public ContainerStatsValve(InvocationStatistics stats) 
{
                          
      super();
      this.stats = stats;
}

Create a new Valve.

Parameters:

catalina - The container associated with the valve.

 public  void addLifecycleListener(LifecycleListener listener) 
{
      support.addLifecycleListener(listener);
}

 public LifecycleListener[] findLifecycleListeners() 
{
      return support.findLifecycleListeners();
}

 public String getInfo() 
{
      return info;
}

Get information about this Valve.

 public  void invoke(Request request,
    Response response,
    ValveContext context) throws IOException, ServletException 
{
      long start = System.currentTimeMillis();
      // increment active thread count
      stats.callIn();
      // let the servlet invokation go through
      context.invokeNext(request, response);
      // decrement active thread count
      stats.callOut();
      // Update the web context invocation stats
      long end = System.currentTimeMillis();
      long elapsed = end - start;
      String webCtx = request.getContext().getName();
      stats.updateStats(webCtx, elapsed);
}

Valve-chain handler method. This method gets called when the request goes through the Valve-chain. The activeThreadCount attribute gets incremented/decremented before/after the servlet invocation.

 public  void removeLifecycleListener(LifecycleListener listener) 
{
      support.removeLifecycleListener(listener);
}

 public  void start() throws LifecycleException 
{
      support.fireLifecycleEvent(START_EVENT, this);
}

 public  void stop() throws LifecycleException 
{
      support.fireLifecycleEvent(STOP_EVENT, this);
      stats = null;
}