LoggingMetricsConfigurator.java

package org.mapfish.print.metrics;

import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.logback.InstrumentedAppender;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;

import javax.annotation.PostConstruct;

/**
 * Utility class for adding metrics instrumentation to logging framework.
 */
public class LoggingMetricsConfigurator {
    @Autowired
    private MetricRegistry metricRegistry;

    /**
     * Add an appender to Logback logging framework that will track the types of log messages made.
     */
    @PostConstruct
    public final void addMetricsAppenderToLogback() {
        final LoggerContext factory = (LoggerContext) LoggerFactory.getILoggerFactory();
        final Logger root = factory.getLogger(Logger.ROOT_LOGGER_NAME);

        final InstrumentedAppender metrics = new InstrumentedAppender(this.metricRegistry);
        metrics.setContext(root.getLoggerContext());
        metrics.start();
        root.addAppender(metrics);
    }
}