nl.nlighten.prometheus.wildfly

Class ServletMetricsFilter

java.lang.Object

nl.nlighten.prometheus.wildfly.ServletMetricsFilter

All Implemented Interfaces:

javax.servlet.Filter

public class ServletMetricsFilter
extends Object
implements javax.servlet.Filter

A servlet filter that will be added to deployed servlets by the MetricFilterExtension that provides the following metrics:

- A Histogram with response time distribution per context - A Gauge with the number of concurrent request per context - A Gauge with a the number of responses per context and status code

Example metrics being exported:

     servlet_request_seconds_bucket{"/foo", "GET", "0.1",} 1.0
     ....
     servlet_request_seconds_bucket{"/foo", "GET", "+Inf",} 1.0
     servlet_request_concurrent_total{"/foo",} 1.0
     servlet_response_status_total{"/foo", "200",} 1.0
  

Field Summary

Fields

Modifier and Type	Field and Description
static String	BUCKET_CONFIG_PARAM

Constructor Summary

Constructors

Constructor and Description
ServletMetricsFilter()

Method Summary

Modifier and Type	Method and Description
void	destroy()
void	doFilter(javax.servlet.ServletRequest servletRequest, javax.servlet.ServletResponse servletResponse, javax.servlet.FilterChain filterChain)
void	init(javax.servlet.FilterConfig filterConfig)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BUCKET_CONFIG_PARAM

public static final String BUCKET_CONFIG_PARAM

See Also:

Constant Field Values

Constructor Detail

ServletMetricsFilter

public ServletMetricsFilter()

Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)
          throws javax.servlet.ServletException

Specified by:

init in interface javax.servlet.Filter

Throws:

javax.servlet.ServletException

doFilter

public void doFilter(javax.servlet.ServletRequest servletRequest,
                     javax.servlet.ServletResponse servletResponse,
                     javax.servlet.FilterChain filterChain)
              throws IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

IOException

javax.servlet.ServletException

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter