Spring monitor

最新推荐文章于 2024-08-15 08:15:00 发布

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本文介绍了一个基于Spring AOP的监控系统实现，通过定义`@ExecuteMonitor`注解并结合自定义切面类`ExecuteInterceptor`，可以在方法执行前后记录日志，并在超过预设时间阈值时进行特殊处理。

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@Target({java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ExecuteMonitor
{
  public abstract long timeout();
}


import org.springframework.aop.Pointcut;
import org.springframework.aop.support.ComposablePointcut;
import org.springframework.aop.support.annotation.AnnotationMatchingPointcut;
import org.springframework.beans.factory.FactoryBean;

public class ExecutePointcut
  implements FactoryBean<Pointcut>
{
  public Pointcut getObject()
    throws Exception
  {
    ComposablePointcut cp = new ComposablePointcut(
      AnnotationMatchingPointcut.forClassAnnotation(ExecuteMonitor.class));

    cp.union(
      AnnotationMatchingPointcut.forMethodAnnotation(ExecuteMonitor.class));
    return cp;
  }

  public Class<?> getObjectType() {
    return Pointcut.class;
  }

  public boolean isSingleton() {
    return true;
  }
}

import java.lang.reflect.Method;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.lang.SystemUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.aop.support.DelegatingIntroductionInterceptor;

public class ExecuteInterceptor extends DelegatingIntroductionInterceptor
{
  private static Logger logger = LoggerFactory.getLogger(ExecuteInterceptor.class);

  private long getTimeout(Method m)
  {
    ExecuteMonitor em = (ExecuteMonitor)m.getAnnotation(ExecuteMonitor.class);
    if (em == null)
    {
      em = (ExecuteMonitor)m.getDeclaringClass().getAnnotation(ExecuteMonitor.class);
    }

    if (em == null) {
      return -1L;
    }
    return em.timeout();
  }

  private void printArguments(StringBuilder sb, Object[] args)
  {
    int i = 0;
    sb.append("{");
    for (Object arg : args) {
      sb.append(i++).append("->");
      sb.append(String.valueOf(arg));
      sb.append(SystemUtils.LINE_SEPARATOR);
    }
    sb.append("}");
  }

  public Object invoke(MethodInvocation mi)
    throws Throwable
  {
    logger.debug("invoke..." + mi.toString());

    long timeout = getTimeout(mi.getMethod());
    long l = 0L;

    if (timeout > 0L)
      l = System.currentTimeMillis();
    try
    {
      long timeused;
      StringBuilder sb;
      return super.invoke(mi);
    }
    finally {
      if (l > 0L) {
        long timeused = System.currentTimeMillis() - l;

        if (timeused >= timeout) {
          StringBuilder sb = new StringBuilder("");
          sb.append(mi.getMethod().toString());
          sb.append(" executed in ").append(timeused)
            .append("ms (> ").append(timeout).append(
            "ms), Arguments :");
          printArguments(sb, mi.getArguments());
          logger.info(sb.toString());
          sb = null;
        }
      }
    }
  }
}



       <bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator">
		<property name="proxyTargetClass" value="true"></property>
		<property name="advisorBeanNamePrefix" value="autoproxy"></property>
	</bean>
	<bean id="executeInterceptor" class="com.xxxxx.core.monitor.ExecuteInterceptor" />

	<bean id="executePointcut" class="com.xxxxx.core.monitor.ExecutePointcut" />

	<bean id="autoproxy.execute" class="org.springframework.aop.support.DefaultPointcutAdvisor">
		<property name="pointcut" ref="executePointcut" />
		<property name="advice" ref="executeInterceptor" />
	</bean>