Java Profiler

Profiler.java

/*
 * Copyright (C) 2018 Be ID Corporation Co., Ltd. <https://www.beid.io>
 */

package handlers;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * <p>
 * There is no support for runtime annotation in Scala, so far
 * Java interfaces need to be used.
 * <p>
 * @author Peerapat A on Mar 18, 2017
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Profiler {
}

ProfilerInterceptor.java

/*
 * Copyright (C) 2018 Be ID Corporation Co., Ltd. <https://www.beid.io>
 */

package handlers

import java.util.concurrent.TimeUnit

import com.google.common.base.Stopwatch
import com.typesafe.scalalogging.LazyLogging
import org.aopalliance.intercept.{MethodInterceptor, MethodInvocation}

/**
  * @author Peerapat A on Mar 18, 2017
  */
private class ProfilerInterceptor extends MethodInterceptor
  with LazyLogging {

  override def invoke(invocation: MethodInvocation): AnyRef = {
    val watch = Stopwatch.createStarted()
    val className = invocation.getMethod.getDeclaringClass.getSimpleName
    val methodName = invocation.getMethod.getName

    try {
      invocation.proceed()
    } finally {
      val elapsed = watch.stop.elapsed(TimeUnit.MILLISECONDS)
      logger.info(s"$className.$methodName, execute in $elapsed ms.")
    }
  }

}