Package com.codahale.metrics.servlet

Class AbstractInstrumentedFilter

java.lang.Object

com.codahale.metrics.servlet.AbstractInstrumentedFilter

All Implemented Interfaces:

javax.servlet.Filter

Direct Known Subclasses:

InstrumentedFilter

public abstract class AbstractInstrumentedFilter
extends java.lang.Object
implements javax.servlet.Filter

Filter implementation which captures request information and a breakdown of the response codes being returned.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	AbstractInstrumentedFilter.StatusExposingServletResponse

Field Summary

Fields

Modifier and Type	Field	Description
private Counter	activeRequests
private java.util.Map<java.lang.Integer,java.lang.String>	meterNamesByStatusCode
private java.util.concurrent.ConcurrentMap<java.lang.Integer,Meter>	metersByStatusCode
private Meter	otherMeter
private java.lang.String	otherMetricName
private java.lang.String	registryAttribute
private Timer	requestTimer

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractInstrumentedFilter(java.lang.String registryAttribute, java.util.Map<java.lang.Integer,java.lang.String> meterNamesByStatusCode, java.lang.String otherMetricName)	Creates a new instance of the filter.

Method Summary

Modifier and Type	Method	Description
void	destroy()
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
private MetricRegistry	getMetricsFactory(javax.servlet.FilterConfig filterConfig)
void	init(javax.servlet.FilterConfig filterConfig)
private void	markMeterForStatusCode(int status)

Methods inherited from class java.lang.Object

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

Field Detail

otherMetricName

private final java.lang.String otherMetricName

meterNamesByStatusCode

private final java.util.Map<java.lang.Integer,java.lang.String> meterNamesByStatusCode

registryAttribute

private final java.lang.String registryAttribute

metersByStatusCode

private java.util.concurrent.ConcurrentMap<java.lang.Integer,Meter> metersByStatusCode

otherMeter

private Meter otherMeter

activeRequests

private Counter activeRequests

requestTimer

private Timer requestTimer

Constructor Detail

AbstractInstrumentedFilter

protected AbstractInstrumentedFilter(java.lang.String registryAttribute,
                                     java.util.Map<java.lang.Integer,java.lang.String> meterNamesByStatusCode,
                                     java.lang.String otherMetricName)

Creates a new instance of the filter.

Parameters:

registryAttribute - the attribute used to look up the metrics registry in the servlet context

meterNamesByStatusCode - A map, keyed by status code, of meter names that we are interested in.

otherMetricName - The name used for the catch-all meter.

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

getMetricsFactory

private MetricRegistry getMetricsFactory(javax.servlet.FilterConfig filterConfig)

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter

doFilter

public void doFilter(javax.servlet.ServletRequest request,
                     javax.servlet.ServletResponse response,
                     javax.servlet.FilterChain chain)
              throws java.io.IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

java.io.IOException

javax.servlet.ServletException

markMeterForStatusCode

private void markMeterForStatusCode(int status)