Metrics

It logs whatever is happening to the JVM core so data can be analyzed later on.

It can also feed the data in real-time to system monitoring tools like Graphite and Ganglia.

Modules exists for Metrics to be used with Java frameworks like Jetty, Log4j, Apache HttpClient, Ehcache, Logback, Guice and Spring.

What is new in this release:

• ScheduledReporter and JmxReporter now implement Closeable.
• Fixed cast exception for async requests in metrics-jetty9.
• Added support for Access-Control-Allow-Origin to MetricsServlet.
• Fixed numerical issue with Meter EWMA rates.
• Deprecated AdminServletContextListener in favor of MetricsServlet.ContextListener and HealthCheckServlet.ContextListener.
• Added additional constructors to HealthCheckServlet and MetricsServlet.

What is new in version 3.1.1:

• ScheduledReporter and JmxReporter now implement Closeable.
• Fixed cast exception for async requests in metrics-jetty9.
• Added support for Access-Control-Allow-Origin to MetricsServlet.
• Fixed numerical issue with Meter EWMA rates.
• Deprecated AdminServletContextListener in favor of MetricsServlet.ContextListener and HealthCheckServlet.ContextListener.
• Added additional constructors to HealthCheckServlet and MetricsServlet.

What is new in version 3.0.0:

• Renamed DefaultWebappMetricsFilter to InstrumentedFilter.
• Renamed MetricsContextListener to InstrumentedFilterContextListener and made it fully abstract to avoid confusion.
• Renamed MetricsServletContextListener to AdminServletContextListener and made it fully abstract to avoid confusion.
• Upgraded to Servlet API 3.1.
• Upgraded to Jackson 2.2.2.

What is new in version 3.0.0-RC1:

• Fixed XML configuration for metrics-ehcache.
• Fixed XML configuration for metrics-jersey.
• Fixed XML configuration for metrics-log4j.
• Fixed XML configuration for metrics-logback.
• Fixed a counting bug in metrics-jetty9‘s InstrumentedHandler.
• Added MetricsContextListener to metrics-servlet.
• Added MetricsServletContextListener to metrics-servlets.
• Extracted the Counting interface.
• Reverted SlidingWindowReservoir to a synchronized implementation.
• Added the implementation version to the JAR manifests.
• Made dependencies for all modules conform to Maven Enforcer's convergence rules.
• Fixed Slf4jReporter‘s logging of 99th percentiles.
• Added optional name prefixing to GraphiteReporter.
• Added metric-specific overrides of rate and duration units to JmxReporter.
• Documentation fixes.

What is new in version 2.2.0:

• Added InstrumentedSslSelectChannelConnector and InstrumentedSslSocketConnector.
• Made all metric names JMX-safe.
• Upgraded to Ehcache 2.6.2.
• Upgraded to Apache HttpClient 4.2.2.
• Upgraded to Jersey 1.15.
• Upgraded to Log4j 1.2.17.
• Upgraded to Logback 1.0.7.
• Upgraded to Spring 3.1.3.
• Upgraded to Jetty 8.1.8.
• Upgraded to SLF4J 1.7.2.

What is new in version 2.1.5:

• Upgraded to Jackson 2.1.1.

What is new in version v2.1.3:

• Changed InstrumentedClientConnManager to extend PoolingClientConnectionManager instead of the deprecated ThreadSafeClientConnManager.
• Fixed a bug in ExponentiallyDecayingSample with long periods of inactivity.
• Fixed problems with re-registering metrics in JMX.
• Added support for DnsResolver instances to InstrumentedClientConnManager.
• Added support for formatted health check error messages.

What is new in version v3.0.0-SNAPSHOT:

• Fixed a bug in ExponentiallyDecayingSample for long periods of inactivity.
• Switched all getters to the standard #getValue().
• Use the full metric name in CsvReporter.
• Made DefaultWebappMetricsFilter‘s registry configurable.
• Switched to HttpServletRequest#getContextPath() in AdminServlet.
• Upgraded to HttpClient 4.2.
• Upgraded to Logback 1.0.3.
• Upgraded to Log4j 1.2.17.
• Upgraded to JDBI 2.34.
• Upgraded to Ehcache 2.5.2.
• Upgraded to Jackson 2.0.2.
• Upgraded to Jetty 8.1.4.
• Upgraded to SLF4J 1.6.5.

What is new in version v2.1.2:

• Fixed double-registration in metrics-guice.