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Issue #5032 - Servlet / WebApp Metrics Listener Support
Signed-off-by: Joakim Erdfelt <[email protected]>
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jetty-servlet/src/main/java/org/eclipse/jetty/servlet/DebugServletMetricsListener.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| package org.eclipse.jetty.servlet; | ||
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| import org.eclipse.jetty.server.Request; | ||
| import org.eclipse.jetty.servlet.listener.ServletMetricsListener; | ||
| import org.eclipse.jetty.util.log.Log; | ||
| import org.eclipse.jetty.util.log.Logger; | ||
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| public class DebugServletMetricsListener implements ServletMetricsListener | ||
| { | ||
| protected final Logger logger; | ||
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| public DebugServletMetricsListener() | ||
| { | ||
| this(Log.getLogger(DebugServletMetricsListener.class)); | ||
| } | ||
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| public DebugServletMetricsListener(Logger logger) | ||
| { | ||
| this.logger = logger; | ||
| } | ||
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| @Override | ||
| public void onServletContextInitTiming(ServletContextHandler servletContextHandler, long durationNanoSeconds) | ||
| { | ||
| logger.debug("App Context Init: Duration: {} - App {}", toHumanReadableMilliSeconds(durationNanoSeconds), servletContextHandler); | ||
| } | ||
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| @Override | ||
| public void onServletContextInitTiming(ServletContextHandler servletContextHandler, BaseHolder<?> holder, long durationNanoSeconds) | ||
| { | ||
| logger.debug("App Component Init: Duration: {} - Component: {} - App: {}", toHumanReadableMilliSeconds(durationNanoSeconds), holder, servletContextHandler); | ||
| } | ||
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| @Override | ||
| public void onFilterEnter(ServletContextHandler servletContextHandler, FilterHolder filterHolder, Request request) | ||
| { | ||
| logger.debug("Filter Entered: {} - App: {}", filterHolder, servletContextHandler); | ||
| } | ||
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| @Override | ||
| public void onFilterExit(ServletContextHandler servletContextHandler, FilterHolder filterHolder, Request request) | ||
| { | ||
| logger.debug("Filter Exited: {} - App: {}", filterHolder, servletContextHandler); | ||
| } | ||
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| @Override | ||
| public void onServletServiceEnter(ServletContextHandler servletContextHandler, ServletHolder servletHolder, Request request) | ||
| { | ||
| logger.debug("Servlet Entered: {} - App: {}", servletHolder, servletContextHandler); | ||
| } | ||
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| @Override | ||
| public void onServletServiceExit(ServletContextHandler servletContextHandler, ServletHolder servletHolder, Request request) | ||
| { | ||
| logger.debug("Servlet Exited: {} - App: {}", servletHolder, servletContextHandler); | ||
| } | ||
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| protected static String toHumanReadableMilliSeconds(long durationNanoSeconds) | ||
| { | ||
| double durationMilliSeconds = (double)durationNanoSeconds / 1_000_000; | ||
| return String.format("%.4f ms", durationMilliSeconds); | ||
| } | ||
| } |
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100 changes: 100 additions & 0 deletions
100
jetty-servlet/src/main/java/org/eclipse/jetty/servlet/listener/ServletMetricsListener.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // | ||
| // ======================================================================== | ||
| // Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others. | ||
| // ------------------------------------------------------------------------ | ||
| // All rights reserved. This program and the accompanying materials | ||
| // are made available under the terms of the Eclipse Public License v1.0 | ||
| // and Apache License v2.0 which accompanies this distribution. | ||
| // | ||
| // The Eclipse Public License is available at | ||
| // http://www.eclipse.org/legal/epl-v10.html | ||
| // | ||
| // The Apache License v2.0 is available at | ||
| // http://www.opensource.org/licenses/apache2.0.php | ||
| // | ||
| // You may elect to redistribute this code under either of these licenses. | ||
| // ======================================================================== | ||
| // | ||
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| package org.eclipse.jetty.servlet.listener; | ||
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| import javax.servlet.FilterChain; | ||
| import javax.servlet.ServletRequest; | ||
| import javax.servlet.ServletResponse; | ||
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| import org.eclipse.jetty.server.Request; | ||
| import org.eclipse.jetty.servlet.BaseHolder; | ||
| import org.eclipse.jetty.servlet.FilterHolder; | ||
| import org.eclipse.jetty.servlet.ServletContextHandler; | ||
| import org.eclipse.jetty.servlet.ServletHolder; | ||
|
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| /** | ||
| * Listener bean for obtaining events related to servlet initialization / timing, and | ||
| * calls (to Filters and Servlets) within the defined `ServletContextHandler`. | ||
| * <p> | ||
| * This supplements the {@link org.eclipse.jetty.server.HttpChannel.Listener} | ||
| * with events that represent behaviors within a specific `ServletContextHandler`. | ||
| * </p> | ||
| * <p> | ||
| * If there is a Bean present on the `ServletContextHandler` implementing this | ||
| * Listener it is used, otherwise the Server level Bean is used if present. | ||
| * If no bean is discovered, no listener is notified. | ||
| * </p> | ||
| */ | ||
| public interface ServletMetricsListener | ||
| { | ||
| /** | ||
| * Timing for the entire ServletContextHandler startup + initialization. | ||
| * | ||
| * @param servletContextHandler the specific context that was started + initialized. | ||
| * @param durationNanoSeconds the duration in nanoseconds for this startup. | ||
| */ | ||
| void onServletContextInitTiming(ServletContextHandler servletContextHandler, long durationNanoSeconds); | ||
|
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| /** | ||
| * Timing for a specific Filter / Servlet / Listener that was initialized. | ||
| * | ||
| * @param servletContextHandler the specific context that was started + initialized. | ||
| * @param holder this can be a {@link FilterHolder}, a {@link org.eclipse.jetty.servlet.ServletHolder}, or a {@link org.eclipse.jetty.servlet.ListenerHolder} | ||
| * @param durationNanoSeconds the duration in nanoseconds for this initialization. | ||
| */ | ||
| void onServletContextInitTiming(ServletContextHandler servletContextHandler, BaseHolder<?> holder, long durationNanoSeconds); | ||
|
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| /** | ||
| * Event indicating a specific {@link javax.servlet.Filter#doFilter(ServletRequest, ServletResponse, FilterChain)} ` was entered | ||
| * from the Filter chain. | ||
| * | ||
| * @param servletContextHandler the specific context that this event occurred against. | ||
| * @param filterHolder the filter that was entered | ||
| * @param request the request that caused this filter to be entered. | ||
| */ | ||
| void onFilterEnter(ServletContextHandler servletContextHandler, FilterHolder filterHolder, Request request); | ||
|
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| /** | ||
| * Event indicating a specific {@link javax.servlet.Filter#doFilter(ServletRequest, ServletResponse, FilterChain)} ` was exited | ||
| * from the Filter chain. | ||
| * | ||
| * @param servletContextHandler the specific context that this event occurred against. | ||
| * @param filterHolder the filter that was exited | ||
| * @param request the request that caused this filter to be exited. | ||
| */ | ||
| void onFilterExit(ServletContextHandler servletContextHandler, FilterHolder filterHolder, Request request); | ||
|
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| /** | ||
| * Event indicating a specific {@link javax.servlet.Servlet#service(ServletRequest, ServletResponse)} ` was entered. | ||
| * | ||
| * @param servletContextHandler the specific context that this event occurred against. | ||
| * @param servletHolder the servlet that was entered. | ||
| * @param request the request that entered this servlet. | ||
| */ | ||
| void onServletServiceEnter(ServletContextHandler servletContextHandler, ServletHolder servletHolder, Request request); | ||
|
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| /** | ||
| * Event indicating a specific {@link javax.servlet.Servlet#service(ServletRequest, ServletResponse)} ` was exited. | ||
| * | ||
| * @param servletContextHandler the specific context that this event occurred against. | ||
| * @param servletHolder the servlet that was exited. | ||
| * @param request the request that exited this servlet. | ||
| */ | ||
| void onServletServiceExit(ServletContextHandler servletContextHandler, ServletHolder servletHolder, Request request); | ||
| } |
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