分析java 中AspectJ切面执行两次的原因

package com.rhwayfun.aspect;

import java.lang.annotation.*;

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.CLASS)
@Documented
public @interface StatsService {
}

package com.rhwayfun.aspect;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Aspect
public class StatsServiceInterceptor {

  private static Logger log = LoggerFactory.getLogger(StatsServiceInterceptor.class);

  @Around("@annotation(StatsService)")
  public Object invoke(ProceedingJoinPoint pjp) {
    try {
      log.info("before invoke target.");
      return pjp.proceed();
    } catch (Throwable e) {
      log.error("invoke occurs error:", e);
      return null;
    } finally {
      log.info("after invoke target.");
    }
  }

}

package com.rhwayfun;

import com.rhwayfun.aspect.StatsService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.time.LocalDateTime;

public class AspectTest {

  private static Logger log = LoggerFactory.getLogger(AspectTest.class);

  public static void main(String[] args) {
    AspectTest.print();
  }

  @StatsService
  public static void print(){
    log.info("Now: {}", LocalDateTime.now());
  }
}

public class AspectTest
{
  private static Logger log;
  private static final /* synthetic */ JoinPoint$StaticPart ajc$tjp_0;
  private static final /* synthetic */ JoinPoint$StaticPart ajc$tjp_1;

  public static void main(final String[] args) {
    StatsServiceInterceptor.aspectOf().invoke(((AroundClosure)new AspectTest$AjcClosure1(new Object[] { Factory.makeJP(AspectTest.ajc$tjp_0, (Object)null, (Object)null) })).linkClosureAndJoinPoint(0));
  }

  @StatsService
  public static void print() {
    StatsServiceInterceptor.aspectOf().invoke(((AroundClosure)new AspectTest$AjcClosure3(new Object[] { Factory.makeJP(AspectTest.ajc$tjp_1, (Object)null, (Object)null) })).linkClosureAndJoinPoint(65536));
  }

  static {
    ajc$preClinit();
    AspectTest.log = LoggerFactory.getLogger((Class)AspectTest.class);
  }

  private static /* synthetic */ void ajc$preClinit() {
    final Factory factory = new Factory("AspectTest.java", (Class)AspectTest.class);
    ajc$tjp_0 = factory.makeSJP("method-call", (Signature)factory.makeMethodSig("9", "print", "com.rhwayfun.AspectTest", "", "", "", "void"), 17);
    ajc$tjp_1 = factory.makeSJP("method-execution", (Signature)factory.makeMethodSig("9", "print", "com.rhwayfun.AspectTest", "", "", "", "void"), 22);
  }
}

method-call和method-execution都是连接点ProceedingJoinPoint的kind属性