesLeft--;
continue;
}
_statsdThread = new Thread(HandleStatsdRequests)
{
IsBackground = true
};
_statsdThread.Start();
StatsdPort = basePort + retriesLeft;
break;
}
}
// try up to 5 consecutive ports before giving up
while (true)
{
// seems like we can't reuse a listener if it fails to start,
// so create a new listener each time we retry
var listener = new HttpListener();
listener.Prefixes.Add($"http://127.0.0.1:{port}/");
listener.Prefixes.Add($"http://localhost:{port}/");
try
{
listener.Start();
// successfully listening
Port = port;
_listener = listener;
_listenerThread = new Thread(HandleHttpRequests);
_listenerThread.Start();
return;
}
catch (HttpListenerException) when(retries > 0)
{
// only catch the exception if there are retries left
port = TcpPortProvider.GetOpenPort();
retries--;
}
// always close listener if exception is thrown,
// whether it was caught or not
listener.Close();
}
}
public MockTracerAgent(int port = 8126, int retries = 5, bool useStatsd = false, bool doNotBindPorts = false, int?requestedStatsDPort = null)
{
_cancellationTokenSource = new CancellationTokenSource();
if (doNotBindPorts)
{
// This is for any tests that want to use a specific port but never actually bind
Port = port;
return;
}
var listeners = new List <string>();
if (useStatsd)
{
if (requestedStatsDPort != null)
{
// This port is explicit, allow failure if not available
StatsdPort = requestedStatsDPort.Value;
_udpClient = new UdpClient(requestedStatsDPort.Value);
}
else
{
const int basePort = 11555;
var retriesLeft = retries;
while (true)
{
try
{
_udpClient = new UdpClient(basePort + retriesLeft);
}
catch (Exception) when(retriesLeft > 0)
{
retriesLeft--;
continue;
}
StatsdPort = basePort + retriesLeft;
break;
}
}
_statsdTask = Task.Run(HandleStatsdRequests);
listeners.Add($"Stats at port {StatsdPort}");
}
// try up to 5 consecutive ports before giving up
while (true)
{
// seems like we can't reuse a listener if it fails to start,
// so create a new listener each time we retry
var listener = new HttpListener();
listener.Prefixes.Add($"http://127.0.0.1:{port}/");
listener.Prefixes.Add($"http://localhost:{port}/");
var containerHostname = EnvironmentHelpers.GetEnvironmentVariable("CONTAINER_HOSTNAME");
if (containerHostname != null)
{
listener.Prefixes.Add($"{containerHostname}:{port}/");
}
try
{
listener.Start();
// successfully listening
Port = port;
_listener = listener;
listeners.Add($"Traces at port {Port}");
_tracesListenerTask = Task.Run(HandleHttpRequests);
return;
}
catch (HttpListenerException) when(retries > 0)
{
// only catch the exception if there are retries left
port = TcpPortProvider.GetOpenPort();
retries--;
}
finally
{
ListenerInfo = string.Join(", ", listeners);
}
// always close listener if exception is thrown,
// whether it was caught or not
listener.Close();
}
}
