Extents:https://blog.csdn.net/lr131425/article/details/77567827
问题描述，在servic事务方法中记录日志时候，在方法上加上自定义日志注解横切面，日志切面使用Around环绕通知记录日志
事务配置都是正确配置，当去除@MethodLog日志注解时候，事务是可以正常回滚的
如果加上日志注解@MethodLog事务会失效，不回滚。
自定义注解
@Target({ElementType.METHOD, ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MethodLog {
String module();
String funtion();
}
service类
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserMapper userMapper;
@MethodLog(module="用户",funtion="添加用户")
@Transactional
@Override
public void insert123(User user) throws Exception {
// TODO Auto-generated method stub
userMapper.insert(user);
throw new NullPointerException("nullpoint exception!!!!!");
}
}
切面实现类
package com.kerry.aop;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.NamedThreadLocal;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import com.kerry.model.AppLog;
import com.kerry.service.AppLogService;
/**
* 用户操作日志管理
* @author lenovo
*/
@Component
@Aspect
public class AppLogAdvice {
private Logger log=Logger.getLogger(AppLogAdvice.class);
@Autowired
private AppLogService logService;
private NamedThreadLocal startTimeThreadLocal =new NamedThreadLocal("StopWatch-StartTime");
@Pointcut("@annotation(com.kerry.aop.MethodLog)")
private void pointcut() {}
@Around("pointcut()")
public Object around(ProceedingJoinPoint point) throws Throwable {
AppLog logEntity=new AppLog();
long beginTime = System.currentTimeMillis();//1、开始时间
startTimeThreadLocal.set(beginTime);//线程绑定变量（该数据只有当前请求的线程可见）
logEntity.setId(UUID.randomUUID().toString().replace("-", ""));
ServletRequestAttributes attributes=(ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request=attributes.getRequest();
StringBuffer paramStr=new StringBuffer();
Enumeration nameList=request.getParameterNames();
while(nameList.hasMoreElements()){
String name = nameList.nextElement();
paramStr.append(name).append("=").append(request.getParameter(name)).append("&");
}
Map map = getMethodLog(point);
logEntity.setPath(request.getRequestURI());
if(paramStr.length()>0){
logEntity.setParam(paramStr.substring(0,paramStr.length()-1));
}
logEntity.setModule(map.get("module"));
logEntity.setFunction(map.get("function"));
Object object = null;
try{
object=point.proceed();
logEntity.setStatus("0");
logEntity.setRemark("成功");
return object;
}catch(Exception e){
e.printStackTrace();
logEntity.setStatus("1");
logEntity.setRemark("程序出异常");
if(e!=null){
logEntity.setException(getExceptionTrace(e));
}
}finally{
long endTime = System.currentTimeMillis();//1结束时间
long time=endTime-startTimeThreadLocal.get();
logEntity.setConsumeTime(String.valueOf(time));
log.info("Msg:开始写入日志...");
logService.addAppLog(logEntity);
log.info("Msg:日志写入结束");
}
return object;
}
/**
* 获取日志注解标注信息
* @param joinPoint
* @return
* @throws Exception
*/
public static Map getMethodLog(ProceedingJoinPoint joinPoint)
throws Exception {
Map map=new HashMap();
String targetName = joinPoint.getTarget().getClass().getName();
String methodName = joinPoint.getSignature().getName();
@SuppressWarnings("rawtypes")
Class targetClass = Class.forName(targetName);
Method[] method = targetClass.getMethods();
for (Method m : method) {
if (m.getName().equals(methodName)) {
MethodLog methodCache = m.getAnnotation(MethodLog.class);
if (methodCache != null) {
map.put("module", methodCache.module());
map.put("function", methodCache.funtion());
}
break;
}
}
return map;
}
/**
* 获取异常信息
* @param e
* @return
*/
public static String getExceptionTrace(Throwable e){
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
e.printStackTrace(pw);
pw.flush();
pw.close();
return sw.toString();
}
}
当调用userServiceImpl中事务方法 insert123(User user)时候，，方法中抛出异常按照spring事务管理会回滚事务
但是，事务方法上也注解自定义的日志注解，此时会发现 方法中insert语句成功插入数据库，而且切面中的日志也成功插入数据库，
而我们要的是 当事务方法异常时候，应该会回滚事务， 日志切面不管事务方法是否异常都要记录日志
思考：一个事务方法上有多个切面横切，会导致事务失效？？ 自定义切面影响了spring事务的切面？
解决思路： 是不是自定义切面中try catch了事务方法的exception， 删除 AppLogAdvice 的around方法的try catch 语句试试
注释掉try catch finally 语句块
@Around("pointcut()")
public Object around(ProceedingJoinPoint point) throws Throwable {
AppLog logEntity=new AppLog();
long beginTime = System.currentTimeMillis();//1、开始时间
startTimeThreadLocal.set(beginTime);//线程绑定变量（该数据只有当前请求的线程可见）
logEntity.setId(UUID.randomUUID().toString().replace("-", ""));
ServletRequestAttributes attributes=(ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request=attributes.getRequest();
StringBuffer paramStr=new StringBuffer();
Enumeration nameList=request.getParameterNames();
while(nameList.hasMoreElements()){
String name = nameList.nextElement();
paramStr.append(name).append("=").append(request.getParameter(name)).append("&");
}
Map map = getMethodLog(point);
logEntity.setPath(request.getRequestURI());
if(paramStr.length()>0){
logEntity.setParam(paramStr.substring(0,paramStr.length()-1));
}
logEntity.setModule(map.get("module"));
logEntity.setFunction(map.get("function"));
Object object = null;
// try{
object=point.proceed();
logEntity.setStatus("0");
logEntity.setRemark("成功");
// return object;
// }catch(Exception e){
// e.printStackTrace();
// logEntity.setStatus("1");
// logEntity.setRemark("程序出异常");
// if(e!=null){
// logEntity.setException(getExceptionTrace(e));
// }
// }finally{
long endTime = System.currentTimeMillis();//1结束时间
long time=endTime-startTimeThreadLocal.get();
logEntity.setConsumeTime(String.valueOf(time));
log.info("Msg:开始写入日志...");
logService.addAppLog(logEntity);
log.info("Msg:日志写入结束");
// }
return object;
}
执行结果： user，和log 数据都被回滚了？
为什么都被回滚了？ 难道是spring事务传播 导致的， 而我们logService方法并没有开启事务 为何？
@Service
public class AppLogServiceImpl implements AppLogService{
private Logger log=Logger.getLogger(AppLogServiceImpl.class);
@Autowired
private AppLogDao dao;
public void addAppLog(AppLog logEntity) {
log.info("写入日志");
dao.addAppLog(logEntity);
}
}
实验试试，在addApplog上加入不支持事务或者强制新启一个事务
@Transactional(propagation=Propagation.REQUIRES_NEW)
public void addAppLog(AppLog logEntity) {
@Transactional(propagation=Propagation.NOT_SUPPORTED)
public void addAppLog(AppLog logEntity) {
结果，user，log数据还是都会被回滚， 但是我们想要的是log日志不要被回滚。
为啥log日志也被回滚
统计下以上测试结果，， 如果around通知中，有try catch掉service 的执行方法，会发现 事务失效不会回滚， 去掉try catch 事务会回滚，但是日志记录也被回滚了
发现不对为啥日志会被回滚，也不是事务传播属性导致的，到底是啥的，，接着看了下控制台日志，发现原来当去除 try catch 块时候，切面中执行到 object=point.proceed(); 这里的时候，就会抛出异常， 这句代码下面的日志记录不会被执行的，所以日志代码那压根就没执行，所以没记录入库。
综合统计以上：去除自定义日志的try catch事务会回滚， 也就是在自定义切面的时候，不能try catch 执行的事务方法，
问题：业务中就要这么干啊，不管事务方法是否异常都要执行日志记录。
回到上面，在日志切面实现类中放开around方法中的try catch 语句块，寻找为啥事务没生效，没回滚原因。
猜想：是不是切面执行顺序问题，一个类被多个切面横切，那个先执行，那个后执行或者是交替执行？
继续测试
around环绕通知， 此时通知又try catch掉service执行代码 ，控制台记录：
2017-08-25 14:08:40.160 INFO 4068 --- [nio-8080-exec-1] com.kerry.aop.AppLogAdvice : AppLogAdvice Exception......
2017-08-25 14:08:40.161 INFO 4068 --- [nio-8080-exec-1] com.kerry.aop.AppLogAdvice : Msg:开始写入日志...
2017-08-25 14:08:40.171 INFO 4068 --- [nio-8080-exec-1] c.kerry.service.impl.AppLogServiceImpl : 写入日志
2017-08-25 14:08:40.174 INFO 4068 --- [nio-8080-exec-1] com.kerry.aop.AppLogAdvice : Msg:日志写入结束
应该执行的service内的方法后在执行切面类的 ，所以顺序是先执行的事务切面，再是自定义日志切面
此时我们手动改变下顺序， 使用@order注解日志切面
@Component
@Aspect
@Order(0)
public class AppLogAdvice {
测试日志
2017-08-25 14:17:04.595 INFO 4068 --- [nio-8080-exec-1] com.kerry.aop.AppLogAdvice : AppLogAdvice Exception......
2017-08-25 14:17:04.596 INFO 4068 --- [nio-8080-exec-1] com.kerry.aop.AppLogAdvice : Msg:开始写入日志...
2017-08-25 14:17:04.604 INFO 4068 --- [nio-8080-exec-1] c.kerry.service.impl.AppLogServiceImpl : 写入日志
2017-08-25 14:17:04.606 INFO 4068 --- [nio-8080-exec-1] com.kerry.aop.AppLogAdvice : Msg:日志写入结束
null
org.springframework.transaction.UnexpectedRollbackException: Transaction rolled back because it has been marked as rollback-only
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:724)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:487)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy235.insert123(Unknown Source)
at com.kerry.web.UserController.save(UserController.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Transaction rolled back because it has been marked as rollback-only
2017-08-25 14:17:04.694 WARN 4068 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolved exception caused by Handler execution: org.springframework.transaction.UnexpectedRollbackException: Transaction rolled back because it has been marked as rollback-only
通过以上日志我们发现先执行的日志切面，再执行的service方法。
查看数据库发现 user 和 log 都被回滚了，日志显示事务会回滚了， 但是为毛把log也回滚了？ 事务传播搞的鬼？
为了验证猜想，那就继续更改spring事务传播属性，更改日志记录的service方法
@Transactional(propagation=Propagation.NOT_SUPPORTED)
public void addAppLog(AppLog logEntity) {
log.info("写入日志");
dao.addAppLog(logEntity);
}
设置为不支持事务
测试结果 通过， user插入失败，日志插入成功 ，
接着测试，写入日志不使用上面的service ，新起一个thread类，插入日志
public class LogThread extends Thread {
private AppLogService logService;
private AppLog log;
public LogThread(AppLogService logService,AppLog log) {
this.logService = logService;
this.log = log;
}
@Override
public void run() {
logService.addAppLog(log);
}
切面类插入日志更改成新启线程插入，同时去除logService.addAppLog方法上设置的事务
}finally{
long endTime = System.currentTimeMillis();//1结束时间
long time=endTime-startTimeThreadLocal.get();
logEntity.setConsumeTime(String.valueOf(time));
log.info("Msg:开始写入日志...");
// logService.addAppLog(logEntity);
new LogThread(logService, logEntity).start();
log.info("Msg:日志写入结束");
}
测试结果发现， user插入失败， log插入成功 符合预期结果
此时可以确定应该是事务传播引起的导致user，和log都回滚了。 当分来开不同事务线程 就可以得到正确答案。
综上所述： 在使用事务切面的方法上使用自定义切面 并且使用around环绕通知时候， 当try catch掉被执行事务方法时候，事务会失效，
解决方法
方法1 ： 不要try catch 被执行事务方法
方法2 ： springmvc 中使用try catch，但是设置自定义切面执行顺序更 高优先级
如： spring mvc中 被切面类
@Component
@Aspect
@Order(0)
public class AppLogAdvice {
注解事务设置 order（2）
方法3 springboot中，使用try catch 的 around方法时候 ，除了要设置自定义切面的优选顺序高还得设置 日志插入的方法不支持事务或者自己强制新启一个事务
@Component
@Aspect
@Order(0)
public class AppLogAdvice {
//@Transactional(propagation=Propagation.NOT_SUPPORTED)
@Transactional(propagation=Propagation.REQUIRES_NEW)
public void addAppLog(AppLog logEntity) {
log.info("写入日志");
dao.addAppLog(logEntity);
}
或者 使用新建Thread类处理插入日志
log.info("Msg:开始写入日志...");
// logService.addAppLog(logEntity);
new LogThread(logService, logEntity).start();
log.info("Msg:日志写入结束");