private void PollForTracingCommand(object state)
{
// Make sure that any transient errors don't cause the listener thread to exit.
try
{
// Perform initialization when the timer fires for the first time.
if (m_traceFilePath == null)
{
// Set file paths.
m_traceFilePath = GetDisambiguatedTraceFilePath(Config_EventPipeOutputFile);
m_markerFilePath = MarkerFilePath;
// Marker file is assumed to not exist.
// This will be updated when the monitoring thread starts.
m_markerFileExists = false;
}
// Check for existence of the file.
// If the existence of the file has changed since the last time we checked
// this means that we need to act on that change.
bool fileExists = File.Exists(m_markerFilePath);
if (m_markerFileExists != fileExists)
{
// Save the result.
m_markerFileExists = fileExists;
// Take the appropriate action.
if (fileExists)
{
// Enable tracing.
EventPipe.Enable(GetConfiguration());
}
else
{
// Disable tracing.
EventPipe.Disable();
}
}
// Schedule the timer to run again.
m_timer.Change(fileExists ? EnabledPollingIntervalMilliseconds : DisabledPollingIntervalMilliseconds, Timeout.Infinite);
}
catch { }
}
private void PollForTracingCommand(object state)
{
// Make sure that any transient errors don't cause the listener thread to exit.
try
{
// Check for existence of the config file.
// If the existence of the file has changed since the last time we checked or the update time has changed
// this means that we need to act on that change.
bool fileExists = File.Exists(m_configFilePath);
if (m_configFileExists != fileExists)
{
// Save the result.
m_configFileExists = fileExists;
// Take the appropriate action.
if (fileExists)
{
// Enable tracing.
// Check for null here because it's possible that the configuration contains a process filter
// that doesn't match the current process. IF this occurs, we should't enable tracing.
EventPipeConfiguration config = BuildConfigFromFile(m_configFilePath);
if (config != null)
{
EventPipe.Enable(config);
}
}
else
{
// Disable tracing.
EventPipe.Disable();
}
}
// Schedule the timer to run again.
m_timer.Change(fileExists ? EnabledPollingIntervalMilliseconds : DisabledPollingIntervalMilliseconds, Timeout.Infinite);
}
catch { }
}
