add custom #metrics for #spring

MetricsCollector.java

import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.Timer;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Slf4j
@Aspect
@Component
public class MetricsCollector {

    @Autowired
    private MetricRegistry metricRegistry;

    @Around("@annotation(CollectMetrics)")
    public Object collectMetrics(ProceedingJoinPoint pjp) throws Throwable {
        String typeName = pjp.getSignature().getDeclaringTypeName();
        String methodName = pjp.getSignature().getName();

        // start  timer
        Timer.Context timer = metricRegistry.timer(MetricRegistry.name(typeName, methodName)).time();
        //increment total requests meter
        metricRegistry.meter(MetricRegistry.name(typeName, methodName)).mark();

        try {
            return pjp.proceed();
        } finally {
            timer.stop();

        }
    }

    @AfterThrowing(value = "@annotation(CollectMetrics)", throwing = "e")
    public void handleException(final JoinPoint jp, final Exception e){
        String typeName = jp.getSignature().getDeclaringTypeName();
        String methodName = jp.getSignature().getName();
        metricRegistry.meter(MetricRegistry.name("error", typeName, methodName)).mark();
    }
}