Jersey log all response times for services

Question

I have a Java application and I want to log all execution times for each REST service.

How to measure execution time for each request? How the filter will be configured?

Ultra

Answer 1

I added a filter to all service requests an it works fine:

public void doFilter(ServletRequest request, ServletResponse response,
        FilterChain p_filterChain) throws IOException, ServletException {


    long startTime = System.currentTimeMillis();
    String url = "unknown"; 
    if (request instanceof HttpServletRequest) {
         url = ((HttpServletRequest)request).getRequestURL().toString();
         String queryString = ((HttpServletRequest)request).getQueryString();
         if(queryString != null)
             url += "?" + queryString;
    }


    p_filterChain.doFilter(request, response);

    long stopTime = System.currentTimeMillis();
    long elapsedTime = stopTime - startTime;

    LogManager logm = new LogManager();
    logm.newLog(url,elapsedTime);
    System.out.println("Request: " + url + "  " + elapsedTime + "ms");        
}

Ultra

Answer 2

Jersey event listeners must be what you're after.

There are two flavors of such event listeners as mentioned in their docs on monitoring and tracing:

• ApplicationEventListener for listening to application events, and
• RequestEventListener for listening to events of request processing

Only the first type, ApplicationEventListener can be directly registered as an application-wide provider. The RequestEventListener is designed to be specific to every request and can be only returned from the ApplicationEventListener as such.

Adaminah

What packages would be? I have available this: com.sun.jersey.spi.monitoring.RequestListener – Ultra

I've also adopted this aproach. Implement both listeners seems to be the most suitable solution. Packages for Jersey 2.* are org.glassfish.jersey.server.monitoring – Ostensible

If you click on the user guide in the link provided in this answer and check (at the time of this comment) Example 22.2. Request event listener you will see an example on how to get the time it took to complete the request. – Alumnus