org.aspectj.lang.annotation.Before Java Examples

@Before("paramValidAspect()")
public void before(JoinPoint joinPoint) {
	// 获取入参
	Object[] args = joinPoint.getArgs();
	for (Object arg : args) {
		if (arg == null) {
			throw new ParamValidException(BizError.参数异常.getCode(), "入参为空");
		}
		Set<ConstraintViolation<Object>> violations = validator.validate(arg);
		Iterator<ConstraintViolation<Object>> iterator = violations.iterator();
		// 参数校验不通过,直接抛出异常
		if (iterator.hasNext()) {
			ConstraintViolation<Object> violation = iterator.next();
			throw new ParamValidException(BizError.参数异常.getCode(),
					violation.getPropertyPath() + ":" + violation.getMessage());
		}
	}

}
 

@Before("   execution(* com.cms.scaffold.micro.*.dao.*.insert*(..)) " +
        "|| execution( * com.cms.scaffold.common.base.BaseMapper.insert*(..))")
public void insert(JoinPoint joinPoint){

    BaseEntity baseEntity = null;
    try {
        //获取目标方法的参数信息
        Object[] obj = joinPoint.getArgs();
        if(obj!=null && obj.length > 0 && obj[0] instanceof BaseEntity){
            baseEntity = (BaseEntity)obj[0];
            if (baseEntity.getAddTime() == null){
                baseEntity.preInsert();
            }
        }
    }catch (Exception ex){
        logger.info(ex.getMessage(),ex);
    }

}
 

/**
 * <方法执行前>
 *
 * @param point  [参数说明]
 * @param sysLog sysLog
 * @return void [返回类型说明]
 * @see [类、类#方法、类#成员]
 */
@Before(value = "log()")
public void before(JoinPoint point) throws Throwable {
    ApiLogger apiLogger = new ApiLogger();
    //将当前实体保存到threadLocal
    log.info("日志开始记录");
    logThreadLocal.set(apiLogger);
    RequestAttributes ra = RequestContextHolder.getRequestAttributes();
    ServletRequestAttributes sra = (ServletRequestAttributes) ra;
    HttpServletRequest request = sra.getRequest();
    String operation = request.getMethod();
    apiLogger.setId(UuidUtil.getUuid());
    apiLogger.setCreateTime(LocalDateTime.now());
    if (!request.getRequestURI().contains(GlobalsConstants.LOGIN)) {
        apiLogger.setUserName(getUsername());
        apiLogger.setParams(Arrays.toString(point.getArgs()));
    }
    apiLogger.setMethodName(getMethodDescription(point) + ":" + point.getSignature().getName());
    apiLogger.setClassName(point.getTarget().getClass().getName());
    apiLogger.setMethod(operation);
    apiLogger.setUri(URLUtil.getPath(request.getRequestURI()));
    apiLogger.setIp(getIpAddr(request));
    apiLogger.setServiceId(getClientId());
    log.info("结束日志记录");
}
 

@Before("pointcut()")
public void doVerifyBefore(JoinPoint joinPoint) {
	// 1. 登录校验
	MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
	String uri = request.getRequestURI();
       Long user_id = null;
	if (!uri.startsWith("/open") && !uri.equals("/")) {
		user_id = user.getUserId();
	}
	
	// 2. 开发环境-打印日志
	String ip = request.getRemoteHost();
       log.info("ip={}", ip);
	log.info("uri={}", uri);
	log.info("user_id={}", user_id);
	log.info("method={}", request.getMethod());
	log.info("class_method={}", methodSignature.getDeclaringTypeName() + "." + methodSignature.getName() + "()");
}
 

@Before("chatRecordPointcut()")
public void doBefore(JoinPoint joinPoint) {
    log.debug("before -> {}", joinPoint);

    MessageVO messageVO = null;
    Object[] args = joinPoint.getArgs();
    for (Object obj : args) {
        if (obj instanceof MessageVO) {
            messageVO = (MessageVO) obj;
            break;
        }
    }

    Assert.notNull(messageVO, "方法必需以MessageVO类或该类的子类作为参数");

    if (messageVO.getType() == MessageTypeEnum.USER) {
        // 对于User类型的消息做敏感词处理
        messageVO.setMessage(SensitiveWordUtils.loveChina(messageVO.getMessage()));
    }

    log.debug("添加聊天记录 -> {}", messageVO);
    chatRecordService.addRecord(ChatRecordDTO.toChatRecordDTO(messageVO));
}
 

@Before("logPointCut()")
public void before(JoinPoint joinPoint) {
	MethodSignature signature = (MethodSignature) joinPoint.getSignature();
	Method method = signature.getMethod();
	// 如果是退出登录请求。侧使用前置通知
	if ("logout".equals(method.getName())) {
		// 保存日志
		saveActionLog(joinPoint, 0, false);
	}
}
 

@Before(value="execution(void set*(*)) && this(mixin)", argNames="mixin")
public void checkNotLocked( Lockable mixin) {
	// Can also obtain the mixin (this) this way
	//Lockable mixin = (Lockable) jp.getThis();
	if (mixin.locked()) {
		throw new IllegalStateException();
	}
}
 

@SuppressWarnings("unchecked")
@org.junit.Before
public void setup() {
	ClassPathXmlApplicationContext ctx =
			new ClassPathXmlApplicationContext(getClass().getSimpleName() + "-context.xml", getClass());

	counterAspect = (CounterAspect) ctx.getBean("counterAspect");
	counterAspect.reset();

	testBean = (GenericInterface<String>) ctx.getBean("testBean");
}
 

/**
 * 选择数据源 DataSource
 *
 * @param point the point
 */
@Before("daoAspect()")
public void switchDataSource(JoinPoint point) {
    if (openSaasProperties.getTenantId() != null) {
        DynamicDataSourceContextHolder.setDataSourceKey(openSaasProperties.getTenantId());
        logger.info("==> Switch DataSource to [{}] in Method [{}] tenant is [{}]", DynamicDataSourceContextHolder.getDataSourceKey(), point.getSignature(),openSaasProperties.getTenantId());
    }else{
        DynamicDataSourceContextHolder.setDataSourceKey("master");
    }
}
 

/**
 * 前置通知 (在方法执行之前返回)用于拦截Controller层记录用户的操作的开始时间
 *
 * @param joinPoint 切点
 * @throws InterruptedException
 */
@Before("controllerAspect()")
public void doBefore(JoinPoint joinPoint) throws InterruptedException {

    //线程绑定变量（该数据只有当前请求的线程可见）
    Date beginTime = new Date();
    beginTimeThreadLocal.set(beginTime);
}
 

@Before("pointcut()")
public void before(JoinPoint joinPoint) {
    // 用户[1.2.3.4],在[xxx],访问了[com.nowcoder.community.service.xxx()].
    ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    if (attributes == null) {
        return;
    }
    HttpServletRequest request = attributes.getRequest();
    String ip = request.getRemoteHost();
    String now = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
    String target = joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName();
    logger.info(String.format("用户[%s],在[%s],访问了[%s].", ip, now, target));
}
 

/******advice********/

    //@After("matchAnno()") //方法执行完成之后(不论是否有异常)
    //@After("matchException()") //方法执行完成之后(不论是否有异常)
    //@AfterThrowing("matchException()") //抛出异常之后执行
    //@AfterThrowing("matchAnno()") //不抛异常不执行
    //public void after(){
    //    System.out.println("###after");
    //}

    //@AfterReturning(value ="matchReturn()",returning = "result") // 获取方法的返回值
    //public void after(Object result){
    //    System.out.println("###after returning:"+result);
    //}

    //@Around("matchAnno()") //测试@Around正常情况
    //@Around("matchException()")// 测试@Around出现异常
    //public Object after(ProceedingJoinPoint pjp) {
    //    System.out.println("###before");
    //    Object result = null;
    //    try {
    //        result = pjp.proceed(pjp.getArgs());
    //        System.out.println("###after returning:" + result);
    //    } catch (Throwable e) {
    //        System.out.println("###catch ex");
    //        //throw
    //        e.printStackTrace();
    //    } finally {
    //        System.out.println("###finally");
    //    }
    //    return result;
    //}

    // 使用@Before校验参数
    @Before("matchLongArg() && args(productId)")
    public void before(Long productId){
        System.out.println("###before,get args:"+productId);
    }
 

@Before(value="execution(void set*(*)) && this(mixin)", argNames="mixin")
public void checkNotLocked( Lockable mixin) {
	// Can also obtain the mixin (this) this way
	//Lockable mixin = (Lockable) jp.getThis();
	if (mixin.locked()) {
		throw new IllegalStateException();
	}
}
 

@Before("execution(* com.github.tangyi.auth.security.CustomUserDetailsServiceImpl.load*(..)) && args(tenantCode,..)")
public void validateTenantCode(String tenantCode) throws TenantNotFoundException {
	// 获取tenantCode
	if (StringUtils.isBlank(tenantCode))
		throw new TenantNotFoundException("tenantCode cant not be null");
	// 先获取租户信息
	ResponseBean<Tenant> tenantResponseBean = userServiceClient.findTenantByTenantCode(tenantCode);
	if (!ResponseUtil.isSuccess(tenantResponseBean))
		throw new ServiceException("get tenant info failed: " + tenantResponseBean.getMsg());
	Tenant tenant = tenantResponseBean.getData();
	if (tenant == null)
		throw new TenantNotFoundException("tenant does not exist");
}
 

@Before(value = "@annotation(annotation) && args(companyId, customerID, custParameters)", argNames = "annotation,companyId,customerID,custParameters")
public void validate(Validate annotation, int companyId, int customerID, Map<?, ?> custParameters) throws ValidatorException {
   	if(log.isDebugEnabled()) {
   		log.debug("formName:"+annotation.value());
   	}

       Validator validator = new Validator(resources, annotation.value());
       validator.setParameter(Validator.BEAN_PARAM, custParameters);
       validateInternal(validator);

}
 

@org.junit.Before
public void setup() {
	ClassPathXmlApplicationContext ctx =
			new ClassPathXmlApplicationContext(getClass().getSimpleName() + ".xml", getClass());

	counterAspect = (CounterAspect) ctx.getBean("counterAspect");
	testBean1 = (ITestBean) ctx.getBean("testBean1");
	testBean3 = (ITestBean) ctx.getBean("testBean3");
}
 

@Before(value = "@annotation(annotation) && args(companyId, modelId)")
public void validate(Validate annotation, int companyId, int modelId) throws ValidatorException {
	if(log.isDebugEnabled()) {
		log.debug("formName: " + annotation.value() + ", companyId: " + companyId);
	}

	Validator validator = new Validator(resources, annotation.value());
	validator.setParameter(Validator.BEAN_PARAM, companyId);
	validator.setParameter(Validator.BEAN_PARAM, modelId);

	validateInternal(validator);
}
 

@SuppressWarnings("unchecked")
@org.junit.Before
public void setup() {
	ClassPathXmlApplicationContext ctx =
			new ClassPathXmlApplicationContext(getClass().getSimpleName() + "-context.xml", getClass());

	counterAspect = (GenericCounterAspect) ctx.getBean("counterAspect");
	counterAspect.count = 0;

	testBean = (DerivedInterface<String>) ctx.getBean("testBean");
}
 

@Before(value = "@annotation(annotation) && args(model, username, companyId, ..)")
public void validate(Validate annotation, Object model, String username, int companyId) throws ValidatorException {
   	if(log.isDebugEnabled()) {
   		log.debug("formName:"+annotation.value()+", model:"+model.getClass().getName() + ", username: " + username);
   	}

   	validateInternal(annotation, model);
}
 

@SuppressWarnings("unchecked")
@org.junit.Before
public void setup() {
	ClassPathXmlApplicationContext ctx =
			new ClassPathXmlApplicationContext(getClass().getSimpleName() + "-context.xml", getClass());

	counterAspect = (CounterAspect) ctx.getBean("counterAspect");
	counterAspect.reset();

	testBean = (GenericInterface<String>) ctx.getBean("testBean");
}
 

@Before(value="execution(void set*(*)) && this(modifiable) && args(newValue)", argNames="modifiable,newValue")
public void recordModificationIfSetterArgumentDiffersFromOldValue(
		JoinPoint jp, MutableModifiable mixin, Object newValue) {

	/*
	 * We use the mixin to check and, if necessary, change,
	 * modification status. We need the JoinPoint to get the
	 * setter method. We use newValue for comparison.
	 * We try to invoke the getter if possible.
	 */

	if (mixin.isModified()) {
		// Already changed, don't need to change again
		//System.out.println("changed");
		return;
	}

	// Find the current raw value, by invoking the corresponding setter
	Method correspondingGetter = getGetterFromSetter(((MethodSignature) jp.getSignature()).getMethod());
	boolean modified = true;
	if (correspondingGetter != null) {
		try {
			Object oldValue = correspondingGetter.invoke(jp.getTarget());
			//System.out.println("Old value=" + oldValue + "; new=" + newValue);
			modified = !ObjectUtils.nullSafeEquals(oldValue, newValue);
		}
		catch (Exception ex) {
			ex.printStackTrace();
			// Don't sweat on exceptions; assume value was modified
		}
	}
	else {
		//System.out.println("cannot get getter for " + jp);
	}
	if (modified) {
		mixin.markDirty();
	}
}
 

@Before(value = "@annotation(annotation) && args(model, ..)")
   public void validate(Validate annotation, Object model) throws ValidatorException {
   	if(log.isDebugEnabled()) {
   		log.debug("formName:"+annotation.value()+", model:"+model.getClass().getName());
   	}

   	validateInternal(annotation, model);
}
 

@org.junit.Before
public void setup() {
	ClassPathXmlApplicationContext ctx =
			new ClassPathXmlApplicationContext(getClass().getSimpleName() + ".xml", getClass());
	testBean = (TestInterface) ctx.getBean("testBean");
	testAnnotatedClassBean = (TestInterface) ctx.getBean("testAnnotatedClassBean");
	testAnnotatedMethodBean = (TestInterface) ctx.getBean("testAnnotatedMethodBean");
	counter = (Counter) ctx.getBean("counter");
	counter.reset();
}
 

@Before("within(com.hua..*) && @annotation(loggerManage)")
//切入点
public void addBeforeLogger(JoinPoint joinPoint, LoggerManage loggerManage) {
	logger.info("执行 " + loggerManage.description() + " 开始");
	logger.info(joinPoint.getSignature().toString());
	logger.info(parseParames(joinPoint.getArgs()));
}
 

@Before("execution(* org.springframework.tests.sample.beans.TestBean.absquatulate(..)) && target(testBean)")
public void touchBean(TestBean testBean) {
	testBean.setName("advisedName");
}
 

@Before("execution(void *.set*(int))")
public void countSetter() {
	++count;
}
 

@Before("execution(* getAge())")
public void throwException() throws Exception {
	throw ex;
}
 

@Before("execution(* org.springframework.tests.sample.beans.ITestBean.setAge(int)) && args(newAge)")
public void countSet(int newAge) throws Exception {
	++totalCalls;
}
 

@Before("updatePay()")
public void doBefore(JoinPoint joinPoint) throws Throwable {
    log.info("❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤");
    check(joinPoint);
}
 

@Before("matchAnno()")
public void before() {
    System.out.println("");
    System.out.println("##before method");
}