背景
-
切面介绍
-
切面的使用【基于注解】
-
写一个请求日志切面
-
高并发下请求日志切面
背景：
平时开发中，日志是必不可少的，在接口的开始和结束分别打印入参和出参，能帮我们快速定位出现的问题；
今天用切面，来记录每次接口调用时，接口的入参和出参；
切面介绍
面向切面编程是一种编程范式，它作为 OOP 面向对象编程的一种补充，用于处理系统中分布于各个模块的横切关注点，比如事务管理、权限控制、缓存控制、日志打印等等。
AOP 把软件的功能模块分为两个部分：
- 核心关注点
- 横切关注点
业务处理的主要功能为核心关注点，而非核心、需要拓展的功能为横切关注点。AOP 的作用在于分离系统中的各种关注点，将核心关注点和横切关注点进行分离。
使用切面有以下好处：
- 集中处理某一关注点/横切逻辑
- 可以很方便的添加/删除关注点
- 侵入性少，增强代码可读性及可维护性
因此当想打印请求日志时很容易想到切面，对控制层代码 0 侵入。
切面的使用【基于注解】
- @Aspect => 声明该类为一个注解类
切点注解：
- @Pointcut => 定义一个切点，可以简化代码
通知注解：
- @Before => 在切点之前执行代码
- @After => 在切点之后执行代码
- @AfterReturning => 切点返回内容后执行代码，可以对切点的返回值进行封装
- @AfterThrowing => 切点抛出异常后执行
- @Around => 环绕，在切点前后执行代码
引入依赖：
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>1.9.7</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.3.20</version>
</dependency>写一个请求日志切面
使用 @Pointcut 定义切点：
@Pointcut("execution(* package_path.controller..*(..))")
public void requestServer() {}@Pointcut 定义了一个切点，因为是请求日志切边，因此切点定义的是 Controller 包下的所有类下的方法。定义切点以后在通知注解中直接使用 requestServer 方法名就可以了。
使用 @Before 再切点前执行：
@Before("requestServer()")
public void doBefore(JoinPoint joinPoint) {
ServletRequestAttributes attributes = (ServletRequestAttributes)
RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
LOGGER.info("===============================Start========================");
LOGGER.info("IP : {}", request.getRemoteAddr());
LOGGER.info("URL : {}", request.getRequestURL().toString());
LOGGER.info("HTTP Method : {}", request.getMethod());
LOGGER.info("Class Method : {}.{}", joinPoint.getSignature().getDeclaringTypeName(), joinPoint.getSignature().getName());
}在进入 Controller 方法前，打印出调用方 IP、请求 URL、HTTP 请求类型、调用的方法名。
使用 @Around 打印进入控制层的入参：
打印了入参、结果以及耗时。
@Around("requestServer()")
public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
long start = System.currentTimeMillis();
Object result = proceedingJoinPoint.proceed();
LOGGER.info("Request Params : {}", getRequestParams(proceedingJoinPoint));
LOGGER.info("Result : {}", result);
LOGGER.info("Time Cost : {} ms", System.currentTimeMillis() - start);
return result;
}getRquestParams 方法：
通过 @PathVariable 以及 @RequestParam 注解传递的参数无法打印出参数名，因此需要手动拼接一下参数名，同时对文件对象进行了特殊处理，只需获取文件名即可。
private Map<String, Object> getRequestParams(ProceedingJoinPoint proceedingJoinPoint) {
Map<String, Object> requestParams = new HashMap<>();
//参数名
String[] paramNames = ((MethodSignature)proceedingJoinPoint.getSignature()).getParameterNames();
//参数值
Object[] paramValues = proceedingJoinPoint.getArgs();
for (int i = 0; i < paramNames.length; i++) {
Object value = paramValues[i];
//如果是文件对象
if (value instanceof MultipartFile) {
MultipartFile file = (MultipartFile) value;
value = file.getOriginalFilename(); //获取文件名
}
requestParams.put(paramNames[i], value);
}
return requestParams;
}完整的代码如下：
@Component
@Aspect
public class RequestLogAspect {
private final static Logger LOGGER = LoggerFactory.getLogger(RequestLogAspect.class);
@Pointcut("execution(* package_path.controller..*(..))")
public void requestServer() {
}
@Before("requestServer()")
public void doBefore(JoinPoint joinPoint) {
ServletRequestAttributes attributes = (ServletRequestAttributes)
RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
LOGGER.info("===============================Start========================");
LOGGER.info("IP : {}", request.getRemoteAddr());
LOGGER.info("URL : {}", request.getRequestURL().toString());
LOGGER.info("HTTP Method : {}", request.getMethod());
LOGGER.info("Class Method : {}.{}", joinPoint.getSignature().getDeclaringTypeName(),
joinPoint.getSignature().getName());
}
@Around("requestServer()")
public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
long start = System.currentTimeMillis();
Object result = proceedingJoinPoint.proceed();
LOGGER.info("Request Params : {}", getRequestParams(proceedingJoinPoint));
LOGGER.info("Result : {}", result);
LOGGER.info("Time Cost : {} ms", System.currentTimeMillis() - start);
return result;
}
@After("requestServer()")
public void doAfter(JoinPoint joinPoint) {
LOGGER.info("===============================End========================");
}
/**
* 获取入参
* @param proceedingJoinPoint
*
* @return
* */
private Map<String, Object> getRequestParams(ProceedingJoinPoint proceedingJoinPoint) {
Map<String, Object> requestParams = new HashMap<>();
//参数名
String[] paramNames =
((MethodSignature)proceedingJoinPoint.getSignature()).getParameterNames();
//参数值
Object[] paramValues = proceedingJoinPoint.getArgs();
for (int i = 0; i < paramNames.length; i++) {
Object value = paramValues[i];
//如果是文件对象
if (value instanceof MultipartFile) {
MultipartFile file = (MultipartFile) value;
//获取文件名
value = file.getOriginalFilename();
}
requestParams.put(paramNames[i], value);
}
return requestParams;
}
}高并发下请求日志切面
如果多个请求同时调用同一个接口，每个信息都打印一行，在高并发请求下确实会出现请求之间打印日志串行的问题，因为测试阶段请求数量较少没有出现串行的情况。
解决日志串行的问题只要将多行打印信息合并为一行就可以了，因此构造一个对象。
@Data
public class RequestInfo {
private String ip;
private String url;
private String httpMethod;
private String classMethod;
private Object requestParams;
private Object result;
private Long timeCost;
}环绕通知方法体：
@Around("requestServer()")
public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
long start = System.currentTimeMillis();
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
Object result = proceedingJoinPoint.proceed();
RequestInfo requestInfo = new RequestInfo();
requestInfo.setIp(request.getRemoteAddr());
requestInfo.setUrl(request.getRequestURL().toString());
requestInfo.setHttpMethod(request.getMethod());
requestInfo.setClassMethod(String.format("%s.%s", proceedingJoinPoint.getSignature().getDeclaringTypeName(),
proceedingJoinPoint.getSignature().getName()));
requestInfo.setRequestParams(getRequestParamsByProceedingJoinPoint(proceedingJoinPoint));
requestInfo.setResult(result);
requestInfo.setTimeCost(System.currentTimeMillis() - start);
LOGGER.info("Request Info : {}", JSON.toJSONString(requestInfo));
return result;
}将 url、http request 这些信息组装成 RequestInfo 对象，再序列化打印对象，打印序列化对象结果而不是直接打印对象是因为序列化有更直观、更清晰，同时可以借助在线解析工具对结果进行解析。
在解决高并发下请求串行问题的同时添加了对异常请求信息的打印，通过使用 @AfterThrowing 注解对抛出异常的方法进行处理。
RequestErrorInfo.java：
@Data
public class RequestErrorInfo {
private String ip;
private String url;
private String httpMethod;
private String classMethod;
private Object requestParams;
private RuntimeException exception;
}异常通知环绕体：
@AfterThrowing(pointcut = "requestServer()", throwing = "e")
public void doAfterThrow(JoinPoint joinPoint, RuntimeException e) {
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
RequestErrorInfo requestErrorInfo = new RequestErrorInfo();
requestErrorInfo.setIp(request.getRemoteAddr());
requestErrorInfo.setUrl(request.getRequestURL().toString());
requestErrorInfo.setHttpMethod(request.getMethod());
requestErrorInfo.setClassMethod(String.format("%s.%s", joinPoint.getSignature().getDeclaringTypeName(),
joinPoint.getSignature().getName()));
requestErrorInfo.setRequestParams(getRequestParamsByJoinPoint(joinPoint));
requestErrorInfo.setException(e);
LOGGER.info("Error Request Info : {}", JSON.toJSONString(requestErrorInfo));
}对于异常，耗时是没有意义的，因此不统计耗时，而是添加了异常的打印。
最后放一下完整日志请求切面代码：
@Component
@Aspect
public class RequestLogAspect {
private final static Logger LOGGER = LoggerFactory.getLogger(RequestLogAspect.class);
@Pointcut("execution(* com.hikvision.trainplatform.controller..*(..))")
public void requestServer() {
}
@Around("requestServer()")
public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
long start = System.currentTimeMillis();
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
Object result = proceedingJoinPoint.proceed();
RequestInfo requestInfo = new RequestInfo();
requestInfo.setIp(request.getRemoteAddr());
requestInfo.setUrl(request.getRequestURL().toString());
requestInfo.setHttpMethod(request.getMethod());
requestInfo.setClassMethod(String.format("%s.%s", proceedingJoinPoint.getSignature().getDeclaringTypeName(),
proceedingJoinPoint.getSignature().getName()));
requestInfo.setRequestParams(getRequestParamsByProceedingJoinPoint(proceedingJoinPoint));
requestInfo.setResult(result);
requestInfo.setTimeCost(System.currentTimeMillis() - start);
LOGGER.info("Request Info : {}", JSON.toJSONString(requestInfo));
return result;
}
@AfterThrowing(pointcut = "requestServer()", throwing = "e")
public void doAfterThrow(JoinPoint joinPoint, RuntimeException e) {
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
RequestErrorInfo requestErrorInfo = new RequestErrorInfo();
requestErrorInfo.setIp(request.getRemoteAddr());
requestErrorInfo.setUrl(request.getRequestURL().toString());
requestErrorInfo.setHttpMethod(request.getMethod());
requestErrorInfo.setClassMethod(String.format("%s.%s", joinPoint.getSignature().getDeclaringTypeName(),
joinPoint.getSignature().getName()));
requestErrorInfo.setRequestParams(getRequestParamsByJoinPoint(joinPoint));
requestErrorInfo.setException(e);
LOGGER.info("Error Request Info : {}", JSON.toJSONString(requestErrorInfo));
}
/**
* 获取入参
* @param proceedingJoinPoint
*
* @return
* */
private Map<String, Object> getRequestParamsByProceedingJoinPoint(ProceedingJoinPoint proceedingJoinPoint) {
//参数名
String[] paramNames = ((MethodSignature)proceedingJoinPoint.getSignature()).getParameterNames();
//参数值
Object[] paramValues = proceedingJoinPoint.getArgs();
return buildRequestParam(paramNames, paramValues);
}
private Map<String, Object> getRequestParamsByJoinPoint(JoinPoint joinPoint) {
//参数名
String[] paramNames = ((MethodSignature)joinPoint.getSignature()).getParameterNames();
//参数值
Object[] paramValues = joinPoint.getArgs();
return buildRequestParam(paramNames, paramValues);
}
private Map<String, Object> buildRequestParam(String[] paramNames, Object[] paramValues) {
Map<String, Object> requestParams = new HashMap<>();
for (int i = 0; i < paramNames.length; i++) {
Object value = paramValues[i];
//如果是文件对象
if (value instanceof MultipartFile) {
MultipartFile file = (MultipartFile) value;
value = file.getOriginalFilename(); //获取文件名
}
//如果是批量文件上传
if (value instanceof List) {
System.out.println("Yes...");
try {
List<MultipartFile> multipartFiles = castList(value, MultipartFile.class);
if (multipartFiles!= null) {
List<String> fileNames = new ArrayList<>();
for (MultipartFile file : multipartFiles) {
fileNames.add(file.getOriginalFilename());
}
requestParams.put(paramNames[i], fileNames);
break;
}
} catch (ClassCastException e) {
//忽略不是文件类型的List
}
}
requestParams.put(paramNames[i], value);
}
return requestParams;
}
public static <T> List<T> castList(Object obj, Class<T> clazz) {
List<T> result = new ArrayList<T>();
if (obj instanceof List<?>) {
for (Object o : (List<?>) obj) {
result.add(clazz.cast(o));
}
return result;
}
return null;
}
@Data
public class RequestInfo {
private String ip;
private String url;
private String httpMethod;
private String classMethod;
private Object requestParams;
private Object result;
private Long timeCost;
}
@Data
public class RequestErrorInfo {
private String ip;
private String url;
private String httpMethod;
private String classMethod;
private Object requestParams;
private RuntimeException exception;
}
}切点的执行流程：
请求进来时：
调用切点类(RequestLogAspect)的@Around注解的方法
执行该方法中的proceed()方法
？？？
Object result = proceedingJoinPoint.proceed();执行完proceed方法后，直接调用被@Before注解的方法，在该方法中，可以通过request获取IP、URL、被调用的Class和method
执行完@before方法后，进入接口：
AbstractAspectJAdvice.class
protected Object invokeAdviceMethod(@Nullable JoinPointMatch jpMatch, @Nullable Object returnValue, @Nullable Throwable ex) throws Throwable {
return this.invokeAdviceMethodWithGivenArgs(this.argBinding(this.getJoinPoint(), jpMatch, returnValue, ex));
}protected Object invokeAdviceMethodWithGivenArgs(Object[] args) throws Throwable {
Object[] actualArgs = args;
if (this.aspectJAdviceMethod.getParameterCount() == 0) {
actualArgs = null;
}
try {
ReflectionUtils.makeAccessible(this.aspectJAdviceMethod);
return this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs);
} catch (IllegalArgumentException var4) {
throw new AopInvocationException("Mismatch on arguments to advice method [" + this.aspectJAdviceMethod + "]; pointcut expression [" + this.pointcut.getPointcutExpression() + "]", var4);
} catch (InvocationTargetException var5) {
throw var5.getTargetException();
}
}AspectJMethodBeforeAdvice.class
public void before(Method method, Object[] args, @Nullable Object target) throws Throwable {
this.invokeAdviceMethod(this.getJoinPointMatch(), (Object)null, (Throwable)null);
}MethodBeforeAdviceInterceptor.class
@Nullable
public Object invoke(MethodInvocation mi) throws Throwable {
this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis());
return mi.proceed();
}然后进入 controller 层，service层，dao层, 数据库
执行完sql后，
进入
MethodProxy.class
public Object invoke(Object obj, Object[] args) throws Throwable {
try {
this.init();
MethodProxy.FastClassInfo fci = this.fastClassInfo;
return fci.f1.invoke(fci.i1, obj, args);
} catch (InvocationTargetException var4) {
throw var4.getTargetException();
} catch (IllegalArgumentException var5) {
if (this.fastClassInfo.i1 < 0) {
throw new IllegalArgumentException("Protected method: " + this.sig1);
} else {
throw var5;
}
}
}CglibAopProxy.class
protected Object invokeJoinpoint() throws Throwable {
return this.methodProxy != null
? this.methodProxy.invoke(this.target, this.arguments)
: super.invokeJoinpoint();
}ReflectiveMethodInvocation.class
@Nullable
public Object proceed() throws Throwable {
if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {
return this.invokeJoinpoint();
} else {
Object interceptorOrInterceptionAdvice = this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);
if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) {
InterceptorAndDynamicMethodMatcher dm = (InterceptorAndDynamicMethodMatcher)interceptorOrInterceptionAdvice;
Class<?> targetClass = this.targetClass != null ? this.targetClass : this.method.getDeclaringClass();
return dm.methodMatcher.matches(this.method, targetClass, this.arguments) ? dm.interceptor.invoke(this) : this.proceed();
} else {
return ((MethodInterceptor)interceptorOrInterceptionAdvice).invoke(this);
}
}
}CglibAopProxy.class
@Nullable
public Object proceed() throws Throwable {
try {
return super.proceed();
} catch (RuntimeException var2) {
throw var2;
} catch (Exception var3) {
if (!ReflectionUtils.declaresException(this.getMethod(), var3.getClass()) && !KotlinDetector.isKotlinType(this.getMethod().getDeclaringClass())) {
throw new UndeclaredThrowableException(var3);
} else {
throw var3;
}
}
}AspectJAfterAdvice.class
@Nullable
public Object invoke(MethodInvocation mi) throws Throwable {
Object var2;
try {
var2 = mi.proceed();
} finally {
this.invokeAdviceMethod(this.getJoinPointMatch(), (Object)null, (Throwable)null);
}
return var2;
}执行完上述方法中的finally中的方法后，进入被@After注解的方法：
执行完后回到：
AbstractAspectJAdvice.class
protected Object invokeAdviceMethodWithGivenArgs(Object[] args) throws Throwable {
Object[] actualArgs = args;
if (this.aspectJAdviceMethod.getParameterCount() == 0) {
actualArgs = null;
}
try {
ReflectionUtils.makeAccessible(this.aspectJAdviceMethod);
--> return this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs);
} catch (IllegalArgumentException var4) {
throw new AopInvocationException("Mismatch on arguments to advice method [" + this.aspectJAdviceMethod + "]; pointcut expression [" + this.pointcut.getPointcutExpression() + "]", var4);
} catch (InvocationTargetException var5) {
throw var5.getTargetException();
}
}
ReflectiveMethodInvocation.class
@Nullable
public Object proceed() throws Throwable {
if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {
return this.invokeJoinpoint();
} else {
Object interceptorOrInterceptionAdvice = this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);
if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) {
InterceptorAndDynamicMethodMatcher dm = (InterceptorAndDynamicMethodMatcher)interceptorOrInterceptionAdvice;
Class<?> targetClass = this.targetClass != null ? this.targetClass : this.method.getDeclaringClass();
return dm.methodMatcher.matches(this.method, targetClass, this.arguments) ? dm.interceptor.invoke(this) : this.proceed();
} else {
-->return ((MethodInterceptor)interceptorOrInterceptionAdvice).invoke(this);
}
}
}最后回到被@Around注解的方法中：
AspectJAroundAdvice.class
@Nullable
public Object invoke(MethodInvocation mi) throws Throwable {
if (!(mi instanceof ProxyMethodInvocation)) {
throw new IllegalStateException("MethodInvocation is not a Spring ProxyMethodInvocation: " + mi);
} else {
ProxyMethodInvocation pmi = (ProxyMethodInvocation)mi;
ProceedingJoinPoint pjp = this.lazyGetProceedingJoinPoint(pmi);
JoinPointMatch jpm = this.getJoinPointMatch(pmi);
-->return this.invokeAdviceMethod(pjp, jpm, (Object)null, (Throwable)null);
}
}InvocableHandlerMethod.class
@Nullable
public Object invokeForRequest(NativeWebRequest request, @Nullable ModelAndViewContainer mavContainer, Object... providedArgs) throws Exception {
Object[] args = this.getMethodArgumentValues(request, mavContainer, providedArgs);
if (logger.isTraceEnabled()) {
logger.trace("Arguments: " + Arrays.toString(args));
}
-->return this.doInvoke(args);
}@Nullable
protected Object doInvoke(Object... args) throws Exception {
Method method = this.getBridgedMethod();
ReflectionUtils.makeAccessible(method);
try {
return KotlinDetector.isSuspendingFunction(method) ? CoroutinesUtils.invokeSuspendingFunction(method, this.getBean(), args) : method.invoke(this.getBean(), args);
} catch (IllegalArgumentException var5) {
this.assertTargetBean(method, this.getBean(), args);
String text = var5.getMessage() != null ? var5.getMessage() : "Illegal argument";
throw new IllegalStateException(this.formatInvokeError(text, args), var5);
} catch (InvocationTargetException var6) {
Throwable targetException = var6.getTargetException();
if (targetException instanceof RuntimeException) {
throw (RuntimeException)targetException;
} else if (targetException instanceof Error) {
throw (Error)targetException;
} else if (targetException instanceof Exception) {
throw (Exception)targetException;
} else {
throw new IllegalStateException(this.formatInvokeError("Invocation failure", args), targetException);
}
}
}ServletInvocableHandlerMethod.class
public void invokeAndHandle(ServletWebRequest webRequest, ModelAndViewContainer mavContainer, Object... providedArgs) throws Exception {
Object returnValue = this.invokeForRequest(webRequest, mavContainer, providedArgs);
this.setResponseStatus(webRequest);
if (returnValue == null) {
if (this.isRequestNotModified(webRequest) || this.getResponseStatus() != null || mavContainer.isRequestHandled()) {
this.disableContentCachingIfNecessary(webRequest);
mavContainer.setRequestHandled(true);
return;
}
} else if (StringUtils.hasText(this.getResponseStatusReason())) {
mavContainer.setRequestHandled(true);
return;
}
mavContainer.setRequestHandled(false);
Assert.state(this.returnValueHandlers != null, "No return value handlers");
try {
this.returnValueHandlers.handleReturnValue(returnValue, this.getReturnValueType(returnValue), mavContainer, webRequest);
} catch (Exception var6) {
if (logger.isTraceEnabled()) {
logger.trace(this.formatErrorForReturnValue(returnValue), var6);
}
throw var6;
}
}RequestMappingHandlerAdapter.class
@Nullable
protected ModelAndView invokeHandlerMethod(HttpServletRequest request, HttpServletResponse response, HandlerMethod handlerMethod) throws Exception {
ServletWebRequest webRequest = new ServletWebRequest(request, response);
Object result;
try {
WebDataBinderFactory binderFactory = this.getDataBinderFactory(handlerMethod);
ModelFactory modelFactory = this.getModelFactory(handlerMethod, binderFactory);
ServletInvocableHandlerMethod invocableMethod = this.createInvocableHandlerMethod(handlerMethod);
if (this.argumentResolvers != null) {
invocableMethod.setHandlerMethodArgumentResolvers(this.argumentResolvers);
}
if (this.returnValueHandlers != null) {
invocableMethod.setHandlerMethodReturnValueHandlers(this.returnValueHandlers);
}
invocableMethod.setDataBinderFactory(binderFactory);
invocableMethod.setParameterNameDiscoverer(this.parameterNameDiscoverer);
ModelAndViewContainer mavContainer = new ModelAndViewContainer();
mavContainer.addAllAttributes(RequestContextUtils.getInputFlashMap(request));
modelFactory.initModel(webRequest, mavContainer, invocableMethod);
mavContainer.setIgnoreDefaultModelOnRedirect(this.ignoreDefaultModelOnRedirect);
AsyncWebRequest asyncWebRequest = WebAsyncUtils.createAsyncWebRequest(request, response);
asyncWebRequest.setTimeout(this.asyncRequestTimeout);
WebAsyncManager asyncManager = WebAsyncUtils.getAsyncManager(request);
asyncManager.setTaskExecutor(this.taskExecutor);
asyncManager.setAsyncWebRequest(asyncWebRequest);
asyncManager.registerCallableInterceptors(this.callableInterceptors);
asyncManager.registerDeferredResultInterceptors(this.deferredResultInterceptors);
if (asyncManager.hasConcurrentResult()) {
result = asyncManager.getConcurrentResult();
mavContainer = (ModelAndViewContainer)asyncManager.getConcurrentResultContext()[0];
asyncManager.clearConcurrentResult();
LogFormatUtils.traceDebug(this.logger, (traceOn) -> {
String formatted = LogFormatUtils.formatValue(result, !traceOn);
return "Resume with async result [" + formatted + "]";
});
invocableMethod = invocableMethod.wrapConcurrentResult(result);
}
invocableMethod.invokeAndHandle(webRequest, mavContainer, new Object[0]);
if (!asyncManager.isConcurrentHandlingStarted()) {
ModelAndView var15 = this.getModelAndView(mavContainer, modelFactory, webRequest);
return var15;
}
result = null;
} finally {
webRequest.requestCompleted();
}
return (ModelAndView)result;
}protected ModelAndView handleInternal(HttpServletRequest request, HttpServletResponse response, HandlerMethod handlerMethod) throws Exception {
this.checkRequest(request);
ModelAndView mav;
if (this.synchronizeOnSession) {
HttpSession session = request.getSession(false);
if (session != null) {
Object mutex = WebUtils.getSessionMutex(session);
synchronized(mutex) {
mav = this.invokeHandlerMethod(request, response, handlerMethod);
}
} else {
mav = this.invokeHandlerMethod(request, response, handlerMethod);
}
} else {
mav = this.invokeHandlerMethod(request, response, handlerMethod);
}
if (!response.containsHeader("Cache-Control")) {
if (this.getSessionAttributesHandler(handlerMethod).hasSessionAttributes()) {
this.applyCacheSeconds(response, this.cacheSecondsForSessionAttributeHandlers);
} else {
this.prepareResponse(response);
}
}
return mav;
}AbstractHandlerMethodAdapter.class
@Nullable
public final ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
return this.handleInternal(request, response, (HandlerMethod)handler);
}DispatcherServlet.class
protected void doDispatch(HttpServletRequest request, HttpServletResponse response) throws Exception {
HttpServletRequest processedRequest = request;
HandlerExecutionChain mappedHandler = null;
boolean multipartRequestParsed = false;
WebAsyncManager asyncManager = WebAsyncUtils.getAsyncManager(request);
try {
try {
ModelAndView mv = null;
Object dispatchException = null;
try {
processedRequest = this.checkMultipart(request);
multipartRequestParsed = processedRequest != request;
mappedHandler = this.getHandler(processedRequest);
if (mappedHandler == null) {
this.noHandlerFound(processedRequest, response);
return;
}
HandlerAdapter ha = this.getHandlerAdapter(mappedHandler.getHandler());
String method = request.getMethod();
boolean isGet = "GET".equals(method);
if (isGet || "HEAD".equals(method)) {
long lastModified = ha.getLastModified(request, mappedHandler.getHandler());
if ((new ServletWebRequest(request, response)).checkNotModified(lastModified) && isGet) {
return;
}
}
if (!mappedHandler.applyPreHandle(processedRequest, response)) {
return;
}
--> mv = ha.handle(processedRequest, response, mappedHandler.getHandler());
if (asyncManager.isConcurrentHandlingStarted()) {
return;
}
this.applyDefaultViewName(processedRequest, mv);
mappedHandler.applyPostHandle(processedRequest, response, mv);
} catch (Exception var20) {
dispatchException = var20;
} catch (Throwable var21) {
dispatchException = new NestedServletException("Handler dispatch failed", var21);
}
this.processDispatchResult(processedRequest, response, mappedHandler, mv, (Exception)dispatchException);
} catch (Exception var22) {
this.triggerAfterCompletion(processedRequest, response, mappedHandler, var22);
} catch (Throwable var23) {
this.triggerAfterCompletion(processedRequest, response, mappedHandler, new NestedServletException("Handler processing failed", var23));
}
} finally {
if (asyncManager.isConcurrentHandlingStarted()) {
if (mappedHandler != null) {
mappedHandler.applyAfterConcurrentHandlingStarted(processedRequest, response);
}
} else if (multipartRequestParsed) {
this.cleanupMultipart(processedRequest);
}
}
}protected void doService(HttpServletRequest request, HttpServletResponse response) throws Exception {
this.logRequest(request);
Map<String, Object> attributesSnapshot = null;
if (WebUtils.isIncludeRequest(request)) {
attributesSnapshot = new HashMap();
Enumeration attrNames = request.getAttributeNames();
label104:
while(true) {
String attrName;
do {
if (!attrNames.hasMoreElements()) {
break label104;
}
attrName = (String)attrNames.nextElement();
} while(!this.cleanupAfterInclude && !attrName.startsWith("org.springframework.web.servlet"));
attributesSnapshot.put(attrName, request.getAttribute(attrName));
}
}
request.setAttribute(WEB_APPLICATION_CONTEXT_ATTRIBUTE, this.getWebApplicationContext());
request.setAttribute(LOCALE_RESOLVER_ATTRIBUTE, this.localeResolver);
request.setAttribute(THEME_RESOLVER_ATTRIBUTE, this.themeResolver);
request.setAttribute(THEME_SOURCE_ATTRIBUTE, this.getThemeSource());
if (this.flashMapManager != null) {
FlashMap inputFlashMap = this.flashMapManager.retrieveAndUpdate(request, response);
if (inputFlashMap != null) {
request.setAttribute(INPUT_FLASH_MAP_ATTRIBUTE, Collections.unmodifiableMap(inputFlashMap));
}
request.setAttribute(OUTPUT_FLASH_MAP_ATTRIBUTE, new FlashMap());
request.setAttribute(FLASH_MAP_MANAGER_ATTRIBUTE, this.flashMapManager);
}
RequestPath previousRequestPath = null;
if (this.parseRequestPath) {
previousRequestPath = (RequestPath)request.getAttribute(ServletRequestPathUtils.PATH_ATTRIBUTE);
ServletRequestPathUtils.parseAndCache(request);
}
try {
-->this.doDispatch(request, response);
} finally {
if (!WebAsyncUtils.getAsyncManager(request).isConcurrentHandlingStarted() && attributesSnapshot != null) {
this.restoreAttributesAfterInclude(request, attributesSnapshot);
}
ServletRequestPathUtils.setParsedRequestPath(previousRequestPath, request);
}
}