<dependencies> 
    <dependency> 
        <groupId>com.codahale.metrics</groupId> 
        <artifactId>metrics-core</artifactId> 
        <version>${metrics.version}</version> 
    </dependency> 
</dependencies>

final MetricRegistry metrics = new MetricRegistry();

public class QueueManager { 
    private final Queue queue; 
    public QueueManager(MetricRegistry metrics, String name) { 
        this.queue = new Queue();
        metrics.register(MetricRegistry.name(QueueManager.class, name, "size"), 
            new Gauge<Integer>() { 
                @Override 
                public Integer getValue() { 
                    return queue.size(); 
                } 
            }
        ); 
    } 
}

MetricRegistry.name(QueueManager.class, "jobs", "size")

public class CacheHitRatio extends RatioGauge { 
    private final Meter hits; 
    private final Timer calls; 
    public CacheHitRatio(Meter hits, Timer calls) { 
        this.hits = hits; this.calls = calls; 
    } 
    @Override 
    public Ratio getValue() { 
        return Ratio.of(hits.oneMinuteRate(), calls.oneMinuteRate()); 
    } 
}

private final Counter pendingJobs 
    = metrics.counter(name(QueueManager.class, "pending-jobs"));
public void addJob(Job job) { 
    pendingJobs.inc(); 
    queue.offer(job); 
} 
public Job takeJob() { 
    pendingJobs.dec(); 
    return queue.take(); 
}

private final Histogram responseSizes 
    = metrics.histogram(name(RequestHandler.class, "response-sizes"); 
public void handleRequest(Request request, Response response) { 
    // etc 
    responseSizes.update(response.getContent().length); 
}

private final Timer responses = metrics.timer(name(RequestHandler.class, "responses")); 
public String handleRequest(Request request, Response response) { 
    final Timer.Context context = responses.time(); 
    try { 
        // etc; 
        return "OK"; 
    } finally { 
        context.stop(); 
    } 
}

final HealthCheckRegistry healthChecks = new HealthCheckRegistry();

public class DatabaseHealthCheck extends HealthCheck { 
    private final Database database; 
    public DatabaseHealthCheck(Database database) { 
        this.database = database; 
    } 
    @Override 
    public HealthCheck.Result check() throws Exception { 
        if (database.isConnected()) { 
            return HealthCheck.Result.healthy(); 
        } else { 
            return HealthCheck.Result.unhealthy("Cannot connect to " +    
                database.getUrl()); 
        } 
    } 
}

healthChecks.register("mysql", new DatabaseHealthCheck(database));

final Map<String, HealthCheck.Result> results = healthChecks.runHealthChecks(); 
for (Entry<String, HealthCheck.Result> entry : results.entrySet()) { 
    if (entry.getValue().isHealthy()) { 
        System.out.println(entry.getKey() + " is healthy"); 
    } else { 
        System.err.println(entry.getKey() + " is UNHEALTHY: " +     
            entry.getValue().getMessage()); 
        final Throwable e = entry.getValue().getError(); 
        if (e != null) { 
            e.printStackTrace(); 
        } 
    } 
}

final JmxReporter reporter = JmxReporter.forRegistry(registry).build(); 
reporter.start();

<dependency> 
    <groupId>com.codahale.metrics</groupId> 
    <artifactId>metrics-servlets</artifactId> 
    <version>${metrics.version}</version> 
</dependency>

final ConsoleReporter reporter = ConsoleReporter.forRegistry(registry) 
                                    .convertRatesTo(TimeUnit.SECONDS) 
                                    .convertDurationsTo(TimeUnit.MILLISECONDS) 
                                    .build(); 
 
reporter.start(1, TimeUnit.MINUTES);

final CsvReporter reporter = CsvReporter.forRegistry(registry) 
                                .formatFor(Locale.US) 
                                .convertRatesTo(TimeUnit.SECONDS) 
                                .convertDurationsTo(TimeUnit.MILLISECONDS) 
                                .build(new File("~/projects/data/")); 
reporter.start(1, TimeUnit.SECONDS);

final Slf4jReporter reporter = Slf4jReporter.forRegistry(registry)             
                               .outputTo(LoggerFactory.getLogger("com.example.metrics"))     
                                .convertRatesTo(TimeUnit.SECONDS) 
                                .convertDurationsTo(TimeUnit.MILLISECONDS) 
                                .build(); 
reporter.start(1, TimeUnit.MINUTES);

final GMetric ganglia = new GMetric("ganglia.example.com", 8649, UDPAddressingMode.MULTICAST, 1); 
final GangliaReporter reporter = GangliaReporter.forRegistry(registry)         
                                    .convertRatesTo(TimeUnit.SECONDS) 
                                    .convertDurationsTo(TimeUnit.MILLISECONDS) 
                                    .build(ganglia); 
reporter.start(1, TimeUnit.MINUTES);

final Graphite graphite = new Graphite(new InetSocketAddress("graphite.example.com", 2003)); 
final GraphiteReporter reporter = GraphiteReporter.forRegistry(registry) 
                                    .prefixedWith("web1.example.com") 
                                    .convertRatesTo(TimeUnit.SECONDS)         
                                    .convertDurationsTo(TimeUnit.MILLISECONDS) 
                                    .filter(MetricFilter.ALL) 
                                    .build(graphite); 
reporter.start(1, TimeUnit.MINUTES);

<dependency> 
    <groupId>com.ryantenney.metrics</groupId> 
    <artifactId>metrics-spring</artifactId> 
    <version>3.0.1</version> 
</dependency>

<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:metrics="http://www.ryantenney.com/schema/metrics" 
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans         
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd             
        http://www.ryantenney.com/schema/metrics http://www.ryantenney.com/schema/metrics/metrics-3.0.xsd"> 
    <!-- Registry should be defined in only one context XML file --> 
    <metrics:metric-registry id="metrics" /> 
    <!-- annotation-driven must be included in all context files --> 
    <metrics:annotation-driven metric-registry="metrics" /> 
    <!-- (Optional) Registry should be defined in only one context XML file -->
    <metrics:reporter type="console" metric-registry="metrics" period="1m" /> 
    <!-- (Optional) The metrics in this example require the metrics-jvm jar-->
    <metrics:register metric-registry="metrics"> 
        <bean metrics:name="jvm.gc" class="com.codahale.metrics.jvm.GarbageCollectorMetricSet" />
        <bean metrics:name="jvm.memory" class="com.codahale.metrics.jvm.MemoryUsageGaugeSet" /> 
        <bean metrics:name="jvm.thread-states" class="com.codahale.metrics.jvm.ThreadStatesGaugeSet" /> 
        <bean metrics:name="jvm.fd.usage" class="com.codahale.metrics.jvm.FileDescriptorRatioGauge" /> 
    </metrics:register> 
    <!-- Beans and other Spring config --> 
</beans>

import java.util.concurrent.TimeUnit; 
import org.springframework.context.annotation.Configuration; 
import com.codahale.metrics.ConsoleReporter; 
import com.codahale.metrics.MetricRegistry; 
import com.codahale.metrics.SharedMetricRegistries; 
import com.ryantenney.metrics.spring.config.annotation.EnableMetrics; 
import com.ryantenney.metrics.spring.config.annotation.MetricsConfigurerAdapter; 
 
@Configuration 
@EnableMetrics 
public class SpringConfiguringClass extends MetricsConfigurerAdapter { 
    @Override 
    public void configureReporters(MetricRegistry metricRegistry) { 
    ConsoleReporter.forRegistry(metricRegistry).build().start(1, TimeUnit.MINUTES); 
    } 
}