package com.codahale.metrics.servlet;
import com.codahale.metrics.MetricRegistry;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
A listener implementation which injects a MetricRegistry
instance into the servlet context. Implement getMetricRegistry()
to return the MetricRegistry
for your application. /**
* A listener implementation which injects a {@link MetricRegistry} instance into the servlet
* context. Implement {@link #getMetricRegistry()} to return the {@link MetricRegistry} for your
* application.
*/
public abstract class InstrumentedFilterContextListener implements ServletContextListener {
Returns: the MetricRegistry
to inject into the servlet context.
/**
* @return the {@link MetricRegistry} to inject into the servlet context.
*/
protected abstract MetricRegistry getMetricRegistry();
@Override
public void contextInitialized(ServletContextEvent sce) {
sce.getServletContext().setAttribute(InstrumentedFilter.REGISTRY_ATTRIBUTE, getMetricRegistry());
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
}
}