Class MetricsServlet

  • All Implemented Interfaces:
    java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

    public class MetricsServlet
    extends javax.servlet.http.HttpServlet
    A servlet which returns the metrics in a given registry as an application/json response.
    See Also:
    Serialized Form
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected void doGet​(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)  
      private com.fasterxml.jackson.databind.ObjectWriter getWriter​(javax.servlet.http.HttpServletRequest request)  
      void init​(javax.servlet.ServletConfig config)  
      private java.util.concurrent.TimeUnit parseTimeUnit​(java.lang.String value, java.util.concurrent.TimeUnit defaultValue)  
      • Methods inherited from class javax.servlet.http.HttpServlet

        doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service
      • Methods inherited from class javax.servlet.GenericServlet

        destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • RATE_UNIT

        public static final java.lang.String RATE_UNIT
      • DURATION_UNIT

        public static final java.lang.String DURATION_UNIT
      • SHOW_SAMPLES

        public static final java.lang.String SHOW_SAMPLES
      • METRICS_REGISTRY

        public static final java.lang.String METRICS_REGISTRY
      • ALLOWED_ORIGIN

        public static final java.lang.String ALLOWED_ORIGIN
      • allowedOrigin

        private java.lang.String allowedOrigin
      • mapper

        private transient com.fasterxml.jackson.databind.ObjectMapper mapper
    • Constructor Detail

      • MetricsServlet

        public MetricsServlet()
    • Method Detail

      • init

        public void init​(javax.servlet.ServletConfig config)
                  throws javax.servlet.ServletException
        Specified by:
        init in interface javax.servlet.Servlet
        Overrides:
        init in class javax.servlet.GenericServlet
        Throws:
        javax.servlet.ServletException
      • doGet

        protected void doGet​(javax.servlet.http.HttpServletRequest req,
                             javax.servlet.http.HttpServletResponse resp)
                      throws javax.servlet.ServletException,
                             java.io.IOException
        Overrides:
        doGet in class javax.servlet.http.HttpServlet
        Throws:
        javax.servlet.ServletException
        java.io.IOException
      • getWriter

        private com.fasterxml.jackson.databind.ObjectWriter getWriter​(javax.servlet.http.HttpServletRequest request)
      • parseTimeUnit

        private java.util.concurrent.TimeUnit parseTimeUnit​(java.lang.String value,
                                                            java.util.concurrent.TimeUnit defaultValue)